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Repository: sqshq/sampler
Branch: master
Commit: 9bc7ba732d31
Files: 58
Total size: 211.3 KB
Directory structure:
gitextract_kb9i7998/
├── .github/
│ └── FUNDING.yml
├── .gitignore
├── .travis.yml
├── Dockerfile
├── LICENSE.md
├── README.md
├── asset/
│ ├── bindata.go
│ ├── file.go
│ └── player.go
├── component/
│ ├── alert.go
│ ├── asciibox/
│ │ └── asciibox.go
│ ├── barchart/
│ │ └── barchart.go
│ ├── block.go
│ ├── component.go
│ ├── gauge/
│ │ ├── gauge.go
│ │ └── gauge_test.go
│ ├── layout/
│ │ └── layout.go
│ ├── menu.go
│ ├── runchart/
│ │ ├── grid.go
│ │ ├── legend.go
│ │ └── runchart.go
│ ├── sparkline/
│ │ ├── sparkline.go
│ │ └── sparkline_test.go
│ ├── statusbar.go
│ ├── textbox/
│ │ └── textbox.go
│ └── util/
│ ├── format.go
│ ├── format_test.go
│ ├── geometry.go
│ ├── geometry_test.go
│ ├── math.go
│ ├── parse.go
│ └── parse_test.go
├── config/
│ ├── arrangement.go
│ ├── component.go
│ ├── config.go
│ ├── default.go
│ ├── options.go
│ └── validator.go
├── console/
│ ├── console.go
│ ├── palette.go
│ ├── palette_test.go
│ ├── signal.go
│ └── symbol.go
├── data/
│ ├── consumer.go
│ ├── consumer_test.go
│ ├── error.go
│ ├── int.go
│ ├── int_basic.go
│ ├── int_pty.go
│ ├── int_pty_windows.go
│ ├── item.go
│ ├── sampler.go
│ └── trigger.go
├── event/
│ └── handler.go
├── example.yml
├── go.mod
├── go.sum
└── main.go
================================================
FILE CONTENTS
================================================
================================================
FILE: .github/FUNDING.yml
================================================
custom: ['http://sampler.dev/sponsor']
================================================
FILE: .gitignore
================================================
*.dll
*.so
*.dylib
*.test
*.out
*.db
.idea/
*.iml
*.iws
================================================
FILE: .travis.yml
================================================
language: go
go:
- 1.12.x
- master
os:
- linux
- osx
addons:
apt:
packages:
- libasound2-dev
dist: trusty
sudo: false
install: true
script:
- env GO111MODULE=on go build
- env GO111MODULE=on go test -v ./...
================================================
FILE: Dockerfile
================================================
FROM ubuntu:focal
ENV Sampler=/usr/local/bin/sampler
RUN apt-get update && apt-get upgrade --yes && apt-get install libasound-dev wget --yes \
&& wget https://github.com/sqshq/sampler/releases/download/v1.1.0/sampler-1.1.0-linux-amd64 -O $Sampler \
&& chmod +x $Sampler
ENTRYPOINT ["sampler"]
================================================
FILE: LICENSE.md
================================================
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IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.
================================================
FILE: README.md
================================================
# Sampler. Visualization for any shell command.
[](https://travis-ci.com/sqshq/sampler) [](https://goreportcard.com/report/github.com/sqshq/sampler)
Sampler is a tool for shell commands execution, visualization and alerting. Configured with a simple YAML file.
## Why do I need it?
One can sample any dynamic process right from the terminal — observe changes in the database, monitor MQ in-flight messages, trigger a deployment script and get notification when it's done.
If there is a way to get a metric using a shell command, then it can be visualized with Sampler momentarily.
## Installation
### macOS
[HomeBrew](https://brew.sh):
```bash
brew install sampler
```
[MacPorts](https://www.macports.org):
```bash
sudo port install sampler
```
or
```bash
sudo curl -Lo /usr/local/bin/sampler https://github.com/sqshq/sampler/releases/download/v1.1.0/sampler-1.1.0-darwin-amd64
sudo chmod +x /usr/local/bin/sampler
```
### Linux
```bash
sudo wget https://github.com/sqshq/sampler/releases/download/v1.1.0/sampler-1.1.0-linux-amd64 -O /usr/local/bin/sampler
sudo chmod +x /usr/local/bin/sampler
```
Note: `libasound2-dev` system library is required to be installed for Sampler to play a [trigger](https://github.com/sqshq/sampler#triggers) sound tone. Usually the library is in place, but if not - you can install it with your favorite package manager, e.g `apt install libasound2-dev`
#### Packaging status
- [Fedora](https://apps.fedoraproject.org/packages/golang-github-sqshq-sampler) `sudo dnf install golang-github-sqshq-sampler` (F31+)
- [Arch](https://aur.archlinux.org/packages/sampler) `yay -S sampler`
### Windows (experimental)
Recommended to use with advanced console emulators, e.g. [Cmder](https://cmder.app/)
Via [Chocolatey](https://chocolatey.org/docs)
```powershell
choco install sampler
```
or
[Download .exe](https://github.com/sqshq/sampler/releases/download/v1.1.0/sampler-1.1.0-windows-amd64.exe)
### Docker
```
# Create a configuration file
vim config.yml
# Build the container image
docker build --tag sampler .
# Run a container
docker run --interactive --tty --volume $(pwd)/config.yml:/root/config.yml sampler --config /root/config.yml
```
## Usage
You specify shell commands, Sampler executes them with a required rate. The output is used for visualization.
Using Sampler is basically a 3-step process:
- Define your shell commands in a YAML configuration file
- Run `sampler -c config.yml`
- Adjust components size and location on UI
## But there are so many monitoring systems already
Sampler is by no means an alternative to full-scale monitoring systems, but rather an easy to setup development tool.
If spinning up and configuring [Prometheus with Grafana](https://prometheus.io) is complete overkill for you task, Sampler might be the right solution. No servers, no databases, no deploy - you specify shell commands, and it just works.
## Then it should be installed on every server I monitor?
No, you can run Sampler on local, but still gather telemetry from multiple remote machines. Any visualization might have `init` command, where you can ssh to a remote server. See the [SSH example](https://github.com/sqshq/sampler#ssh)
## Contents
- [Components](#components)
- [Runchart](#runchart)
- [Sparkline](#sparkline)
- [Barchart](#barchart)
- [Gauge](#gauge)
- [Textbox](#textbox)
- [Asciibox](#asciibox)
- [Bells and whistles](#bells-and-whistles)
- [Triggers (conditional actions)](#triggers)
- [Interactive shell (database interaction, remote server access, etc)](#interactive-shell-support)
- [Variables](#variables)
- [Color theme](#color-theme)
- [Real-world recipes (contributions welcome!)](#real-world-recipes)
- [Databases (MySQL, PostgreSQL, MongoDB, Neo4j)](#databases)
- [Kafka](#kafka)
- [Docker](#docker)
- [SSH](#ssh)
- [JMX](#jmx)
## Components
The following is a list of configuration examples for each component type, with macOS compatible sampling scripts.
### Runchart
```yml
runcharts:
- title: Search engine response time
rate-ms: 500 # sampling rate, default = 1000
scale: 2 # number of digits after sample decimal point, default = 1
legend:
enabled: true # enables item labels, default = true
details: false # enables item statistics: cur/min/max/dlt values, default = true
items:
- label: GOOGLE
sample: curl -o /dev/null -s -w '%{time_total}' https://www.google.com
color: 178 # 8-bit color number, default one is chosen from a pre-defined palette
- label: YAHOO
sample: curl -o /dev/null -s -w '%{time_total}' https://search.yahoo.com
- label: BING
sample: curl -o /dev/null -s -w '%{time_total}' https://www.bing.com
```
### Sparkline
```yml
sparklines:
- title: CPU usage
rate-ms: 200
scale: 0
sample: ps -A -o %cpu | awk '{s+=$1} END {print s}'
- title: Free memory pages
rate-ms: 200
scale: 0
sample: memory_pressure | grep 'Pages free' | awk '{print $3}'
```
### Barchart
```yml
barcharts:
- title: Local network activity
rate-ms: 500 # sampling rate, default = 1000
scale: 0 # number of digits after sample decimal point, default = 1
items:
- label: UDP bytes in
sample: nettop -J bytes_in -l 1 -m udp | awk '{sum += $4} END {print sum}'
- label: UDP bytes out
sample: nettop -J bytes_out -l 1 -m udp | awk '{sum += $4} END {print sum}'
- label: TCP bytes in
sample: nettop -J bytes_in -l 1 -m tcp | awk '{sum += $4} END {print sum}'
- label: TCP bytes out
sample: nettop -J bytes_out -l 1 -m tcp | awk '{sum += $4} END {print sum}'
```
### Gauge
```yml
gauges:
- title: Minute progress
rate-ms: 500 # sampling rate, default = 1000
scale: 2 # number of digits after sample decimal point, default = 1
percent-only: false # toggle display of the current value, default = false
color: 178 # 8-bit color number, default one is chosen from a pre-defined palette
cur:
sample: date +%S # sample script for current value
max:
sample: echo 60 # sample script for max value
min:
sample: echo 0 # sample script for min value
- title: Year progress
cur:
sample: date +%j
max:
sample: echo 365
min:
sample: echo 0
```
### Textbox
```yml
textboxes:
- title: Local weather
rate-ms: 10000 # sampling rate, default = 1000
sample: curl wttr.in?0ATQF
border: false # border around the item, default = true
color: 178 # 8-bit color number, default is white
- title: Docker containers stats
rate-ms: 500
sample: docker stats --no-stream --format "table {{.Name}}\t{{.CPUPerc}}\t{{.MemUsage}}\t{{.PIDs}}"
```
### Asciibox
```yml
asciiboxes:
- title: UTC time
rate-ms: 500 # sampling rate, default = 1000
font: 3d # font type, default = 2d
border: false # border around the item, default = true
color: 43 # 8-bit color number, default is white
sample: env TZ=UTC date +%r
```
## Bells and whistles
### Triggers
Triggers allow to perform conditional actions, like visual/sound alerts or an arbitrary shell command.
The following examples illustrate the concept.
#### Clock gauge, which shows minute progress and announces current time at the beginning of each minute
```yml
gauges:
- title: MINUTE PROGRESS
position: [[0, 18], [80, 0]]
cur:
sample: date +%S
max:
sample: echo 60
min:
sample: echo 0
triggers:
- title: CLOCK BELL EVERY MINUTE
condition: '[ $label == "cur" ] && [ $cur -eq 0 ] && echo 1 || echo 0' # expects "1" as TRUE indicator
actions:
terminal-bell: true # standard terminal bell, default = false
sound: true # NASA quindar tone, default = false
visual: false # notification with current value on top of the component area, default = false
script: say -v samantha `date +%I:%M%p` # an arbitrary script, which can use $cur, $prev and $label variables
```
#### Search engine latency chart, which alerts user when latency exceeds a threshold
```yml
runcharts:
- title: SEARCH ENGINE RESPONSE TIME (sec)
rate-ms: 200
items:
- label: GOOGLE
sample: curl -o /dev/null -s -w '%{time_total}' https://www.google.com
- label: YAHOO
sample: curl -o /dev/null -s -w '%{time_total}' https://search.yahoo.com
triggers:
- title: Latency threshold exceeded
condition: echo "$prev < 0.3 && $cur > 0.3" |bc -l # expects "1" as TRUE indicator
actions:
terminal-bell: true # standard terminal bell, default = false
sound: true # NASA quindar tone, default = false
visual: true # visual notification on top of the component area, default = false
script: 'say alert: ${label} latency exceeded ${cur} second' # an arbitrary script, which can use $cur, $prev and $label variables
```
### Interactive shell support
In addition to the `sample` command, one can specify `init` command (executed only once before sampling) and `transform` command (to post-process `sample` command output). That covers interactive shell use case, e.g. to establish connection to a database only once, and then perform polling within interactive shell session.
#### Basic mode
```yml
textboxes:
- title: MongoDB polling
rate-ms: 500
init: mongo --quiet --host=localhost test # executes only once to start the interactive session
sample: Date.now(); # executes with a required rate, in scope of the interactive session
transform: echo result = $sample # executes in scope of local session, $sample variable is available for transformation
```
#### PTY mode
In some cases interactive shell won't work, because its stdin is not a terminal. We can fool it, using PTY mode:
```yml
textboxes:
- title: Neo4j polling
pty: true # enables pseudo-terminal mode, default = false
init: cypher-shell -u neo4j -p pwd --format plain
sample: RETURN rand();
transform: echo "$sample" | tail -n 1
- title: Top on a remote server
pty: true # enables pseudo-terminal mode, default = false
init: ssh -i ~/user.pem ec2-user@1.2.3.4
sample: top
```
#### Multistep init
It is also possible to execute multiple init commands one after another, before you start sampling.
```yml
textboxes:
- title: Java application uptime
multistep-init:
- java -jar jmxterm-1.0.0-uber.jar
- open host:port # or local PID
- bean java.lang:type=Runtime
sample: get Uptime
```
### Variables
If the configuration file contains repeated patterns, they can be extracted into the `variables` section.
Also variables can be specified using `-v`/`--variable` flag on startup, and any system environment variables will also be available in the scripts.
```yml
variables:
mongoconnection: mongo --quiet --host=localhost test
barcharts:
- title: MongoDB documents by status
items:
- label: IN_PROGRESS
init: $mongoconnection
sample: db.getCollection('events').find({status:'IN_PROGRESS'}).count()
- label: SUCCESS
init: $mongoconnection
sample: db.getCollection('events').find({status:'SUCCESS'}).count()
- label: FAIL
init: $mongoconnection
sample: db.getCollection('events').find({status:'FAIL'}).count()
```
### Color theme
```yml
theme: light # default = dark
sparklines:
- title: CPU usage
sample: ps -A -o %cpu | awk '{s+=$1} END {print s}'
```
## Real-world recipes
### Databases
The following are different database connection examples. Interactive shell (init script) usage is recommended to establish connection only once and then reuse it during sampling.
<details><summary>MySQL</summary>
```yml
# prerequisite: installed mysql shell
variables:
mysql_connection: mysql -u root -s --database mysql --skip-column-names
sparklines:
- title: MySQL (random number example)
pty: true
init: $mysql_connection
sample: select rand();
```
</details>
<details><summary>PostgreSQL</summary>
```yml
# prerequisite: installed psql shell
variables:
PGPASSWORD: pwd
postgres_connection: psql -h localhost -U postgres --no-align --tuples-only
sparklines:
- title: PostgreSQL (random number example)
init: $postgres_connection
sample: select random();
```
</details>
<details><summary>MongoDB</summary>
```yml
# prerequisite: installed mongo shell
variables:
mongo_connection: mongo --quiet --host=localhost test
sparklines:
- title: MongoDB (random number example)
init: $mongo_connection
sample: Math.random();
```
</details>
<details><summary>Neo4j</summary>
```yml
# prerequisite: installed cypher shell
variables:
neo4j_connection: cypher-shell -u neo4j -p pwd --format plain
sparklines:
- title: Neo4j (random number example)
pty: true
init: $neo4j_connection
sample: RETURN rand();
transform: echo "$sample" | tail -n 1
```
</details>
### Kafka
<details><summary>Kafka lag per consumer group</summary>
```yml
variables:
kafka_connection: $KAFKA_HOME/bin/kafka-consumer-groups --bootstrap-server localhost:9092
runcharts:
- title: Kafka lag per consumer group
rate-ms: 5000
scale: 0
items:
- label: A->B
sample: $kafka_connection --group group_a --describe | awk 'NR>1 {sum += $5} END {print sum}'
- label: B->C
sample: $kafka_connection --group group_b --describe | awk 'NR>1 {sum += $5} END {print sum}'
- label: C->D
sample: $kafka_connection --group group_c --describe | awk 'NR>1 {sum += $5} END {print sum}'
```
</details>
### Docker
<details><summary>Docker containers stats (CPU, MEM, O/I)</summary>
```yml
textboxes:
- title: Docker containers stats
sample: docker stats --no-stream --format "table {{.Name}}\t{{.CPUPerc}}\t{{.MemPerc}}\t{{.MemUsage}}\t{{.NetIO}}\t{{.BlockIO}}\t{{.PIDs}}"
```
</details>
### SSH
<details><summary>TOP command on a remote server</summary>
```yml
variables:
sshconnection: ssh -i ~/my-key-pair.pem ec2-user@1.2.3.4
textboxes:
- title: SSH
pty: true
init: $sshconnection
sample: top
```
</details>
### JMX
<details><summary>Java application uptime example</summary>
```yml
# prerequisite: download [jmxterm jar file](https://docs.cyclopsgroup.org/jmxterm)
textboxes:
- title: Java application uptime
multistep-init:
- java -jar jmxterm-1.0.0-uber.jar
- open host:port # or local PID
- bean java.lang:type=Runtime
sample: get Uptime
transform: echo $sample | tr -dc '0-9' | awk '{printf "%.1f min", $1/1000/60}'
```
</details>
================================================
FILE: asset/bindata.go
================================================
// Code generated by go-bindata. (@generated) DO NOT EDIT.
// sources:
// 3d.flf
// 2d.flf
// quindar-tone.mp3
package asset
import (
"bytes"
"compress/gzip"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"strings"
"time"
)
func bindataRead(data []byte, name string) ([]byte, error) {
gz, err := gzip.NewReader(bytes.NewBuffer(data))
if err != nil {
return nil, fmt.Errorf("Read %q: %v", name, err)
}
var buf bytes.Buffer
_, err = io.Copy(&buf, gz)
clErr := gz.Close()
if err != nil {
return nil, fmt.Errorf("Read %q: %v", name, err)
}
if clErr != nil {
return nil, err
}
return buf.Bytes(), nil
}
type asset struct {
bytes []byte
info os.FileInfo
}
type bindataFileInfo struct {
name string
size int64
mode os.FileMode
modTime time.Time
}
func (fi bindataFileInfo) Name() string {
return fi.name
}
func (fi bindataFileInfo) Size() int64 {
return fi.size
}
func (fi bindataFileInfo) Mode() os.FileMode {
return fi.mode
}
func (fi bindataFileInfo) ModTime() time.Time {
return fi.modTime
}
func (fi bindataFileInfo) IsDir() bool {
return false
}
func (fi bindataFileInfo) Sys() interface{} {
return nil
}
var _data3dFlf = 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func data3dFlfBytes() ([]byte, error) {
return bindataRead(
_data3dFlf,
"3d.flf",
)
}
func data3dFlf() (*asset, error) {
bytes, err := data3dFlfBytes()
if err != nil {
return nil, err
}
info := bindataFileInfo{name: "3d.flf", size: 11345, mode: os.FileMode(420), modTime: time.Unix(1550435406, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
var _data2dFlf = 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func data2dFlfBytes() ([]byte, error) {
return bindataRead(
_data2dFlf,
"2d.flf",
)
}
func data2dFlf() (*asset, error) {
bytes, err := data2dFlfBytes()
if err != nil {
return nil, err
}
info := bindataFileInfo{name: "2d.flf", size: 28355, mode: os.FileMode(420), modTime: time.Unix(1550434995, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
var _dataQuindarToneMp3 = 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func dataQuindarToneMp3Bytes() ([]byte, error) {
return bindataRead(
_dataQuindarToneMp3,
"quindar-tone.mp3",
)
}
func dataQuindarToneMp3() (*asset, error) {
bytes, err := dataQuindarToneMp3Bytes()
if err != nil {
return nil, err
}
info := bindataFileInfo{name: "quindar-tone.mp3", size: 18977, mode: os.FileMode(420), modTime: time.Unix(1379677344, 0)}
a := &asset{bytes: bytes, info: info}
return a, nil
}
// Asset loads and returns the asset for the given name.
// It returns an error if the asset could not be found or
// could not be loaded.
func Asset(name string) ([]byte, error) {
cannonicalName := strings.Replace(name, "\\", "/", -1)
if f, ok := _bindata[cannonicalName]; ok {
a, err := f()
if err != nil {
return nil, fmt.Errorf("Asset %s can't read by error: %v", name, err)
}
return a.bytes, nil
}
return nil, fmt.Errorf("Asset %s not found", name)
}
// MustAsset is like Asset but panics when Asset would return an error.
// It simplifies safe initialization of global variables.
func MustAsset(name string) []byte {
a, err := Asset(name)
if err != nil {
panic("asset: Asset(" + name + "): " + err.Error())
}
return a
}
// AssetInfo loads and returns the asset info for the given name.
// It returns an error if the asset could not be found or
// could not be loaded.
func AssetInfo(name string) (os.FileInfo, error) {
cannonicalName := strings.Replace(name, "\\", "/", -1)
if f, ok := _bindata[cannonicalName]; ok {
a, err := f()
if err != nil {
return nil, fmt.Errorf("AssetInfo %s can't read by error: %v", name, err)
}
return a.info, nil
}
return nil, fmt.Errorf("AssetInfo %s not found", name)
}
// AssetNames returns the names of the assets.
func AssetNames() []string {
names := make([]string, 0, len(_bindata))
for name := range _bindata {
names = append(names, name)
}
return names
}
// _bindata is a table, holding each asset generator, mapped to its name.
var _bindata = map[string]func() (*asset, error){
"3d.flf": data3dFlf,
"2d.flf": data2dFlf,
"quindar-tone.mp3": dataQuindarToneMp3,
}
// AssetDir returns the file names below a certain
// directory embedded in the file by go-bindata.
