Full Code of antonmedv/spark for AI

Repository: antonmedv/spark
Branch: master
Commit: 7cf8fc551f14
Files: 13
Total size: 51.6 KB

Directory structure:
gitextract_teum0vry/

├── .gitignore
├── README.md
├── api.js
├── db.js
├── index.js
├── package.json
├── page.js
├── queue.js
├── render.js
├── style.css
├── svg.js
├── sync.js
└── ttl.js

================================================
FILE CONTENTS
================================================

================================================
FILE: .gitignore
================================================
/node_modules/
.env


================================================
FILE: README.md
================================================
# ⚡️ Spark <img src="https://stars.medv.io/deployphp/deployer.svg" align="right"/>

Go to [stars.medv.io](https://stars.medv.io)

Spark is a generator of pretty little graphs called sparklines, which shows GitHub stars velocity of a repo.

## Development

Clone repo, create _.env_ file with [personal access token](https://help.github.com/articles/creating-a-personal-access-token-for-the-command-line/):
```
ACCESS_TOKEN=...
```

Install packages, start server:
```
npm install
node index.js
```

## Rate limit

Spark can't eagerly load all stars of a repo, only 100 stargazers per requset allowed, and GitHub API v4 has rate limit of 5000 points per hour. 

Spark has special endpoint for monitoring remaining rate limit, queue size and processing svg: [stars.medv.io/status](https://stars.medv.io/status)

## Related

- https://github.com/qoomon/starline

## License

MIT


================================================
FILE: api.js
================================================
const delay = require('delay')
const r2 = require('r2')

const token = process.env.ACCESS_TOKEN
const headers = {
  Authorization: `bearer ${token}`
}

async function fetch(query, variables) {
  let data
  do {
    try {

      const response = await r2.post('https://api.github.com/graphql', {
        headers,
        json: {query, variables}
      }).response

      const json = await response.json()

      if (json.data) {
        data = json.data
      } else {

        if (json.message) {
          process.stderr.write(json.message + '\n')
        } else {
          process.stderr.write(JSON.stringify(json) + '\n')
        }

        if (response.headers.has('Retry-After')) {
          const retryAfter = parseInt(response.headers.get('Retry-After'))
          await delay(retryAfter * 1000)
        } else {
          await delay(60 * 1000)
        }

      }

    } catch (err) {
      process.stderr.write(JSON.stringify(json) + '\n')
      await delay(5 * 1000)
    }
  } while (!data)

  return data
}

module.exports = {fetch}


================================================
FILE: db.js
================================================
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  "1c7/chinese-independent-developer": 8199
}


================================================
FILE: index.js
================================================
require('dotenv').config()
const koa = require('koa')
const route = require('koa-route')
const serve = require('koa-static')
const fs = require('mz/fs')
const {createTextSvg} = require('./svg')
const {total, rateLimit} = require('./render')
const queue = require('./queue')
const page = require('./page')
const ttl = require('./ttl')

const app = new koa()
queue.worker()
app.use(serve('public'));

app.use(route.get('/:owner/:name.svg', async (ctx, owner, name) => {
  ctx.type = 'image/svg+xml; charset=utf-8'

  const repo = `${owner}/${name}`
  const path = `svg/${owner}/${name}.svg`.toLowerCase()

  let stats
  try {
    const maxAge = ttl(repo)
    stats = await fs.stat(path)

    ctx.set('Last-Modified', stats.mtime.toUTCString())
    ctx.set('Cache-Control', 'max-age=' + maxAge)
    ctx.body = fs.createReadStream(path)

    const now = new Date().getTime()
    const mtime = stats.mtime.getTime()

    if (now - mtime > maxAge * 1000) {
      queue.push(path, owner, name)
    }

  } catch (err) {
    if (err.code === 'ENOENT') {
      queue.push(path, owner, name)

      const p = total.get(path)
      if (p) {
        ctx.body = createTextSvg(`⚡️ loading stars ${p}%`)
      } else {
        ctx.body = createTextSvg(`👋️ waiting in queue ${queue.indexOf(path) + 1}`)
      }
    } else {
      ctx.body = createTextSvg(`⚠️ error`)
    }
  }
}))

app.use(route.get('/', async (ctx) => {
  if (ctx.query.repo) {
    ctx.redirect('/' + ctx.query.repo)
  } else {
    ctx.type = 'text/html'
    ctx.body = page.index()
  }
}))

app.use(route.get('/:owner/:name', async (ctx, owner, name) => {
  ctx.type = 'text/html'
  ctx.body = page.repo({owner, name})
}))

app.use(route.get('/status', async (ctx) => {
  ctx.type = 'application/json'
  ctx.body = {
    queueSize: queue.size(),
    processing: [...total.keys()],
    rateLimit: rateLimit.remaining
  }
}))

const port = process.env.PORT || 3000
app.listen(port)
console.log('App started on port ' + port)


