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<?php
/**
 * Elgg tidypics
 *
 */

// set some simple defines
define('TP_OLD_ALBUM', 0);
define('TP_NEW_ALBUM', 1);

// include core libraries
include dirname(__FILE__) . "/lib/tidypics.php";
include dirname(__FILE__) . "/lib/image.php";
include dirname(__FILE__) . "/lib/album.php";

/**
 * tidypics plugin initialisation functions.
 */
function tidypics_init() {
	global $CONFIG;

	// Set up menu for logged in users
	if (isloggedin()) {
		add_menu(elgg_echo('photos'), $CONFIG->wwwroot . "pg/photos/owned/" . $_SESSION['user']->username);
	}

	// Extend CSS
	extend_view('css', 'tidypics/css');

	// Extend hover-over and profile menu
	extend_view('profile/menu/links','tidypics/hover_menu');

	//group view  ** psuedo widget view for group pages**
	extend_view('groups/right_column','tidypics/groupprofile_albums');

	// rss extensions
	extend_view('extensions/xmlns', 'extensions/tidypics/xmlns');
	extend_view('extensions/channel', 'extensions/tidypics/channel');

	// Register a page handler, so we can have nice URLs
	register_page_handler('photos','tidypics_page_handler');

	// Add a new tidypics widget
	add_widget_type('album_view', elgg_echo("tidypics:widget:albums"), elgg_echo("tidypics:widget:album_descr"), 'profile');
	add_widget_type('latest_photos', elgg_echo("tidypics:widget:latest"), elgg_echo("tidypics:widget:latest_descr"), 'profile');

	// Register a URL handler for files
	register_entity_url_handler('tidypics_image_url', 'object', 'image');
	register_entity_url_handler('tidypics_album_url', 'object', 'album');

	// add the class files for image and album
	add_subtype("object", "image", "TidypicsImage");
	add_subtype("object", "album", "TidypicsAlbum");

	// Register entity type
	register_entity_type('object','image');
	register_entity_type('object','album');

	if (function_exists('add_group_tool_option')) {
		add_group_tool_option('photos', elgg_echo('tidypics:enablephotos'), true);
	}

	if (get_plugin_setting('grp_perm_override', 'tidypics') != "disabled") {
		register_plugin_hook('permissions_check', 'object', 'tidypics_permission_override');
	}

	// Register for notifications
	if (is_callable('register_notification_object')) {
		register_notification_object('object', 'album', elgg_echo('tidypics:newalbum'));

		register_plugin_hook('notify:entity:message', 'object', 'tidypics_notify_message');
	}

	// slideshow plugin hook
	register_plugin_hook('tp_slideshow', 'album', 'tidypics_slideshow');
}

/**
 * Sets up sidebar menus for tidypics.  Triggered on pagesetup.
 */
function tidypics_submenus() {

	global $CONFIG;

	$page_owner = page_owner_entity();

	if ($page_owner instanceof ElggGroup) {
		if (get_context() == "groups") {
			if ($page_owner->photos_enable != "no") {
				add_submenu_item(	sprintf(elgg_echo('album:group'),$page_owner->name),
						$CONFIG->wwwroot . "pg/photos/owned/" . $page_owner->username);
			}
		}
	}
	// context is only set to photos on individual pages, not on group pages
	else if (get_context() == "photos") {

		$view_count = get_plugin_setting('view_count', 'tidypics');

		// owner gets "your albumn", "your friends albums", "your most recent", "your most viewed"
		if (get_loggedin_userid() && get_loggedin_userid() == $page_owner->guid) {

			add_submenu_item(	elgg_echo('album:create'),
					$CONFIG->wwwroot . "pg/photos/new/{$page_owner->username}/",
					'tidypics-a' );

			add_submenu_item(	elgg_echo("album:yours"),
					$CONFIG->wwwroot . "pg/photos/owned/{$page_owner->username}/",
					'tidypics-a' );

			add_submenu_item( 	elgg_echo('album:yours:friends'),
					$CONFIG->wwwroot . "pg/photos/friends/{$page_owner->username}/",
					'tidypics-a');

			add_submenu_item(	elgg_echo('tidypics:yourmostrecent'),
					$CONFIG->wwwroot . "pg/photos/mostrecent/{$page_owner->username}/",
					'tidypics-a');

			if ($view_count != 'disabled') {
				add_submenu_item(	elgg_echo('tidypics:yourmostviewed'),
						$CONFIG->wwwroot . "pg/photos/mostviewed/{$page_owner->username}/",
						'tidypics-a');
			}