// For example if you run go-bindata on data/... and data contains the
// following hierarchy:
// data/
// foo.txt
// img/
// a.png
// b.png
// then AssetDir("data") would return []string{"foo.txt", "img"}
// AssetDir("data/img") would return []string{"a.png", "b.png"}
// AssetDir("foo.txt") and AssetDir("notexist") would return an error
// AssetDir("") will return []string{"data"}.
func AssetDir(name string) ([]string, error) {
node := _bintree
if len(name) != 0 {
cannonicalName := strings.Replace(name, "\\", "/", -1)
pathList := strings.Split(cannonicalName, "/")
for _, p := range pathList {
node = node.Children[p]
if node == nil {
return nil, fmt.Errorf("Asset %s not found", name)
}
}
}
if node.Func != nil {
return nil, fmt.Errorf("Asset %s not found", name)
}
rv := make([]string, 0, len(node.Children))
for childName := range node.Children {
rv = append(rv, childName)
}
return rv, nil
}
type bintree struct {
Func func() (*asset, error)
Children map[string]*bintree
}
var _bintree = &bintree{nil, map[string]*bintree{
"data": &bintree{nil, map[string]*bintree{
"3d.flf": &bintree{data3dFlf, map[string]*bintree{}},
"2d.flf": &bintree{data2dFlf, map[string]*bintree{}},
"quindar-tone.mp3": &bintree{dataQuindarToneMp3, map[string]*bintree{}},
}},
}}
// RestoreAsset restores an asset under the given directory
func RestoreAsset(dir, name string) error {
data, err := Asset(name)
if err != nil {
return err
}
info, err := AssetInfo(name)
if err != nil {
return err
}
err = os.MkdirAll(_filePath(dir, filepath.Dir(name)), os.FileMode(0755))
if err != nil {
return err
}
err = ioutil.WriteFile(_filePath(dir, name), data, info.Mode())
if err != nil {
return err
}
err = os.Chtimes(_filePath(dir, name), info.ModTime(), info.ModTime())
if err != nil {
return err
}
return nil
}
// RestoreAssets restores an asset under the given directory recursively
func RestoreAssets(dir, name string) error {
children, err := AssetDir(name)
// File
if err != nil {
return RestoreAsset(dir, name)
}
// Dir
for _, child := range children {
err = RestoreAssets(dir, filepath.Join(name, child))
if err != nil {
return err
}
}
return nil
}
func _filePath(dir, name string) string {
cannonicalName := strings.Replace(name, "\\", "/", -1)
return filepath.Join(append([]string{dir}, strings.Split(cannonicalName, "/")...)...)
}
================================================
FILE: asset/file.go
================================================
package asset
import (
"bytes"
"io"
)
type AssetFile struct {
reader io.Reader
}
func NewAssetFile(data []byte) AssetFile {
return AssetFile{bytes.NewReader(data)}
}
func (a AssetFile) Read(p []byte) (n int, err error) {
return a.reader.Read(p)
}
func (a AssetFile) Close() error {
return nil
}
================================================
FILE: asset/player.go
================================================
package asset
import (
"github.com/hajimehoshi/go-mp3"
"github.com/hajimehoshi/oto"
"io"
"log"
)
type AudioPlayer struct {
player *oto.Player
beep []byte
}
func NewAudioPlayer() *AudioPlayer {
bytes, err := Asset("quindar-tone.mp3")
if err != nil {
log.Fatal("Failed to find audio file")
}
player, err := oto.NewPlayer(44100, 2, 2, 8192)
if err != nil {
// it is expected to fail when some of the system
// libraries are not available (e.g. libasound2)
// it is not the main functionality of the application,
// so we allow startup in no-sound mode
return nil
}
return &AudioPlayer{
player: player,
beep: bytes,
}
}
func (a *AudioPlayer) Beep() {
decoder, err := mp3.NewDecoder(NewAssetFile(a.beep))
if err != nil {
panic(err)
}
if _, err := io.Copy(a.player, decoder); err != nil {
panic(err)
}
}
func (a *AudioPlayer) Close() {
_ = a.player.Close()
}
================================================
FILE: component/alert.go
================================================
package component
import (
"fmt"
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/component/util"
"github.com/sqshq/sampler/console"
"github.com/sqshq/sampler/data"
"image"
"strings"
)
func RenderAlert(alert *data.Alert, area image.Rectangle, buffer *ui.Buffer) {
if alert == nil {
return
}
color := console.ColorWhite
if alert.Color != nil {
color = *alert.Color
}
width := util.Max([]int{len(alert.Title), len(alert.Text)}) + 10
if width > area.Dx() {
width = area.Dx()
}
cells := ui.WrapCells(ui.ParseStyles(fmt.Sprintf("%s\n%s\n",
strings.ToUpper(alert.Title), alert.Text), ui.NewStyle(console.ColorWhite)), uint(width))
var lines []string
line := ""
for i := 0; i < len(cells); i++ {
if cells[i].Rune == '\n' {
lines = append(lines, line)
line = ""
} else {
line += string(cells[i].Rune)
}
}
block := *ui.NewBlock()
block.SetRect(util.GetRectCoordinates(area, width, len(lines)))
block.BorderStyle = ui.Style{Fg: color, Bg: ui.ColorClear}
block.Draw(buffer)
buffer.Fill(ui.NewCell(' ', ui.NewStyle(console.ColorBlack)), block.Inner)
for i := 0; i < len(lines); i++ {
buffer.SetString(lines[i],
ui.NewStyle(color), util.GetMiddlePoint(block.Inner, lines[i], i-1))
}
}
================================================
FILE: component/asciibox/asciibox.go
================================================
package asciibox
import (
ui "github.com/gizak/termui/v3"
fl "github.com/mbndr/figlet4go"
"github.com/sqshq/sampler/asset"
"github.com/sqshq/sampler/component"
"github.com/sqshq/sampler/config"
"github.com/sqshq/sampler/console"
"github.com/sqshq/sampler/data"
"image"
"strings"
)
// AsciiBox represents a component with ascii-style text
type AsciiBox struct {
*ui.Block
*data.Consumer
alert *data.Alert
ascii string
style ui.Style
render *fl.AsciiRender
options *fl.RenderOptions
palette console.Palette
}
const asciiFontExtension = ".flf"
func NewAsciiBox(c config.AsciiBoxConfig, palette console.Palette) *AsciiBox {
options := fl.NewRenderOptions()
options.FontName = string(*c.Font)
fontStr, err := asset.Asset(options.FontName + asciiFontExtension)
if err != nil {
panic("Failed to load the font: " + err.Error())
}
render := fl.NewAsciiRender()
_ = render.LoadBindataFont(fontStr, options.FontName)
color := c.Color
if color == nil {
color = &palette.BaseColor
}
box := AsciiBox{
Block: component.NewBlock(c.Title, *c.Border, palette),
Consumer: data.NewConsumer(),
style: ui.NewStyle(*color),
render: render,
options: options,
palette: palette,
}
go func() {
for {
select {
case sample := <-box.SampleChannel:
box.renderText(sample)
case alert := <-box.AlertChannel:
box.alert = alert
}
}
}()
return &box
}
func (a *AsciiBox) renderText(sample *data.Sample) {
text := strings.TrimSpace(sample.Value)
lines := strings.Split(text, "\n")
a.ascii = ""
for _, line := range lines {
ascii, _ := a.render.RenderOpts(line, a.options)
a.ascii += ascii + "\n"
}
}
func (a *AsciiBox) Draw(buffer *ui.Buffer) {
buffer.Fill(ui.NewCell(' ', ui.NewStyle(ui.ColorBlack)), a.GetRect())
a.Block.Draw(buffer)
point := a.Inner.Min
cells := ui.ParseStyles(a.ascii, a.style)
for i := 0; i < len(cells) && point.Y < a.Inner.Max.Y; i++ {
if cells[i].Rune == '\n' {
point = image.Pt(a.Inner.Min.X, point.Y+1)
} else if point.In(a.Inner) {
buffer.SetCell(cells[i], point)
point = point.Add(image.Pt(1, 0))
}
}
component.RenderAlert(a.alert, a.Rectangle, buffer)
}
================================================
FILE: component/barchart/barchart.go
================================================
package barchart
import (
"fmt"
ui "github.com/gizak/termui/v3"
rw "github.com/mattn/go-runewidth"
"github.com/sqshq/sampler/component"
"github.com/sqshq/sampler/component/util"
"github.com/sqshq/sampler/config"
"github.com/sqshq/sampler/console"
"github.com/sqshq/sampler/data"
"image"
"math"
)
const (
barIndent int = 1
)
// BarChart presents categorical data with rectangular bars
type BarChart struct {
*ui.Block
*data.Consumer
bars []bar
scale int
maxValue float64
count int64
palette console.Palette
}
type bar struct {
label string
color ui.Color
value float64
delta float64
}
func NewBarChart(c config.BarChartConfig, palette console.Palette) *BarChart {
chart := BarChart{
Block: component.NewBlock(c.Title, true, palette),
Consumer: data.NewConsumer(),
bars: []bar{},
scale: *c.Scale,
maxValue: -math.MaxFloat64,
palette: palette,
}
for _, i := range c.Items {
chart.addBar(*i.Label, *i.Color)
}
go func() {
for {
select {
case sample := <-chart.SampleChannel:
chart.consumeSample(sample)
case alert := <-chart.AlertChannel:
chart.Alert = alert
}
}
}()
return &chart
}
func (b *BarChart) consumeSample(sample *data.Sample) {
b.count++
float, err := util.ParseFloat(sample.Value)
if err != nil {
b.HandleConsumeFailure("Failed to parse a number", err, sample)
return
}
b.HandleConsumeSuccess()
index := -1
for i, bar := range b.bars {
if bar.label == sample.Label {
index = i
}
}
bar := b.bars[index]
bar.delta = float - bar.value
bar.value = float
b.bars[index] = bar
if float > b.maxValue {
b.maxValue = float
}
// normalize bars height once in a while
if b.count%500 == 0 {
b.reselectMaxValue()
}
}
func (b *BarChart) addBar(label string, color ui.Color) {
b.bars = append(b.bars, bar{label: label, color: color, value: 0})
}
func (b *BarChart) reselectMaxValue() {
maxValue := -math.MaxFloat64
for _, bar := range b.bars {
if bar.value > maxValue {
maxValue = bar.value
}
}
b.maxValue = maxValue
}
// Draw renders the barchart
func (b *BarChart) Draw(buffer *ui.Buffer) {
b.Block.Draw(buffer)
barWidth := int(math.Floor(float64(b.Inner.Dx()-len(b.bars)*barIndent) / float64(len(b.bars))))
barXCoordinate := b.Inner.Min.X + barIndent
labelStyle := ui.NewStyle(b.palette.BaseColor)
for _, bar := range b.bars {
// draw bar
height := int((bar.value / b.maxValue) * float64(b.Inner.Dy()-1))
if height <= 1 {
height = 2
}
maxYCoordinate := b.Inner.Max.Y - height
for x := barXCoordinate; x < ui.MinInt(barXCoordinate+barWidth, b.Inner.Max.X-barIndent); x++ {
for y := b.Inner.Max.Y - 2; y >= maxYCoordinate; y-- {
c := ui.NewCell(console.SymbolHorizontalBar, ui.NewStyle(bar.color))
buffer.SetCell(c, image.Pt(x, y))
}
}
// draw label
labelXCoordinate := barXCoordinate +
int(float64(barWidth)/2) -
int(float64(rw.StringWidth(bar.label))/2)
buffer.SetString(
bar.label,
labelStyle,
image.Pt(labelXCoordinate, b.Inner.Max.Y-1))
// draw value & delta
value := util.FormatValue(bar.value, b.scale)
if bar.delta != 0 {
value = fmt.Sprintf("%s/%s", value, util.FormatDelta(bar.delta, b.scale))
}
valueXCoordinate := barXCoordinate +
int(float64(barWidth)/2) -
int(float64(rw.StringWidth(value))/2)
buffer.SetString(
value,
labelStyle,
image.Pt(valueXCoordinate, maxYCoordinate-1))
barXCoordinate += barWidth + barIndent
}
component.RenderAlert(b.Alert, b.Rectangle, buffer)
}
================================================
FILE: component/block.go
================================================
package component
import (
"fmt"
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/console"
)
func NewBlock(title string, border bool, palette console.Palette) *ui.Block {
style := ui.Style{Fg: palette.BaseColor, Bg: ui.ColorClear}
block := ui.NewBlock()
block.Border = border
block.BorderStyle = style
block.TitleStyle = style
if len(title) > 0 {
block.Title = fmt.Sprintf(" %s ", title)
}
return block
}
================================================
FILE: component/component.go
================================================
package component
import (
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/config"
"github.com/sqshq/sampler/data"
)
type Component struct {
ui.Drawable
*data.Consumer
Type config.ComponentType
Title string
Location config.Location
Size config.Size
RateMs int
}
func NewComponent(dbl ui.Drawable, cmr *data.Consumer, cfg config.ComponentConfig) *Component {
return &Component{
Drawable: dbl,
Consumer: cmr,
Type: cfg.Type,
Title: cfg.Title,
Location: cfg.GetLocation(),
Size: cfg.GetSize(),
RateMs: *cfg.RateMs,
}
}
func (c *Component) Move(x, y int) {
c.Location.X += x
c.Location.Y += y
c.normalize()
}
func (c *Component) Resize(x, y int) {
c.Size.X += x
c.Size.Y += y
c.normalize()
}
func (c *Component) normalize() {
if c.Location.X < 0 {
c.Location.X = 0
}
if c.Location.Y < 0 {
c.Location.Y = 0
}
}
================================================
FILE: component/gauge/gauge.go
================================================
package gauge
import (
"fmt"
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/component"
"github.com/sqshq/sampler/component/util"
"github.com/sqshq/sampler/config"
"github.com/sqshq/sampler/console"
"github.com/sqshq/sampler/data"
"image"
)
const (
MinValueLabel = "min"
MaxValueLabel = "max"
CurValueLabel = "cur"
)
// Gauge displays cur value between specified min and max values
type Gauge struct {
*ui.Block
*data.Consumer
minValue float64
maxValue float64
curValue float64
color ui.Color
scale int
percentOnly bool
palette console.Palette
}
func NewGauge(c config.GaugeConfig, palette console.Palette) *Gauge {
g := Gauge{
Block: component.NewBlock(c.Title, true, palette),
Consumer: data.NewConsumer(),
color: *c.Color,
scale: *c.Scale,
percentOnly: *c.PercentOnly,
palette: palette,
}
go func() {
for {
select {
case sample := <-g.SampleChannel:
g.ConsumeSample(sample)
case alert := <-g.AlertChannel:
g.Alert = alert
}
}
}()
return &g
}
func (g *Gauge) ConsumeSample(sample *data.Sample) {
float, err := util.ParseFloat(sample.Value)
if err != nil {
g.HandleConsumeFailure("Failed to parse a number", err, sample)
return
}
g.HandleConsumeSuccess()
switch sample.Label {
case MinValueLabel:
g.minValue = float
break
case MaxValueLabel:
g.maxValue = float
break
case CurValueLabel:
g.curValue = float
break
}
}
func (g *Gauge) Draw(buffer *ui.Buffer) {
g.Block.Draw(buffer)
percent := calculatePercent(g)
var label string
if g.percentOnly {
label = fmt.Sprintf(" %v%% ", util.FormatValue(percent, g.scale))
} else {
label = fmt.Sprintf(" %v%% (%v) ", util.FormatValue(percent, g.scale), util.FormatValue(g.curValue, g.scale))
}
// draw bar
barWidth := int((percent / 100) * float64(g.Inner.Dx()))
if barWidth == 0 {
barWidth = 1
} else if barWidth > g.Dx()-2 {
barWidth = g.Dx() - 2
}
buffer.Fill(
ui.NewCell(console.SymbolVerticalBar, ui.NewStyle(g.color)),
image.Rect(g.Inner.Min.X+1, g.Inner.Min.Y, g.Inner.Min.X+barWidth, g.Inner.Max.Y),
)
// draw label
labelXCoordinate := g.Inner.Min.X + (g.Inner.Dx() / 2) - int(float64(len(label))/2)
labelYCoordinate := g.Inner.Min.Y + ((g.Inner.Dy() - 1) / 2)
if labelYCoordinate < g.Inner.Max.Y {
for i, char := range label {
style := ui.NewStyle(g.palette.BaseColor)
if labelXCoordinate+i+1 <= g.Inner.Min.X+barWidth {
style = ui.NewStyle(g.palette.BaseColor, ui.ColorClear)
}
buffer.SetCell(ui.NewCell(char, style), image.Pt(labelXCoordinate+i, labelYCoordinate))
}
}
component.RenderAlert(g.Alert, g.Rectangle, buffer)
}
func calculatePercent(g *Gauge) float64 {
if g.curValue != g.minValue && g.maxValue != g.minValue {
return (100 * (g.curValue - g.minValue)) / (g.maxValue - g.minValue)
}
return 0
}
================================================
FILE: component/gauge/gauge_test.go
================================================
package gauge
import "testing"
func Test_calculatePercent(t *testing.T) {
type args struct {
g *Gauge
}
tests := []struct {
name string
args args
want float64
}{
{"should calculate percent between 0 and 60", args{&Gauge{minValue: 0, maxValue: 60, curValue: 45}}, 75},
{"should calculate percent between 10 and 60", args{&Gauge{minValue: 10, maxValue: 60, curValue: 59}}, 98},
{"should calculate percent between -20 and 60", args{&Gauge{minValue: -20, maxValue: 60, curValue: 0}}, 25},
{"should calculate percent when cur value = min value", args{&Gauge{minValue: -10, maxValue: 60, curValue: -10}}, 0},
{"should calculate percent when min value = max value", args{&Gauge{minValue: -124, maxValue: -124, curValue: -124}}, 0},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := calculatePercent(tt.args.g); got != tt.want {
t.Errorf("calculatePercent() = %v, want %v", got, tt.want)
}
})
}
}
================================================
FILE: component/layout/layout.go
================================================
package layout
import (
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/component"
"github.com/sqshq/sampler/component/runchart"
"github.com/sqshq/sampler/component/util"
"github.com/sqshq/sampler/config"
"github.com/sqshq/sampler/console"
"github.com/sqshq/sampler/data"
"image"
"math"
"time"
)
// Layout represents component arrangement on the screen
type Layout struct {
ui.Block
Components []*component.Component
statusbar *component.StatusBar
menu *component.Menu
ChangeModeEvents chan Mode
mode Mode
selection int
positionsChanged bool
startupTime time.Time
}
type Mode rune
const (
ModeDefault Mode = 0
ModeIntro Mode = 1
ModePause Mode = 2
ModeComponentSelect Mode = 3
ModeMenuOptionSelect Mode = 4
ModeComponentMove Mode = 5
ModeComponentResize Mode = 6
ModeChartPinpoint Mode = 7
)
const (
minDimension = 3
statusbarHeight = 1
)
func NewLayout(statusline *component.StatusBar, menu *component.Menu) *Layout {
width, height := ui.TerminalDimensions()
block := *ui.NewBlock()
block.SetRect(0, 0, width, height)
statusline.SetRect(0, height-statusbarHeight, width, height)
return &Layout{
Block: block,
Components: make([]*component.Component, 0),
statusbar: statusline,
menu: menu,
mode: ModeDefault,
selection: 0,
ChangeModeEvents: make(chan Mode, 10),
startupTime: time.Now(),
}
}
func (l *Layout) AddComponent(cpt *component.Component) {
l.Components = append(l.Components, cpt)
}
func (l *Layout) StartWithIntro() {
l.mode = ModeIntro
}
func (l *Layout) changeMode(m Mode) {
if m == ModeComponentResize || m == ModeComponentMove {
l.positionsChanged = true
}
l.mode = m
l.ChangeModeEvents <- m
}
func (l *Layout) HandleMouseClick(x int, y int) {
if l.mode == ModeIntro {
return
}
l.menu.Idle()
selected, i := l.findComponentAtPoint(image.Point{X: x, Y: y})
if selected == nil {
l.changeMode(ModeDefault)
} else {
l.selection = i
l.menu.Highlight(selected)
l.changeMode(ModeComponentSelect)
}
}
func (l *Layout) HandleKeyboardEvent(e string) {
selected := l.getSelection()
switch e {
case console.KeyPause1, console.KeyPause2:
