Repository: jclg/php-slack-bot
Branch: master
Commit: 6631b71d2bb4
Files: 15
Total size: 32.8 KB

Directory structure:
gitextract_z_txds45/

├── .gitignore
├── .travis.yml
├── LICENSE.md
├── README.md
├── composer.json
└── src/
    └── PhpSlackBot/
        ├── ActiveMessenger/
        │   └── Push.php
        ├── Base.php
        ├── Bot.php
        ├── Command/
        │   ├── BaseCommand.php
        │   ├── CountCommand.php
        │   ├── DateCommand.php
        │   ├── PingPongCommand.php
        │   └── PokerPlanningCommand.php
        └── Webhook/
            ├── BaseWebhook.php
            └── OutputWebhook.php

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

================================================
FILE: .gitignore
================================================
*~
.idea/
bot.php
composer.phar
composer.lock
vendor

================================================
FILE: .travis.yml
================================================
language: php
php:
  - '7.1'
before_script:
  # PHP_CodeSniffer
  - pear install pear/PHP_CodeSniffer
  - phpenv rehash
script:
  - phpcs --standard=PSR2 src/

================================================
FILE: LICENSE.md
================================================
MIT License

Copyright (c) 2016 Jean-Charles Le Goff

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.


================================================
FILE: README.md
================================================
# PHP Slack Bot

A simple bot user written in PHP using the Slack Real Time Messaging API https://api.slack.com/rtm

## Installation
With Composer

    composer require jclg/php-slack-bot

## Usage

Create a php file called `bot.php` with the following content

```php
require 'vendor/autoload.php';
use PhpSlackBot\Bot;

// Custom command
class MyCommand extends \PhpSlackBot\Command\BaseCommand {

    protected function configure() {
        $this->setName('mycommand');
    }

    protected function execute($message, $context) {
        $this->send($this->getCurrentChannel(), null, 'Hello !');
    }

}

$bot = new Bot();
$bot->setToken('TOKEN'); // Get your token here https://my.slack.com/services/new/bot
$bot->loadCommand(new MyCommand());
$bot->loadInternalCommands(); // This loads example commands
$bot->run();
```

Then run `php bot.php` from the command line (terminal).

## Example commands

Example commands are located in `src/PhpSlackBot/Command/` and can be loaded with `$bot->loadInternalCommands();`

##### Ping Pong Command

Type `ping` in a channel and the bot should answer "Pong" to you.

##### Count Command

Type `count` several times in a channel and the bot should answer with 1 then 2...

##### Date Command

Type `date` in a channel and the current date.

##### Planning Poker Command

https://en.wikipedia.org/wiki/Planning_poker

Type `pokerp start` in a public channel with your team in order to start a planning poker session.

Direct message the bot with `pokerp vote number`. The bot will record your vote.

Type `pokerp status` to see the current status of the session (who has voted).

Type `pokerp end` in a public channel and the bot will output each vote.

## Load your own commands

You can load your own commands by implementing the \PhpSlackBot\Command\BaseCommand.

Then call PhpSlackBot\Bot::loadCommand method for each command you have to load.

## "Catch All" command

If you need to execute a command when an event occurs, you can set up a "catch all" command.

This special command will be triggered on all events.

```php
require 'vendor/autoload.php';
use PhpSlackBot\Bot;

// This special command executes on all events
class SuperCommand extends \PhpSlackBot\Command\BaseCommand {

    protected function configure() {
        // We don't have to configure a command name in this case
    }

    protected function execute($data, $context) {
        if ($data['type'] == 'message') {
            $channel = $this->getChannelNameFromChannelId($data['channel']);
            $username = $this->getUserNameFromUserId($data['user']);
            echo $username.' from '.($channel ? $channel : 'DIRECT MESSAGE').' : '.$data['text'].PHP_EOL;
        }
    }

}

$bot = new Bot();
$bot->setToken('TOKEN'); // Get your token here https://my.slack.com/services/new/bot
$bot->loadCatchAllCommand(new SuperCommand());
$bot->run();
```

## Incoming webhooks

The bot can also listen for incoming webhooks.

Commands are triggered from users messages inside Slack and webhooks are triggered from web post requests.

Custom webhooks can be loaded using the PhpSlackBot\Bot::loadWebhook method.

