<?php
# -- BEGIN LICENSE BLOCK ---------------------------------------
#
# This file is part of Dotclear 2.
#
# Copyright (c) 2003-2013 Olivier Meunier & Association Dotclear
# Licensed under the GPL version 2.0 license.
# See LICENSE file or
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
#
# -- END LICENSE BLOCK -----------------------------------------
if (!defined('DC_RC_PATH')) { return; }

/**
* dcFavorites -- Favorites handling facilities
*
*/
class dcFavorites
{
	/** @var dcCore dotclear core instance */
	protected $core;

	/** @var array list of favorite definitions  */
	protected $fav_defs;

	/** @var dcWorkspace current favorite landing workspace */
	protected $ws;

	/** @var array list of user-defined favorite ids */
	protected $local_prefs;

	/** @var array list of globally-defined favorite ids */
	protected $global_prefs;

	/** @var array list of user preferences (either one of the 2 above, or not!) */
	protected $user_prefs;

    /**
     * Class constructor
     *
     * @param mixed  $core   dotclear core
     *
     * @access public
     *
     * @return mixed Value.
     */
	 public function __construct($core) {
		$this->core = $core;
		$this->fav_defs = new ArrayObject();
		$this->ws = $core->auth->user_prefs->addWorkspace('dashboard');
		$this->user_prefs = array();

		if ($this->ws->prefExists('favorites')) {
			$this->local_prefs = $this->ws->getLocal('favorites');
			$this->global_prefs = $this->ws->getGlobal('favorites');
			// Since we never know what user puts through user:preferences ...
			if (!is_array($this->local_prefs)) {
				$this->local_prefs = array();
			}
			if (!is_array($this->global_prefs)) {
				$this->global_prefs = array();
			}
		} else {
			// No favorite defined ? Huhu, let's go for a migration
			$this->migrateFavorites();
		}
	}


    /**
     * setup - sets up favorites, fetch user favorites (against his permissions)
     *			This method is to be called after loading plugins
	 *
     * @access public
	 *
     */
	 public function setup() {
		defaultFavorites::initDefaultFavorites($this);
		$this->legacyFavorites();
		$this->core->callBehavior('adminDashboardFavorites', $this->core, $this);
		$this->setUserPrefs();
	}

   /**
     * getFavorite - retrieves a favorite (complete description) from its id.
     *
     * @param string  $id   the favorite id, or an array having 1 key 'name' set to id, ther keys are merged to favorite.
     *
     * @access public
     *
     * @return array the favorite, false if not found (or not permitted)
     */
	public function getFavorite($p) {
		if (is_array($p)) {
			$fname=$p['name'];
			if (!isset($this->fav_defs[$fname])) {
				return false;
			}
			$fattr = $p;
			unset($fattr['name']);
			$fattr = array_merge($this->fav_defs[$fname],$fattr);
		} else {
			if (!isset($this->fav_defs[$p])) {
				return false;
			}
			$fattr = $this->fav_defs[$p];
		}
		$fattr = array_merge(array('id' => null,'class' => null),$fattr);
		if (isset($fattr['permissions'])) {
			if (is_bool($fattr['permissions']) && !$fattr['permissions'] ) {
				return false;
			}
			if (!$this->core->auth->check($fattr['permissions'],$this->core->blog->id)) {
				return false;
			}
		}
		return $fattr;
	}

   /**
     * getFavorites - retrieves a list of favorites.
     *
     * @param string  $ids   an array of ids, as defined in getFavorite.
     *
     * @access public
     *
     * @return array array of favorites, can be empty if ids are not found (or not permitted)
     */
	public function getFavorites($ids) {
		$prefs = array();
		foreach ($ids as $id) {
			$f = $this->getFavorite($id);
			if ($f !== false) {
				$prefs[$id]=$f;
			}
		}
		return $prefs;
	}