		} else if (isloggedin()) {

			$user = get_loggedin_user();

			// logged in not owner gets "page owners albums", "page owner's friends albums", "page owner's most viewed", "page owner's most recent"
			// and then "your albums", "your most recent", "your most viewed"
			add_submenu_item(	elgg_echo("album:yours"),
					$CONFIG->wwwroot . "pg/photos/owned/{$user->username}/",
					'tidypics-b' );

			add_submenu_item(	elgg_echo('tidypics:yourmostrecent'),
					$CONFIG->wwwroot . "pg/photos/mostrecent/{$user->username}/",
					'tidypics-b');

			if ($view_count != 'disabled') {
				add_submenu_item(	elgg_echo('tidypics:yourmostviewed'),
						$CONFIG->wwwroot . "pg/photos/mostviewed/{$user->username}/",
						'tidypics-b');
			}

			if ($page_owner->name) { // check to make sure the owner set their display name
				add_submenu_item(	sprintf(elgg_echo("album:user"), $page_owner->name),
						$CONFIG->wwwroot . "pg/photos/owned/{$page_owner->username}/",
						'tidypics-a' );
				add_submenu_item( 	sprintf(elgg_echo('album:friends'),$page_owner->name),
						$CONFIG->wwwroot . "pg/photos/friends/{$page_owner->username}/",
						'tidypics-a');

				if ($view_count != 'disabled') {
					add_submenu_item( 	sprintf(elgg_echo('tidypics:friendmostviewed'),$page_owner->name),
							$CONFIG->wwwroot . "pg/photos/mostviewed/{$page_owner->username}/",
							'tidypics-a');
				}

				add_submenu_item( 	sprintf(elgg_echo('tidypics:friendmostrecent'),$page_owner->name),
						$CONFIG->wwwroot . "pg/photos/mostrecent/{$page_owner->username}/",
						'tidypics-a');
			}
		} else if ($page_owner->guid) {
			// non logged in user gets "page owners albums", "page owner's friends albums"
			add_submenu_item(	sprintf(elgg_echo("album:user"), $page_owner->name),
					$CONFIG->wwwroot . "pg/photos/owned/{$page_owner->username}/",
					'tidypics-a' );
			add_submenu_item( 	sprintf(elgg_echo('album:friends'),$page_owner->name),
					$CONFIG->wwwroot . "pg/photos/friends/{$page_owner->username}/",
					'tidypics-a');
		}

		// everyone gets world albums, most recent, most viewed, most recently viewed, recently commented
		add_submenu_item(	elgg_echo('album:all'),
				$CONFIG->wwwroot . "pg/photos/world/",
				'tidypics-z');
		add_submenu_item(	elgg_echo('tidypics:mostrecent'),
				$CONFIG->wwwroot . 'pg/photos/mostrecent/',
				'tidypics-z');

		if ($view_count != 'disabled') {
			add_submenu_item(	elgg_echo('tidypics:mostviewed'),
					$CONFIG->wwwroot . 'pg/photos/mostviewed/',
					'tidypics-z');
			add_submenu_item(	elgg_echo('tidypics:recentlyviewed'),
					$CONFIG->wwwroot . 'pg/photos/recentlyviewed/',
					'tidypics-z');
		}
		add_submenu_item(	elgg_echo('tidypics:recentlycommented'),
				$CONFIG->wwwroot . 'pg/photos/recentlycommented/',
				'tidypics-z');
		/*
			add_submenu_item(	'Flickr Integration',
								$CONFIG->wwwroot . 'mod/tidypics/pages/flickr/setup.php',
								'tidypics-z');
		*/
	}

}

/**
 * Sets up tidypics admin menu. Triggered on pagesetup.
 */
function tidypics_adminmenu() {
	global $CONFIG;

	if (get_context() == 'admin' && isadminloggedin()) {
		add_submenu_item(elgg_echo('tidypics:administration'), $CONFIG->url . "mod/tidypics/pages/admin.php");
	}
}