This is useful if you need to control the bot from an external service. For example, with IFTTT https://ifttt.com/maker

To enable webhooks, use the enableWebserver method before the run method.

You can also set a secret token to prevent unauthorized requests.


```php
$bot->loadInternalWebhooks(); // Load the internal "output" webhook
$bot->enableWebserver(8080, 'secret'); // This will listen on port 8080
$bot->run();
```

Then, use the parameter "name" to trigger the corresponding webhook :

```
curl -X POST --data-urlencode 'auth=secret' --data-urlencode 'name=output' --data-urlencode 'payload={"type" : "message", "text": "This is a message", "channel": "#general"}' http://localhost:8080
```

## Active Messaging

The example provided in the *usage section* above sets the bot to be reactive. The reactive bot is not capable of sending messages to any user on its own. It must be given an input to get a response from. In other words, the bot can only **react** to inputs given to it. 

*Active Messaging* means that as a developer, you would be able to **send messages to your users without them sending a message to the bot first**. It is useful when you have to notify your users about something e.g. a bot which can check a user's birthday and wish them, or tell them weather outside every 2 hours without them having to type in a command everytime. There can be many other uses.

You can use active messaging this way: 

```php
$bot = new Bot();
$bot->setToken('TOKEN'); // Get your token here https://my.slack.com/services/new/bot
$bot->loadInternalCommands(); // This loads example commands
$bot->loadPushNotifier(function () {
	return [
		'channel' => '#general',
		'username' => '@slacker',
		'message' => "Happy Birthday!! Make sure you have fun today. :-)"
	];
});

$bot->loadPushNotifier(function () {
	return [
		'channel' => '@slacker',
		'username' => null,
		'message' => "Current UNIX timestamp is: " . time()
	];
}, 1800);
$bot->run();

```

In the example above, we have set two active messages. 

**First message** will send the following message in the '#general' channel: 

```
@slacker Happy Birthday!! Make sure you have fun today. :-)
```

It will be triggered only **once**, 10 seconds after launching the script. Slack servers normally establish the connection by then.

**Second message** is a periodic message. It will be sent to the user having the username *slacker* in the team. It won't mention anyone and will be repeated every 30 minutes (1800 seconds). The message should appear as: 

```
Current UNIX timestamp is: 1489145707
Current UNIX timestamp is: 1489147507
```

That should happen within 1 hour of launching. 

*NOTE*: The first message would appear 30 minutes after launching.

The function you add using `loadPushNotifier` must return an array containing the following keys:

- **channel**: Name of the channel or user to whom the message is to be sent. Channel names should have the `#` prefix while usernames must have the `@` prefix. If you do not set a prefix, the name is assumed to be a channel name. Using prefixes is recommended here.
- **username**: Any username to be mentioned ahead of the message. You can specify the name without the `@` prefix here, though you might want to use the prefix to maintain uniformity within the code.
- **message**: The actual message to be sent.



================================================
FILE: composer.json
================================================
{
    "name": "jclg/php-slack-bot",
    "description": "Slack bot user written in PHP",
    "homepage": "https://github.com/jclg/php-slack-bot",
    "license": "MIT",
    "require": {
        "semako/phpws": "1.0.1",
        "react/http": "^0.4",
        "ext-curl": "*"
    },
    "authors": [
        {
            "name": "jclg",
            "email": "jeancharleslegoff@gmail.com"
        }
    ],
    "autoload": {
        "psr-4": {
            "PhpSlackBot\\": "src/PhpSlackBot"
        }
    }
}


================================================
FILE: src/PhpSlackBot/ActiveMessenger/Push.php
================================================
<?php
namespace PhpSlackBot\ActiveMessenger;

use PhpSlackBot\Base;

class Push extends Base
{
    /**
     * @param string $channelOrUsername  Channel name (not Channel ID assigned by Slack) to which message is to be sent.
     *                                   Usernames can also be passed.
     *                                   Channel names should have the '#' prefix. Usernames MUST have the '@' prefix
     * @param string $usernameForMention If a user is to be mentioned in a message.
     * @param string $message            Actual message to be sent
     *
     * @throws \Exception
     */
    public function sendMessage($channelOrUsername, $usernameForMention, $message)
    {
        // if the channelOrUsername is set to null, then do not send the message
        if (!$channelOrUsername) {
            return;
        }

