views.php

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<?php
global $CURRENT_SYSTEM_VIEWTYPE;
$CURRENT_SYSTEM_VIEWTYPE = "";

function elgg_set_viewtype($viewtype = "") {
    global $CURRENT_SYSTEM_VIEWTYPE;

    $CURRENT_SYSTEM_VIEWTYPE = $viewtype;

    return true;
}

function elgg_get_viewtype() {
    global $CURRENT_SYSTEM_VIEWTYPE, $CONFIG;

    if ($CURRENT_SYSTEM_VIEWTYPE != "") {
        return $CURRENT_SYSTEM_VIEWTYPE;
    }

    $viewtype = get_input('view', '', false);
    if (_elgg_is_valid_viewtype($viewtype)) {
        return $viewtype;
    }

    if (isset($CONFIG->view) && _elgg_is_valid_viewtype($CONFIG->view)) {
        return $CONFIG->view;
    }

    return 'default';
}

function elgg_register_viewtype($viewtype) {
    global $CONFIG;

    if (!isset($CONFIG->view_types) || !is_array($CONFIG->view_types)) {
        $CONFIG->view_types = array();
    }

    if (!in_array($viewtype, $CONFIG->view_types)) {
        $CONFIG->view_types[] = $viewtype;
    }

    return true;
}

function elgg_is_registered_viewtype($viewtype) {
    global $CONFIG;

    if (!isset($CONFIG->view_types) || !is_array($CONFIG->view_types)) {
        return false;
    }

    return in_array($viewtype, $CONFIG->view_types);
}


function _elgg_is_valid_viewtype($viewtype) {
    if (!is_string($viewtype) || $viewtype === '') {
        return false;
    }

    if (preg_match('/\W/', $viewtype)) {
        return false;
    }

    return true;
}

function elgg_register_viewtype_fallback($viewtype) {
    _elgg_services()->views->registerViewtypeFallback($viewtype);
}

function elgg_does_viewtype_fallback($viewtype) {
    return _elgg_services()->views->doesViewtypeFallback($viewtype);
}

function elgg_register_ajax_view($view) {
    elgg_register_external_view($view, false);
}

function elgg_unregister_ajax_view($view) {
    elgg_unregister_external_view($view);
}

function elgg_register_external_view($view, $cacheable = false) {
    global $CONFIG;

    if (!isset($CONFIG->allowed_ajax_views)) {
        $CONFIG->allowed_ajax_views = array();
    }

    $CONFIG->allowed_ajax_views[$view] = true;

    if ($cacheable) {
        _elgg_services()->views->registerCacheableView($view);
    }
}

function _elgg_is_view_cacheable($view) {
    return _elgg_services()->views->isCacheableView($view);
}

function elgg_unregister_external_view($view) {
    global $CONFIG;

    if (isset($CONFIG->allowed_ajax_views[$view])) {
        unset($CONFIG->allowed_ajax_views[$view]);
    }
}

function elgg_get_view_location($view, $viewtype = '') {
    return _elgg_services()->views->getViewLocation($view, $viewtype);
}

function elgg_set_view_location($view, $location, $viewtype = '') {
    _elgg_services()->views->setViewLocation($view, $location, $viewtype);
}

function elgg_view_exists($view, $viewtype = '', $recurse = true) {
    return _elgg_services()->views->viewExists($view, $viewtype, $recurse);
}

function elgg_view($view, $vars = array(), $bypass = false, $ignored = false, $viewtype = '') {
    return _elgg_services()->views->renderView($view, $vars, $bypass, $viewtype);
}

function elgg_view_deprecated($view, array $vars, $suggestion, $version) {
    return _elgg_services()->views->renderDeprecatedView($view, $vars, $suggestion, $version);
}

function elgg_extend_view($view, $view_extension, $priority = 501, $viewtype = '') {
    _elgg_services()->views->extendView($view, $view_extension, $priority, $viewtype);
}

function elgg_unextend_view($view, $view_extension) {
    return _elgg_services()->views->unextendView($view, $view_extension);
}

function elgg_view_page($title, $body, $page_shell = 'default', $vars = array()) {

    $params = array();
    $params['identifier'] = _elgg_services()->request->getFirstUrlSegment();
    $params['segments'] = _elgg_services()->request->getUrlSegments();
    array_shift($params['segments']);
    $page_shell = elgg_trigger_plugin_hook('shell', 'page', $params, $page_shell);

    $messages = null;
    if (count_messages()) {
        // get messages - try for errors first
        $messages = system_messages(null, "error");
        if (count($messages["error"]) == 0) {
            // no errors so grab rest of messages
            $messages = system_messages(null, "");
        } else {
            // we have errors - clear out remaining messages
            system_messages(null, "");
        }
    }

    $vars['title'] = $title;
    $vars['body'] = $body;
    $vars['sysmessages'] = $messages;

    // head has keys 'title', 'metas', 'links'
    $head_params = _elgg_views_prepare_head($title);