/**
 * Sets up submenus for tidypics most viewed pages
 */
function tidypics_mostviewed_submenus() {

	global $CONFIG;

	add_submenu_item(elgg_echo('tidypics:mostvieweddashboard'), $CONFIG->url . "mod/tidypics/mostvieweddashboard.php");
	add_submenu_item(elgg_echo('tidypics:mostviewedthisyear'), $CONFIG->url . "mod/tidypics/pages/lists/mostviewedimagesthisyear.php");
	add_submenu_item(elgg_echo('tidypics:mostviewedthismonth'), $CONFIG->url . "mod/tidypics/pages/lists/mostviewedimagesthismonth.php");
	add_submenu_item(elgg_echo('tidypics:mostviewedlastmonth'), $CONFIG->url . "mod/tidypics/pages/lists/mostviewedimageslastmonth.php");
	add_submenu_item(elgg_echo('tidypics:mostviewedtoday'), $CONFIG->url . "mod/tidypics/pages/lists/mostviewedimagestoday.php");
	add_submenu_item(elgg_echo('tidypics:mostcommented'), $CONFIG->url . "mod/tidypics/pages/lists/mostcommentedimages.php");
	add_submenu_item(elgg_echo('tidypics:mostcommentedthismonth'), $CONFIG->url . "mod/tidypics/pages/lists/mostcommentedimagesthismonth.php");
	add_submenu_item(elgg_echo('tidypics:mostcommentedtoday'), $CONFIG->url . "mod/tidypics/pages/lists/mostcommentedimagestoday.php");
	add_submenu_item(elgg_echo('tidypics:recentlycommented'), $CONFIG->wwwroot . 'pg/photos/recentlycommented/');
}

/**
 * tidypics page handler
 *
 * @param array $page Array of page elements, forwarded by the page handling mechanism
 */
function tidypics_page_handler($page) {

	global $CONFIG;

	if (isset($page[0])) {
		switch($page[0]) {
			case "owned":  //view list of albums owned by container
				if (isset($page[1])) {
					set_input('username', $page[1]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/ownedalbums.php");
				break;

			case "view": //view an image individually
				if (isset($page[1])) {
					set_input('guid', $page[1]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/viewimage.php");
				break;

			case "album": //view an album individually
				if (isset($page[1])) {
					set_input('guid', $page[1]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/viewalbum.php");
				break;

			case "new":  //create new album
				if (isset($page[1])) {
					set_input('username', $page[1]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/newalbum.php");
				break;

			case "upload": //upload images to album
				if (isset($page[1])) {
					set_input('container_guid', $page[1]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/upload.php");
				break;

			case "edit": //edit image or album
				if (isset($page[1])) {
					set_input('guid', $page[1]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/edit.php");
				break;

			case "friends": // albums of friends
				if (isset($page[1])) {
					set_input('username', $page[1]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/friends.php");
				break;

			case "world": // all site albums
				include($CONFIG->pluginspath . "tidypics/pages/world.php");
				break;

			case "download": // download an image
				if (isset($page[1])) {
					set_input('file_guid', $page[1]);
				}
				if (isset($page[2])) {
					set_input('type', $page[2]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/download.php");
				break;

			case "thumbnail": // tidypics thumbnail
				if (isset($page[1])) {
					set_input('file_guid', $page[1]);
				}
				if (isset($page[2])) {
					set_input('size', $page[2]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/thumbnail.php");
				break;

			case "tagged": // all photos tagged with user
				if (isset($page[1])) {
					set_input('guid', $page[1]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/tagged.php");
				break;

			case "mostviewed": // images with the most views
				if (isset($page[1])) {
					set_input('username', $page[1]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/lists/mostviewedimages.php");
				break;

			case "mostrecent": // images uploaded most recently
				if (isset($page[1])) {
					set_input('username', $page[1]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/lists/mostrecentimages.php");
				break;

			case "recentlyviewed": // images most recently viewed
				include($CONFIG->pluginspath . "tidypics/pages/lists/recentlyviewed.php");
				break;

			case "recentlycommented": // images with the most recent comments
				include($CONFIG->pluginspath . "tidypics/pages/lists/recentlycommented.php");
				break;

			case "highestrated": // images with the highest average rating
				include($CONFIG->pluginspath . "tidypics/pages/lists/highestrated.php");
				break;

			case "flickr":
				if (isset($page[1])) {
					set_input('username',$page[1]);
				}
				include($CONFIG->pluginspath . "tidypics/pages/flickr/setup.php");
				break;
		}
	}
	else {
		// going to all site albums if something goes wrong with the page handler
		include($CONFIG->pluginspath . "tidypics/pages/world.php");
	}