================================================
FILE: package.json
================================================
{
  "name": "@medv/spark",
  "version": "1.0.0",
  "description": "GitHub Stars Sparklines",
  "main": "index.js",
  "author": "Anton Medvedev <anton@medv.io>",
  "repository": "antonmedv/spark",
  "license": "MIT",
  "dependencies": {
    "delay": "^2.0.0",
    "dotenv": "^5.0.1",
    "koa": "^2.5.0",
    "koa-route": "^3.2.0",
    "koa-static": "^4.0.2",
    "mz": "^2.7.0",
    "r2": "^2.0.1"
  }
}


================================================
FILE: page.js
================================================
const style = require('fs').readFileSync('style.css')
const rand = () => Math.round(100 * Math.random())

const layout = (content) => `
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>⚡️ GitHub Stars Sparklines</title>
  <meta name="description" content="⚡️ Spark is GitHub stars graph generator, it plots tiny little graph called sparkline, which reflects the growth rate of stars on GitHub thought history.">
  <meta name="viewport" content="width=device-width, user-scalable=yes">
  <link rel="apple-touch-icon" sizes="180x180" href="/apple-touch-icon.png">
  <link rel="icon" type="image/png" sizes="32x32" href="/favicon.png">
  <style>
    ${style}
  </style>
  <style>.github-corner:hover .octo-arm{animation:octocat-wave 560ms ease-in-out}@keyframes octocat-wave{0%,100%{transform:rotate(0)}20%,60%{transform:rotate(-25deg)}40%,80%{transform:rotate(10deg)}}@media (max-width:500px){.github-corner:hover .octo-arm{animation:none}.github-corner .octo-arm{animation:octocat-wave 560ms ease-in-out}}</style>
  <script async src="https://www.googletagmanager.com/gtag/js?id=UA-72806543-2"></script>
  <script>
    window.dataLayer = window.dataLayer || [];
    function gtag(){dataLayer.push(arguments);}
    gtag('js', new Date());
  
    gtag('config', 'UA-72806543-2');
  </script>
</head>
<body>
  <a href="https://github.com/antonmedv/spark" class="github-corner" aria-label="View source on Github">
    <svg width="80" height="80" viewBox="0 0 250 250" style="fill:#70B7FD; color:#fff; position: absolute; top: 0; border: 0; right: 0;" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg>
  </a>
  <div class="content">
    ${content}
  </div>
  <div class="r">
    <div class="r1" style="${`top: ${rand()}vh; left: ${rand()}vw`}"></div>
    <div class="r2" style="${`top: ${rand()}vh; left: ${rand()}vw`}"></div>
    <div class="r3" style="${`top: ${rand()}vh; left: ${rand()}vw`}"></div>
    <div class="r4" style="${`top: ${rand()}vh; left: ${rand()}vw`}"></div>
  </div>
</body>
</html>
`

const box = (owner, name) => {
  let title = owner + '/' + name
  if (title.length > 20) {
    title = name
  }
  return `
    <div class="box">
      <div class="name">${title}</div>
      <img class="spark" src="/${owner + '/' + name}.svg"/>
    </div>
  `
}

const a = (path) => {
  const [owner, name] = path.split('/')
  return `
    <a href="/${owner + '/' + name}">
      ${box(owner, name)}
    </a>  
  `
}

const h1 = () => `<h1><a href="/">⚡️ Spark </a><span>GitHub Stars Sparklines</span></h1>`

exports.index = () => layout(`
${h1()}
<div class="grid">
  ${a('facebook/react')}
  ${a('angular/angular')}
  ${a('vuejs/vue')}
  ${a('freeCodeCamp/freeCodeCamp')}
  ${a('jquery/jquery')}
  ${a('twbs/bootstrap')}
  ${a('rails/rails')}
  ${a('FortAwesome/Font-Awesome')}
  ${a('jashkenas/backbone')}
  ${a('php/php-src')}
  ${a('nodejs/node')}
  ${a('torvalds/linux')}
  ${a('moby/moby')}
  ${a('laravel/laravel')}
  ${a('reactjs/redux')}
  ${a('d3/d3')}
  ${a('axios/axios')}
  ${a('robbyrussell/oh-my-zsh')}
  ${a('facebook/react-native')}
  ${a('meteor/meteor')}
</div>
<div class="add-repo">
  <form method="get">
    <label for="repo">Create sparkline for any repo:</label>
    <input id="repo" name="repo" type="text" placeholder="owner/repo">
    <button type="submit">Let's Go 🔮</button>
  </form>
</div>
`)