if l.mode == ModePause {
l.changeMode(ModeDefault)
l.statusbar.TogglePause()
} else {
if selected.Type == config.TypeRunChart {
selected.CommandChannel <- &data.Command{Type: runchart.CommandDisableSelection}
}
l.menu.Idle()
l.changeMode(ModePause)
l.statusbar.TogglePause()
}
case console.KeyEnter:
switch l.mode {
case ModeComponentSelect:
l.menu.Choose()
l.changeMode(ModeMenuOptionSelect)
case ModeMenuOptionSelect:
option := l.menu.GetSelectedOption()
switch option {
case component.MenuOptionMove:
l.changeMode(ModeComponentMove)
l.menu.MoveOrResize()
case component.MenuOptionResize:
l.changeMode(ModeComponentResize)
l.menu.MoveOrResize()
case component.MenuOptionPinpoint:
l.changeMode(ModeChartPinpoint)
l.menu.Idle()
selected.CommandChannel <- &data.Command{Type: runchart.CommandMoveSelection, Value: 0}
case component.MenuOptionResume:
l.changeMode(ModeDefault)
l.menu.Idle()
}
case ModeComponentMove:
fallthrough
case ModeComponentResize:
l.menu.Idle()
l.changeMode(ModeDefault)
break
}
case console.KeyEsc:
l.resetAlerts()
switch l.mode {
case ModeChartPinpoint:
selected.CommandChannel <- &data.Command{Type: runchart.CommandDisableSelection}
fallthrough
case ModeComponentSelect:
fallthrough
case ModeMenuOptionSelect:
l.menu.Idle()
l.changeMode(ModeDefault)
case ModeComponentMove:
fallthrough
case ModeComponentResize:
l.menu.Idle()
l.changeMode(ModeDefault)
}
case console.KeyLeft:
switch l.mode {
case ModeDefault:
l.changeMode(ModeComponentSelect)
l.menu.Highlight(l.getComponent(l.selection))
case ModeChartPinpoint:
selected.CommandChannel <- &data.Command{Type: runchart.CommandMoveSelection, Value: -1}
case ModeComponentSelect:
l.moveSelection(e)
l.menu.Highlight(l.getComponent(l.selection))
case ModeComponentMove:
selected.Move(-1, 0)
case ModeComponentResize:
selected.Resize(-1, 0)
}
case console.KeyRight:
switch l.mode {
case ModeDefault:
l.changeMode(ModeComponentSelect)
l.menu.Highlight(l.getComponent(l.selection))
case ModeChartPinpoint:
selected.CommandChannel <- &data.Command{Type: runchart.CommandMoveSelection, Value: 1}
case ModeComponentSelect:
l.moveSelection(e)
l.menu.Highlight(l.getComponent(l.selection))
case ModeComponentMove:
selected.Move(1, 0)
case ModeComponentResize:
selected.Resize(1, 0)
}
case console.KeyUp:
switch l.mode {
case ModeDefault:
l.changeMode(ModeComponentSelect)
l.menu.Highlight(l.getComponent(l.selection))
case ModeComponentSelect:
l.moveSelection(e)
l.menu.Highlight(l.getComponent(l.selection))
case ModeMenuOptionSelect:
l.menu.Up()
case ModeComponentMove:
selected.Move(0, -1)
case ModeComponentResize:
selected.Resize(0, -1)
}
case console.KeyDown:
switch l.mode {
case ModeDefault:
l.changeMode(ModeComponentSelect)
l.menu.Highlight(l.getComponent(l.selection))
case ModeComponentSelect:
l.moveSelection(e)
l.menu.Highlight(l.getComponent(l.selection))
case ModeMenuOptionSelect:
l.menu.Down()
case ModeComponentMove:
selected.Move(0, 1)
case ModeComponentResize:
selected.Resize(0, 1)
}
}
}
func (l *Layout) ChangeDimensions(width, height int) {
l.SetRect(0, 0, width, height)
}
func (l *Layout) getComponent(i int) *component.Component {
return l.Components[i]
}
func (l *Layout) getSelection() *component.Component {
return l.Components[l.selection]
}
func (l *Layout) moveSelection(direction string) {
previouslySelected := l.getSelection()
newlySelectedIndex := l.selection + 1
for i, current := range l.Components {
if current == previouslySelected {
continue
}
if newlySelectedIndex >= len(l.Components) {
newlySelectedIndex = i
}
var previouslySelectedCornerPoint image.Point
var newlySelectedCornerPoint image.Point
var currentCornerPoint image.Point
switch direction {
case console.KeyLeft:
previouslySelectedCornerPoint = util.GetRectLeftSideCenter(previouslySelected.GetRect())
newlySelectedCornerPoint = util.GetRectRightSideCenter(l.getComponent(newlySelectedIndex).GetRect())
currentCornerPoint = util.GetRectRightSideCenter(current.GetRect())
case console.KeyRight:
previouslySelectedCornerPoint = util.GetRectRightSideCenter(previouslySelected.GetRect())
newlySelectedCornerPoint = util.GetRectLeftSideCenter(l.getComponent(newlySelectedIndex).GetRect())
currentCornerPoint = util.GetRectLeftSideCenter(current.GetRect())
case console.KeyUp:
previouslySelectedCornerPoint = util.GetRectTopSideCenter(previouslySelected.GetRect())
newlySelectedCornerPoint = util.GetRectBottomSideCenter(l.getComponent(newlySelectedIndex).GetRect())
currentCornerPoint = util.GetRectBottomSideCenter(current.GetRect())
case console.KeyDown:
previouslySelectedCornerPoint = util.GetRectBottomSideCenter(previouslySelected.GetRect())
newlySelectedCornerPoint = util.GetRectTopSideCenter(l.getComponent(newlySelectedIndex).GetRect())
currentCornerPoint = util.GetRectTopSideCenter(current.GetRect())
}
switch direction {
case console.KeyLeft:
fallthrough
case console.KeyRight:
if ui.AbsInt(currentCornerPoint.X-previouslySelectedCornerPoint.X) <= ui.AbsInt(newlySelectedCornerPoint.X-previouslySelectedCornerPoint.X) {
if ui.AbsInt(currentCornerPoint.Y-previouslySelectedCornerPoint.Y) <= ui.AbsInt(newlySelectedCornerPoint.Y-previouslySelectedCornerPoint.Y) {
newlySelectedIndex = i
}
}
case console.KeyUp:
fallthrough
case console.KeyDown:
if ui.AbsInt(currentCornerPoint.Y-previouslySelectedCornerPoint.Y) <= ui.AbsInt(newlySelectedCornerPoint.Y-previouslySelectedCornerPoint.Y) {
if ui.AbsInt(currentCornerPoint.X-previouslySelectedCornerPoint.X) <= ui.AbsInt(newlySelectedCornerPoint.X-previouslySelectedCornerPoint.X) {
newlySelectedIndex = i
}
}
}
}
if newlySelectedIndex < len(l.Components) {
l.selection = newlySelectedIndex
}
}
func (l *Layout) Draw(buffer *ui.Buffer) {
columnWidth := float64(l.GetRect().Dx()) / float64(console.ColumnsCount)
rowHeight := float64(l.GetRect().Dy()-statusbarHeight) / float64(console.RowsCount)
for _, c := range l.Components {
rectangle := calculateComponentCoordinates(c, columnWidth, rowHeight)
c.SetRect(rectangle.Min.X, rectangle.Min.Y, rectangle.Max.X, rectangle.Max.Y)
}
for _, c := range l.Components {
c.Draw(buffer)
}
l.statusbar.SetRect(
0, l.GetRect().Dy()-statusbarHeight,
l.GetRect().Dx(), l.GetRect().Dy())
l.statusbar.Draw(buffer)
l.menu.Draw(buffer)
}
func (l *Layout) findComponentAtPoint(point image.Point) (*component.Component, int) {
columnWidth := float64(l.GetRect().Dx()) / float64(console.ColumnsCount)
rowHeight := float64(l.GetRect().Dy()-statusbarHeight) / float64(console.RowsCount)
for i, c := range l.Components {
rectangle := calculateComponentCoordinates(c, columnWidth, rowHeight)
if point.In(rectangle) {
return c, i
}
}
return nil, -1
}
func calculateComponentCoordinates(c *component.Component, columnWidth float64, rowHeight float64) image.Rectangle {
x1 := math.Floor(float64(c.Location.X) * columnWidth)
y1 := math.Floor(float64(c.Location.Y) * rowHeight)
x2 := x1 + math.Floor(float64(c.Size.X))*columnWidth
y2 := y1 + math.Floor(float64(c.Size.Y))*rowHeight
if x2-x1 < minDimension {
x2 = x1 + minDimension
}
if y2-y1 < minDimension {
y2 = y1 + minDimension
}
return image.Rectangle{Min: image.Point{
X: int(x1), Y: int(y1)},
Max: image.Point{X: int(x2), Y: int(y2)},
}
}
func (l *Layout) resetAlerts() {
for _, c := range l.Components {
c.AlertChannel <- nil
}
}
func (l *Layout) WerePositionsChanged() bool {
return l.positionsChanged
}
================================================
FILE: component/menu.go
================================================
package component
import (
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/component/util"
"github.com/sqshq/sampler/config"
"github.com/sqshq/sampler/console"
"image"
)
type Menu struct {
*ui.Block
options []menuOption
component Component
mode menuMode
option menuOption
palette console.Palette
}
type menuMode rune
const (
menuModeIdle menuMode = 0
menuModeHighlight menuMode = 1
menuModeOptionSelect menuMode = 2
menuModeMoveAndResize menuMode = 3
)
type menuOption string
const (
MenuOptionMove menuOption = "MOVE"
MenuOptionResize menuOption = "RESIZE"
MenuOptionPinpoint menuOption = "PINPOINT"
MenuOptionResume menuOption = "RESUME"
)
const (
minimalMenuHeight = 8
)
func NewMenu(palette console.Palette) *Menu {
return &Menu{
Block: NewBlock("", true, palette),
options: []menuOption{MenuOptionMove, MenuOptionResize, MenuOptionPinpoint, MenuOptionResume},
mode: menuModeIdle,
option: MenuOptionMove,
palette: palette,
}
}
func (m *Menu) GetSelectedOption() menuOption {
return m.option
}
func (m *Menu) Highlight(component *Component) {
m.component = *component
m.updateDimensions()
m.mode = menuModeHighlight
m.Title = component.Title
}
func (m *Menu) Choose() {
m.mode = menuModeOptionSelect
}
func (m *Menu) Idle() {
m.mode = menuModeIdle
}
func (m *Menu) Up() {
for i := 1; i < len(m.options); i++ {
if m.options[i] == m.option {
m.option = m.options[i-1]
break
}
}
if m.option == MenuOptionPinpoint && m.component.Type != config.TypeRunChart {
m.Up()
}
}
func (m *Menu) Down() {
for i := 0; i < len(m.options)-1; i++ {
if m.options[i] == m.option {
m.option = m.options[i+1]
break
}
}
if m.option == MenuOptionPinpoint && m.component.Type != config.TypeRunChart {
m.Down()
}
}
func (m *Menu) MoveOrResize() {
m.mode = menuModeMoveAndResize
}
func (m *Menu) Draw(buffer *ui.Buffer) {
if m.mode == menuModeIdle {
return
}
m.updateDimensions()
buffer.Fill(ui.NewCell(' ', ui.NewStyle(m.palette.ReverseColor)), m.GetRect())
if m.Dy() > minimalMenuHeight {
m.drawInnerBorder(buffer)
}
m.Block.Draw(buffer)
switch m.mode {
case menuModeHighlight:
m.renderHighlight(buffer)
case menuModeMoveAndResize:
m.renderMoveAndResize(buffer)
case menuModeOptionSelect:
m.renderOptions(buffer)
}
}
func (m *Menu) renderHighlight(buffer *ui.Buffer) {
optionsText := "<ENTER> to view options"
resumeText := "<ESC> to resume"
if m.Dy() <= minimalMenuHeight {
buffer.SetString(
optionsText,
ui.NewStyle(console.ColorDarkGrey),
util.GetMiddlePoint(m.Block.Rectangle, optionsText, -1),
)
return
}
m.printAllDirectionsArrowSign(buffer, -1)
optionsTextPoint := util.GetMiddlePoint(m.Block.Rectangle, optionsText, 3)
if optionsTextPoint.Y+1 < m.Inner.Max.Y {
buffer.SetString(
optionsText,
ui.NewStyle(console.ColorDarkGrey),
util.GetMiddlePoint(m.Block.Rectangle, optionsText, 3),
)
}
resumeTextPoint := util.GetMiddlePoint(m.Block.Rectangle, resumeText, 4)
if resumeTextPoint.Y+1 < m.Inner.Max.Y {
buffer.SetString(
resumeText,
ui.NewStyle(console.ColorDarkGrey),
resumeTextPoint,
)
}
}
func (m *Menu) renderMoveAndResize(buffer *ui.Buffer) {
saveText := "<ENTER> to save changes"
if m.Dy() <= minimalMenuHeight {
buffer.SetString(saveText, ui.NewStyle(console.ColorDarkGrey), util.GetMiddlePoint(m.Block.Rectangle, saveText, -1))
return
}
m.printAllDirectionsArrowSign(buffer, -1)
buffer.SetString(saveText, ui.NewStyle(console.ColorDarkGrey), util.GetMiddlePoint(m.Block.Rectangle, saveText, 3))
}
func (m *Menu) printAllDirectionsArrowSign(buffer *ui.Buffer, y int) {
arrows := []string{
" ↑ ",
"← →",
" ↓ ",
}
for i, a := range arrows {
util.PrintString(
a,
ui.NewStyle(console.ColorOlive),
util.GetMiddlePoint(m.Block.Rectangle, a, i+y),
buffer,
)
}
}
func (m *Menu) renderOptions(buffer *ui.Buffer) {
highlightedStyle := ui.NewStyle(m.palette.ReverseColor, console.ColorOlive)
regularStyle := ui.NewStyle(m.palette.BaseColor, m.palette.ReverseColor)
offset := 1
for _, option := range m.options {
style := regularStyle
if m.option == option {
style = highlightedStyle
}
if option != MenuOptionPinpoint || m.component.Type == config.TypeRunChart {
offset += 2
point := util.GetMiddlePoint(m.Block.Rectangle, string(option), offset-6)
buffer.SetString(string(option), style, point)
}
}
}
func (m *Menu) updateDimensions() {
r := m.component.GetRect()
m.SetRect(r.Min.X, r.Min.Y, r.Max.X, r.Max.Y)
}
func (m *Menu) drawInnerBorder(buffer *ui.Buffer) {
verticalCell := ui.Cell{ui.VERTICAL_LINE, m.BorderStyle}
horizontalCell := ui.Cell{ui.HORIZONTAL_LINE, m.BorderStyle}
// draw lines
buffer.Fill(horizontalCell, image.Rect(m.Min.X+2, m.Min.Y+2, m.Max.X-2, m.Min.Y))
buffer.Fill(horizontalCell, image.Rect(m.Min.X+2, m.Max.Y-2, m.Max.X-2, m.Max.Y))
buffer.Fill(verticalCell, image.Rect(m.Min.X+2, m.Min.Y+1, m.Min.X+3, m.Max.Y-1))
buffer.Fill(verticalCell, image.Rect(m.Max.X-2, m.Min.Y, m.Max.X-3, m.Max.Y))
// draw corners
buffer.SetCell(ui.Cell{ui.TOP_LEFT, m.BorderStyle}, image.Pt(m.Min.X+2, m.Min.Y+1))
buffer.SetCell(ui.Cell{ui.TOP_RIGHT, m.BorderStyle}, image.Pt(m.Max.X-3, m.Min.Y+1))
buffer.SetCell(ui.Cell{ui.BOTTOM_LEFT, m.BorderStyle}, image.Pt(m.Min.X+2, m.Max.Y-2))
buffer.SetCell(ui.Cell{ui.BOTTOM_RIGHT, m.BorderStyle}, image.Pt(m.Max.X-3, m.Max.Y-2))
}
================================================
FILE: component/runchart/grid.go
================================================
package runchart
import (
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/component/util"
"image"
"math"
"time"
)
const defaultValueLength = 4
type chartGrid struct {
timeRange TimeRange
timePerPoint time.Duration
valueExtrema ValueExtrema
linesCount int
maxTimeWidth int
minTimeWidth int
}
func (c *RunChart) newChartGrid() chartGrid {
linesCount := (c.Inner.Max.X - c.Inner.Min.X - c.grid.minTimeWidth) / xAxisGridWidth
timeRange := c.getTimeRange(linesCount)
return chartGrid{
timeRange: timeRange,
timePerPoint: c.timescale / time.Duration(xAxisGridWidth),
valueExtrema: getLocalExtrema(c.lines, timeRange),
linesCount: linesCount,
maxTimeWidth: c.Inner.Max.X,
minTimeWidth: defaultValueLength,
}
}
func (c *RunChart) renderAxes(buffer *ui.Buffer) {
// draw y axis labels
if c.grid.valueExtrema.max != c.grid.valueExtrema.min {
labelsCount := (c.Inner.Dy() - xAxisLabelsHeight - 1) / (yAxisLabelsIndent + yAxisLabelsHeight)
valuePerY := (c.grid.valueExtrema.max - c.grid.valueExtrema.min) / float64(c.Inner.Dy()-xAxisLabelsHeight-3)
for i := 0; i < int(labelsCount); i++ {
val := c.grid.valueExtrema.max - (valuePerY * float64(i) * (yAxisLabelsIndent + yAxisLabelsHeight))
fmt := util.FormatValue(val, c.scale)
if len(fmt) > c.grid.minTimeWidth {
c.grid.minTimeWidth = len(fmt)
}
buffer.SetString(
fmt,
ui.NewStyle(c.palette.BaseColor),
image.Pt(c.Inner.Min.X, 1+c.Inner.Min.Y+i*(yAxisLabelsIndent+yAxisLabelsHeight)))
}
} else {
fmt := util.FormatValue(c.grid.valueExtrema.max, c.scale)
c.grid.minTimeWidth = len(fmt)
buffer.SetString(
fmt,
ui.NewStyle(c.palette.BaseColor),
image.Pt(c.Inner.Min.X, c.Inner.Min.Y+c.Inner.Dy()/2))
}
// draw origin cell
buffer.SetCell(
ui.NewCell(ui.BOTTOM_LEFT, ui.NewStyle(c.palette.BaseColor)),
image.Pt(c.Inner.Min.X+c.grid.minTimeWidth, c.Inner.Max.Y-xAxisLabelsHeight-1))
// draw x axis line
for i := c.grid.minTimeWidth + 1; i < c.Inner.Dx(); i++ {
buffer.SetCell(
ui.NewCell(ui.HORIZONTAL_DASH, ui.NewStyle(c.palette.BaseColor)),
image.Pt(i+c.Inner.Min.X, c.Inner.Max.Y-xAxisLabelsHeight-1))
}
// draw grid lines
for y := 0; y < c.Inner.Dy()-xAxisLabelsHeight-2; y = y + 2 {
for x := 1; x <= c.grid.linesCount; x++ {
buffer.SetCell(
ui.NewCell(ui.VERTICAL_DASH, ui.NewStyle(c.palette.MediumColor)),
image.Pt(c.grid.maxTimeWidth-x*xAxisGridWidth, y+c.Inner.Min.Y+1))
}
}
// draw y axis line
for i := 0; i < c.Inner.Dy()-xAxisLabelsHeight-1; i++ {
buffer.SetCell(
ui.NewCell(ui.VERTICAL_DASH, ui.NewStyle(c.palette.BaseColor)),
image.Pt(c.Inner.Min.X+c.grid.minTimeWidth, i+c.Inner.Min.Y))
}
// draw x axis time labels
for i := 1; i <= c.grid.linesCount; i++ {
labelTime := c.grid.timeRange.max.Add(time.Duration(-i) * c.timescale)
buffer.SetString(
labelTime.Format("15:04:05"),
ui.NewStyle(c.palette.BaseColor),
image.Pt(c.grid.maxTimeWidth-xAxisLabelsWidth/2-i*(xAxisGridWidth), c.Inner.Max.Y-1))
}
}
func (c *RunChart) getTimeRange(linesCount int) TimeRange {
if c.mode == ModePinpoint {
return c.grid.timeRange
}
width := time.Duration(c.timescale.Nanoseconds() * int64(linesCount))
max := time.Now()
return TimeRange{
max: max,
min: max.Add(-width),
}
}
func getLocalExtrema(items []TimeLine, timeRange TimeRange) ValueExtrema {
if len(items) == 0 {
return ValueExtrema{0, 0}
}
var max, min = -math.MaxFloat64, math.MaxFloat64
for _, item := range items {
started := false
for i := len(item.points) - 1; i > 0; i-- {
point := item.points[i]
if timeRange.isInRange(point.time) {
started = true
} else if started == true && !timeRange.isInRange(point.time) {
break
}
if point.value > max && timeRange.isInRange(point.time) {
max = point.value
}
if point.value < min && timeRange.isInRange(point.time) {
min = point.value
}
}
}
return ValueExtrema{max: max, min: min}
}
func (r *TimeRange) isInRange(time time.Time) bool {
return time.After(r.min) && time.Before(r.max)
}
================================================
FILE: component/runchart/legend.go
================================================
package runchart
import (
"fmt"
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/component/util"
"image"
"math"
)
const (
xAxisLegendIndent = 10
yAxisLegendIndent = 1
heightOnDefault = 2
heightOnPinpoint = 4
heightOnDetails = 6
timeFormat = "15:04:05.000"
)
type legend struct {
Enabled bool
Details bool
}
func (c *RunChart) renderLegend(buffer *ui.Buffer, rectangle image.Rectangle) {
if !c.legend.Enabled {
return
}
height := heightOnDefault
if c.mode == ModePinpoint {
height = heightOnPinpoint
} else if c.legend.Details {
height = heightOnDetails
}
rowCount := (c.Dy() - 2*yAxisLegendIndent) / (height + yAxisLegendIndent)
columnCount := int(math.Ceil(float64(len(c.lines)) / float64(rowCount)))
columnWidth := getColumnWidth(c.mode, c.lines, c.scale)
for col := 0; col < columnCount; col++ {
for row := 0; row < rowCount; row++ {
lineIndex := row + rowCount*col
if len(c.lines) <= lineIndex {
break
}
line := c.lines[row+rowCount*col]
x := c.Inner.Max.X - (columnWidth+xAxisLegendIndent)*(col+1)
y := c.Inner.Min.Y + yAxisLegendIndent + row*height
titleStyle := ui.NewStyle(line.color)
detailsStyle := ui.NewStyle(c.palette.BaseColor)
buffer.SetString(string(ui.DOT), titleStyle, image.Pt(x-2, y))
buffer.SetString(line.label, titleStyle, image.Pt(x, y))
if c.mode == ModePinpoint {
buffer.SetString(fmt.Sprintf("time %s", line.selectionPoint.time.Format("15:04:05.000")), detailsStyle, image.Pt(x, y+1))