   /**
     * setUserPrefs - get user favorites from settings. These are complete favorites, not ids only
     * 				returned favorites are the first non-empty list from :
	 *				 * user-defined favorites
	 *				 * globally-defined favorites
	 *				 * a failback list "new post" (shall never be empty)
	 *				This method is called by ::setup()
     * @access protected
     *
     */
	protected function setUserPrefs() {
		$this->user_prefs = $this->getFavorites($this->local_prefs);
		if (!count($this->user_prefs)) {
			$this->user_prefs = $this->getFavorites($this->global_prefs);
		}
		if (!count($this->user_prefs)) {
			$this->user_prefs = $this->getFavorites(array('new_post'));
		}
		$u = explode('?',$_SERVER['REQUEST_URI']);
		// Loop over prefs to enable active favorites
		foreach ($this->user_prefs as $k => &$v) {
			if (isset($v['active_cb']) && is_callable($v['active_cb'])) {
				// Use callback if defined to match whether favorite is active or not
				$v['active'] = call_user_func($v['active_cb'],$u[0],$_REQUEST);
			} else {
				// Failback active detection. We test against URI name & parameters
				$v['active'] = true; // true until something proves it is false
				$u = explode('?',$v['url'],2);
				if (!preg_match('/'.preg_quote($u[0],"/").'/',$_SERVER['REQUEST_URI'])) {
					$v['active'] = false; // no URI match
				}
				if (count($u) == 2) {
					parse_str($u[1],$p);
					// test against each request parameter.
					foreach ($p as $k2 => $v2) {
						if (!isset($_REQUEST[$k2]) || $_REQUEST[$k2] !== $v2) {
							$v['active'] = false;
						}
					}
				}
			}
		}

	}

   /**
     * migrateFavorites - migrate dc < 2.6 favorites to new format
	 *
     * @access protected
     *
     */
	protected function migrateFavorites() {
		$fav_ws = $this->core->auth->user_prefs->addWorkspace('favorites');
		$this->local_prefs=array();
		$this->global_prefs=array();
		foreach ($fav_ws->dumpPrefs() as $k => $v) {
			$fav = @unserialize($v['value']);
			if (is_array($fav)) {
				if ($v['global']) {
					$this->global_prefs[] = $fav['name'];
				} else {
					$this->local_prefs[] = $fav['name'];
				}
			}
		}
		$this->ws->put('favorites',$this->global_prefs,'array','User favorites',true,true);
		$this->ws->put('favorites',$this->local_prefs);
		$this->user_prefs = $this->getFavorites($this->local_prefs);
	}


   /**
     * legacyFavorites - handle legacy favorites using adminDashboardFavs behavior
	 *
     * @access protected
     *
     */
	protected function legacyFavorites() {
		$f = new ArrayObject();
		$this->core->callBehavior('adminDashboardFavs', $this->core, $f);
		foreach ($f as $k => $v) {
			$fav = array (
				'title' => __($v[1]),
				'url' => $v[2],
				'small-icon' => $v[3],
				'large-icon' => $v[4],
				'permissions' => $v[5],
				'id' => $v[6],
				'class' => $v[7]
			);
			$this->register ($v[0], $fav);
		}

	}

   /**
     * getUserFavorites - returns favorites that correspond to current user
	 *   (may be local, global, or failback favorites)
	 *
     * @access public
     *
     * @return array array of favorites (enriched)
     */
	public function getUserFavorites() {
		return $this->user_prefs;
	}


   /**
     * getFavoriteIDs - returns user-defined or global favorites ids list
	 *					shall not be called outside preferences.php...
	 *
     * @param boolean  $global   if true, retrieve global favs, user favs otherwise
	 *
     * @access public
     *
     * @return array array of favorites ids (only ids, not enriched)
     */
	public function getFavoriteIDs ($global=false) {
		return $global?$this->global_prefs:$this->local_prefs;
	}

   /**
     * setFavoriteIDs - stores user-defined or global favorites ids list
	 *					shall not be called outside preferences.php...
	 *
     * @param array  $ids   list of fav ids
     * @param boolean  $global   if true, retrieve global favs, user favs otherwise
	 *
     * @access public
     */
	public function setFavoriteIDs($ids,$global=false) {
		$this->ws->put('favorites',$ids,'array',null,true,$global);
	}