exports.repo = ({owner, name}) => layout(`
${h1()}
<div class="one">
  <a class="one-link" href="https://github.com/${owner + '/' + name}">   
    ${box(owner, name)}
  </a>
  <p>
    The Sparkline shows GitHub stars velocity of <em>${owner + '/' + name}</em> repo for the entire lifetime of the repository.
    <br>
    <br>
    Add the Sparkline to repo's readme, copy markdown code below.
  </p>
  <code>[![Sparkline](https://stars.medv.io/${owner + '/' + name}.svg)](https://stars.medv.io/${owner + '/' + name})</code>
</div>
`)


================================================
FILE: queue.js
================================================
const {render} = require('./render')
const delay = require('delay')

const queue = []
const set = new Set()

function size() {
  return queue.length
}

async function worker() {
  do {
    try {
      const work = queue.shift()
      if (work) {
        const [path, owner, name] = work

        await render(path, owner, name)

        set.delete(path)
      } else {
        await delay(100)
      }
    } catch (err) {
      console.error(err)
    }
  } while (true)
}

function push(path, owner, name) {
  if (!set.has(path)) {
    queue.push([path, owner, name])
    set.add(path)
  }
}

function indexOf(path) {
  return queue.findIndex(([p]) => path === p)
}

module.exports = {worker, push, size, indexOf}


================================================
FILE: render.js
================================================
const {dirname} = require('path')
const fs = require('mz/fs')
const {fetch} = require('./api')
const {createSvg} = require('./svg')

const total = new Map()

const query = `
  query($owner: String!, $name: String!, $endCursor: String) {
    repository(owner: $owner, name: $name) {
      stargazers(first: 100, after: $endCursor) {
        totalCount
        edges {
          starredAt
        }
        pageInfo {
          hasNextPage
          endCursor
        }
      }
    }
    rateLimit {
      remaining
    }  
  }
`

let rateLimit = {
  remaining: 5000
}

async function render(path, owner, name) {
  total.set(path, 0)

  const data = await fetch(query, {owner, name})

  if (data.repository) {
    let {
      stargazers: {
        totalCount,
        edges: dates,
        pageInfo: {hasNextPage, endCursor}
      }
    } = data.repository

    while (hasNextPage) {
      total.set(path, Math.round(100 * dates.length / totalCount))
      console.log(`${owner}/${name}: ${total.get(path)}%`)

      const data = await fetch(query, {owner, name, endCursor})

      hasNextPage = data.repository.stargazers.pageInfo.hasNextPage
      endCursor = data.repository.stargazers.pageInfo.endCursor
      rateLimit.remaining = data.rateLimit.remaining

      dates = dates.concat(data.repository.stargazers.edges)
    }

    dates = dates.map(({starredAt}) => +(new Date(starredAt)))

    const svg = createSvg(dates)

    const dir = dirname(path)
    await fs.exists(dir) || await fs.mkdir(dir)

    fs.writeFile(path, svg)
  }

  total.delete(path)
}

module.exports = {render, total, rateLimit}


================================================
FILE: style.css
================================================
html {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}

*, *:before, *:after {
    -webkit-box-sizing: inherit;
    -moz-box-sizing: inherit;
    box-sizing: inherit;
    padding: 0;
    margin: 0;
}

body {
    font-family: Helvetica, serif;
    font-size: 14px;
    line-height: 1.5;
    color: rgba(0, 0, 0, .65);
    background-color: #f9fbff;
}

.content {
    display: flex;
    flex-direction: column;
    margin: 40px auto;
    padding-left: 20px;
    padding-right: 20px;
    max-width: 1400px;
}

h1 {
    margin-bottom: 50px;
    font-size: 32px;
}

h1 > span {
    font-size: 16px;
    font-weight: normal;
}

@media only screen and (max-device-width: 350px) {
    h1 > span {
        display: block;
    }
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    grid-gap: 15px 15px;
}

a {
    color: inherit;
    text-decoration: none;
}

.box {
    display: flex;
    flex-direction: column;
    padding: 10px 15px;
    white-space: nowrap;
    font-size: 16px;
    font-weight: 500;
    color: inherit;
    background: #fff;
    border-radius: 3px;
    -webkit-box-shadow: 0 1px 3px rgba(0, 0, 0, .12), 0 1px 2px rgba(0, 0, 0, .24);
    box-shadow: 0 1px 3px rgba(0, 0, 0, .12), 0 1px 2px rgba(0, 0, 0, .24);
    -webkit-transition: all .3s cubic-bezier(.25, .8, .25, 1);
    -o-transition: all .3s cubic-bezier(.25, .8, .25, 1);
    transition: all .3s cubic-bezier(.25, .8, .25, 1);
}