buffer.SetString(fmt.Sprintf("value %s", util.FormatValue(line.selectionPoint.value, c.scale)), detailsStyle, image.Pt(x, y+2))
continue
}
if !c.legend.Details {
continue
}
details := [4]string{
fmt.Sprintf("cur %s", util.FormatValue(getCurrentValue(line), c.scale)),
fmt.Sprintf("dlt %s", util.FormatDelta(getDiffWithPreviousValue(line), c.scale)),
fmt.Sprintf("max %s", util.FormatValue(line.extrema.max, c.scale)),
fmt.Sprintf("min %s", util.FormatValue(line.extrema.min, c.scale)),
}
for i, detail := range details {
buffer.SetString(detail, detailsStyle, image.Pt(x, y+i+yAxisLegendIndent))
}
}
}
}
func getColumnWidth(mode Mode, lines []TimeLine, scale int) int {
if mode == ModePinpoint {
return len(timeFormat)
}
width := len(util.FormatValue(0, scale))
for _, line := range lines {
if len(line.label) > width {
width = len(line.label)
}
}
return width
}
func getDiffWithPreviousValue(line TimeLine) float64 {
if len(line.points) < 2 {
return 0
}
return line.points[len(line.points)-1].value - line.points[len(line.points)-2].value
}
func getCurrentValue(line TimeLine) float64 {
if len(line.points) == 0 {
return 0
}
return line.points[len(line.points)-1].value
}
================================================
FILE: component/runchart/runchart.go
================================================
package runchart
import (
"github.com/sqshq/sampler/component"
"github.com/sqshq/sampler/component/util"
"github.com/sqshq/sampler/config"
"github.com/sqshq/sampler/console"
"github.com/sqshq/sampler/data"
"image"
"math"
"sync"
"time"
ui "github.com/gizak/termui/v3"
)
const (
xAxisGridWidth = xAxisLabelsIndent + xAxisLabelsWidth
xAxisLabelsHeight = 1
xAxisLabelsWidth = 8
xAxisLabelsIndent = 2
yAxisLabelsHeight = 1
yAxisLabelsIndent = 1
historyReserveMin = 2
xBrailleMultiplier = 2
yBrailleMultiplier = 4
)
type Mode int
const (
ModeDefault Mode = 0
ModePinpoint Mode = 1
)
const (
CommandDisableSelection = "DISABLE_SELECTION"
CommandMoveSelection = "MOVE_SELECTION"
)
// RunChart displays observed data in a time sequence
type RunChart struct {
*ui.Block
*data.Consumer
lines []TimeLine
grid chartGrid
timescale time.Duration
mutex *sync.Mutex
mode Mode
selection time.Time
scale int
legend legend
palette console.Palette
}
type TimePoint struct {
value float64
time time.Time
coordinate int
}
type TimeLine struct {
points []TimePoint
extrema ValueExtrema
color ui.Color
label string
selectionCoordinate int
selectionPoint TimePoint
}
type TimeRange struct {
max time.Time
min time.Time
}
type ValueExtrema struct {
max float64
min float64
}
func NewRunChart(c config.RunChartConfig, palette console.Palette) *RunChart {
chart := RunChart{
Block: component.NewBlock(c.Title, true, palette),
Consumer: data.NewConsumer(),
lines: []TimeLine{},
timescale: calculateTimescale(*c.RateMs),
mutex: &sync.Mutex{},
scale: *c.Scale,
mode: ModeDefault,
legend: legend{Enabled: c.Legend.Enabled, Details: c.Legend.Details},
palette: palette,
}
for _, i := range c.Items {
chart.AddLine(*i.Label, *i.Color)
}
go func() {
for {
select {
case sample := <-chart.SampleChannel:
chart.consumeSample(sample)
case alert := <-chart.AlertChannel:
chart.Alert = alert
case command := <-chart.CommandChannel:
switch command.Type {
case CommandDisableSelection:
chart.disableSelection()
case CommandMoveSelection:
chart.moveSelection(command.Value.(int))
}
}
}
}()
return &chart
}
func (c *RunChart) newTimePoint(value float64) TimePoint {
now := time.Now()
return TimePoint{
value: value,
time: now,
coordinate: c.calculateTimeCoordinate(now),
}
}
func (c *RunChart) Draw(buffer *ui.Buffer) {
c.mutex.Lock()
c.Block.Draw(buffer)
c.grid = c.newChartGrid()
drawArea := image.Rect(
c.Inner.Min.X+c.grid.minTimeWidth+2, c.Inner.Min.Y,
c.Inner.Max.X, c.Inner.Max.Y-xAxisLabelsHeight-1,
)
c.renderAxes(buffer)
c.renderLines(buffer, drawArea)
c.renderLegend(buffer, drawArea)
component.RenderAlert(c.Alert, c.Rectangle, buffer)
c.mutex.Unlock()
}
func (c *RunChart) AddLine(Label string, color ui.Color) {
line := TimeLine{
points: []TimePoint{},
color: color,
label: Label,
extrema: ValueExtrema{max: -math.MaxFloat64, min: math.MaxFloat64},
}
c.lines = append(c.lines, line)
}
func (c *RunChart) consumeSample(sample *data.Sample) {
float, err := util.ParseFloat(sample.Value)
if err != nil {
c.HandleConsumeFailure("Failed to parse a number", err, sample)
return
}
c.HandleConsumeSuccess()
c.mutex.Lock()
index := -1
for i, line := range c.lines {
if line.label == sample.Label {
index = i
}
}
line := c.lines[index]
if float < line.extrema.min {
line.extrema.min = float
}
if float > line.extrema.max {
line.extrema.max = float
}
line.points = append(line.points, c.newTimePoint(float))
c.lines[index] = line
if len(line.points)%100 == 0 {
c.trimOutOfRangeValues()
}
c.mutex.Unlock()
}
func (c *RunChart) renderLines(buffer *ui.Buffer, drawArea image.Rectangle) {
canvas := ui.NewCanvas()
canvas.Rectangle = drawArea
if len(c.lines) == 0 || len(c.lines[0].points) == 0 {
return
}
selectionCoordinate := c.calculateTimeCoordinate(c.selection)
selectionPoints := make(map[int]image.Point)
probe := c.lines[0].points[0]
probeCalculatedCoordinate := c.calculateTimeCoordinate(probe.time)
delta := probe.coordinate - probeCalculatedCoordinate
for i, line := range c.lines {
xPoint := make(map[int]image.Point)
xOrder := make([]int, 0)
// move selection on a delta, if it was instantiated after cursor move
if line.selectionCoordinate != 0 {
line.selectionCoordinate -= delta
c.lines[i].selectionCoordinate = line.selectionCoordinate
}
for j, timePoint := range line.points {
timePoint.coordinate -= delta
line.points[j] = timePoint
var y int
if c.grid.valueExtrema.max == c.grid.valueExtrema.min {
y = (drawArea.Dy() - 2) / 2
} else {
valuePerY := (c.grid.valueExtrema.max - c.grid.valueExtrema.min) / float64(drawArea.Dy()-2)
y = int(float64(timePoint.value-c.grid.valueExtrema.min) / valuePerY)
}
point := image.Pt(timePoint.coordinate, drawArea.Max.Y-y-1)
if _, exists := xPoint[point.X]; exists {
continue
}
if !point.In(drawArea) {
continue
}
if line.selectionCoordinate == 0 {
// instantiate selection coordinate as the closest point to the cursor time
if len(line.points) > j+1 && ui.AbsInt(timePoint.coordinate-selectionCoordinate) > ui.AbsInt(line.points[j+1].coordinate-selectionCoordinate) {
selectionPoints[i] = point
c.lines[i].selectionPoint = timePoint
}
} else if timePoint.coordinate == line.selectionCoordinate {
selectionPoints[i] = point
}
xPoint[point.X] = point
xOrder = append(xOrder, point.X)
}
for i, x := range xOrder {
currentPoint := xPoint[x]
var previousPoint image.Point
if i == 0 {
previousPoint = currentPoint
} else {
previousPoint = xPoint[xOrder[i-1]]
}
canvas.SetLine(
braillePoint(previousPoint),
braillePoint(currentPoint),
line.color,
)
}
}
canvas.Draw(buffer)
if c.mode == ModePinpoint {
for lineIndex, point := range selectionPoints {
buffer.SetCell(ui.NewCell(console.SymbolSelection, ui.NewStyle(c.lines[lineIndex].color)), point)
if c.lines[lineIndex].selectionCoordinate == 0 {
c.lines[lineIndex].selectionCoordinate = point.X
}
}
}
}
func (c *RunChart) trimOutOfRangeValues() {
minRangeTime := c.grid.timeRange.min.Add(-time.Minute * time.Duration(historyReserveMin))
for i, item := range c.lines {
lastOutOfRangeValueIndex := -1
for j, point := range item.points {
if point.time.Before(minRangeTime) {
lastOutOfRangeValueIndex = j
}
}
if lastOutOfRangeValueIndex > 0 {
item.points = append(item.points[:0], item.points[lastOutOfRangeValueIndex+1:]...)
c.lines[i] = item
}
}
}
func (c *RunChart) calculateTimeCoordinate(t time.Time) int {
timeDeltaWithGridMaxTime := c.grid.timeRange.max.Sub(t).Nanoseconds()
timeDeltaToPaddingRelation := float64(timeDeltaWithGridMaxTime) / float64(c.timescale.Nanoseconds())
return c.grid.maxTimeWidth - int(math.Ceil(float64(xAxisGridWidth)*timeDeltaToPaddingRelation))
}
func (c *RunChart) moveSelection(shift int) {
if c.mode == ModeDefault {
c.mode = ModePinpoint
c.selection = getMidRangeTime(c.grid.timeRange)
return
}
c.selection = c.selection.Add(c.grid.timePerPoint * time.Duration(shift))
if c.selection.After(c.grid.timeRange.max) {
c.selection = c.grid.timeRange.max
} else if c.selection.Before(c.grid.timeRange.min) {
c.selection = c.grid.timeRange.min
}
for i := range c.lines {
c.lines[i].selectionCoordinate = 0
}
}
func (c *RunChart) disableSelection() {
if c.mode == ModePinpoint {
c.mode = ModeDefault
return
}
}
func getMidRangeTime(r TimeRange) time.Time {
delta := r.max.Sub(r.min)
return r.max.Add(-delta / 2)
}
// time duration between grid lines
func calculateTimescale(rateMs int) time.Duration {
multiplier := rateMs * xAxisGridWidth / 2
timescale := time.Duration(time.Millisecond * time.Duration(multiplier)).Round(time.Second)
if timescale.Seconds() == 0 {
return time.Second
}
return timescale
}
func braillePoint(point image.Point) image.Point {
return image.Point{X: point.X * xBrailleMultiplier, Y: point.Y * yBrailleMultiplier}
}
================================================
FILE: component/sparkline/sparkline.go
================================================
package sparkline
import (
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/component"
"github.com/sqshq/sampler/component/util"
"github.com/sqshq/sampler/config"
"github.com/sqshq/sampler/console"
"github.com/sqshq/sampler/data"
"image"
"sync"
)
// SparkLine displays general shape of a measurement variation over time
type SparkLine struct {
*ui.Block
*data.Consumer
values []float64
maxValue float64
minValue float64
scale int
gradient []ui.Color
palette console.Palette
mutex *sync.Mutex
}
func NewSparkLine(c config.SparkLineConfig, palette console.Palette) *SparkLine {
line := &SparkLine{
Block: component.NewBlock(c.Title, true, palette),
Consumer: data.NewConsumer(),
values: []float64{},
scale: *c.Scale,
gradient: *c.Gradient,
palette: palette,
mutex: &sync.Mutex{},
}
go func() {
for {
select {
case sample := <-line.SampleChannel:
line.consumeSample(sample)
case alert := <-line.AlertChannel:
line.Alert = alert
}
}
}()
return line
}
func (s *SparkLine) consumeSample(sample *data.Sample) {
float, err := util.ParseFloat(sample.Value)
if err != nil {
s.HandleConsumeFailure("Failed to parse a number", err, sample)
return
}
s.HandleConsumeSuccess()
s.values = append(s.values, float)
max, min := s.values[0], s.values[0]
for i := len(s.values) - 1; i >= 0; i-- {
if len(s.values)-i > s.Dx() {
break
}
if s.values[i] > max {
max = s.values[i]
}
if s.values[i] < min {
min = s.values[i]
}
}
s.maxValue = max
s.minValue = min
if len(s.values)%100 == 0 {
s.mutex.Lock()
s.trimOutOfRangeValues(s.Dx())
s.mutex.Unlock()
}
}
func (s *SparkLine) trimOutOfRangeValues(maxSize int) {
if maxSize < len(s.values) {
s.values = append(s.values[:0], s.values[len(s.values)-maxSize:]...)
}
}
func (s *SparkLine) Draw(buffer *ui.Buffer) {
s.mutex.Lock()
textStyle := ui.NewStyle(s.palette.BaseColor)
height := s.Dy() - 2
minValue := util.FormatValue(s.minValue, s.scale)
maxValue := util.FormatValue(s.maxValue, s.scale)
curValue := util.FormatValue(0, s.scale)
if len(s.values) > 0 {
curValue = util.FormatValue(s.values[len(s.values)-1], s.scale)
}
indent := 2 + util.Max([]int{
len(minValue), len(maxValue), len(curValue),
})
for i := len(s.values) - 1; i >= 0; i-- {
n := len(s.values) - i
if n > s.Dx()-indent-3 {
break
}
top := 0
if s.maxValue != s.minValue {
top = int((s.values[i] - s.minValue) * float64(height) / (s.maxValue - s.minValue))
}
for j := 0; j <= top; j++ {
buffer.SetCell(ui.NewCell(console.SymbolVerticalBar, ui.NewStyle(console.GetGradientColor(s.gradient, j, height))), image.Pt(s.Inner.Max.X-n-indent, s.Inner.Max.Y-j-1))
}
if i == len(s.values)-1 {
buffer.SetString(curValue, textStyle, image.Pt(s.Inner.Max.X-n-indent+2, s.Inner.Max.Y-top-1))
if s.maxValue != s.minValue {
buffer.SetString(minValue, textStyle, image.Pt(s.Inner.Max.X-n-indent+2, s.Max.Y-2))
buffer.SetString(maxValue, textStyle, image.Pt(s.Inner.Max.X-n-indent+2, s.Min.Y+1))
}
}
}
s.mutex.Unlock()
s.Block.Draw(buffer)
component.RenderAlert(s.Alert, s.Rectangle, buffer)
}
================================================
FILE: component/sparkline/sparkline_test.go
================================================
package sparkline
import (
"testing"
)
func TestSparkLine_trimOutOfRangeValues(t *testing.T) {
type Sparkline struct {
maxSize int
expectedSize int
values []float64
}
tests := []struct {
name string
sparkline Sparkline
}{
{"should trimOutOfRangeValues values to the max size", Sparkline{maxSize: 5, expectedSize: 5, values: []float64{1, 2, 3, 4, 5, 6, 7, 8}}},
{"should not trimOutOfRangeValues values if max size is bigger than values len", Sparkline{maxSize: 5, expectedSize: 3, values: []float64{1, 2, 3}}},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
s := &SparkLine{
values: tt.sparkline.values,
}
s.trimOutOfRangeValues(tt.sparkline.maxSize)
if len(s.values) != tt.sparkline.expectedSize {
t.Errorf("Values size after trimOutOfRangeValues is %v, but needed to be %v", len(s.values), tt.sparkline.expectedSize)
}
})
}
}
================================================
FILE: component/statusbar.go
================================================
package component
import (
"fmt"
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/console"
"image"
)
const (
pauseText = " P A U S E D "
bindingsIndent = 3
)
type StatusBar struct {
*ui.Block
keyBindings []string
text string
pause bool
}
func NewStatusBar(configFileName string, palette console.Palette) *StatusBar {
block := *ui.NewBlock()
block.Border = false
text := fmt.Sprintf(" %s %s @ %s", console.AppTitle, console.AppVersion, configFileName)
return &StatusBar{
Block: NewBlock("", false, palette),
text: text,
keyBindings: []string{
"(q) quit",
"(p) pause",
"(<->) selection",
"(ESC) reset alerts",
},
}
}
func (s *StatusBar) Draw(buffer *ui.Buffer) {
buffer.Fill(ui.NewCell(' ', ui.NewStyle(console.ColorClear, console.GetMenuColorReverse())), s.GetRect())
indent := bindingsIndent
for _, binding := range s.keyBindings {
buffer.SetString(binding, ui.NewStyle(console.GetMenuColor(), console.GetMenuColorReverse()), image.Pt(s.Max.X-len(binding)-indent, s.Min.Y))
indent += bindingsIndent + len(binding)
}
buffer.SetString(s.text, ui.NewStyle(console.GetMenuColor(), console.GetMenuColorReverse()), s.Min)
if s.pause {
buffer.SetString(pauseText, ui.NewStyle(console.GetMenuColorReverse(), console.GetMenuColor()), image.Pt(s.Max.X-s.Dx()/2-len(pauseText)/2, s.Min.Y))
}
s.Block.Draw(buffer)
}
func (s *StatusBar) TogglePause() {
s.pause = !s.pause
}
================================================
FILE: component/textbox/textbox.go
================================================
package textbox
import (
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/component"
"github.com/sqshq/sampler/config"
"github.com/sqshq/sampler/console"
"github.com/sqshq/sampler/data"
"image"
)
// TextBox represents a component with regular text
type TextBox struct {
*ui.Block
*data.Consumer
alert *data.Alert
text string
border bool
style ui.Style
}
func NewTextBox(c config.TextBoxConfig, palette console.Palette) *TextBox {
color := c.Color
if color == nil {
color = &palette.BaseColor
}
box := TextBox{
Block: component.NewBlock(c.Title, *c.Border, palette),
Consumer: data.NewConsumer(),
style: ui.NewStyle(*color),
}
go func() {
for {
select {
case sample := <-box.SampleChannel:
box.text = sample.Value
case alert := <-box.AlertChannel:
box.alert = alert
}
}
}()
return &box
}
func (t *TextBox) Draw(buffer *ui.Buffer) {
t.Block.Draw(buffer)
cells := ui.ParseStyles(t.text, ui.Theme.Paragraph.Text)
cells = ui.WrapCells(cells, uint(t.Inner.Dx()-2))
rows := ui.SplitCells(cells, '\n')
for y, row := range rows {
if y+t.Inner.Min.Y >= t.Inner.Max.Y-1 {
break
}
row = ui.TrimCells(row, t.Inner.Dx()-2)
for _, cx := range ui.BuildCellWithXArray(row) {
x, cell := cx.X, cx.Cell
cell.Style = t.style
buffer.SetCell(cell, image.Pt(x+1, y+1).Add(t.Inner.Min))
}
}
component.RenderAlert(t.alert, t.Rectangle, buffer)
}
================================================
FILE: component/util/format.go
================================================
package util
import (
"bytes"
"fmt"
ui "github.com/gizak/termui/v3"
"image"
"math"
"strconv"
"strings"
)
var AsciiLogo = []string{
" __ ",
" _________ ____ ___ ____ / /__ _____",
" / ___/ __ `/ __ `__ \\/ __ \\/ / _ \\/ ___/",
" (__ ) /_/ / / / / / / /_/ / / __/ / ",
"/____/\\__,_/_/ /_/ /_/ .___/_/\\___/_/ ",
" /_/ ",
}
func FormatValue(value float64, scale int) string {
if math.Abs(value) == math.MaxFloat64 {
return "Inf"
}
return formatTrailingDigits(addRadixChars(value), scale)
}
func FormatDelta(value float64, scale int) string {
abs := math.Abs(value)
val := value
scl := scale
postfix := ""
if abs > 1000 && abs < 1000000 {
val = float64(value) / 1000
postfix = "k"
} else if abs > 1000000 && abs < 1000000000 {
val = float64(value) / 1000000
postfix = "M"
} else if abs > 1000000000 {
val = float64(value) / 1000000000
postfix = "B"
}
if abs > 1000 {
scl = 1
}
if val == 0 {
return " 0"
} else if val > 0 {
return fmt.Sprintf("+%s%s", FormatValue(val, scl), postfix)
} else {
return fmt.Sprintf("%s%s", FormatValue(val, scl), postfix)
}
}
func addRadixChars(value float64) string {
buf := &bytes.Buffer{}
if value < 0 {
buf.Write([]byte{'-'})
value = 0 - value
}
radix := []byte{','}
parts := strings.Split(strconv.FormatFloat(value, 'f', -1, 64), ".")
pos := 0
if len(parts[0])%3 != 0 {
pos += len(parts[0]) % 3
buf.WriteString(parts[0][:pos])
buf.Write(radix)
}
for ; pos < len(parts[0]); pos += 3 {
buf.WriteString(parts[0][pos : pos+3])
buf.Write(radix)
}
buf.Truncate(buf.Len() - 1)
if len(parts) > 1 {
buf.Write([]byte{'.'})
buf.WriteString(parts[1])
}
return buf.String()
}
func formatTrailingDigits(value string, scale int) string {
if i := strings.Index(value, "."); i >= 0 {
formatted := value
if scale <= 0 {
formatted = value[:i]
}
i++
if i+scale < len(value) {
formatted = value[:i+scale]
}
formatted = strings.TrimRight(formatted, "0")
return strings.TrimRight(formatted, ".")
