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<?php
/**
 * Elgg profile plugin
 *
 * @package ElggProfile
 */

elgg_register_event_handler('init', 'system', 'profile_init', 1);

/**
 * Profile init function
 */
function profile_init() {

	// Register a URL handler for users - this means that profile_url()
	// will dictate the URL for all ElggUser objects
	elgg_register_entity_url_handler('user', 'all', 'profile_url');

	// Metadata on users needs to be independent
	register_metadata_as_independent('user');

	elgg_register_simplecache_view('icon/user/default/tiny');
	elgg_register_simplecache_view('icon/user/default/topbar');
	elgg_register_simplecache_view('icon/user/default/small');
	elgg_register_simplecache_view('icon/user/default/medium');
	elgg_register_simplecache_view('icon/user/default/large');
	elgg_register_simplecache_view('icon/user/default/master');

	// Register a page handler, so we can have nice URLs
	elgg_register_page_handler('profile', 'profile_page_handler');

	elgg_extend_view('html_head/extend', 'profile/metatags');
	elgg_extend_view('css/elgg', 'profile/css');

	// allow ECML in parts of the profile
	elgg_register_plugin_hook_handler('get_views', 'ecml', 'profile_ecml_views_hook');

	// allow admins to set default widgets for users on profiles
	elgg_register_plugin_hook_handler('get_list', 'default_widgets', 'profile_default_widgets_hook');
}

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

	if (isset($page[0])) {
		$username = $page[0];
		$user = get_user_by_username($username);
		elgg_set_page_owner_guid($user->guid);
	}

	// short circuit if invalid or banned username
	if (!$user || ($user->isBanned() && !elgg_is_admin_logged_in())) {
		register_error(elgg_echo('profile:notfound'));
		forward();
	}

	$action = NULL;
	if (isset($page[1])) {
		$action = $page[1];
	}

	if ($action == 'edit') {
		// use the core profile edit page
		$base_dir = elgg_get_root_dir();
		require "{$base_dir}pages/profile/edit.php";
		return;
	}

	// main profile page
	$params = array(
		'content' => elgg_view('profile/wrapper'),
		'num_columns' => 3,
	);
	$content = elgg_view_layout('widgets', $params);

	$body = elgg_view_layout('one_column', array('content' => $content));
	echo elgg_view_page($title, $body);
}

/**
 * Profile URL generator for $user->getUrl();
 *
 * @param ElggUser $user
 * @return string User URL
 */
function profile_url($user) {
	return elgg_get_site_url() . "pg/profile/" . $user->username;
}

/**
 * Parse ECML on parts of the profile
 *
 * @param unknown_type $hook
 * @param unknown_type $entity_type
 * @param unknown_type $return_value
 * @param unknown_type $params
 */
function profile_ecml_views_hook($hook, $entity_type, $return_value, $params) {
	$return_value['profile/profile_content'] = elgg_echo('profile');

	return $return_value;
}

/**
 * Register profile widgets with default widgets
 *
 * @param unknown_type $hook
 * @param unknown_type $type
 * @param unknown_type $return
 * @param unknown_type $params
 * @return array
 */
function profile_default_widgets_hook($hook, $type, $return, $params) {
	$return[] = array(
		'name' => elgg_echo('profile'),
		'widget_context' => 'profile',
		'widget_columns' => 3,

		'event' => 'create',
		'entity_type' => 'user',
		'entity_subtype' => ELGG_ENTITIES_ANY_VALUE,
	);

	return $return;
}