    $vars['head'] = elgg_trigger_plugin_hook('head', 'page', $vars, $head_params);

    $vars = elgg_trigger_plugin_hook('output:before', 'page', null, $vars);
    
    // check for deprecated view
    if ($page_shell == 'default' && elgg_view_exists('pageshells/pageshell')) {
        elgg_deprecated_notice("pageshells/pageshell is deprecated by page/$page_shell", 1.8);
        $output = elgg_view('pageshells/pageshell', $vars);
    } else {
        $output = elgg_view("page/$page_shell", $vars);
    }

    $vars['page_shell'] = $page_shell;

    // Allow plugins to modify the output
    return elgg_trigger_plugin_hook('output', 'page', $vars, $output);
}

function _elgg_views_prepare_head($title) {
    $params = array(
        'links' => array(),
        'metas' => array(),
    );

    if (empty($title)) {
        $params['title'] = elgg_get_config('sitename');
    } else {
        $params['title'] = $title . ' : ' . elgg_get_config('sitename');
    }

    $params['metas']['content-type'] = array(
        'http-equiv' => 'Content-Type',
        'content' => 'text/html; charset=utf-8',
    );

    $params['metas']['description'] = array(
        'name' => 'description',
        'content' => elgg_get_config('sitedescription')
    );
    
    // https://developer.chrome.com/multidevice/android/installtohomescreen
    $params['metas']['viewport'] = array(
        'name' => 'viewport',
        'content' => 'width=device-width',
    );    
    $params['metas']['mobile-web-app-capable'] = array(
        'name' => 'mobile-web-app-capable',
        'content' => 'yes',
    );
    $params['metas']['apple-mobile-web-app-capable'] = array(
        'name' => 'apple-mobile-web-app-capable',
        'content' => 'yes',
    );
    $params['links']['apple-touch-icon'] = array(
        'rel' => 'apple-touch-icon',
        'href' => elgg_normalize_url('_graphics/favicon-128.png'),
    );

    // favicons
    $params['links']['icon-ico'] = array(
        'rel' => 'icon',
        'href' => elgg_normalize_url('_graphics/favicon.ico'),
    );
    $params['links']['icon-vector'] = array(
        'rel' => 'icon',
        'sizes' => '16x16 32x32 48x48 64x64 128x128',
        'type' => 'image/svg+xml',
        'href' => elgg_normalize_url('_graphics/favicon.svg'),
    );
    $params['links']['icon-16'] = array(
        'rel' => 'icon',
        'sizes' => '16x16',
        'type' => 'image/png',
        'href' => elgg_normalize_url('_graphics/favicon-16.png'),
    );
    $params['links']['icon-32'] = array(
        'rel' => 'icon',
        'sizes' => '32x32',
        'type' => 'image/png',
        'href' => elgg_normalize_url('_graphics/favicon-32.png'),
    );
    $params['links']['icon-64'] = array(
        'rel' => 'icon',
        'sizes' => '64x64',
        'type' => 'image/png',
        'href' => elgg_normalize_url('_graphics/favicon-64.png'),
    );
    $params['links']['icon-128'] = array(
        'rel' => 'icon',
        'sizes' => '128x128',
        'type' => 'image/png',
        'href' => elgg_normalize_url('_graphics/favicon-128.png'),
    );

    // RSS feed link
    global $autofeed;
    if (isset($autofeed) && $autofeed == true) {
        $url = current_page_url();
        if (substr_count($url,'?')) {
            $url .= "&view=rss";
        } else {
            $url .= "?view=rss";
        }
        $params['links']['rss'] = array(
            'rel' => 'alternative',
            'type' => 'application/rss+xml',
            'title' => 'RSS',
            'href' => elgg_format_url($url),
        );
    }

    return $params;
}

function elgg_view_layout($layout_name, $vars = array()) {

    $params = array();
    $params['identifier'] = _elgg_services()->request->getFirstUrlSegment();
    $params['segments'] = _elgg_services()->request->getUrlSegments();
    array_shift($params['segments']);
    $layout_name = elgg_trigger_plugin_hook('layout', 'page', $params, $layout_name);

    if (is_string($vars) || $vars === null) {
        elgg_deprecated_notice("The use of unlimited optional string arguments in elgg_view_layout() was deprecated in favor of an options array", 1.8);
        $arg = 1;
        $param_array = array();
        while ($arg < func_num_args()) {
            $param_array['area' . $arg] = func_get_arg($arg);
            $arg++;
        }
    } else {
        $param_array = $vars;
    }
    $param_array['layout'] = $layout_name;

    $params = elgg_trigger_plugin_hook('output:before', 'layout', null, $param_array);

    // check deprecated location
    if (elgg_view_exists("canvas/layouts/$layout_name")) {
        elgg_deprecated_notice("canvas/layouts/$layout_name is deprecated by page/layouts/$layout_name", 1.8);
        $output = elgg_view("canvas/layouts/$layout_name", $params);
    } elseif (elgg_view_exists("page/layouts/$layout_name")) {
        $output = elgg_view("page/layouts/$layout_name", $params);
    } else {
        $output = elgg_view("page/layouts/default", $params);
    }

    return elgg_trigger_plugin_hook('output:after', 'layout', $params, $output);
}

function elgg_view_menu($menu_name, array $vars = array()) {
    global $CONFIG;