}
return value
}
func GetMiddlePoint(rectangle image.Rectangle, text string, offset int) image.Point {
return image.Pt(rectangle.Min.X+rectangle.Dx()/2-len(text)/2, rectangle.Max.Y-rectangle.Dy()/2+offset)
}
func PrintString(s string, style ui.Style, p image.Point, buffer *ui.Buffer) {
for i, char := range s {
buffer.SetCell(ui.Cell{Rune: char, Style: style}, image.Pt(p.X+i, p.Y))
}
}
================================================
FILE: component/util/format_test.go
================================================
package util
import "testing"
func TestFormatValue(t *testing.T) {
type args struct {
value float64
scale int
}
tests := []struct {
name string
args args
want string
}{
{"should format float value with scale = 1", args{94.123, 1}, "94.1"},
{"should format float value with scale = 0", args{94.123, 0}, "94"},
{"should format float value with trailing zeros", args{94.100, 5}, "94.1"},
{"should format float value with radix char and trailing zeros", args{9423000.00123, 2}, "9,423,000"},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := FormatValue(tt.args.value, tt.args.scale); got != tt.want {
t.Errorf("FormatValue() = %v, want %v", got, tt.want)
}
})
}
}
================================================
FILE: component/util/geometry.go
================================================
package util
import (
"image"
)
func GetRectLeftSideCenter(rect image.Rectangle) image.Point {
return image.Point{
X: rect.Min.X,
Y: rect.Min.Y + rect.Dy()/2,
}
}
func GetRectRightSideCenter(rect image.Rectangle) image.Point {
return image.Point{
X: rect.Max.X,
Y: rect.Min.Y + rect.Dy()/2,
}
}
func GetRectTopSideCenter(rect image.Rectangle) image.Point {
return image.Point{
X: rect.Min.X + rect.Dx()/2,
Y: rect.Min.Y,
}
}
func GetRectBottomSideCenter(rect image.Rectangle) image.Point {
return image.Point{
X: rect.Min.X + rect.Dx()/2,
Y: rect.Max.Y,
}
}
func GetRectCoordinates(area image.Rectangle, width int, height int) (int, int, int, int) {
x1 := area.Min.X + area.Dx()/2 - width/2
y1 := area.Min.Y + area.Dy()/2 - height
return x1, y1, x1 + width, y1 + height + 2
}
================================================
FILE: component/util/geometry_test.go
================================================
package util
import "testing"
import "image"
func TestGetRectLeftSideCenter(t *testing.T) {
rect := image.Rect(10, 10, 20, 20)
expected := image.Point{
X: 10,
Y: 15,
}
result := GetRectLeftSideCenter(rect)
if result != expected {
t.Errorf("GetRectLeftSideCenter was incorrect. Expected %v, got %v.", expected, result)
}
}
func TestGetRectRightSideCenter(t *testing.T) {
rect := image.Rect(10, 10, 20, 21)
expected := image.Point{
X: 20,
Y: 15,
}
result := GetRectRightSideCenter(rect)
if result != expected {
t.Errorf("GetRectRightSideCenter was incorrect. Expected %v, got %v.", expected, result)
}
}
func TestGetRectTopSideCenter(t *testing.T) {
rect := image.Rect(10, 10, 20, 20)
expected := image.Point{
X: 15,
Y: 10,
}
result := GetRectTopSideCenter(rect)
if result != expected {
t.Errorf("GetRectTopSideCenter was incorrect. Expected %v, got %v.", expected, result)
}
}
func TestGetRectBottomSideCenter(t *testing.T) {
rect := image.Rect(10, 9, 20, 20)
expected := image.Point{
X: 15,
Y: 20,
}
result := GetRectBottomSideCenter(rect)
if result != expected {
t.Errorf("GetRectBottomSideCenter was incorrect. Expected %v, got %v.", expected, result)
}
}
================================================
FILE: component/util/math.go
================================================
package util
func Max(numbers []int) int {
max := numbers[0]
for _, n := range numbers {
if n > max {
max = n
}
}
return max
}
================================================
FILE: component/util/parse.go
================================================
package util
import (
"strconv"
"strings"
)
func ParseFloat(input string) (float64, error) {
clean := strings.TrimSpace(input)
clean = strings.Replace(clean, ",", ".", -1) // replace decimal comma with decimal point
if strings.Contains(clean, "\n") {
lastIndex := strings.LastIndex(clean, "\n")
clean = clean[lastIndex+1:]
}
return strconv.ParseFloat(clean, 64)
}
================================================
FILE: component/util/parse_test.go
================================================
package util
import "testing"
func TestParseFloat(t *testing.T) {
type args struct {
input string
}
tests := []struct {
name string
args args
want float64
wantErr bool
}{
{"should parse a regular number", args{"123"}, 123, false},
{"should parse a float with decimal point", args{"123.456"}, 123.456, false},
{"should parse a float with decimal comma", args{"123,456"}, 123.456, false},
{"should parse a regular number with spaces, tabs and line breaks", args{" \t 123 \t \n "}, 123, false},
{"should parse a last line in the given string", args{"123\n456"}, 456, false},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := ParseFloat(tt.args.input)
if (err != nil) != tt.wantErr {
t.Errorf("ParseFloat() error = %v, wantErr %v", err, tt.wantErr)
return
}
if got != tt.want {
t.Errorf("ParseFloat() = %v, want %v", got, tt.want)
}
})
}
}
================================================
FILE: config/arrangement.go
================================================
package config
import (
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/console"
"image"
)
func (c *Config) setDefaultArrangement() {
components := getComponents(c)
if allHaveNoPosition(components) {
setSingleComponentPosition(components[0])
}
for _, component := range components {
if component.Position == nil || len(component.Position) == 0 {
lc := getLargestComponent(components)
le := getLargestEmptySpaceRectangle(components)
if getSquare(lc) > le.Dx()*le.Dy()*2 {
arrangeIntoLargestComponent(component, lc)
} else {
arrangeIntoLargestEmptySpace(component, le)
}
}
}
}
func arrangeIntoLargestComponent(component *ComponentConfig, lc *ComponentConfig) {
lr := lc.GetRectangle()
var w, h, ws, hs int
if lr.Dx()/2 > lr.Dy() {
w = lr.Dx() / 2
h = lr.Dy()
ws = w
hs = 0
} else {
w = lr.Dx()
h = lr.Dy() / 2
ws = 0
hs = h
}
component.Position = [][]int{
{lr.Min.X + ws, lr.Min.Y + hs},
{w, h},
}
lc.Position = [][]int{
{lr.Min.X, lr.Min.Y},
{w, h},
}
}
func arrangeIntoLargestEmptySpace(component *ComponentConfig, le image.Rectangle) {
component.Position = [][]int{
{le.Min.X, le.Min.Y},
{le.Dx(), le.Dy()},
}
}
func allHaveNoPosition(components []*ComponentConfig) bool {
for _, component := range components {
if component.Position != nil {
return false
}
}
return true
}
func getLargestComponent(components []*ComponentConfig) *ComponentConfig {
largestComponent := components[0]
for _, component := range components {
if getSquare(component) > getSquare(largestComponent) {
largestComponent = component
}
}
return largestComponent
}
func getSquare(c *ComponentConfig) int {
r := c.GetRectangle()
return r.Dx() * r.Dy()
}
func getComponents(c *Config) []*ComponentConfig {
var components []*ComponentConfig
for i := range c.RunCharts {
components = append(components, &c.RunCharts[i].ComponentConfig)
}
for i := range c.BarCharts {
components = append(components, &c.BarCharts[i].ComponentConfig)
}
for i := range c.Gauges {
components = append(components, &c.Gauges[i].ComponentConfig)
}
for i := range c.SparkLines {
components = append(components, &c.SparkLines[i].ComponentConfig)
}
for i := range c.AsciiBoxes {
components = append(components, &c.AsciiBoxes[i].ComponentConfig)
}
for i := range c.TextBoxes {
components = append(components, &c.TextBoxes[i].ComponentConfig)
}
return components
}
func setSingleComponentPosition(c *ComponentConfig) {
w := int(console.ColumnsCount)
h := int(console.RowsCount * 0.6)
c.Position = [][]int{
{(console.ColumnsCount - w) / 2, (console.RowsCount - h) / 2},
{w, h},
}
}
func getLargestEmptySpaceRectangle(components []*ComponentConfig) image.Rectangle {
grid := [console.RowsCount][console.ColumnsCount]int{}
for _, component := range components {
rect := component.GetRectangle()
for r := ui.MinInt(console.RowsCount, rect.Min.Y); r < ui.MinInt(console.RowsCount, rect.Max.Y); r++ {
for c := ui.MinInt(console.ColumnsCount, rect.Min.X); c < ui.MinInt(console.ColumnsCount, rect.Max.X); c++ {
grid[r][c] = 1
}
}
}
mr := image.ZR
for row := 0; row < console.RowsCount; row++ {
histogram := createHistogram(grid, row)
r := calcMaxRectangle(histogram, row)
if r.Dx()*r.Dy() > mr.Dx()*mr.Dy() {
mr = r
}
}
return mr
}
func calcMaxRectangle(histogram [console.ColumnsCount]int, row int) image.Rectangle {
maxRectangle := image.ZR
maxArea := 0
for i := 0; i < len(histogram); i++ {
height := histogram[i]
if height > maxArea {
maxArea = height
maxRectangle = image.Rect(i, row, i, row+height)
}
for j := i - 1; j >= 0; j-- {
width := i - j + 1
height = ui.MinInt(height, histogram[j])
if width*height > maxArea {
maxArea = width * height
maxRectangle = image.Rect(j, row, j+width, row+height)
}
}
}
return maxRectangle
}
func createHistogram(grid [console.RowsCount][console.ColumnsCount]int, row int) [console.ColumnsCount]int {
histogram := [console.ColumnsCount]int{}
for column := 0; column < console.ColumnsCount; column++ {
histogram[column] = countEmptyCellsBelow(grid, row, column)
}
return histogram
}
func countEmptyCellsBelow(grid [console.RowsCount][console.ColumnsCount]int, row int, column int) int {
count := 0
for r := row; r < console.RowsCount; r++ {
if grid[r][column] == 1 {
return count
}
count++
}
return count
}
================================================
FILE: config/component.go
================================================
package config
import (
ui "github.com/gizak/termui/v3"
"github.com/sqshq/sampler/console"
"image"
)
type ComponentType rune
const (
TypeRunChart ComponentType = 0
TypeBarChart ComponentType = 1
TypeSparkLine ComponentType = 2
TypeTextBox ComponentType = 3
TypeAsciiBox ComponentType = 4
TypeGauge ComponentType = 5
)
type ComponentConfig struct {
Title string `yaml:"title"`
Position [][]int `yaml:"position,flow"`
RateMs *int `yaml:"rate-ms,omitempty"`
Triggers []TriggerConfig `yaml:"triggers,omitempty"`
Type ComponentType `yaml:",omitempty"`
}
func (c *ComponentConfig) GetLocation() Location {
return Location{X: c.Position[0][0], Y: c.Position[0][1]}
}
func (c *ComponentConfig) GetSize() Size {
return Size{X: c.Position[1][0], Y: c.Position[1][1]}
}
func (c *ComponentConfig) GetRectangle() image.Rectangle {
if c.Position == nil || len(c.Position) == 0 {
return image.ZR
}
return image.Rect(
c.Position[0][0],
c.Position[0][1],
c.Position[0][0]+c.Position[1][0],
c.Position[0][1]+c.Position[1][1])
}
type TriggerConfig struct {
Title string `yaml:"title"`
Condition string `yaml:"condition"`
Actions *ActionsConfig `yaml:"actions,omitempty"`
}
type ActionsConfig struct {
TerminalBell *bool `yaml:"terminal-bell,omitempty"`
Sound *bool `yaml:"sound,omitempty"`
Visual *bool `yaml:"visual,omitempty"`
Script *string `yaml:"script,omitempty"`
}
type GaugeConfig struct {
ComponentConfig `yaml:",inline"`
Scale *int `yaml:"scale,omitempty"`
Color *ui.Color `yaml:"color,omitempty"`
PercentOnly *bool `yaml:"percent-only,omitempty"`
Cur Item `yaml:"cur"`
Max Item `yaml:"max"`
Min Item `yaml:"min"`
}
type SparkLineConfig struct {
ComponentConfig `yaml:",inline"`
Scale *int `yaml:"scale,omitempty"`
Item Item `yaml:",inline"`
Gradient *[]ui.Color `yaml:",omitempty"`
}
type BarChartConfig struct {
ComponentConfig `yaml:",inline"`
Scale *int `yaml:"scale,omitempty"`
Items []Item `yaml:"items"`
}
type AsciiBoxConfig struct {
ComponentConfig `yaml:",inline"`
Item `yaml:",inline"`
Border *bool `yaml:"border,omitempty"`
Font *console.AsciiFont `yaml:"font,omitempty"`
}
type TextBoxConfig struct {
ComponentConfig `yaml:",inline"`
Item `yaml:",inline"`
Border *bool `yaml:"border,omitempty"`
}
type RunChartConfig struct {
ComponentConfig `yaml:",inline"`
Legend *LegendConfig `yaml:"legend,omitempty"`
Scale *int `yaml:"scale,omitempty"`
Items []Item `yaml:"items"`
}
type LegendConfig struct {
Enabled bool `yaml:"enabled"`
Details bool `yaml:"details"`
}
type Item struct {
Label *string `yaml:"label,omitempty"`
Color *ui.Color `yaml:"color,omitempty"`
Pty *bool `yaml:"pty,omitempty"`
InitScript *string `yaml:"init,omitempty"`
MultiStepInitScript *[]string `yaml:"multistep-init,omitempty"`
SampleScript *string `yaml:"sample"`
TransformScript *string `yaml:"transform,omitempty"`
}
type Location struct {
X int
Y int
}
type Size struct {
X int
Y int
}
type ComponentSettings struct {
Type ComponentType
Title string
Size Size
Location Location
}
func getPosition(location Location, size Size) [][]int {
return [][]int{
{location.X, location.Y},
{size.X, size.Y},
}
}
================================================
FILE: config/config.go
================================================
package config
import (
"fmt"
"github.com/jessevdk/go-flags"
"github.com/sqshq/sampler/console"
"gopkg.in/yaml.v3"
"io/ioutil"
"log"
"os"
)
type Config struct {
Theme *console.Theme `yaml:"theme,omitempty"`
Variables map[string]string `yaml:"variables,omitempty"`
RunCharts []RunChartConfig `yaml:"runcharts,omitempty"`
BarCharts []BarChartConfig `yaml:"barcharts,omitempty"`
Gauges []GaugeConfig `yaml:"gauges,omitempty"`
SparkLines []SparkLineConfig `yaml:"sparklines,omitempty"`
TextBoxes []TextBoxConfig `yaml:"textboxes,omitempty"`
AsciiBoxes []AsciiBoxConfig `yaml:"asciiboxes,omitempty"`
}
func LoadConfig() (*Config, Options) {
var opt Options
_, err := flags.Parse(&opt)
if err != nil {
console.Exit("")
}
if opt.Version == true {
console.Exit(console.AppVersion)
}
if opt.ConfigFile == nil {
console.Exit("Please specify config file using --config flag. Example: sampler --config example.yml")
}
cfg := readFile(opt.ConfigFile)
cfg.validate()
cfg.setDefaults()
return cfg, opt
}
func Update(settings []ComponentSettings, options Options) {
cfg := readFile(options.ConfigFile)
for _, s := range settings {
componentConfig := cfg.findComponent(s.Type, s.Title)
componentConfig.Position = getPosition(s.Location, s.Size)
}
saveFile(cfg, options.ConfigFile)
}
func (c *Config) findComponent(componentType ComponentType, componentTitle string) *ComponentConfig {
switch componentType {
case TypeRunChart:
for i, component := range c.RunCharts {
if component.Title == componentTitle {
return &c.RunCharts[i].ComponentConfig
}
}
case TypeBarChart:
for i, component := range c.BarCharts {
if component.Title == componentTitle {
return &c.BarCharts[i].ComponentConfig
}
}
case TypeGauge:
for i, component := range c.Gauges {
if component.Title == componentTitle {
return &c.Gauges[i].ComponentConfig
}
}
case TypeSparkLine:
for i, component := range c.SparkLines {
if component.Title == componentTitle {
return &c.SparkLines[i].ComponentConfig
}
}
case TypeAsciiBox:
for i, component := range c.AsciiBoxes {
if component.Title == componentTitle {
return &c.AsciiBoxes[i].ComponentConfig
}
}
case TypeTextBox:
for i, component := range c.TextBoxes {
if component.Title == componentTitle {
return &c.TextBoxes[i].ComponentConfig
}
}
}
panic(fmt.Sprintf(
"Failed to find component type %v with title %v", componentType, componentTitle))
}
func readFile(location *string) *Config {
yamlFile, err := ioutil.ReadFile(*location)
if err != nil {
log.Fatalf("Failed to read config file: %s", *location)
}
cfg := new(Config)
err = yaml.Unmarshal(yamlFile, cfg)
if err != nil {
log.Fatalf("Failed to read config file: %v", err)
}
return cfg
}
func saveFile(config *Config, fileName *string) {
file, err := yaml.Marshal(config)
if err != nil {
log.Fatalf("Failed to marshal config file: %v", err)
}
err = ioutil.WriteFile(*fileName, file, os.ModePerm)
if err != nil {
log.Fatalf("Failed to save config file: %v", err)
}
}
================================================
FILE: config/default.go
================================================
package config
import (
"github.com/sqshq/sampler/console"
)
const (
defaultRateMs = 1000
defaultScale = 1
defaultTheme = console.ThemeDark
)
func (c *Config) setDefaults() {
c.setDefaultValues()
c.setDefaultItemSettings()
c.setDefaultArrangement()
}
func (c *Config) setDefaultValues() {
if c.Theme == nil {
t := defaultTheme
c.Theme = &t
}
for i, chart := range c.RunCharts {
setDefaultTriggersValues(chart.Triggers)
chart.ComponentConfig.Type = TypeRunChart
if chart.RateMs == nil {
r := defaultRateMs
chart.RateMs = &r
}
if chart.Scale == nil {
p := defaultScale
chart.Scale = &p
}
if chart.Legend == nil {
chart.Legend = &LegendConfig{true, true}
c.RunCharts[i] = chart
}
c.RunCharts[i] = chart
}
for i, line := range c.SparkLines {
setDefaultTriggersValues(line.Triggers)
line.ComponentConfig.Type = TypeSparkLine
line.Item.Label = &line.Title
if line.RateMs == nil {
r := defaultRateMs
line.RateMs = &r
}
if line.Scale == nil {
p := defaultScale
line.Scale = &p
}
c.SparkLines[i] = line
}
for i, chart := range c.BarCharts {
setDefaultTriggersValues(chart.Triggers)
chart.ComponentConfig.Type = TypeBarChart
if chart.RateMs == nil {
r := defaultRateMs
chart.RateMs = &r
}
if chart.Scale == nil {
p := defaultScale
chart.Scale = &p
}
c.BarCharts[i] = chart
}
for i, g := range c.Gauges {
setDefaultTriggersValues(g.Triggers)
g.ComponentConfig.Type = TypeGauge
if g.RateMs == nil {
r := defaultRateMs
g.RateMs = &r
}
if g.Scale == nil {
p := defaultScale
g.Scale = &p
}
cur := "cur"
max := "max"
min := "min"
g.Cur.Label = &cur
g.Max.Label = &max
g.Min.Label = &min
c.Gauges[i] = g
}
for i, box := range c.AsciiBoxes {
setDefaultTriggersValues(box.Triggers)
box.ComponentConfig.Type = TypeAsciiBox
if box.RateMs == nil {
r := defaultRateMs
box.RateMs = &r
}
if box.Label == nil {
label := box.Title
box.Label = &label
}
if box.Font == nil {
font := console.AsciiFont2D
box.Font = &font
}
if box.Border == nil {
border := true
box.Border = &border
}
c.AsciiBoxes[i] = box
}
for i, box := range c.TextBoxes {
setDefaultTriggersValues(box.Triggers)
box.ComponentConfig.Type = TypeTextBox
if box.RateMs == nil {
r := defaultRateMs
box.RateMs = &r
}
if box.Label == nil {
label := box.Title
box.Label = &label
}
if box.Border == nil {
border := true
box.Border = &border
}
c.TextBoxes[i] = box
}
}
func setDefaultTriggersValues(triggers []TriggerConfig) {
defaultTerminalBell := false
defaultSound := false
defaultVisual := false
for i, trigger := range triggers {
if trigger.Actions == nil {
trigger.Actions = &ActionsConfig{TerminalBell: &defaultTerminalBell, Sound: &defaultSound, Visual: &defaultVisual, Script: nil}
} else {
if trigger.Actions.TerminalBell == nil {
trigger.Actions.TerminalBell = &defaultTerminalBell
}
if trigger.Actions.Sound == nil {
trigger.Actions.Sound = &defaultSound
}
if trigger.Actions.Visual == nil {
trigger.Actions.Visual = &defaultVisual
}
}
triggers[i] = trigger
}
}
func (c *Config) setDefaultItemSettings() {
palette := console.GetPalette(*c.Theme)
colorsCount := len(palette.ContentColors)
defaultPty := false
defaultPercentOnly := false
for _, ch := range c.RunCharts {
for j, item := range ch.Items {
if item.Color == nil {
item.Color = &palette.ContentColors[j%colorsCount]
}
if item.Pty == nil {
item.Pty = &defaultPty
}
ch.Items[j] = item
}
}
for _, b := range c.BarCharts {
for j, item := range b.Items {
if item.Color == nil {
item.Color = &palette.ContentColors[j%colorsCount]
}
if item.Pty == nil {
item.Pty = &defaultPty
}
b.Items[j] = item
}
}
for i, s := range c.SparkLines {
s.Gradient = &palette.GradientColors[i%(len(palette.GradientColors))]
if s.Item.Pty == nil {
s.Item.Pty = &defaultPty
}
c.SparkLines[i] = s
}
for i, g := range c.Gauges {
if g.Min.Pty == nil {
g.Min.Pty = &defaultPty
}
if g.Max.Pty == nil {
g.Max.Pty = &defaultPty
}
if g.Cur.Pty == nil {
g.Cur.Pty = &defaultPty
}
if g.Color == nil {
g.Color = &palette.ContentColors[i%colorsCount]
}
if g.PercentOnly == nil {
g.PercentOnly = &defaultPercentOnly
}
c.Gauges[i] = g
}
for i, a := range c.AsciiBoxes {
if a.Item.Pty == nil {
a.Item.Pty = &defaultPty
}
c.AsciiBoxes[i] = a
}
for i, t := range c.TextBoxes {
if t.Item.Pty == nil {
t.Item.Pty = &defaultPty
}
c.TextBoxes[i] = t
}
}
================================================