   /**
     * getAvailableFavoritesIDs - returns all available fav ids
	 *
     * @access public
     *
     * @return array array of favorites ids (only ids, not enriched)
     */
	public function getAvailableFavoritesIDs () {
		return array_keys($this->fav_defs->getArrayCopy());
	}

   /**
     * appendMenuTitle - adds favorites section title to sidebar menu
	 *					shall not be called outside admin/prepend.php...
	 *
     * @param dcMenu  $menu   admin menu instance
	 *
     * @access public
     */
	public function appendMenuTitle($menu) {
		$menu['Favorites'] = new dcMenu('favorites-menu','My favorites');
		$menu['Favorites']->title = __('My favorites');
	}

   /**
     * appendMenu - adds favorites items title to sidebar menu
	 *					shall not be called outside admin/prepend.php...
	 *
     * @param dcMenu  $menu   admin menu instance
	 *
     * @access public
     */
	public function appendMenu($menu) {
		foreach ($this->user_prefs as $k => $v) {
			$menu['Favorites']->addItem(
				$v['title'],
				$v['url'],
				$v['small-icon'],
				$v['active'],
				true,
				$v['id'],
				$v['class'],
				true
			);
		}
	}

   /**
     * appendDashboardIcons - adds favorites icons to index page
	 *					shall not be called outside admin/index.php...
	 *
     * @param array  $icons   dashboard icon list to enrich
	 *
     * @access public
     */
	public function appendDashboardIcons($icons) {
		foreach ($this->user_prefs as $k => $v) {
			if (isset($v['dashboard_cb']) && is_callable($v['dashboard_cb'])) {
				$v = new ArrayObject($v);
				call_user_func($v['dashboard_cb'],$this->core,$v);
			}
			$icons[$k]=new ArrayObject(array($v['title'],$v['url'],$v['large-icon']));
			$this->core->callBehavior('adminDashboardFavsIcon',$this->core,$k,$icons[$k]);
		}
	}

   /**
     * register - registers a new favorite definition
	 *
     * @param string  $id   favorite id
	 * @param array  $data favorite information. Array keys are :
	 *	'title' => favorite title (localized)
	 *	'url' => favorite URL,
	 *	'small-icon' => favorite small icon (for menu)
	 *	'large-icon' => favorite large icon (for dashboard)
	 *	'permissions' => (optional) comma-separated list of permissions for thie fav, if not set : no restriction
	 *	'dashboard_cb' => (optional) callback to modify title if dynamic, if not set : title is taken as is
	 *	'active_cb' => (optional) callback to tell whether current page matches favorite or not, for complex pages
	 *
     * @access public
     */
	public function register($id,$data) {
		$this->fav_defs[$id] = $data;
		return $this;
	}

   /**
     * registerMultiple - registers a list of favorites definition
	 *
     * @param array an array defining all favorites key is the id, value is the data.
	 *				see register method for data format
     * @access public
     */
	 public function registerMultiple($data) {
		foreach ($data as $k => $v) {
			$this->register($k,$v);
		}
		return $this;
	}

   /**
     * exists - tells whether a fav definition exists or not
	 *
     * @param string $id : the fav id to test
	 *
     * @access public
	 *
	 * @return true if the fav definition exists, false otherwise
     */
	public function exists($id) {
		return isset($this->fav_defs[$id]);
	}

