Facebook.php

<?php

require_once(str_replace('//','/',dirname(__FILE__).'/') .'../models/UsersFacebookStore.php');
require_once(str_replace('//','/',dirname(__FILE__).'/') .'../controllers/UsersGoal.php');
require_once(str_replace('//','/',dirname(__FILE__).'/') .'../controllers/User.class.php');
require_once(str_replace('//','/',dirname(__FILE__).'/') .'../helpers/URL.php');

/**
 * @owner Josh Smith <[email protected]>
 *
 * @package Controllers
 */
class UsersFacebook
{
  public $usersFacebookStore;
  
  public function __construct()
  {
    $this->usersFacebookStore = new UsersFacebookStore();
  }
  
  /**
   * Adds an access token
   * @param int $uid User's id
   * @param int $facebook_uid Facebook uid
   * @param string $token Access token
   *
   * @return bool True if add succeeded, false otherwise
   */
  public function addAccessToken($uid, $facebook_uid, $token)
  {
    if($this->usersFacebookStore->addAccessToken($uid, $facebook_uid, $token)) {
      return true;
    }
  }
  
  /**
   * Gets a user's Facebook info
   * @param int $uid uid
   *
   * @return array Array of info containing uid, Facebook uid, and access_token
   */   
  public function getFacebookInfo($uid)
  {
    $array = $this->usersFacebookStore->getFacebookInfo($uid);
    return $array;
  }
  
  /**
   * Publicly accessible method for posting to a user's wall
   * @param int $uid User's ID
   * @param string $type Type of activity/name of function (e.g. addedGoal)
   * @param int $activity_id Activity ID (e.g. goal_id for goal)
   *
   * @return string REST response from Graph API
   */
  public function postToWall($uid, $type, $activity_id)
  {
    $fbArray = $this->getFacebookInfo($uid);
    $token = $fbArray['access_token'];
    $facebookUid = $fbArray['facebook_uid'];
    
    // Check that the token's not null
    if(is_null($token)) {
      return false;
    }
    
    $url = 'https://graph.facebook.com/' . $facebookUid . '/feed?access_token=' . $token;
    
    $response = $this->$type($uid, $url, $activity_id);
    
    return $response;
  }
  
  /**
   * Posts 'added goal' to FB Wall
   * @param int $uid User's ID
   * @param string $url Base URL for Graph
   * @param int $goal_id Goal ID
   *
   * @return string REST Response from Graph API
   */
  protected function addedGoal($uid, $url, $goal_id)
  {
    // Get the goal
    $usersGoal = new UsersGoal();
    $goalArray = $usersGoal->getGoal($goal_id);
    
    // Generate the link
    $URL = new URL();
    $slug = $URL->generateSlug($goalArray['title']);
    $link = 'http://www.goals.com/support/' . $goal_id . '/' . $slug;
    
    // Get the user's first name
    $user = new User();
    $userArray = $user->getUserArray($uid);
    $first_name = $userArray[0]['first_name'];
  
    // Set the photo URL, link text, description, and action link
    $photoUrl = 'http://static.goalscdn.com/img/goalswhiteback.png';
    $linkText = $first_name . ' added a goal: ' . $goalArray['title'];
    $description = 'Click "Support" below to show your support.';
    $actionsJSON = '[{"name": "Support", "link": "' . $link . '"}]';
    
    // Set the parameters
    $params = 'picture=' . $photoUrl . '&link=' . $link . '&name=' . $linkText;
    $params .= '&description=' . $description . '&actions=' . $actionsJSON;
    
    // Execute cURL
    $response = $this->doCurl($url, $params);

    return $response;
  }
  
  /**
   * Posts 'made progress' to FB Wall
   * @param int $uid User's ID
   * @param string $url Base URL for Graph
   * @param int $goal_id Goal ID
   *
   * @return string REST Response from Graph API
   */
  protected function madeProgress($uid, $url, $goal_id)
  {
    // Get the goal
    $usersGoal = new UsersGoal();
    $goalArray = $usersGoal->getGoal($goal_id);
    
    // Generate the link
    $URL = new URL();
    $slug = $URL->generateSlug($goalArray['title']);
    $link = 'http://www.goals.com/support/' . $goal_id . '/' . $slug;
    
    // Get the user's first name
    $user = new User();
    $userArray = $user->getUserArray($uid);
    $first_name = $userArray[0]['first_name'];
  
    // Set the photo URL, link text, description, and action link
    $photoUrl = 'http://static.goalscdn.com/img/goalswhiteback.png';
    $linkText = $first_name . ' added a goal: ' . $goalArray['title'];
    $description = 'Click "Support" below to show your support.';
    $actionsJSON = '[{"name": "Support", "link": "' . $link . '"}]';
    
    // Set the parameters
    $params = 'picture=' . $photoUrl . '&link=' . $link . '&name=' . $linkText;
    $params .= '&description=' . $description . '&actions=' . $actionsJSON;
    
    // Execute cURL
    $response = $this->doCurl($url, $params);

    return $response;
  }
  
  /**
   * Executes cURL for getting REST response from Graph
   * @param string $url Base url
   * @param string $params Params for Graph
   *
   * @return string $response REST Response from Graph
   */
  protected function doCurl($url, $params)
  {
    // Get the curl session object
    $curl = curl_init($url);
     
    // Tell curl to use HTTP POST
    curl_setopt ($curl, CURLOPT_POST, true);
    // Tell curl that this is the body of the POST
    curl_setopt ($curl, CURLOPT_POSTFIELDS, $params);
    // Tell curl not to return headers, but do return the response
    curl_setopt($curl, CURLOPT_HEADER, false);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    
    $response = curl_exec($curl);
    curl_close($curl); 
    
    return $response;
  }
}