        // See the first character
        if (strpos($channelOrUsername, '@') === 0) {
            // User's name was requested
            $userId = $this->getUserIdFromUserName($channelOrUsername);
            $channelId = $this->getImIdFromUserId($userId);
        } elseif (strpos($channelOrUsername, '#') === 0) {
            // Channel requested
            $channelId = $this->getChannelIdFromChannelName($channelOrUsername);
        } else {
            // Neither user not channel requested
            // NOTE: We assume it to be a channel name
            $channelId = $this->getChannelIdFromChannelName($channelOrUsername);
        }

        $usernameToSend = $this->getUserIdFromUserName($usernameForMention);
        if (!$usernameToSend) {
            $usernameToSend = null;
        }

        if ($channelId) {
            $this->send($channelId, $usernameToSend, $message);
        } else {
            throw new \Exception('Cannot resolve channel ID to to send the message');
        }
    }

    /**
     * This method is defined here only to satisfy the requirements for extending an abstract class
     */
    protected function configure()
    {
    }

    /**
     * This method is defined here only to satisfy the requirements for extending an abstract class
     */
    public function execute($message, $context)
    {
    }
}


================================================
FILE: src/PhpSlackBot/Base.php
================================================
<?php
namespace PhpSlackBot;

abstract class Base
{
    private $name;
    private $client;
    private $user;
    private $context;
    private $mentionOnly = false;
    private $channel;
    private $caseInsensitive = false;
    abstract protected function configure();
    abstract protected function execute($message, $context);

    public function getName()
    {
        $this->configure();
        return $this->name;
    }

    public function getClient()
    {
        return $this->client;
    }

    public function getMentionOnly()
    {
        return $this->mentionOnly;
    }

    public function setMentionOnly($mentionOnly)
    {
        $this->mentionOnly = $mentionOnly;
    }

    public function setName($name)
    {
        $this->name = $name;
    }

    public function setClient($client)
    {
        $this->client = $client;
    }

    public function setChannel($channel)
    {
        $this->channel = $channel;
    }

    public function setUser($user)
    {
        $this->user = $user;
    }

    public function getCurrentUser()
    {
        return $this->user;
    }

    public function setContext($context)
    {
        $this->context = $context;
    }

    public function getCurrentContext()
    {
        return $this->context;
    }

    public function getCurrentChannel()
    {
        return $this->channel;
    }

    public function setCaseInsensitive($caseInsensitive)
    {
        $this->caseInsensitive = $caseInsensitive;
    }

    public function getCaseInsensitive()
    {
        return $this->caseInsensitive;
    }

    protected function send($channel, $username, $message, $parent_thread = null)
    {
        $response = array(
                          'id' => time(),
                          'type' => 'message',
                          'channel' => $channel,
                          'text' => (!is_null($username) ? '<@'.$username.'> ' : '').$message
                          );
        if ($parent_thread) {
            $response['thread_ts'] = $parent_thread;
        }
        $this->client->send(json_encode($response));
    }

    protected function getUserNameFromUserId($userId)
    {
        $username = 'unknown';
        foreach ($this->context['users'] as $user) {
            if ($user['id'] == $userId) {
                $username = $user['name'];
            }
        }
        return $username;
    }

    protected function getUserIdFromUserName($userName)
    {
        $userId = '';
        $userName = str_replace('@', '', $userName);
        foreach ($this->context['users'] as $user) {
            if ($user['name'] == $userName) {
                $userId = $user['id'];
            }
        }
        return $userId;
    }

    protected function getChannelIdFromChannelName($channelName)
    {
        $channelName = str_replace('#', '', $channelName);
        foreach ($this->context['channels'] as $channel) {
            if ($channel['name'] == $channelName) {
                return $channel['id'];
            }
        }
        foreach ($this->context['groups'] as $group) {
            if ($group['name'] == $channelName) {
                return $group['id'];
            }
        }
        return false;
    }

    protected function getChannelNameFromChannelId($channelId)
    {
        foreach ($this->context['channels'] as $channel) {
            if ($channel['id'] == $channelId) {
                return $channel['name'];
            }
        }
        foreach ($this->context['groups'] as $group) {
            if ($group['id'] == $channelId) {
                return $group['name'];
            }
        }
        return false;
    }

    protected function getImIdFromUserId($userId)
    {
        foreach ($this->context['ims'] as $im) {
            if ($im['user'] == $userId) {
                return $im['id'];
            }
        }
        return false;
    }
}