}


/**
* defaultFavorites -- default favorites definition
*
*/
class defaultFavorites
{
	public static function initDefaultFavorites($favs) {
		$core =& $GLOBALS['core'];
		$favs->registerMultiple(array(
			'prefs' => array(
				'title' => __('My preferences'),
				'url' => $core->adminurl->get("admin.user.preferences"),
				'small-icon' => 'images/menu/user-pref.png',
				'large-icon' => 'images/menu/user-pref-b.png'),
			'new_post' => array(
				'title' => __('New entry'),
				'url' => $core->adminurl->get("admin.post"),
				'small-icon' => 'images/menu/edit.png',
				'large-icon' => 'images/menu/edit-b.png',
				'permissions' =>'usage,contentadmin'),
			'posts' => array(
				'title' => __('Posts'),
				'url' => $core->adminurl->get("admin.posts"),
				'small-icon' => 'images/menu/entries.png',
				'large-icon' => 'images/menu/entries-b.png',
				'permissions' => 'usage,contentadmin',
				'dashboard_cb' => array('defaultFavorites','postsDashboard')),
			'comments' => array(
				'title' => __('Comments'),
				'url' => $core->adminurl->get("admin.comments"),
				'small-icon' => 'images/menu/comments.png',
				'large-icon' => 'images/menu/comments-b.png',
				'permissions' => 'usage,contentadmin',
				'dashboard_cb' => array('defaultFavorites','commentsDashboard')),
			'search' => array(
				'title' => __('Search'),
				'url' => $core->adminurl->get("admin.search"),
				'small-icon' => 'images/menu/search.png',
				'large-icon' => 'images/menu/search-b.png',
				'permissions' => 'usage,contentadmin'),
			'categories' => array(
				'title' => __('Categories'),
				'url' => $core->adminurl->get("admin.categories"),
				'small-icon' => 'images/menu/categories.png',
				'large-icon' => 'images/menu/categories-b.png',
				'permissions' =>'categories'),
			'media' => array(
				'title' => __('Media manager'),
				'url' => $core->adminurl->get("admin.media"),
				'small-icon' => 'images/menu/media.png',
				'large-icon' => 'images/menu/media-b.png',
				'permissions' => 'media,media_admin'),
			'blog_pref' => array(
				'title' => __('Blog settings'),
				'url' => $core->adminurl->get("admin.blog.pref"),
				'small-icon' => 'images/menu/blog-pref.png',
				'large-icon' => 'images/menu/blog-pref-b.png',
				'permissions' => 'admin'),
			'blog_theme' => array(
				'title' => __('Blog appearance'),
				'url' => $core->adminurl->get("admin.blog.theme"),
				'small-icon' => 'images/menu/themes.png',
				'large-icon' => 'images/menu/blog-theme-b.png',
				'permissions' => 'admin'),
			'blogs' => array(
				'title' => __('Blogs'),
				'url' => $core->adminurl->get("admin.blogs"),
				'small-icon' => 'images/menu/blogs.png',
				'large-icon' => 'images/menu/blogs-b.png',
				'permissions' =>'usage,contentadmin'),
			'users' => array(
				'title' => __('Users'),
				'url' => $core->adminurl->get("admin.users"),
				'small-icon' => 'images/menu/users.png',
				'large-icon' => 'images/menu/users-b.png'),
			'plugins' => array(
				'title' => __('Plugins management'),
				'url' => $core->adminurl->get("admin.plugins"),
				'small-icon' => 'images/menu/plugins.png',
				'large-icon' => 'images/menu/plugins-b.png'),
			'langs' => array(
				'title' => __('Languages'),
				'url' => $core->adminurl->get("admin.langs"),
				'small-icon' => 'images/menu/langs.png',
				'large-icon' => 'images/menu/langs-b.png'),
			'help' => array(
				'title' => __('Global help'),
				'url' => $core->adminurl->get("admin.help"),
				'small-icon' => 'images/menu/help.png',
				'large-icon' => 'images/menu/help-b.png')
		));
	}

	public static function postsDashboard($core,$v)
	{
		$post_count = $core->blog->getPosts(array(),true)->f(0);
		$str_entries = __('%d post', '%d posts',$post_count);
		$v['title'] = sprintf($str_entries,$post_count);
	}

	public static function commentsDashboard($core,$v)
	{
		$comment_count = $core->blog->getComments(array(),true)->f(0);
		$str_comments = __('%d comment', '%d comments',$comment_count);
		$v['title']= sprintf($str_comments,$comment_count);
	}
}