.box:hover {
    text-decoration: none;
    color: inherit;
    -webkit-transform: scale(1.01);
    -ms-transform: scale(1.01);
    transform: scale(1.01);
    -webkit-box-shadow: 0 10px 20px rgba(0, 0, 0, .19), 0 6px 6px rgba(0, 0, 0, .23);
    box-shadow: 0 10px 20px rgba(0, 0, 0, .19), 0 6px 6px rgba(0, 0, 0, .23);
}

.name {
    font-weight: 500;
    font-size: 18px;
    margin-bottom: 5px;
    padding-left: 20px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='currentColor' preserveAspectRatio='xMidYMid meet' height='1em' width='1em' viewBox='0 0 40 40' style='vertical-align: middle;'%3E%3Cg%3E%3Cpath d='m17.5 10h-2.5v2.5h2.5v-2.5z m0-5h-2.5v2.5h2.5v-2.5z m15-5h-25s-2.5 1.3-2.5 2.5v30s1.3 2.5 2.5 2.5h5v5l3.8-3.7 3.7 3.7v-5h12.5s2.5-1.2 2.5-2.5v-30s-1.2-2.5-2.5-2.5z m0 31.3c0 0.6-0.6 1.2-1.2 1.2h-11.3v-2.5h-7.5v2.5h-3.7s-1.3-0.7-1.3-1.2v-3.8h25v3.8z m0-6.3h-20v-22.5h20l0 22.5z m-15-5h-2.5v2.5h2.5v-2.5z m0-5h-2.5v2.5h2.5v-2.5z'%3E%3C/path%3E%3C/g%3E%3C/svg%3E");
    background-position: 0 8px;
    background-repeat: no-repeat;
    overflow-x: hidden;
    -o-text-overflow: ellipsis;
    text-overflow: ellipsis;
}

.spark {
    width: 200px;
    align-self: center;
}

.one {
    display: flex;
    flex-direction: column;
}

.one-link {
    display: inline-block;
    align-self: center;
    margin-top: 30px;
    margin-bottom: 60px;
    transform: scale(1.5);
}

.one > p {
    display: block;
    font-size: 16px;
    margin-top: 10px;
    max-width: 600px;
    align-self: center;    
}

code {
    margin-top: 40px;
    padding: 10px 15px;
    max-width: 600px;
    overflow-x: scroll;
    align-self: center;
    white-space: nowrap;
    font-family: monospace;
    background-color: #eeeeee;
}

@media only screen and (max-device-width: 812px) {
    code {
        width: 100%;
        max-width: none;
    }
}

.add-repo {
    margin-top: 90px;
    align-self: center;
}

.add-repo label {
    display: block;
    padding: 5px;
    font-size: 16px;
    text-align: center;
}

.add-repo input[type="text"] {
    border: none;
    border-radius: 4px;
    outline: none;
    padding: 10px 17px;
    font-family: monospace;
    font-size: 16px;
    width: 200px;
    background-color: #fff;
    box-shadow: 2px 5px 10px rgb(228, 228, 228);
}

.add-repo button {
    margin: 10px;
    padding: 12px 12px;
    cursor: pointer;
    user-select: none;
    text-align: center;
    white-space: nowrap;
    border: 0 none;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    line-height: 1.3;
    -webkit-appearance: none;
    -moz-appearance: none;
    box-shadow: 2px 5px 10px rgb(228, 228, 228);
    color: #7e8091;
    background-color: #fff;
    transition: background-color 150ms linear;
}

.add-repo button:hover {
    background-color: #f2f2f2;
}

.r {
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    position: absolute;
    z-index: -1;
    overflow: hidden;
}

.r1, .r2, .r3, .r4{
    position: relative;
    width: 50px;
    height: 50px;
    border-radius: 100%;
    border: solid 12px #fc607f;
}