================================================
FILE: src/PhpSlackBot/Bot.php
================================================
<?php
namespace PhpSlackBot;

class Bot
{

    private $params = array();
    private $context = array();
    private $wsUrl;
    private $commands = array();
    private $webhooks = array();
    private $webserverPort = null;
    private $webserverHost = null;
    private $webserverAuthentificationToken = null;
    private $catchAllCommands = array();
    private $pushNotifiers = array();
    private $activeMessenger = null;
    protected $logger = null;

    public function setToken($token)
    {
        $this->params = array('token' => $token);
    }

    public function loadCommand($command)
    {
        if ($command instanceof Command\BaseCommand) {
            $this->commands[$command->getName()] = $command;
        } else {
            throw new \Exception('Command must implement PhpSlackBot\Command\BaseCommand');
        }
    }

    public function loadWebhook($webhook)
    {
        if ($webhook instanceof Webhook\BaseWebhook) {
            $this->webhooks[$webhook->getName()] = $webhook;
        } else {
            throw new \Exception('Webhook must implement PhpSlackBot\Webhook\BaseWebhook');
        }
    }

    public function loadCatchAllCommand($command)
    {
        if ($command instanceof Command\BaseCommand) {
            $this->catchAllCommands[] = $command;
        } else {
            throw new \Exception('Command must implement PhpSlackBot\Command\BaseCommand');
        }
    }

    public function enableWebserver($port, $authentificationToken = null, $host = '127.0.0.1')
    {
        $this->webserverPort = $port;
        $this->webserverAuthentificationToken = $authentificationToken;
        $this->webserverHost = $host;
    }

    public function loadPushNotifier($method, $repeatInterval = null)
    {
        if (is_callable($method)) {
            $this->pushNotifiers[] = ['interval' => (int)$repeatInterval, 'method' => $method];
        } else {
            throw new \Exception('Closure passed as push notifier is not callable.');
        }
    }

    public function run()
    {
        if (!isset($this->params['token'])) {
            throw new \Exception('A token must be set. Please see https://my.slack.com/services/new/bot');
        }

        $this->init();
        $logger = $this->logger;

        $loop = \React\EventLoop\Factory::create();
        $client = new \Devristo\Phpws\Client\WebSocket($this->wsUrl, $loop, $logger);

        $client->on("request", function ($headers) use ($logger) {
                $logger->notice("Request object created!");
        });

        $client->on("handshake", function () use ($logger) {
                $logger->notice("Handshake received!");
        });

        $client->on("connect", function () use ($logger, $client) {
                $logger->notice("Connected!");
        });

        $client->on("message", function ($message) use ($client, $logger) {
            $data = $message->getData();
            $logger->notice("Got message: ".$data);
            $data = json_decode($data, true);

            if (count($this->catchAllCommands)) {
                foreach ($this->catchAllCommands as $command) {
                    $command->setClient($client);
                    $command->setContext($this->context);
                    $command->executeCommand($data, $this->context);
                }
            }
            $command = $this->getCommand($data);
            if ($command instanceof Command\BaseCommand) {
                $command->setClient($client);
                if (isset($data['channel'])) {
                    $command->setChannel($data['channel']);
                }
                if (isset($data['user'])) {
                    $command->setUser($data['user']);
                }
                $command->setContext($this->context);
                $command->executeCommand($data, $this->context);
            }
        });

