coffee_class.php

<?php
/**
 * Simple abstraction of Slack API
 *
 * Uses curl, if not falls back to file_get_contents and HTTP stream.
 *
 * For all api methods, refer to https://api.slack.com/
 *
 * @author  Yong Zhen <yz@stargate.io>
 * @version  1.0.0
 */
class Slack {

  private $api_token;
  private $api_endpoint = 'https://slack.com/api/<method>';

  /**
   * Create a new instance
   * @param string $api_token Your Slack api bearer token
   */
  function __construct($api_token){
    $this->api_token = $api_token;
  }

  /**
   * Calls an API method. You don't have to pass in the token, it will automatically be included.
   * @param  string  $method  The API method to call.
   * @param  array   $args    An associative array of arguments to pass to the API.
   * @param  integer $timeout Set maximum time the request is allowed to take, in seconds.
   * @return array           The response as an associative array, JSON-decoded.
   */
  public function call($method, $args = array(), $timeout = 10){
    return $this->request($method, $args, $timeout);
  }

  /**
   * Performs the underlying HTTP request.
   * @param  string  $method  The API method to call.
   * @param  array   $args    An associative array of arguments to pass to the API.
   * @param  integer $timeout Set maximum time the request is allowed to take, in seconds.
   * @return array           The response as an associative array, JSON-decoded.
   */
  private function request($method, $args = array(), $timeout = 10){
    $url = str_replace('<method>', $method, $this->api_endpoint);
    $args['token'] = $this->api_token;

    if (function_exists('curl_version')){
      $ch = curl_init();
      curl_setopt($ch, CURLOPT_URL, $url);
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
      curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);
      curl_setopt($ch, CURLOPT_POST, true);
      curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
      curl_setopt($ch, CURLOPT_POSTFIELDS, $args);
      $result = curl_exec($ch);
      curl_close($ch);
    } else {
      $post_data = http_build_query($args);
      $result    = file_get_contents($url, false, stream_context_create(array(
        'http' => array(
          'protocol_version' => 1.1,
          'method'           => 'POST',
          'header'           => "Content-type: application/x-www-form-urlencoded\r\n" .
                                "Content-length: " . strlen($post_data) . "\r\n" .
                                "Connection: close\r\n",
          'content'          => $post_data
        ),
      )));
    }

    return $result ? json_decode($result, true) : false;
  }
}