.r2 {
    border-color: #4580fe;
}

.r3 {
    border-color: #fcb84d;
}

.r4 {
    border-color: #78faca;
    border-radius: 0;
}


================================================
FILE: svg.js
================================================
const height = 30
const x0 = 5
const y0 = 40
const steps = 40
const dx = 5
const basis = 1.5
const gradient = ['#3023AE', '#C86DD7']

const round = num => Math.round(num * 100) / 100
const vec = (x, y) => ({
  x, y,
  toString() {
    return `${round(this.x)} ${round(this.y)}`
  }
})
const norm = v => Math.sqrt(v.x * v.x + v.y * v.y)
const unit = v => {
  const n = norm(v)
  return vec(basis * v.x / n, basis * v.y / n)
}
const add = (a, b) => vec(a.x + b.x, a.y + b.y)
const sub = (a, b) => vec(a.x - b.x, a.y - b.y)
const end = px => px[px.length - 1]

function createSvg(data) {
  if (data.length <= steps) {
    return createTextSvg('⭐️ not enough stars')
  }

  const min = data[0]
  const max = end(data)
  const step = (max - min) / steps

  const yx = []
  {
    let i = min
    let count = 0
    for (let d of data) {
      if (d < i + step) {
        count++
      } else {
        yx.push(count)
        count = 1
        i += step
      }
    }
  }

  const scale = Math.max(...yx) / height
  {
    for (let i = 0; i < yx.length; i++) {
      yx[i] = round(yx[i] / scale)
    }
  }

  const points = []
  {
    let x = x0
    for (let y of yx) {
      x += dx
      points.push(vec(x, y0 - y))
    }
  }

  const p0 = vec(x0, y0)
  const p1 = points[0]
  const p2 = points[1]
  const c1 = add(p0, unit(sub(p1, p0)))
  const c2 = add(p1, unit(sub(p0, p2)))
  let path = `M${p0} C ${c1}, ${c2}, ${p1}`

  for (let i = 1; i < points.length; i++) {
    const p0 = points[i - 1]
    const p1 = points[i]
    const p2 = points[i + 1] || p1
    const c = add(p1, unit(sub(p0, p2)))
    path += ` S ${c}, ${p1}`
  }

  const pN = end(points)

  return `<svg width="200" height="50" viewBox="0 0 210 50" xmlns="http://www.w3.org/2000/svg">
    <defs>
        <linearGradient x1="0%" y1="0%" x2="100%" y2="0%" id="a">
            <stop stop-color="${gradient[0]}" offset="0%"/>
            <stop stop-color="${gradient[1]}" offset="100%"/>
        </linearGradient>
    </defs>
    <path stroke="url(#a)"
          stroke-width="3"
          stroke-linejoin="round"
          stroke-linecap="round"
          d="${path}"
          fill="none"/>
    <circle r="4" cx="${p0.x}" cy="${p0.y}" fill="${gradient[0]}"/>
    <circle r="4" cx="${pN.x}" cy="${pN.y}" fill="${gradient[1]}"/>      
</svg>`
}

function createTextSvg(text) {
  return `<svg width="200" height="50" viewBox="0 0 210 50" xmlns="http://www.w3.org/2000/svg">
    <text x="40" y="30">${text}</text>     
</svg>`
}

module.exports = {createSvg, createTextSvg}


================================================
FILE: sync.js
================================================
require('dotenv').config()
const fs = require('mz/fs')
const {fetch} = require('./api')

const query = `
  query ($endCursor: String) {
    search(type: REPOSITORY, query: "stars:>8000", first: 100, after: $endCursor) {
      repositoryCount
      nodes {
        ... on Repository {
          owner {
            login
          }
          name
          stargazers {
            totalCount
          }
        }
      }
      pageInfo {
        hasNextPage
        endCursor
      }
    }
  }
`

async function main() {
  let {
    search: {
      repositoryCount,
      nodes,
      pageInfo: {hasNextPage, endCursor}
    }
  } = await fetch(query)

  while (hasNextPage) {
    const pt = Math.round(100 * nodes.length / repositoryCount)
    console.log(`loading ${pt}%  ${nodes.length}/${repositoryCount}`)

    const data = await fetch(query, {endCursor})

    endCursor = data.search.pageInfo.endCursor
    hasNextPage = data.search.pageInfo.hasNextPage
    nodes = nodes.concat(data.search.nodes)
  }

  console.log('Total repos: ' + nodes.length)

  const db = {}

  for (let node of nodes) {
    const {
      owner: {login},
      name,
      stargazers: {totalCount}
    } = node

    db[login + '/' + name] = totalCount
  }

  fs.writeFile('db.js', `module.exports = ${JSON.stringify(db, null, 2)}\n`)
}

main().catch(console.log)


================================================
FILE: ttl.js
================================================
const db = require('./db')

function ttl(repo) {
  const stars = db[repo] || 0

  if (stars > 10000) {
    return 604800 // one week
  } else if (stars > 8000) {
    return 3 * 86400 // three days
  } else {
    return 86400 // one day
  }
}

module.exports = ttl