        /* Webserver */
        if (null !== $this->webserverPort) {
            $logger->notice("Listening on port ".$this->webserverPort);
            $socket = new \React\Socket\Server($loop);
            $http = new \React\Http\Server($socket);
            $http->on('request', function ($request, $response) use ($client) {
                $request->on('data', function ($data) use ($client, $request, $response) {
                    parse_str($data, $post);
                    if ($this->webserverAuthentificationToken === null ||
                        ($this->webserverAuthentificationToken !== null &&
                         isset($post['auth']) &&
                         $post['auth'] === $this->webserverAuthentificationToken)) {
                        if (isset($post['name']) && is_string($post['name']) && isset($this->webhooks[$post['name']])) {
                            $hook = $this->webhooks[$post['name']];
                            $hook->setClient($client);
                            $hook->setContext($this->context);
                            $hook->executeWebhook(json_decode($post['payload'], true), $this->context);
                            $response->writeHead(200, array('Content-Type' => 'text/plain'));
                            $response->end("Ok\n");
                        } else {
                            $response->writeHead(404, array('Content-Type' => 'text/plain'));
                            $response->end("No webhook found\n");
                        }
                    } else {
                        $response->writeHead(403, array('Content-Type' => 'text/plain'));
                        $response->end("");
                    }
                });
            });
            $socket->listen($this->webserverPort, $this->webserverHost);
        }

        /* Notifiers */

        if (!$this->activeMessenger) {
            $this->activeMessenger = new ActiveMessenger\Push();
            $this->activeMessenger->setContext($this->context);
            $this->activeMessenger->setClient($client);
        }
        foreach ($this->pushNotifiers as $notifierArray) {
            if ($notifierArray['interval'] != 0) {
                $loop->addPeriodicTimer($notifierArray['interval'], function () use ($notifierArray) {
                    if ($this->activeMessenger instanceof ActiveMessenger\Push) {
                        $resultArray = call_user_func($notifierArray['method']);
                        $this->activeMessenger->sendMessage(
                            $resultArray['channel'],
                            $resultArray['username'],
                            $resultArray['message']
                        );
                    }
                });
            } else {
                $loop->addTimer(10, function () use ($notifierArray) {
                    if ($this->activeMessenger instanceof ActiveMessenger\Push) {
                        $resultArray = call_user_func($notifierArray['method']);
                        $this->activeMessenger->sendMessage(
                            $resultArray['channel'],
                            $resultArray['username'],
                            $resultArray['message']
                        );
                    }
                });
            }
        }

        $client->open();

        $loop->run();
    }

    public function initLogger(\Zend\Log\LoggerInterface $logger = null)
    {
        if (! is_null($logger)) {
            $this->logger = $logger;
        } else {
            $this->logger = new \Zend\Log\Logger();
            $writer = new \Zend\Log\Writer\Stream("php://output");
            $this->logger->addWriter($writer);
        }
    }

    private function init()
    {
        $url = 'https://slack.com/api/rtm.start';
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url.'?'.http_build_query($this->params));
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        $body = curl_exec($ch);
        if ($body === false) {
            throw new \Exception('Error when requesting '.$url.' '.curl_error($ch));
        }
        curl_close($ch);
        $response = json_decode($body, true);
        if (is_null($response)) {
            throw new \Exception('Error when decoding body ('.$body.').');
        }
        $this->context = $response;
        if (isset($response['error'])) {
            throw new \Exception($response['error']);
        }
        $this->wsUrl = $response['url'];

        if (is_null($this->logger)) {
            $this->initLogger();
        }
    }

    public function loadInternalCommands()
    {
        $commands = array(
                          new \PhpSlackBot\Command\PingPongCommand,
                          new \PhpSlackBot\Command\CountCommand,
                          new \PhpSlackBot\Command\DateCommand,
                          new \PhpSlackBot\Command\PokerPlanningCommand,
                          );
        foreach ($commands as $command) {
            if (!isset($this->commands[$command->getName()])) {
                $this->commands[$command->getName()] = $command;
            }
        }
    }

    public function loadInternalWebhooks()
    {
        $webhooks = array(
                          new \PhpSlackBot\Webhook\OutputWebhook,
                          );
        foreach ($webhooks as $webhook) {
            if (!isset($this->webhooks[$webhook->getName()])) {
                $this->webhooks[$webhook->getName()] = $webhook;
            }
        }
    }

    private function getCommand($data)
    {
        if (empty($data['text'])) {
            return null;
        }

        // Check if bot is mentioned
        $botMention = false;
        if (strpos($data['text'], '<@'.$this->context['self']['id'].'>') !== false) {
            $botMention = true;
        }