FILE: config/options.go
================================================
package config
// Options with cli flags
type Options struct {
ConfigFile *string `short:"c" long:"config" description:"Path to YAML config file"`
Environment []string `short:"e" long:"env" description:"Specify name=value variable to use in script placeholder as $name. This flag takes precedence over the same name variables, specified in config yml"`
Version bool `short:"v" long:"version" description:"Print version"`
}
================================================
FILE: config/validator.go
================================================
package config
import (
"fmt"
"github.com/sqshq/sampler/console"
)
func (c *Config) validate() {
var components []ComponentConfig
for _, c := range c.RunCharts {
components = append(components, c.ComponentConfig)
validateLabelsUniqueness(c.Title, c.Items)
validateItemsScripts(c.Title, c.Items)
}
for _, c := range c.BarCharts {
components = append(components, c.ComponentConfig)
validateLabelsUniqueness(c.Title, c.Items)
validateItemsScripts(c.Title, c.Items)
}
for _, c := range c.SparkLines {
components = append(components, c.ComponentConfig)
validateItemScripts(c.Title, c.Item)
}
for _, c := range c.Gauges {
components = append(components, c.ComponentConfig)
validateItemScripts(c.Title, c.Min)
validateItemScripts(c.Title, c.Max)
validateItemScripts(c.Title, c.Cur)
}
for _, c := range c.AsciiBoxes {
components = append(components, c.ComponentConfig)
validateItemScripts(c.Title, c.Item)
}
for _, c := range c.TextBoxes {
components = append(components, c.ComponentConfig)
validateItemScripts(c.Title, c.Item)
}
validateTitlesUniqueness(components)
}
func validateItemsScripts(title string, items []Item) {
for _, i := range items {
validateItemScripts(title, i)
}
}
func validateItemScripts(title string, i Item) {
if i.InitScript != nil && i.MultiStepInitScript != nil {
console.Exit(fmt.Sprintf("Config validation error: both init and multistep-init scripts are not allowed for '%s'", title))
}
if i.SampleScript == nil {
console.Exit(fmt.Sprintf("Config validation error: sample script should be specified for '%s'", title))
}
}
func validateLabelsUniqueness(title string, items []Item) {
labels := make(map[string]bool)
for _, i := range items {
label := *i.Label
if _, contains := labels[label]; contains {
console.Exit(fmt.Sprintf("Config validation error: item labels should be unique. Please rename '%s' for '%s'", label, title))
}
labels[label] = true
}
}
func validateTitlesUniqueness(components []ComponentConfig) {
titles := make(map[string]bool)
for _, c := range components {
if _, contains := titles[c.Title]; contains {
console.Exit(fmt.Sprintf("Config validation error: component titles should be unique. Please rename '%s'", c.Title))
}
titles[c.Title] = true
}
}
================================================
FILE: console/console.go
================================================
package console
import (
"fmt"
"log"
"os"
"time"
ui "github.com/gizak/termui/v3"
)
const (
MaxRenderInterval = 1000 * time.Millisecond
MinRenderInterval = 100 * time.Millisecond
ColumnsCount = 80
RowsCount = 40
AppTitle = "sampler"
AppVersion = "1.1.0"
)
const (
BellCharacter = "\a"
)
type AsciiFont string
const (
AsciiFont2D AsciiFont = "2d"
AsciiFont3D AsciiFont = "3d"
)
func Init() {
fmt.Printf("\033]0;%s\007", AppTitle)
if err := ui.Init(); err != nil {
log.Fatalf("Failed to initialize ui: %v", err)
}
}
// Close function calls Close from termui package,
// which closes termbox-go
func Close() {
ui.Close()
}
// Exit function exits the program successfully
func Exit(message string) {
if len(message) > 0 {
println(message)
}
os.Exit(0)
}
================================================
FILE: console/palette.go
================================================
package console
import (
"fmt"
"runtime"
ui "github.com/gizak/termui/v3"
)
type Theme string
const (
ThemeDark Theme = "dark"
ThemeLight Theme = "light"
)
const (
ColorOlive ui.Color = 178
ColorDeepSkyBlue ui.Color = 39
ColorDeepPink ui.Color = 198
ColorCian ui.Color = 43
ColorOrange ui.Color = 166
ColorPurple ui.Color = 129
ColorGreen ui.Color = 64
ColorDarkRed ui.Color = 88
ColorBlueViolet ui.Color = 57
ColorDarkGrey ui.Color = 238
ColorLightGrey ui.Color = 254
ColorGrey ui.Color = 242
ColorWhite ui.Color = 15
ColorBlack ui.Color = 0
ColorClear ui.Color = -1
)
const (
menuColorNix ui.Color = 255
menuColorReverseNix ui.Color = 235
menuColorWindows ui.Color = 255
menuColorReverseWindows ui.Color = 0
)
type Palette struct {
ContentColors []ui.Color
GradientColors [][]ui.Color
BaseColor ui.Color
MediumColor ui.Color
ReverseColor ui.Color
}
// GetPalette returns a color palette based on specified theme
func GetPalette(theme Theme) Palette {
switch theme {
case ThemeDark:
return Palette{
ContentColors: []ui.Color{ColorOlive, ColorDeepSkyBlue, ColorDeepPink, ColorWhite, ColorGrey, ColorGreen, ColorOrange, ColorCian, ColorPurple},
GradientColors: [][]ui.Color{{39, 33, 62, 93, 164, 161}, {95, 138, 180, 179, 178, 178}},
BaseColor: ColorWhite,
MediumColor: ColorDarkGrey,
ReverseColor: ColorBlack,
}
case ThemeLight:
return Palette{
ContentColors: []ui.Color{ColorBlack, ColorDarkRed, ColorBlueViolet, ColorGrey, ColorGreen},
GradientColors: [][]ui.Color{{250, 248, 246, 244, 242, 240, 238, 236, 234, 232, 16}},
BaseColor: ColorBlack,
MediumColor: ColorLightGrey,
ReverseColor: ColorWhite,
}
default:
panic(fmt.Sprintf("Specified theme is not supported: %v", theme))
}
}
// GetMenuColor returns a color based on the
// operating system target
func GetMenuColor() ui.Color {
switch runtime.GOOS {
case "windows":
return menuColorWindows
default:
return menuColorNix
}
}
// GetMenuColorReverse returns a color based on the
// operating system target
func GetMenuColorReverse() ui.Color {
switch runtime.GOOS {
case "windows":
return menuColorReverseWindows
default:
return menuColorReverseNix
}
}
func GetGradientColor(gradient []ui.Color, cur int, max int) ui.Color {
ratio := float64(len(gradient)) / float64(max)
index := int(ratio * float64(cur))
if index > len(gradient)-1 {
index = len(gradient) - 1
}
return gradient[index]
}
================================================
FILE: console/palette_test.go
================================================
package console
import (
"testing"
ui "github.com/gizak/termui/v3"
)
func TestGetPalette(t *testing.T) {
var (
darkPalette = Palette{
BaseColor: ColorWhite,
ReverseColor: ColorBlack,
}
lightPalette = Palette{
BaseColor: ColorBlack,
ReverseColor: ColorWhite,
}
)
tests := []struct {
name string
input Theme
Palette
}{
{"should return dark theme with base color white", ThemeDark, darkPalette},
{"should return light theme with base color black", ThemeLight, lightPalette},
}
for _, test := range tests {
palette := GetPalette(test.input)
if got := palette.BaseColor; got != test.BaseColor {
t.Errorf("GetPalette(%q) = %d, want %d", test.input, got, test.BaseColor)
}
}
}
func TestGetPaletteInvalidTheme(t *testing.T) {
const invalid Theme = "invalid"
defer func() {
if r := recover(); r == nil {
t.Errorf("GetPalette(%q) should have panicked", invalid)
}
}()
GetPalette(invalid)
}
func TestGetGradientColor(t *testing.T) {
type args struct {
gradient []ui.Color
cur int
max int
}
var (
lightThemeGradientInput = args{
gradient: []ui.Color{
250, 248, 246, 244, 242, 240, 238, 236, 234, 232, 16,
},
cur: 200,
max: 250,
}
darkThemeGradientInput = args{
gradient: []ui.Color{
39, 33, 62, 93, 164, 161,
},
cur: 40,
max: 180,
}
grey ui.Color = 234
blue ui.Color = 33
)
tests := []struct {
name string
args
want ui.Color
}{
{"should return color grey", lightThemeGradientInput, grey},
{"should return color blue", darkThemeGradientInput, blue},
}
for _, test := range tests {
gradientColor := GetGradientColor(
test.gradient,
test.cur,
test.max,
)
if got := gradientColor; got != test.want {
t.Errorf("GetGradientColor(%v) = %d, want %d", test.args, got, test.want)
}
}
}
================================================
FILE: console/signal.go
================================================
package console
const (
SignalResize = "<Resize>"
SignalClick = "<MouseLeft>"
)
const (
KeyPause1 = "p"
KeyPause2 = "P"
KeyQuit1 = "q"
KeyQuit2 = "Q"
KeyQuit3 = "<C-c>"
KeyLeft = "<Left>"
KeyRight = "<Right>"
KeyUp = "<Up>"
KeyDown = "<Down>"
KeyEnter = "<Enter>"
KeyEsc = "<Escape>"
)
================================================
FILE: console/symbol.go
================================================
package console
const (
SymbolSelection rune = '▲'
SymbolVerticalBar rune = '▎'
SymbolHorizontalBar rune = '═'
)
================================================
FILE: data/consumer.go
================================================
package data
import (
ui "github.com/gizak/termui/v3"
"strings"
)
type Consumer struct {
SampleChannel chan *Sample
AlertChannel chan *Alert
CommandChannel chan *Command
Alert *Alert
}
func (c *Consumer) HandleConsumeSuccess() {
if c.Alert != nil && c.Alert.Recoverable {
c.Alert = nil
}
}
func (c *Consumer) HandleConsumeFailure(title string, err error, sample *Sample) {
c.AlertChannel <- &Alert{
Title: strings.ToUpper(title),
Text: err.Error(),
Color: sample.Color,
Recoverable: true,
}
}
type Sample struct {
Label string
Value string
Color *ui.Color
}
type Alert struct {
Title string
Text string
Color *ui.Color
Recoverable bool
}
type Command struct {
Type string
Value interface{}
}
func NewConsumer() *Consumer {
return &Consumer{
SampleChannel: make(chan *Sample, 10),
AlertChannel: make(chan *Alert, 10),
CommandChannel: make(chan *Command, 10),
}
}
================================================
FILE: data/consumer_test.go
================================================
package data
import (
"errors"
"reflect"
"testing"
)
func TestConsumer_HandleConsumeSuccess(t *testing.T) {
tests := []struct {
name string
existingAlert *Alert
expectedAlert *Alert
}{
{"alert nil", nil, nil},
{"alert present, not recoverable", &Alert{Recoverable: false}, &Alert{Recoverable: false}},
{"alert present, recoverable", &Alert{Recoverable: true}, nil},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c := NewConsumer()
c.Alert = tt.existingAlert
c.HandleConsumeSuccess()
if !reflect.DeepEqual(c.Alert, tt.expectedAlert) {
t.Errorf("unexpected alert state after HandleConsumeSuccess(), want %v, got %v", tt.expectedAlert, c.Alert)
}
})
}
}
func TestConsumer_HandleConsumeFailure(t *testing.T) {
tests := []struct {
name string
title string
err error
sample *Sample
want *Alert
}{
{
"basic",
"test",
errors.New("test"),
&Sample{
Label: "test",
Value: "test",
Color: nil,
},
&Alert{
Title: "TEST",
Text: "test",
Color: nil,
Recoverable: true,
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
c := NewConsumer()
c.HandleConsumeFailure(tt.title, tt.err, tt.sample)
got := <-c.AlertChannel
if !reflect.DeepEqual(tt.want, got) {
t.Errorf("unexpected alert state after HandleConsumeFailure(), want %v, got %v", got, tt.want)
}
})
}
}
func TestNewConsumer(t *testing.T) {
tests := []struct {
name string
checkFunc func(c *Consumer) bool
}{
{
"initialized after creation",
func(c *Consumer) bool {
return c != nil
},
},
{
"alert is nil after creation",
func(c *Consumer) bool {
return c.Alert == nil
},
},
{
"command channel is initialized after creation",
func(c *Consumer) bool {
return c.CommandChannel != nil
},
},
{
"alert channel is initialized after creation",
func(c *Consumer) bool {
return c.AlertChannel != nil
},
},
{
"sample channel is initialized after creation",
func(c *Consumer) bool {
return c.SampleChannel != nil
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := NewConsumer(); !tt.checkFunc(got) {
t.Errorf("unexpected consumer state after NewConsumer() = %v", got)
}
})
}
}
================================================
FILE: data/error.go
================================================
package data
import (
"fmt"
"os/exec"
)
func getErrorMessage(err error) string {
exitErr, ok := err.(*exec.ExitError)
message := err.Error()
if ok {
stderr := string(exitErr.Stderr)
if len(stderr) != 0 {
message = fmt.Sprintf("%.200s", stderr)
}
}
return message
}
================================================
FILE: data/int.go
================================================
package data
import "time"
const (
startupTimeout = 200 * time.Millisecond
minAwaitTimeout = 100 * time.Millisecond
maxAwaitTimeout = 1 * time.Second
)
type InteractiveShell interface {
init() error
execute() (string, error)
}
================================================
FILE: data/int_basic.go
================================================
package data
import (
"bufio"
"errors"
"fmt"
"github.com/lunixbochs/vtclean"
"io"
"os/exec"
"strings"
"time"
)
// BasicInteractiveShell represents non-PTY interactive shell sampling metadata
type BasicInteractiveShell struct {
item *Item
variables []string
stdoutCh chan string
stderrCh chan string
stdin io.WriteCloser
cmd *exec.Cmd
errCount int
timeout time.Duration
}
func (s *BasicInteractiveShell) init() error {
cmd := exec.Command("sh", "-c", s.item.initScripts[0])
enrichEnvVariables(cmd, s.variables)
stdout, err := cmd.StdoutPipe()
if err != nil {
return err
}
stderr, err := cmd.StderrPipe()
if err != nil {
return err
}
stdin, err := cmd.StdinPipe()
if err != nil {
return err
}
stdoutScanner := bufio.NewScanner(stdout)
stderrScanner := bufio.NewScanner(stderr)
stdoutCh := make(chan string)
stderrCh := make(chan string)
go func() {
for stdoutScanner.Scan() {
stdoutCh <- stdoutScanner.Text()
stderrCh <- stderrScanner.Text()
}
}()
s.stdoutCh = stdoutCh
s.stderrCh = stderrCh
s.stdin = stdin
s.cmd = cmd
err = cmd.Start()
if err != nil {
return err
}
for i := 1; i < len(s.item.initScripts); i++ {
_, err := io.WriteString(s.stdin, fmt.Sprintf(" %s\n", s.item.initScripts[i]))
if err != nil {
return err
}
time.Sleep(startupTimeout) // TODO wait until cmd complete
}
return nil
}
func (s *BasicInteractiveShell) execute() (string, error) {
if s.stdin == nil {
return "", nil
}
_, err := io.WriteString(s.stdin, fmt.Sprintf(" %s\n", s.item.sampleScript))
if err != nil {
s.errCount++
if s.errCount > errorThreshold {
_ = s.cmd.Wait()
s.item.basicShell = nil // restart session
}
return "", fmt.Errorf("failed to execute command: %s", err)
}
timeout := make(chan bool, 1)
go func() {
time.Sleep(s.timeout)
timeout <- true
}()
var resultText strings.Builder
var errorText strings.Builder
for {
select {
case stdout := <-s.stdoutCh:
if len(stdout) > 0 {
resultText.WriteString(stdout)
resultText.WriteString("\n")
}
case stderr := <-s.stderrCh:
if len(stderr) > 0 {
errorText.WriteString(stderr)
errorText.WriteString("\n")
}
case <-timeout:
if errorText.Len() > 0 {
return "", errors.New(errorText.String())
}
return s.item.transform(vtclean.Clean(resultText.String(), false))
}
}
}
================================================
FILE: data/int_pty.go
================================================
//+build !windows
package data
import (
"bufio"
"fmt"
"github.com/kr/pty"
"github.com/lunixbochs/vtclean"
"io"
"os/exec"
"strings"
"time"
)
// PtyInteractiveShell represents PTY interactive shell sampling metadata
type PtyInteractiveShell struct {
item *Item
variables []string
cmd *exec.Cmd
file io.WriteCloser
ch chan string
errCount int
timeout time.Duration
}
func (s *PtyInteractiveShell) init() error {
cmd := exec.Command("sh", "-c", s.item.initScripts[0])
enrichEnvVariables(cmd, s.variables)
file, err := pty.Start(cmd)
if err != nil {
return err
}
scanner := bufio.NewScanner(file)
channel := make(chan string)
go func() {
for scanner.Scan() {
channel <- scanner.Text()
}
}()
s.cmd = cmd
s.file = file
s.ch = channel
_, err = file.Read(make([]byte, 4096))
if err != nil {
return err
}
time.Sleep(startupTimeout)
for i := 1; i < len(s.item.initScripts); i++ {
_, err = io.WriteString(s.file, fmt.Sprintf(" %s\n", s.item.initScripts[i]))
if err != nil {
return err
}
time.Sleep(startupTimeout) // TODO wait until cmd complete
}
return nil
}
func (s *PtyInteractiveShell) execute() (string, error) {
_, err := io.WriteString(s.file, fmt.Sprintf(" %s\n", s.item.sampleScript))
if err != nil {
s.errCount++
if s.errCount > errorThreshold {
_ = s.cmd.Wait()
_ = s.file.Close()
s.item.ptyShell = nil // restart session
}
return "", fmt.Errorf("failed to execute command: %s", err)
}
softTimeout := make(chan bool, 1)
hardTimeout := make(chan bool, 1)
go func() {
time.Sleep(s.getAwaitT
gitextract_kb9i7998/ ├── .github/ │ └── FUNDING.yml ├── .gitignore ├── .travis.yml ├── Dockerfile ├── LICENSE.md ├── README.md ├── asset/ │ ├── bindata.go │ ├── file.go │ └── player.go ├── component/ │ ├── alert.go │ ├── asciibox/ │ │ └── asciibox.go │ ├── barchart/ │ │ └── barchart.go │ ├── block.go │ ├── component.go │ ├── gauge/ │ │ ├── gauge.go │ │ └── gauge_test.go │ ├── layout/ │ │ └── layout.go │ ├── menu.go │ ├── runchart/ │ │ ├── grid.go │ │ ├── legend.go │ │ └── runchart.go │ ├── sparkline/ │ │ ├── sparkline.go │ │ └── sparkline_test.go │ ├── statusbar.go │ ├── textbox/ │ │ └── textbox.go │ └── util/ │ ├── format.go │ ├── format_test.go │ ├── geometry.go │ ├── geometry_test.go │ ├── math.go │ ├── parse.go │ └── parse_test.go ├── config/ │ ├── arrangement.go │ ├── component.go │ ├── config.go │ ├── default.go │ ├── options.go │ └── validator.go ├── console/ │ ├── console.go │ ├── palette.go │ ├── palette_test.go │ ├── signal.go │ └── symbol.go ├── data/ │ ├── consumer.go │ ├── consumer_test.go │ ├── error.go │ ├── int.go │ ├── int_basic.go │ ├── int_pty.go │ ├── int_pty_windows.go │ ├── item.go │ ├── sampler.go │ └── trigger.go ├── event/ │ └── handler.go ├── example.yml ├── go.mod ├── go.sum └── main.go
SYMBOL INDEX (375 symbols across 49 files)
FILE: asset/bindata.go
function bindataRead (line 20) | func bindataRead(data []byte, name string) ([]byte, error) {
type asset (line 40) | type asset struct
type bindataFileInfo (line 45) | type bindataFileInfo struct
method Name (line 52) | func (fi bindataFileInfo) Name() string {
method Size (line 55) | func (fi bindataFileInfo) Size() int64 {
method Mode (line 58) | func (fi bindataFileInfo) Mode() os.FileMode {
method ModTime (line 61) | func (fi bindataFileInfo) ModTime() time.Time {
method IsDir (line 64) | func (fi bindataFileInfo) IsDir() bool {
method Sys (line 67) | func (fi bindataFileInfo) Sys() interface{} {
function data3dFlfBytes (line 73) | func data3dFlfBytes() ([]byte, error) {
function data3dFlf (line 80) | func data3dFlf() (*asset, error) {
function data2dFlfBytes (line 93) | func data2dFlfBytes() ([]byte, error) {
function data2dFlf (line 100) | func data2dFlf() (*asset, error) {
function dataQuindarToneMp3Bytes (line 113) | func dataQuindarToneMp3Bytes() ([]byte, error) {
function dataQuindarToneMp3 (line 120) | func dataQuindarToneMp3() (*asset, error) {
function Asset (line 134) | func Asset(name string) ([]byte, error) {
function MustAsset (line 148) | func MustAsset(name string) []byte {
function AssetInfo (line 160) | func AssetInfo(name string) (os.FileInfo, error) {
function AssetNames (line 173) | func AssetNames() []string {
function AssetDir (line 201) | func AssetDir(name string) ([]string, error) {
type bintree (line 223) | type bintree struct
function RestoreAsset (line 237) | func RestoreAsset(dir, name string) error {
function RestoreAssets (line 262) | func RestoreAssets(dir, name string) error {
function _filePath (line 278) | func _filePath(dir, name string) string {
FILE: asset/file.go
type AssetFile (line 8) | type AssetFile struct
method Read (line 16) | func (a AssetFile) Read(p []byte) (n int, err error) {
method Close (line 20) | func (a AssetFile) Close() error {
function NewAssetFile (line 12) | func NewAssetFile(data []byte) AssetFile {
FILE: asset/player.go
type AudioPlayer (line 10) | type AudioPlayer struct
method Beep (line 37) | func (a *AudioPlayer) Beep() {
method Close (line 49) | func (a *AudioPlayer) Close() {
function NewAudioPlayer (line 15) | func NewAudioPlayer() *AudioPlayer {
FILE: component/alert.go
function RenderAlert (line 13) | func RenderAlert(alert *data.Alert, area image.Rectangle, buffer *ui.Buf...
