<?php

/**
* @package   com_zoo
* @author    YOOtheme http://www.yootheme.com
* @copyright Copyright (C) YOOtheme GmbH
* @license   http://www.gnu.org/licenses/gpl.html GNU/GPL
*/


/**

 * Class that represents an Author of a comment

 *

 * @package Component.Classes

 */

class CommentAuthor {



	/**

	 * A reference to the global App object

	 *

	 * @var App

	 * @since 2.0

	 */

	public $app;



	/**

	 *

	 * The referenced application

	 *

	 * @var Application

	 */

	public $application;



	/**

	 * The name of the Author

	 *

	 * @var string

	 * @since 2.0

	 */

	public $name;



	/**

	 * The email of the author

	 *

	 * @var string

	 * @since 2.0

	 */

	public $email;



	/**

	 * The url of the author

	 *

	 * @var string

	 * @since 2.0

	 */

	public $url;



	/**

	 * The id of the user that made the comment

	 *

	 * @var int

	 * @since 2.0

	 */

	public $user_id;



	/**

	 * Class Constructor

	 *

	 * @param string $name    The name of the author

	 * @param string $email   The email of the author

	 * @param string $url     The url of the author

	 * @param string $user_id The id of the user linked to the author

	 */

	public function __construct($name = '', $email = '', $url = '', $user_id = '', $application = null) {



		// set vars

		$this->name		   = $name;

		$this->email	   = $email;

		$this->url		   = $url;

		$this->user_id	   = $user_id;

		$this->application = $application;

	}



	/**

	 * Get a user avatar from Gravatar or use the default avatar

	 *

	 * @param  int $size Size in pixels of the avatar (squared). Default: 32

	 *

	 * @return string        The html tag img showing the avatar+

	 *

	 * @since 2.0

	 */

	public function getAvatar($size = 32) {

		$default = JURI::root().'media/zoo/assets/images/avatar.png';



		if ($this->email) {

			return '<img title="'.$this->name.'" src="http://www.gravatar.com/avatar/'.md5($this->app->string->strtolower($this->email)).'?s='.$size.'&amp;d='.$default.'" height="'.$size.'" width="'.$size.'" alt="'.$this->name.'" />';

		} else {

			return '<img title="'.$this->name.'" src="'.$default.'" height="'.$size.'" width="'.$size.'" alt="'.$this->name.'" />';

		}

	}



	/**

	 * Check the if the author is a guest

	 *

	 * @return boolean True if the user is not logged in

	 *

	 * @since 2.0

	 */

	public function isGuest() {

		return empty($this->user_id);

	}



	/**

	 * Check if the author is a joomla admin

	 *

	 * @return boolean True if the user is an admin

	 *

	 * @since 2.0

	 */

	public function isJoomlaAdmin() {

		return false;

	}



	/**

	 * Get the user type

	 *

	 * @return string The type of the user

	 *

	 * @since 2.0

	 */

	public function getUserType() {

		return strtolower(str_replace('CommentAuthor', '', get_class($this)));

	}



}



/**

 * Class representing an auhtor which is a Joomla User

 *

 * @package Component.Classes

 */

class CommentAuthorJoomla extends CommentAuthor {



	/**

	 * Get the related JUser object

	 *

	 * @return JUser The joomla user

	 *

	 * @since 2.0

	 */

	public function getJoomlaUser() {

		return $this->app->user->get($this->user_id);

	}



	/**

	 * Check if the joomla user is an admin

	 *

	 * @return boolean If the user is an admin

	 *

	 * @since 2.0

	 */

	public function isJoomlaAdmin() {

		if ($user = $this->getJoomlaUser()) {

			return $this->app->user->isJoomlaAdmin($user);

		}

		return false;

	}



}



/**

 * Class that represents an author that has logged in through facebook

 *

 * @package Component.Classes

 */

class CommentAuthorFacebook extends CommentAuthor {



	/**

	 * Get the avatar from facebook

	 *

	 * @param  integer $size The size in pixels (squared). Default: 32

	 *

	 * @return string        The html img tag with the avatar

	 *

	 * @since 2.0

	 */

	public function getAvatar($size = 32) {



		if ($this->user_id) {



			$cache 		 = $this->app->cache->create($this->app->path->path('cache:') . '/author_cache', true, 604800);

			$cache_check = ($cache) ? $cache->check() : false;

			$url 		 = '';



			// try to get avatar url from cache

			if ($cache_check) {

				$url = $cache->get($this->user_id);

			}



			// if url is empty, try to get avatar url from twitter

			if (empty($url)) {

				$info = $this->app->facebook->fields($this->user_id, array('picture'), $this->application);

				if (isset($info['picture'])) {

					$url = $info['picture'];

				}

				if ($cache_check) {

					$cache->set($this->user_id, $url);

					$cache->save();

				}

			}



			if (!empty($url)) {

				return '<img alt="'.$this->name.'" title="'.$this->name.'" src="'.$url.'" height="'.$size.'" width="'.$size.'" />';

			}



		}

	    return parent::getAvatar($size);

	}



}



/**

 * Class that represents an author that has logged in using Twitter

 *

 * @package Component.Classes

 */

class CommentAuthorTwitter extends CommentAuthor {



	/**

	 * Get the avatar from twitter

	 *

	 * @param  integer $size The size of the avatar (squared). Default: 32

	 *

	 * @return string        The html img tag

	 *

	 * @since 2.0

	 */

	public function getAvatar($size = 32) {

		if ($this->user_id) {



			$cache 		 = $this->app->cache->create($this->app->path->path('cache:') . '/author_cache', true, 604800);

			$cache_check = ($cache) ? $cache->check() : false;

			$url 		 = '';



			// try to get avatar url from cache

			if ($cache_check) {

				$url = $cache->get($this->user_id);

			}



			// if url is empty, try to get avatar url from twitter

			if (empty($url)) {

				$info = $this->app->twitter->fields($this->user_id, array('profile_image_url'), $this->application);

				if (isset($info['profile_image_url'])) {

					$url = $info['profile_image_url'];

				}

				if ($cache_check) {

					$cache->set($this->user_id, $url)->save();

				}

			}



			if (!empty($url)) {

				return '<img alt="'.$this->name.'" title="'.$this->name.'" src="'.$url.'" height="'.$size.'" width="'.$size.'" />';

			}



		}

	    return parent::getAvatar($size);

	}



}