        $find = '/^'.preg_quote('<@'.$this->context['self']['id'].'>', '/').'[ ]*/';
        $text = preg_replace($find, '', $data['text']);

        if (empty($text)) {
            return null;
        }

        foreach ($this->commands as $commandName => $availableCommand) {
            $find = '/^'.preg_quote($commandName).'/';
            if ($availableCommand->getCaseInsensitive()) {
                $find .= 'i';
            }

            if (preg_match($find, $text) &&
                (!$availableCommand->getMentionOnly() || $botMention)) {
                return $availableCommand;
            }
        }

        return null;
    }
}


================================================
FILE: src/PhpSlackBot/Command/BaseCommand.php
================================================
<?php
namespace PhpSlackBot\Command;

abstract class BaseCommand extends \PhpSlackBot\Base
{

    public function executeCommand($message, $context)
    {
        return $this->execute($message, $context);
    }
}


================================================
FILE: src/PhpSlackBot/Command/CountCommand.php
================================================
<?php
namespace PhpSlackBot\Command;

class CountCommand extends BaseCommand
{

    private $count = 0;

    protected function configure()
    {
        $this->setName('count');
    }

    protected function execute($message, $context)
    {
        $this->send($this->getCurrentChannel(), null, $this->count);
        $this->count++;
    }
}


================================================
FILE: src/PhpSlackBot/Command/DateCommand.php
================================================
<?php
namespace PhpSlackBot\Command;

class DateCommand extends BaseCommand
{

    protected function configure()
    {
        $this->setName('date');
    }

    protected function execute($message, $context)
    {
        $this->send($this->getCurrentChannel(), null, date("D M j G:i:s T Y"));
    }
}


================================================
FILE: src/PhpSlackBot/Command/PingPongCommand.php
================================================
<?php
namespace PhpSlackBot\Command;

class PingPongCommand extends BaseCommand
{

    protected function configure()
    {
        $this->setName('ping');
    }

    protected function execute($message, $context)
    {
        $this->send($this->getCurrentChannel(), $this->getCurrentUser(), 'Pong');
    }
}


================================================
FILE: src/PhpSlackBot/Command/PokerPlanningCommand.php
================================================
<?php
namespace PhpSlackBot\Command;

class PokerPlanningCommand extends BaseCommand
{

    private $count = 0;
    private $initiator;
    private $scores = array();
    private $status = 'free';

    protected function configure()
    {
        $this->setName('pokerp');
    }

    protected function execute($message, $context)
    {
        $args = $this->getArgs($message);
        $command = isset($args[1]) ? $args[1] : '';

        switch ($command) {
            case 'start':
                $this->start($args);
                break;
            case 'status':
                $this->status();
                break;
            case 'vote':
                $this->vote($args);
                break;
            case 'end':
                $this->end();
                break;
            default:
                $this->send(
                    $this->getCurrentChannel(),
                    $this->getCurrentUser(),
                    'No comprendo. Use "'.$this->getName().' start" or "'.$this->getName().' status"'
                );
        }
    }

    private function start($args)
    {
        if ($this->status == 'free') {
            $this->subject = isset($args[2]) ? $args[2] : null;
            if (!is_null($this->subject)) {
                $this->subject = str_replace(array('<', '>'), '', $this->subject);
            }
            $this->status = 'running';
            $this->initiator = $this->getCurrentUser();
            $this->scores = array();
            $this->send(
                $this->getCurrentChannel(),
                null,
                'Poker planning sessions start by '.$this->getUserNameFromUserId($this->initiator)."\n".
                'Please vote'.(!is_null($this->subject) ? ' for '.$this->subject : '')
            );
            $this->send(
                $this->getCurrentChannel(),
                $this->getCurrentUser(),
                'Use "'.$this->getName().' end" to end the session'
            );
        } else {
            $this->send(
                $this->getCurrentChannel(),
                $this->getCurrentUser(),
                'A poker session is still active'
            );
        }
    }

    private function status()
    {
        $message = 'Current status : '.$this->status;
        if ($this->status == 'running') {
            $message .= "\n".'Initiator : '.$this->getUserNameFromUserId($this->initiator);
        }
        $this->send($this->getCurrentChannel(), null, $message);
        if ($this->status == 'running') {
            if (empty($this->scores)) {
                $this->send($this->getCurrentChannel(), null, 'No one has voted yet');
            } else {
                $message = '';
                foreach ($this->scores as $user => $score) {
                    $message .= $this->getUserNameFromUserId($user).' has voted'."\n";
                }
                $this->send($this->getCurrentChannel(), null, $message);
            }
        }
    }