}

/**
 * Override permissions for group albums and images
 *
 */
function tidypics_permission_override($hook, $entity_type, $returnvalue, $params) {
	$entity = $params['entity'];
	$user   = $params['user'];

	if ($entity->subtype == get_subtype_id('object', 'album')) {
		// test that the user can edit the container
		return can_write_to_container(0, $entity->container_guid);
	}

	if ($entity->subtype == get_subtype_id('object', 'image')) {
		// test that the user can edit the container
		return can_write_to_container(0, $entity->container_guid);
	}
}


/**
 * Notification message handler
 */
function tidypics_notify_message($hook, $entity_type, $returnvalue, $params) {
	$entity = $params['entity'];
	$to_entity = $params['to_entity'];
	$method = $params['method'];
	if (($entity instanceof ElggEntity) && ($entity->getSubtype() == 'album')) {
		// block notification message when the album doesn't have any photos
		if ($entity->new_album == TP_NEW_ALBUM) {
			return false;
		}

		$descr = $entity->description;
		$title = $entity->title;
		$owner = $entity->getOwnerEntity();
		return sprintf(elgg_echo('album:river:created'), $owner->name) . ': ' . $title . "\n\n" . $descr . "\n\n" . $entity->getURL();
	}
	return null;
}

/**
 * Populates the ->getUrl() method for file objects
 * Registered in the init function
 *
 * @param ElggEntity $entity album/image entity
 * @return string File URL
 */
function tidypics_image_url($entity) {
	global $CONFIG;
	$title = $entity->title;
	$title = friendly_title($title);
	return $CONFIG->url . "pg/photos/view/" . $entity->getGUID() . "/" . $title;
}

function tidypics_album_url($entity) {
	global $CONFIG;
	$title = $entity->title;
	$title = friendly_title($title);
	return $CONFIG->url . "pg/photos/album/" . $entity->getGUID() . "/" . $title;
}


/**
 * Catch the plugin hook and add the default album slideshow
 *
 * @param $hook - 'tidypics:slideshow'
 * @param $entity_type - 'album'
 * @param $returnvalue - if set, return because another plugin has used the hook
 * @param $params - arry containing album entity
 * @return unknown_type
 */
function tidypics_slideshow($hook, $entity_type, $returnvalue, $params) {

	if ($returnvalue !== null) {
		// someone has already added a slideshow or requested that the slideshow is not used
		return $returnvalue;
	}

	$slideshow_link = "javascript:PicLensLite.start({maxScale:0,feedUrl:location.href+'?view=rss'})";

	// add the slideshow javascript to the header
	extend_view('metatags', 'tidypics/js/slideshow');

	return $slideshow_link;
}

function tp_mostrecentimages($max = 8, $pagination = true) {
	return list_entities("object", "image", 0, $max, false, false, $pagination);
}


// Make sure tidypics_init is called on initialization
register_elgg_event_handler('init', 'system', 'tidypics_init');
register_elgg_event_handler('pagesetup', 'system', 'tidypics_submenus');
register_elgg_event_handler('pagesetup', 'system', 'tidypics_adminmenu');

// Register actions
register_action("tidypics/settings", false, $CONFIG->pluginspath . "tidypics/actions/settings.php");
register_action("tidypics/upload", false, $CONFIG->pluginspath . "tidypics/actions/upload.php");
register_action("tidypics/addalbum", false, $CONFIG->pluginspath. "tidypics/actions/addalbum.php");
register_action("tidypics/edit", false, $CONFIG->pluginspath. "tidypics/actions/edit.php");
register_action("tidypics/delete", false, $CONFIG->pluginspath. "tidypics/actions/delete.php");
register_action("tidypics/edit_multi", false, $CONFIG->pluginspath. "tidypics/actions/edit_multi.php");
register_action("tidypics/addtag", true, $CONFIG->pluginspath . "tidypics/actions/addtag.php");
register_action("tidypics/deletetag", true, $CONFIG->pluginspath . "tidypics/actions/deletetag.php");
register_action("tidypics/flickrSetup", true, $CONFIG->pluginspath . "tidypics/actions/flickrSetup.php");