FILE: component/asciibox/asciibox.go
type AsciiBox (line 16) | type AsciiBox struct
method renderText (line 70) | func (a *AsciiBox) renderText(sample *data.Sample) {
method Draw (line 80) | func (a *AsciiBox) Draw(buffer *ui.Buffer) {
constant asciiFontExtension (line 27) | asciiFontExtension = ".flf"
function NewAsciiBox (line 29) | func NewAsciiBox(c config.AsciiBoxConfig, palette console.Palette) *Asci...
FILE: component/barchart/barchart.go
constant barIndent (line 17) | barIndent int = 1
type BarChart (line 21) | type BarChart struct
method consumeSample (line 67) | func (b *BarChart) consumeSample(sample *data.Sample) {
method addBar (line 102) | func (b *BarChart) addBar(label string, color ui.Color) {
method reselectMaxValue (line 106) | func (b *BarChart) reselectMaxValue() {
method Draw (line 117) | func (b *BarChart) Draw(buffer *ui.Buffer) {
type bar (line 31) | type bar struct
function NewBarChart (line 38) | func NewBarChart(c config.BarChartConfig, palette console.Palette) *BarC...
FILE: component/block.go
function NewBlock (line 9) | func NewBlock(title string, border bool, palette console.Palette) *ui.Bl...
FILE: component/component.go
type Component (line 9) | type Component struct
method Move (line 31) | func (c *Component) Move(x, y int) {
method Resize (line 37) | func (c *Component) Resize(x, y int) {
method normalize (line 43) | func (c *Component) normalize() {
function NewComponent (line 19) | func NewComponent(dbl ui.Drawable, cmr *data.Consumer, cfg config.Compon...
FILE: component/gauge/gauge.go
constant MinValueLabel (line 15) | MinValueLabel = "min"
constant MaxValueLabel (line 16) | MaxValueLabel = "max"
constant CurValueLabel (line 17) | CurValueLabel = "cur"
type Gauge (line 21) | type Gauge struct
method ConsumeSample (line 58) | func (g *Gauge) ConsumeSample(sample *data.Sample) {
method Draw (line 81) | func (g *Gauge) Draw(buffer *ui.Buffer) {
function NewGauge (line 33) | func NewGauge(c config.GaugeConfig, palette console.Palette) *Gauge {
function calculatePercent (line 122) | func calculatePercent(g *Gauge) float64 {
FILE: component/gauge/gauge_test.go
function Test_calculatePercent (line 5) | func Test_calculatePercent(t *testing.T) {
FILE: component/layout/layout.go
type Layout (line 17) | type Layout struct
method AddComponent (line 66) | func (l *Layout) AddComponent(cpt *component.Component) {
method StartWithIntro (line 70) | func (l *Layout) StartWithIntro() {
method changeMode (line 74) | func (l *Layout) changeMode(m Mode) {
method HandleMouseClick (line 82) | func (l *Layout) HandleMouseClick(x int, y int) {
method HandleKeyboardEvent (line 97) | func (l *Layout) HandleKeyboardEvent(e string) {
method ChangeDimensions (line 223) | func (l *Layout) ChangeDimensions(width, height int) {
method getComponent (line 227) | func (l *Layout) getComponent(i int) *component.Component {
method getSelection (line 231) | func (l *Layout) getSelection() *component.Component {
method moveSelection (line 235) | func (l *Layout) moveSelection(direction string) {
method Draw (line 298) | func (l *Layout) Draw(buffer *ui.Buffer) {
method findComponentAtPoint (line 320) | func (l *Layout) findComponentAtPoint(point image.Point) (*component.C...
method resetAlerts (line 358) | func (l *Layout) resetAlerts() {
method WerePositionsChanged (line 364) | func (l *Layout) WerePositionsChanged() bool {
type Mode (line 29) | type Mode
constant ModeDefault (line 32) | ModeDefault Mode = 0
constant ModeIntro (line 33) | ModeIntro Mode = 1
constant ModePause (line 34) | ModePause Mode = 2
constant ModeComponentSelect (line 35) | ModeComponentSelect Mode = 3
constant ModeMenuOptionSelect (line 36) | ModeMenuOptionSelect Mode = 4
constant ModeComponentMove (line 37) | ModeComponentMove Mode = 5
constant ModeComponentResize (line 38) | ModeComponentResize Mode = 6
constant ModeChartPinpoint (line 39) | ModeChartPinpoint Mode = 7
constant minDimension (line 43) | minDimension = 3
constant statusbarHeight (line 44) | statusbarHeight = 1
function NewLayout (line 47) | func NewLayout(statusline *component.StatusBar, menu *component.Menu) *L...
function calculateComponentCoordinates (line 337) | func calculateComponentCoordinates(c *component.Component, columnWidth f...
FILE: component/menu.go
type Menu (line 11) | type Menu struct
method GetSelectedOption (line 52) | func (m *Menu) GetSelectedOption() menuOption {
method Highlight (line 56) | func (m *Menu) Highlight(component *Component) {
method Choose (line 63) | func (m *Menu) Choose() {
method Idle (line 67) | func (m *Menu) Idle() {
method Up (line 71) | func (m *Menu) Up() {
method Down (line 83) | func (m *Menu) Down() {
method MoveOrResize (line 95) | func (m *Menu) MoveOrResize() {
method Draw (line 99) | func (m *Menu) Draw(buffer *ui.Buffer) {
method renderHighlight (line 124) | func (m *Menu) renderHighlight(buffer *ui.Buffer) {
method renderMoveAndResize (line 159) | func (m *Menu) renderMoveAndResize(buffer *ui.Buffer) {
method printAllDirectionsArrowSign (line 172) | func (m *Menu) printAllDirectionsArrowSign(buffer *ui.Buffer, y int) {
method renderOptions (line 190) | func (m *Menu) renderOptions(buffer *ui.Buffer) {
method updateDimensions (line 211) | func (m *Menu) updateDimensions() {
method drawInnerBorder (line 216) | func (m *Menu) drawInnerBorder(buffer *ui.Buffer) {
type menuMode (line 20) | type menuMode
constant menuModeIdle (line 23) | menuModeIdle menuMode = 0
constant menuModeHighlight (line 24) | menuModeHighlight menuMode = 1
constant menuModeOptionSelect (line 25) | menuModeOptionSelect menuMode = 2
constant menuModeMoveAndResize (line 26) | menuModeMoveAndResize menuMode = 3
type menuOption (line 29) | type menuOption
constant MenuOptionMove (line 32) | MenuOptionMove menuOption = "MOVE"
constant MenuOptionResize (line 33) | MenuOptionResize menuOption = "RESIZE"
constant MenuOptionPinpoint (line 34) | MenuOptionPinpoint menuOption = "PINPOINT"
constant MenuOptionResume (line 35) | MenuOptionResume menuOption = "RESUME"
constant minimalMenuHeight (line 39) | minimalMenuHeight = 8
function NewMenu (line 42) | func NewMenu(palette console.Palette) *Menu {
FILE: component/runchart/grid.go
constant defaultValueLength (line 11) | defaultValueLength = 4
type chartGrid (line 13) | type chartGrid struct
method newChartGrid (line 22) | func (c *RunChart) newChartGrid() chartGrid {
method renderAxes (line 37) | func (c *RunChart) renderAxes(buffer *ui.Buffer) {
method getTimeRange (line 101) | func (c *RunChart) getTimeRange(linesCount int) TimeRange {
function getLocalExtrema (line 116) | func getLocalExtrema(items []TimeLine, timeRange TimeRange) ValueExtrema {
method isInRange (line 145) | func (r *TimeRange) isInRange(time time.Time) bool {
FILE: component/runchart/legend.go
constant xAxisLegendIndent (line 12) | xAxisLegendIndent = 10
constant yAxisLegendIndent (line 13) | yAxisLegendIndent = 1
constant heightOnDefault (line 14) | heightOnDefault = 2
constant heightOnPinpoint (line 15) | heightOnPinpoint = 4
constant heightOnDetails (line 16) | heightOnDetails = 6
constant timeFormat (line 18) | timeFormat = "15:04:05.000"
type legend (line 21) | type legend struct
method renderLegend (line 26) | func (c *RunChart) renderLegend(buffer *ui.Buffer, rectangle image.Recta...
function getColumnWidth (line 87) | func getColumnWidth(mode Mode, lines []TimeLine, scale int) int {
function getDiffWithPreviousValue (line 102) | func getDiffWithPreviousValue(line TimeLine) float64 {
function getCurrentValue (line 109) | func getCurrentValue(line TimeLine) float64 {
FILE: component/runchart/runchart.go
constant xAxisGridWidth (line 18) | xAxisGridWidth = xAxisLabelsIndent + xAxisLabelsWidth
constant xAxisLabelsHeight (line 19) | xAxisLabelsHeight = 1
constant xAxisLabelsWidth (line 20) | xAxisLabelsWidth = 8
constant xAxisLabelsIndent (line 21) | xAxisLabelsIndent = 2
constant yAxisLabelsHeight (line 22) | yAxisLabelsHeight = 1
constant yAxisLabelsIndent (line 23) | yAxisLabelsIndent = 1
constant historyReserveMin (line 24) | historyReserveMin = 2
constant xBrailleMultiplier (line 25) | xBrailleMultiplier = 2
constant yBrailleMultiplier (line 26) | yBrailleMultiplier = 4
type Mode (line 29) | type Mode
constant ModeDefault (line 32) | ModeDefault Mode = 0
constant ModePinpoint (line 33) | ModePinpoint Mode = 1
constant CommandDisableSelection (line 37) | CommandDisableSelection = "DISABLE_SELECTION"
constant CommandMoveSelection (line 38) | CommandMoveSelection = "MOVE_SELECTION"
type RunChart (line 42) | type RunChart struct
method newTimePoint (line 120) | func (c *RunChart) newTimePoint(value float64) TimePoint {
method Draw (line 129) | func (c *RunChart) Draw(buffer *ui.Buffer) {
method AddLine (line 147) | func (c *RunChart) AddLine(Label string, color ui.Color) {
method consumeSample (line 157) | func (c *RunChart) consumeSample(sample *data.Sample) {
method renderLines (line 195) | func (c *RunChart) renderLines(buffer *ui.Buffer, drawArea image.Recta...
method trimOutOfRangeValues (line 290) | func (c *RunChart) trimOutOfRangeValues() {
method calculateTimeCoordinate (line 310) | func (c *RunChart) calculateTimeCoordinate(t time.Time) int {
method moveSelection (line 316) | func (c *RunChart) moveSelection(shift int) {
method disableSelection (line 336) | func (c *RunChart) disableSelection() {
type TimePoint (line 56) | type TimePoint struct
type TimeLine (line 62) | type TimeLine struct
type TimeRange (line 71) | type TimeRange struct
type ValueExtrema (line 76) | type ValueExtrema struct
function NewRunChart (line 81) | func NewRunChart(c config.RunChartConfig, palette console.Palette) *RunC...
function getMidRangeTime (line 343) | func getMidRangeTime(r TimeRange) time.Time {
function calculateTimescale (line 349) | func calculateTimescale(rateMs int) time.Duration {
function braillePoint (line 361) | func braillePoint(point image.Point) image.Point {
FILE: component/sparkline/sparkline.go
type SparkLine (line 15) | type SparkLine struct
method consumeSample (line 53) | func (s *SparkLine) consumeSample(sample *data.Sample) {
method trimOutOfRangeValues (line 88) | func (s *SparkLine) trimOutOfRangeValues(maxSize int) {
method Draw (line 94) | func (s *SparkLine) Draw(buffer *ui.Buffer) {
function NewSparkLine (line 27) | func NewSparkLine(c config.SparkLineConfig, palette console.Palette) *Sp...
FILE: component/sparkline/sparkline_test.go
function TestSparkLine_trimOutOfRangeValues (line 7) | func TestSparkLine_trimOutOfRangeValues(t *testing.T) {
FILE: component/statusbar.go
constant pauseText (line 11) | pauseText = " P A U S E D "
constant bindingsIndent (line 12) | bindingsIndent = 3
type StatusBar (line 15) | type StatusBar struct
method Draw (line 40) | func (s *StatusBar) Draw(buffer *ui.Buffer) {
method TogglePause (line 59) | func (s *StatusBar) TogglePause() {
function NewStatusBar (line 22) | func NewStatusBar(configFileName string, palette console.Palette) *Statu...
FILE: component/textbox/textbox.go
type TextBox (line 13) | type TextBox struct
method Draw (line 49) | func (t *TextBox) Draw(buffer *ui.Buffer) {
function NewTextBox (line 22) | func NewTextBox(c config.TextBoxConfig, palette console.Palette) *TextBox {
FILE: component/util/format.go
function FormatValue (line 22) | func FormatValue(value float64, scale int) string {
function FormatDelta (line 29) | func FormatDelta(value float64, scale int) string {
function addRadixChars (line 61) | func addRadixChars(value float64) string {
function formatTrailingDigits (line 90) | func formatTrailingDigits(value string, scale int) string {
function GetMiddlePoint (line 113) | func GetMiddlePoint(rectangle image.Rectangle, text string, offset int) ...
function PrintString (line 117) | func PrintString(s string, style ui.Style, p image.Point, buffer *ui.Buf...
FILE: component/util/format_test.go
function TestFormatValue (line 5) | func TestFormatValue(t *testing.T) {
FILE: component/util/geometry.go
function GetRectLeftSideCenter (line 7) | func GetRectLeftSideCenter(rect image.Rectangle) image.Point {
function GetRectRightSideCenter (line 14) | func GetRectRightSideCenter(rect image.Rectangle) image.Point {
function GetRectTopSideCenter (line 21) | func GetRectTopSideCenter(rect image.Rectangle) image.Point {
function GetRectBottomSideCenter (line 28) | func GetRectBottomSideCenter(rect image.Rectangle) image.Point {
function GetRectCoordinates (line 35) | func GetRectCoordinates(area image.Rectangle, width int, height int) (in...
FILE: component/util/geometry_test.go
function TestGetRectLeftSideCenter (line 6) | func TestGetRectLeftSideCenter(t *testing.T) {
function TestGetRectRightSideCenter (line 18) | func TestGetRectRightSideCenter(t *testing.T) {
function TestGetRectTopSideCenter (line 30) | func TestGetRectTopSideCenter(t *testing.T) {
function TestGetRectBottomSideCenter (line 42) | func TestGetRectBottomSideCenter(t *testing.T) {
FILE: component/util/math.go
function Max (line 3) | func Max(numbers []int) int {
FILE: component/util/parse.go
function ParseFloat (line 8) | func ParseFloat(input string) (float64, error) {
FILE: component/util/parse_test.go
function TestParseFloat (line 5) | func TestParseFloat(t *testing.T) {
FILE: config/arrangement.go
method setDefaultArrangement (line 9) | func (c *Config) setDefaultArrangement() {
function arrangeIntoLargestComponent (line 32) | func arrangeIntoLargestComponent(component *ComponentConfig, lc *Compone...
function arrangeIntoLargestEmptySpace (line 58) | func arrangeIntoLargestEmptySpace(component *ComponentConfig, le image.R...
function allHaveNoPosition (line 65) | func allHaveNoPosition(components []*ComponentConfig) bool {
function getLargestComponent (line 74) | func getLargestComponent(components []*ComponentConfig) *ComponentConfig {
function getSquare (line 87) | func getSquare(c *ComponentConfig) int {
function getComponents (line 92) | func getComponents(c *Config) []*ComponentConfig {
function setSingleComponentPosition (line 118) | func setSingleComponentPosition(c *ComponentConfig) {
function getLargestEmptySpaceRectangle (line 127) | func getLargestEmptySpaceRectangle(components []*ComponentConfig) image....
function calcMaxRectangle (line 153) | func calcMaxRectangle(histogram [console.ColumnsCount]int, row int) imag...
function createHistogram (line 179) | func createHistogram(grid [console.RowsCount][console.ColumnsCount]int, ...
function countEmptyCellsBelow (line 187) | func countEmptyCellsBelow(grid [console.RowsCount][console.ColumnsCount]...
FILE: config/component.go
type ComponentType (line 9) | type ComponentType
constant TypeRunChart (line 12) | TypeRunChart ComponentType = 0
constant TypeBarChart (line 13) | TypeBarChart ComponentType = 1
constant TypeSparkLine (line 14) | TypeSparkLine ComponentType = 2
constant TypeTextBox (line 15) | TypeTextBox ComponentType = 3
constant TypeAsciiBox (line 16) | TypeAsciiBox ComponentType = 4
constant TypeGauge (line 17) | TypeGauge ComponentType = 5
type ComponentConfig (line 20) | type ComponentConfig struct
method GetLocation (line 28) | func (c *ComponentConfig) GetLocation() Location {
method GetSize (line 32) | func (c *ComponentConfig) GetSize() Size {
method GetRectangle (line 36) | func (c *ComponentConfig) GetRectangle() image.Rectangle {
type TriggerConfig (line 47) | type TriggerConfig struct
type ActionsConfig (line 53) | type ActionsConfig struct
type GaugeConfig (line 60) | type GaugeConfig struct
type SparkLineConfig (line 70) | type SparkLineConfig struct
type BarChartConfig (line 77) | type BarChartConfig struct
type AsciiBoxConfig (line 83) | type AsciiBoxConfig struct
type TextBoxConfig (line 90) | type TextBoxConfig struct
type RunChartConfig (line 96) | type RunChartConfig struct
type LegendConfig (line 103) | type LegendConfig struct
type Item (line 108) | type Item struct
type Location (line 118) | type Location struct
type Size (line 123) | type Size struct
type ComponentSettings (line 128) | type ComponentSettings struct
function getPosition (line 135) | func getPosition(location Location, size Size) [][]int {
FILE: config/config.go
type Config (line 13) | type Config struct
method findComponent (line 57) | func (c *Config) findComponent(componentType ComponentType, componentT...
function LoadConfig (line 24) | func LoadConfig() (*Config, Options) {
function Update (line 48) | func Update(settings []ComponentSettings, options Options) {
function readFile (line 102) | func readFile(location *string) *Config {
function saveFile (line 119) | func saveFile(config *Config, fileName *string) {
FILE: config/default.go
constant defaultRateMs (line 8) | defaultRateMs = 1000
constant defaultScale (line 9) | defaultScale = 1
constant defaultTheme (line 10) | defaultTheme = console.ThemeDark
method setDefaults (line 13) | func (c *Config) setDefaults() {
method setDefaultValues (line 19) | func (c *Config) setDefaultValues() {
function setDefaultTriggersValues (line 150) | func setDefaultTriggersValues(triggers []TriggerConfig) {
method setDefaultItemSettings (line 176) | func (c *Config) setDefaultItemSettings() {
FILE: config/options.go
type Options (line 4) | type Options struct
FILE: config/validator.go
method validate (line 8) | func (c *Config) validate() {
function validateItemsScripts (line 44) | func validateItemsScripts(title string, items []Item) {
function validateItemScripts (line 50) | func validateItemScripts(title string, i Item) {
function validateLabelsUniqueness (line 59) | func validateLabelsUniqueness(title string, items []Item) {
function validateTitlesUniqueness (line 70) | func validateTitlesUniqueness(components []ComponentConfig) {
FILE: console/console.go
constant MaxRenderInterval (line 13) | MaxRenderInterval = 1000 * time.Millisecond
constant MinRenderInterval (line 14) | MinRenderInterval = 100 * time.Millisecond
constant ColumnsCount (line 15) | ColumnsCount = 80
constant RowsCount (line 16) | RowsCount = 40
constant AppTitle (line 17) | AppTitle = "sampler"
constant AppVersion (line 18) | AppVersion = "1.1.0"
constant BellCharacter (line 22) | BellCharacter = "\a"
type AsciiFont (line 25) | type AsciiFont
constant AsciiFont2D (line 28) | AsciiFont2D AsciiFont = "2d"
constant AsciiFont3D (line 29) | AsciiFont3D AsciiFont = "3d"
function Init (line 32) | func Init() {
function Close (line 43) | func Close() {
function Exit (line 48) | func Exit(message string) {
FILE: console/palette.go
type Theme (line 10) | type Theme
constant ThemeDark (line 13) | ThemeDark Theme = "dark"
constant ThemeLight (line 14) | ThemeLight Theme = "light"
constant ColorOlive (line 18) | ColorOlive ui.Color = 178
constant ColorDeepSkyBlue (line 19) | ColorDeepSkyBlue ui.Color = 39
constant ColorDeepPink (line 20) | ColorDeepPink ui.Color = 198
constant ColorCian (line 21) | ColorCian ui.Color = 43
constant ColorOrange (line 22) | ColorOrange ui.Color = 166
constant ColorPurple (line 23) | ColorPurple ui.Color = 129
constant ColorGreen (line 24) | ColorGreen ui.Color = 64
constant ColorDarkRed (line 25) | ColorDarkRed ui.Color = 88
constant ColorBlueViolet (line 26) | ColorBlueViolet ui.Color = 57
constant ColorDarkGrey (line 27) | ColorDarkGrey ui.Color = 238
constant ColorLightGrey (line 28) | ColorLightGrey ui.Color = 254
constant ColorGrey (line 29) | ColorGrey ui.Color = 242
constant ColorWhite (line 30) | ColorWhite ui.Color = 15
constant ColorBlack (line 31) | ColorBlack ui.Color = 0
constant ColorClear (line 32) | ColorClear ui.Color = -1
constant menuColorNix (line 36) | menuColorNix ui.Color = 255
constant menuColorReverseNix (line 37) | menuColorReverseNix ui.Color = 235
constant menuColorWindows (line 38) | menuColorWindows ui.Color = 255
constant menuColorReverseWindows (line 39) | menuColorReverseWindows ui.Color = 0
type Palette (line 42) | type Palette struct
function GetPalette (line 51) | func GetPalette(theme Theme) Palette {
function GetMenuColor (line 76) | func GetMenuColor() ui.Color {
function GetMenuColorReverse (line 87) | func GetMenuColorReverse() ui.Color {
function GetGradientColor (line 96) | func GetGradientColor(gradient []ui.Color, cur int, max int) ui.Color {
FILE: console/palette_test.go
function TestGetPalette (line 9) | func TestGetPalette(t *testing.T) {
function TestGetPaletteInvalidTheme (line 38) | func TestGetPaletteInvalidTheme(t *testing.T) {
function TestGetGradientColor (line 50) | func TestGetGradientColor(t *testing.T) {
FILE: console/signal.go
constant SignalResize (line 4) | SignalResize = "<Resize>"
constant SignalClick (line 5) | SignalClick = "<MouseLeft>"
constant KeyPause1 (line 9) | KeyPause1 = "p"
constant KeyPause2 (line 10) | KeyPause2 = "P"
constant KeyQuit1 (line 11) | KeyQuit1 = "q"
constant KeyQuit2 (line 12) | KeyQuit2 = "Q"
constant KeyQuit3 (line 13) | KeyQuit3 = "<C-c>"
constant KeyLeft (line 14) | KeyLeft = "<Left>"
constant KeyRight (line 15) | KeyRight = "<Right>"
constant KeyUp (line 16) | KeyUp = "<Up>"
constant KeyDown (line 17) | KeyDown = "<Down>"
constant KeyEnter (line 18) | KeyEnter = "<Enter>"
constant KeyEsc (line 19) | KeyEsc = "<Escape>"
FILE: console/symbol.go
constant SymbolSelection (line 4) | SymbolSelection rune = '▲'
constant SymbolVerticalBar (line 5) | SymbolVerticalBar rune = '▎'
constant SymbolHorizontalBar (line 6) | SymbolHorizontalBar rune = '═'
FILE: data/consumer.go
type Consumer (line 8) | type Consumer struct
method HandleConsumeSuccess (line 15) | func (c *Consumer) HandleConsumeSuccess() {
method HandleConsumeFailure (line 21) | func (c *Consumer) HandleConsumeFailure(title string, err error, sampl...