    private function vote($args)
    {
        if ($this->status == 'running') {
            $score = isset($args[2]) ? $args[2] : -1;
            $sequence = $this->getSequence();
            if (!in_array($score, $sequence)) {
                $this->send(
                    $this->getCurrentChannel(),
                    $this->getCurrentUser(),
                    'Use "'.$this->getName().' vote [number]". Choose [number] between '.implode(', ', $sequence)
                );
            } else {
                $this->scores[$this->getCurrentUser()] = (int) $score;
                $this->send(
                    $this->getCurrentChannel(),
                    $this->getCurrentUser(),
                    'Thank you! Your vote ('.$score.
                    ') has been recorded You can still change your vote until the end of the session'
                );
            }
        } else {
            $this->send(
                $this->getCurrentChannel(),
                $this->getCurrentUser(),
                'There is no poker session. You can start one with "'.$this->getName().' start"'
            );
        }
    }

    private function end()
    {
        if ($this->status == 'running') {
            if ($this->getCurrentUser() == $this->initiator) {
                $message = 'Ending session'.
                    (!is_null($this->subject) ? ' for '.$this->subject : '')."\n".'Results : '."\n";
                if (empty($this->scores)) {
                    $message .= 'No vote !';
                } else {
                    foreach ($this->scores as $user => $score) {
                        $message .= $this->getUserNameFromUserId($user).' => '.$score."\n";
                    }
                    $message .= '------------------'."\n";
                    $message .= 'Average score : '.$this->getAverageScore()."\n";
                    $message .= 'Median score : '.$this->getMedianScore()."\n";
                    $message .= 'Max score : '.$this->getMaxScore()."\n";
                    $message .= 'Min score : '.$this->getMinScore();
                }
                $this->send($this->getCurrentChannel(), null, $message);
                $this->status = 'free';
            } else {
                $this->send(
                    $this->getCurrentChannel(),
                    $this->getCurrentUser(),
                    'Only '.$this->getUserNameFromUserId($this->initiator).' can end the session'
                );
            }
        } else {
            $this->send(
                $this->getCurrentChannel(),
                $this->getCurrentUser(),
                'There is no poker session. You can start one with "'.$this->getName().' start"'
            );
        }
    }

    private function getArgs($message)
    {
        $args = array();
        if (isset($message['text'])) {
            $args = array_values(array_filter(explode(' ', $message['text'])));
        }
        $commandName = $this->getName();
        // Remove args which are before the command name
        $finalArgs = array();
        $remove = true;
        foreach ($args as $arg) {
            if ($commandName == $arg) {
                $remove = false;
            }
            if (!$remove) {
                $finalArgs[] = $arg;
            }
        }
        return $finalArgs;
    }

    private function getAverageScore()
    {
        return array_sum($this->scores) / count($this->scores);
    }

    private function getMedianScore()
    {
        $arr = $this->scores;
        sort($arr);
        $count = count($arr);
        $middleval = floor(($count-1)/2);
        if ($count % 2) {
            $median = $arr[$middleval];
        } else {
            $low = $arr[$middleval];
            $high = $arr[$middleval+1];
            $median = (($low+$high)/2);
        }
        return $median;
    }

    private function getSequence()
    {
        return array(0, 1, 2, 3, 5, 8, 13, 20, 40, 100);
    }

    private function getMaxScore()
    {
        return max($this->scores);
    }

    private function getMinScore()
    {
        return min($this->scores);
    }
}


================================================
FILE: src/PhpSlackBot/Webhook/BaseWebhook.php
================================================
<?php
namespace PhpSlackBot\Webhook;

abstract class BaseWebhook extends \PhpSlackBot\Base
{

    public function executeWebhook($payload, $context)
    {
        return $this->execute($payload, $context);
    }
}


================================================
FILE: src/PhpSlackBot/Webhook/OutputWebhook.php
================================================
<?php
namespace PhpSlackBot\Webhook;

class OutputWebhook extends BaseWebhook
{

    protected function configure()
    {
        $this->setName('output');
    }

    protected function execute($payload, $context)
    {
        $payload['channel'] = $this->getChannelIdFromChannelName($payload['channel']);
        $this->getClient()->send(json_encode($payload));
    }
}