type Sample (line 30) | type Sample struct
type Alert (line 36) | type Alert struct
type Command (line 43) | type Command struct
function NewConsumer (line 48) | func NewConsumer() *Consumer {
FILE: data/consumer_test.go
function TestConsumer_HandleConsumeSuccess (line 9) | func TestConsumer_HandleConsumeSuccess(t *testing.T) {
function TestConsumer_HandleConsumeFailure (line 31) | func TestConsumer_HandleConsumeFailure(t *testing.T) {
function TestNewConsumer (line 68) | func TestNewConsumer(t *testing.T) {
FILE: data/error.go
function getErrorMessage (line 8) | func getErrorMessage(err error) string {
FILE: data/int.go
constant startupTimeout (line 6) | startupTimeout = 200 * time.Millisecond
constant minAwaitTimeout (line 7) | minAwaitTimeout = 100 * time.Millisecond
constant maxAwaitTimeout (line 8) | maxAwaitTimeout = 1 * time.Second
type InteractiveShell (line 11) | type InteractiveShell interface
FILE: data/int_basic.go
type BasicInteractiveShell (line 15) | type BasicInteractiveShell struct
method init (line 26) | func (s *BasicInteractiveShell) init() error {
method execute (line 80) | func (s *BasicInteractiveShell) execute() (string, error) {
FILE: data/int_pty.go
type PtyInteractiveShell (line 17) | type PtyInteractiveShell struct
method init (line 27) | func (s *PtyInteractiveShell) init() error {
method execute (line 68) | func (s *PtyInteractiveShell) execute() (string, error) {
method getAwaitTimeout (line 122) | func (s *PtyInteractiveShell) getAwaitTimeout() time.Duration {
FILE: data/int_pty_windows.go
type PtyInteractiveShell (line 8) | type PtyInteractiveShell struct
method init (line 14) | func (s *PtyInteractiveShell) init() error {
method execute (line 18) | func (s *PtyInteractiveShell) execute() (string, error) {
FILE: data/item.go
constant errorThreshold (line 12) | errorThreshold = 10
type Item (line 14) | type Item struct
method nextValue (line 45) | func (i *Item) nextValue(variables []string) (string, error) {
method execute (line 63) | func (i *Item) execute(variables []string, script string) (string, err...
method initInteractiveShell (line 79) | func (i *Item) initInteractiveShell(v []string) error {
method transform (line 93) | func (i *Item) transform(sample string) (string, error) {
function NewItems (line 26) | func NewItems(cfgs []config.Item, rateMs int) []*Item {
function enrichEnvVariables (line 102) | func enrichEnvVariables(cmd *exec.Cmd, variables []string) {
function getInitScripts (line 109) | func getInitScripts(item config.Item) []string {
FILE: data/sampler.go
type Sampler (line 9) | type Sampler struct
method sample (line 57) | func (s *Sampler) sample(item *Item, options config.Options) {
method Pause (line 87) | func (s *Sampler) Pause(pause bool) {
function NewSampler (line 18) | func NewSampler(consumer *Consumer, items []*Item, triggers []*Trigger, ...
function mergeVariables (line 76) | func mergeVariables(fileVariables map[string]string, optionsVariables []...
FILE: data/trigger.go
constant TrueIndicator (line 14) | TrueIndicator = "1"
constant InitialValue (line 15) | InitialValue = "0"
type Trigger (line 18) | type Trigger struct
method Execute (line 70) | func (t *Trigger) Execute(sample *Sample) {
method evaluate (line 96) | func (t *Trigger) evaluate(sample *Sample) bool {
method runScript (line 120) | func (t *Trigger) runScript(script, label string, data Values) ([]byte...
type Actions (line 29) | type Actions struct
type Values (line 36) | type Values struct
function NewTriggers (line 41) | func NewTriggers(cfgs []config.TriggerConfig, consumer *Consumer, option...
function NewTrigger (line 52) | func NewTrigger(config config.TriggerConfig, consumer *Consumer, options...
FILE: event/handler.go
constant refreshRateToRenderRateRatio (line 13) | refreshRateToRenderRateRatio = 0.5
type Handler (line 16) | type Handler struct
method HandleEvents (line 37) | func (h *Handler) HandleEvents() {
method handleModeChange (line 68) | func (h *Handler) handleModeChange(m layout.Mode) {
method pause (line 87) | func (h *Handler) pause(pause bool) {
method updateConfigFile (line 93) | func (h *Handler) updateConfigFile() {
function NewHandler (line 25) | func NewHandler(samplers []*data.Sampler, options config.Options, layout...
function calcMinRenderRate (line 102) | func calcMinRenderRate(layout *layout.Layout) time.Duration {
FILE: main.go
type Starter (line 21) | type Starter struct
method startAll (line 29) | func (s *Starter) startAll() []*data.Sampler {
method start (line 58) | func (s *Starter) start(drawable ui.Drawable, consumer *data.Consumer,...
function main (line 67) | func main() {
Condensed preview — 58 files, each showing path, character count, and a content snippet. Download the .json file or copy for the full structured content (244K chars).
[
{
"path": ".github/FUNDING.yml",
"chars": 39,
"preview": "custom: ['http://sampler.dev/sponsor']\n"
},
{
"path": ".gitignore",
"chars": 55,
"preview": "*.dll\n*.so\n*.dylib\n*.test\n*.out\n*.db\n.idea/\n*.iml\n*.iws"
},
{
"path": ".travis.yml",
"chars": 232,
"preview": "language: go\ngo:\n - 1.12.x\n - master\nos:\n - linux\n - osx\naddons:\n apt:\n packages:\n - libasound2-dev\ndist: t"
},
{
"path": "Dockerfile",
"chars": 302,
"preview": "FROM ubuntu:focal\n\nENV Sampler=/usr/local/bin/sampler\n\nRUN apt-get update && apt-get upgrade --yes && apt-get install li"
},
{
"path": "LICENSE.md",
"chars": 35148,
"preview": " GNU GENERAL PUBLIC LICENSE\n Version 3, 29 June 2007\n\n Copyright (C) 2007 Free "
},
{
"path": "README.md",
"chars": 15865,
"preview": "# Sampler. Visualization for any shell command.\n[![Build Status](https://travis-ci.com/sqshq/sampler.svg?token=LdyRhxxjD"
},
{
"path": "asset/bindata.go",
"chars": 52189,
"preview": "// Code generated by go-bindata. (@generated) DO NOT EDIT.\n// sources:\n// 3d.flf\n// 2d.flf\n// quindar-tone.mp3\npackage a"
},
{
"path": "asset/file.go",
"chars": 306,
"preview": "package asset\n\nimport (\n\t\"bytes\"\n\t\"io\"\n)\n\ntype AssetFile struct {\n\treader io.Reader\n}\n\nfunc NewAssetFile(data []byte) As"
},
{
"path": "asset/player.go",
"chars": 907,
"preview": "package asset\n\nimport (\n\t\"github.com/hajimehoshi/go-mp3\"\n\t\"github.com/hajimehoshi/oto\"\n\t\"io\"\n\t\"log\"\n)\n\ntype AudioPlayer "
},
{
"path": "component/alert.go",
"chars": 1249,
"preview": "package component\n\nimport (\n\t\"fmt\"\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/component/util\"\n\t\"github."
},
{
"path": "component/asciibox/asciibox.go",
"chars": 2183,
"preview": "package asciibox\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\tfl \"github.com/mbndr/figlet4go\"\n\t\"github.com/sqshq/sampler/"
},
{
"path": "component/barchart/barchart.go",
"chars": 3533,
"preview": "package barchart\n\nimport (\n\t\"fmt\"\n\tui \"github.com/gizak/termui/v3\"\n\trw \"github.com/mattn/go-runewidth\"\n\t\"github.com/sqsh"
},
{
"path": "component/block.go",
"chars": 429,
"preview": "package component\n\nimport (\n\t\"fmt\"\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/console\"\n)\n\nfunc NewBlock"
},
{
"path": "component/component.go",
"chars": 888,
"preview": "package component\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/config\"\n\t\"github.com/sqshq/sampl"
},
{
"path": "component/gauge/gauge.go",
"chars": 2877,
"preview": "package gauge\n\nimport (\n\t\"fmt\"\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/component\"\n\t\"github.com/sqshq"
},
{
"path": "component/gauge/gauge_test.go",
"chars": 955,
"preview": "package gauge\n\nimport \"testing\"\n\nfunc Test_calculatePercent(t *testing.T) {\n\ttype args struct {\n\t\tg *Gauge\n\t}\n\ttests := "
},
{
"path": "component/layout/layout.go",
"chars": 10126,
"preview": "package layout\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/component\"\n\t\"github.com/sqshq/sampl"
},
{
"path": "component/menu.go",
"chars": 5484,
"preview": "package component\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/component/util\"\n\t\"github.com/sqs"
},
{
"path": "component/runchart/grid.go",
"chars": 4075,
"preview": "package runchart\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/component/util\"\n\t\"image\"\n\t\"math\"\n"
},
{
"path": "component/runchart/legend.go",
"chars": 2780,
"preview": "package runchart\n\nimport (\n\t\"fmt\"\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/component/util\"\n\t\"image\"\n\t"
},
{
"path": "component/runchart/runchart.go",
"chars": 8303,
"preview": "package runchart\n\nimport (\n\t\"github.com/sqshq/sampler/component\"\n\t\"github.com/sqshq/sampler/component/util\"\n\t\"github.com"
},
{
"path": "component/sparkline/sparkline.go",
"chars": 3197,
"preview": "package sparkline\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/component\"\n\t\"github.com/sqshq/sa"
},
{
"path": "component/sparkline/sparkline_test.go",
"chars": 913,
"preview": "package sparkline\n\nimport (\n\t\"testing\"\n)\n\nfunc TestSparkLine_trimOutOfRangeValues(t *testing.T) {\n\ttype Sparkline struct"
},
{
"path": "component/statusbar.go",
"chars": 1454,
"preview": "package component\n\nimport (\n\t\"fmt\"\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/console\"\n\t\"image\"\n)\n\ncons"
},
{
"path": "component/textbox/textbox.go",
"chars": 1433,
"preview": "package textbox\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/component\"\n\t\"github.com/sqshq/samp"
},
{
"path": "component/util/format.go",
"chars": 2521,
"preview": "package util\n\nimport (\n\t\"bytes\"\n\t\"fmt\"\n\tui \"github.com/gizak/termui/v3\"\n\t\"image\"\n\t\"math\"\n\t\"strconv\"\n\t\"strings\"\n)\n\nvar As"
},
{
"path": "component/util/format_test.go",
"chars": 727,
"preview": "package util\n\nimport \"testing\"\n\nfunc TestFormatValue(t *testing.T) {\n\ttype args struct {\n\t\tvalue float64\n\t\tscale int\n\t}\n"
},
{
"path": "component/util/geometry.go",
"chars": 810,
"preview": "package util\n\nimport (\n\t\"image\"\n)\n\nfunc GetRectLeftSideCenter(rect image.Rectangle) image.Point {\n\treturn image.Point{\n\t"
},
{
"path": "component/util/geometry_test.go",
"chars": 1211,
"preview": "package util\n\nimport \"testing\"\nimport \"image\"\n\nfunc TestGetRectLeftSideCenter(t *testing.T) {\n\trect := image.Rect(10, 10"
},
{
"path": "component/util/math.go",
"chars": 142,
"preview": "package util\n\nfunc Max(numbers []int) int {\n\n\tmax := numbers[0]\n\n\tfor _, n := range numbers {\n\t\tif n > max {\n\t\t\tmax = n\n"
},
{
"path": "component/util/parse.go",
"chars": 380,
"preview": "package util\n\nimport (\n\t\"strconv\"\n\t\"strings\"\n)\n\nfunc ParseFloat(input string) (float64, error) {\n\n\tclean := strings.Trim"
},
{
"path": "component/util/parse_test.go",
"chars": 943,
"preview": "package util\n\nimport \"testing\"\n\nfunc TestParseFloat(t *testing.T) {\n\ttype args struct {\n\t\tinput string\n\t}\n\ttests := []st"
},
{
"path": "config/arrangement.go",
"chars": 4453,
"preview": "package config\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/console\"\n\t\"image\"\n)\n\nfunc (c *Confi"
},
{
"path": "config/component.go",
"chars": 3625,
"preview": "package config\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/console\"\n\t\"image\"\n)\n\ntype Component"
},
{
"path": "config/config.go",
"chars": 3113,
"preview": "package config\n\nimport (\n\t\"fmt\"\n\t\"github.com/jessevdk/go-flags\"\n\t\"github.com/sqshq/sampler/console\"\n\t\"gopkg.in/yaml.v3\"\n"
},
{
"path": "config/default.go",
"chars": 4664,
"preview": "package config\n\nimport (\n\t\"github.com/sqshq/sampler/console\"\n)\n\nconst (\n\tdefaultRateMs = 1000\n\tdefaultScale = 1\n\tdefaul"
},
{
"path": "config/options.go",
"chars": 437,
"preview": "package config\n\n// Options with cli flags\ntype Options struct {\n\tConfigFile *string `short:\"c\" long:\"config\" descripti"
},
{
"path": "config/validator.go",
"chars": 2288,
"preview": "package config\n\nimport (\n\t\"fmt\"\n\t\"github.com/sqshq/sampler/console\"\n)\n\nfunc (c *Config) validate() {\n\n\tvar components []"
},
{
"path": "console/console.go",
"chars": 814,
"preview": "package console\n\nimport (\n\t\"fmt\"\n\t\"log\"\n\t\"os\"\n\t\"time\"\n\n\tui \"github.com/gizak/termui/v3\"\n)\n\nconst (\n\tMaxRenderInterval = "
},
{
"path": "console/palette.go",
"chars": 2573,
"preview": "package console\n\nimport (\n\t\"fmt\"\n\t\"runtime\"\n\n\tui \"github.com/gizak/termui/v3\"\n)\n\ntype Theme string\n\nconst (\n\tThemeDark "
},
{
"path": "console/palette_test.go",
"chars": 1845,
"preview": "package console\n\nimport (\n\t\"testing\"\n\n\tui \"github.com/gizak/termui/v3\"\n)\n\nfunc TestGetPalette(t *testing.T) {\n\tvar (\n\t\td"
},
{
"path": "console/signal.go",
"chars": 318,
"preview": "package console\n\nconst (\n\tSignalResize = \"<Resize>\"\n\tSignalClick = \"<MouseLeft>\"\n)\n\nconst (\n\tKeyPause1 = \"p\"\n\tKeyPause2"
},
{
"path": "console/symbol.go",
"chars": 123,
"preview": "package console\n\nconst (\n\tSymbolSelection rune = '▲'\n\tSymbolVerticalBar rune = '▎'\n\tSymbolHorizontalBar rune = '═'"
},
{
"path": "data/consumer.go",
"chars": 961,
"preview": "package data\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"strings\"\n)\n\ntype Consumer struct {\n\tSampleChannel chan *Sampl"
},
{
"path": "data/consumer_test.go",
"chars": 2357,
"preview": "package data\n\nimport (\n\t\"errors\"\n\t\"reflect\"\n\t\"testing\"\n)\n\nfunc TestConsumer_HandleConsumeSuccess(t *testing.T) {\n\ttests "
},
{
"path": "data/error.go",
"chars": 286,
"preview": "package data\n\nimport (\n\t\"fmt\"\n\t\"os/exec\"\n)\n\nfunc getErrorMessage(err error) string {\n\n\texitErr, ok := err.(*exec.ExitErr"
},
{
"path": "data/int.go",
"chars": 236,
"preview": "package data\n\nimport \"time\"\n\nconst (\n\tstartupTimeout = 200 * time.Millisecond\n\tminAwaitTimeout = 100 * time.Millisecond"
},
{
"path": "data/int_basic.go",
"chars": 2390,
"preview": "package data\n\nimport (\n\t\"bufio\"\n\t\"errors\"\n\t\"fmt\"\n\t\"github.com/lunixbochs/vtclean\"\n\t\"io\"\n\t\"os/exec\"\n\t\"strings\"\n\t\"time\"\n)\n"
},
{
"path": "data/int_pty.go",
"chars": 2499,
"preview": "//+build !windows\n\npackage data\n\nimport (\n\t\"bufio\"\n\t\"fmt\"\n\t\"github.com/kr/pty\"\n\t\"github.com/lunixbochs/vtclean\"\n\t\"io\"\n\t\""
},
{
"path": "data/int_pty_windows.go",
"chars": 373,
"preview": "package data\n\nimport (\n\t\"errors\"\n\t\"time\"\n)\n\ntype PtyInteractiveShell struct {\n\titem *Item\n\tvariables []string\n\ttime"
},
{
"path": "data/item.go",
"chars": 2494,
"preview": "package data\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/lunixbochs/vtclean\"\n\t\"github.com/sqshq/sampler/conf"
},
{
"path": "data/sampler.go",
"chars": 1854,
"preview": "package data\n\nimport (\n\t\"fmt\"\n\t\"github.com/sqshq/sampler/config\"\n\t\"time\"\n)\n\ntype Sampler struct {\n\tconsumer *Cons"
},
{
"path": "data/trigger.go",
"chars": 3134,
"preview": "package data\n\nimport (\n\t\"fmt\"\n\t\"github.com/sqshq/sampler/asset\"\n\t\"github.com/sqshq/sampler/config\"\n\t\"github.com/sqshq/sa"
},
{
"path": "event/handler.go",
"chars": 2839,
"preview": "package event\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/component/layout\"\n\t\"github.com/sqshq"
},
{
"path": "example.yml",
"chars": 3314,
"preview": "runcharts:\n - title: Search engine response time\n position: [[0, 0], [45, 19]]\n rate-ms: 500\n triggers:\n "
},
{
"path": "go.mod",
"chars": 948,
"preview": "module github.com/sqshq/sampler\n\ngo 1.17\n\nrequire (\n\tgithub.com/gizak/termui/v3 v3.0.0\n\tgithub.com/hajimehoshi/go-mp3 v0"
},
{
"path": "go.sum",
"chars": 3661,
"preview": "github.com/cjbassi/drawille-go v0.0.0-20190126131713-27dc511fe6fd h1:XtfPmj9tQRilnrEmI1HjQhxXWRhEM+m8CACtaMJE/kM=\ngithub"
},
{
"path": "main.go",
"chars": 3072,
"preview": "package main\n\nimport (\n\tui \"github.com/gizak/termui/v3\"\n\t\"github.com/sqshq/sampler/asset\"\n\t\"github.com/sqshq/sampler/com"
}
]
About this extraction
This page contains the full source code of the sqshq/sampler GitHub repository, extracted and formatted as plain text for AI agents and large language models (LLMs). The extraction includes 58 files (211.3 KB), approximately 74.0k tokens, and a symbol index with 375 extracted functions, classes, methods, constants, and types. Use this with OpenClaw, Claude, ChatGPT, Cursor, Windsurf, or any other AI tool that accepts text input. You can copy the full output to your clipboard or download it as a .txt file.
Extracted by GitExtract — free GitHub repo to text converter for AI. Built by Nikandr Surkov.