    $vars['name'] = $menu_name;

    $sort_by = elgg_extract('sort_by', $vars, 'text');

    if (isset($CONFIG->menus[$menu_name])) {
        $menu = $CONFIG->menus[$menu_name];
    } else {
        $menu = array();
    }

    // Give plugins a chance to add menu items just before creation.
    // This supports dynamic menus (example: user_hover).
    $menu = elgg_trigger_plugin_hook('register', "menu:$menu_name", $vars, $menu);

    $builder = new \ElggMenuBuilder($menu);
    $vars['menu'] = $builder->getMenu($sort_by);
    $vars['selected_item'] = $builder->getSelected();

    // Let plugins modify the menu
    $vars['menu'] = elgg_trigger_plugin_hook('prepare', "menu:$menu_name", $vars, $vars['menu']);

    if (elgg_view_exists("navigation/menu/$menu_name")) {
        return elgg_view("navigation/menu/$menu_name", $vars);
    } else {
        return elgg_view("navigation/menu/default", $vars);
    }
}

function elgg_view_menu_item(\ElggMenuItem $item, array $vars = array()) {
    if (!isset($vars['class'])) {
        $vars['class'] = 'elgg-menu-content';
    }

    $vars = array_merge($item->getValues(), $vars);

    if ($item->getLinkClass()) {
        $vars['class'] .= ' ' . $item->getLinkClass();
    }

    if ($item->getHref() === false || $item->getHref() === null) {
        $text = $item->getText();

        // if contains elements, don't wrap
        if (preg_match('~<[a-z]~', $text)) {
            return $text;
        } else {
            return elgg_format_element('span', array('class' => 'elgg-non-link'), $text);
        }
    }

    if (!isset($vars['rel']) && !isset($vars['is_trusted'])) {
        $vars['is_trusted'] = true;
    }

    if ($item->getConfirmText()) {
        $vars['confirm'] = $item->getConfirmText();
    }

    return elgg_view('output/url', $vars);
}

function elgg_view_entity(\ElggEntity $entity, $vars = array(), $bypass = false, $debug = false) {

    // No point continuing if entity is null
    if (!$entity || !($entity instanceof \ElggEntity)) {
        return false;
    }

    global $autofeed;
    $autofeed = true;

    $defaults = array(
        'full_view' => true,
    );

    if (is_array($vars)) {
        $vars = array_merge($defaults, $vars);
    } else {
        elgg_deprecated_notice("Update your use of elgg_view_entity()", 1.8);
        $vars = array(
            'full_view' => $vars,
        );
    }

    $vars['entity'] = $entity;


    // if this entity has a view defined, use it
    $view = $entity->view;
    if (is_string($view)) {
        return elgg_view($view, $vars, $bypass, $debug);
    }

    $entity_type = $entity->getType();

    $subtype = $entity->getSubtype();
    if (empty($subtype)) {
        $subtype = 'default';
    }

    $contents = '';
    if (elgg_view_exists("$entity_type/$subtype")) {
        $contents = elgg_view("$entity_type/$subtype", $vars, $bypass, $debug);
    } else {
        $contents = elgg_view("$entity_type/default", $vars, $bypass, $debug);
    }

    // Marcus Povey 20090616 : Speculative and low impact approach for fixing #964
    if ($vars['full_view']) {
        $annotations = elgg_view_entity_annotations($entity, $vars['full_view']);

        if ($annotations) {
            $contents .= $annotations;
        }
    }
    return $contents;
}

function elgg_view_entity_icon(\ElggEntity $entity, $size = 'medium', $vars = array()) {

    // No point continuing if entity is null
    if (!$entity || !($entity instanceof \ElggEntity)) {
        return false;
    }

    $vars['entity'] = $entity;
    $vars['size'] = $size;

    $entity_type = $entity->getType();

    $subtype = $entity->getSubtype();
    if (empty($subtype)) {
        $subtype = 'default';
    }

    $contents = '';
    if (elgg_view_exists("icon/$entity_type/$subtype")) {
        $contents = elgg_view("icon/$entity_type/$subtype", $vars);
    }
    if (empty($contents)) {
        $contents = elgg_view("icon/$entity_type/default", $vars);
    }
    if (empty($contents)) {
        $contents = elgg_view("icon/default", $vars);
    }

    return $contents;
}

function elgg_view_annotation(\ElggAnnotation $annotation, array $vars = array(), $bypass = false, $debug = false) {
    global $autofeed;
    $autofeed = true;

    $defaults = array(
        'full_view' => true,
    );

    $vars = array_merge($defaults, $vars);
    $vars['annotation'] = $annotation;

    // @todo setting the view on an annotation is not advertised anywhere
    // do we want to keep this?
    $view = $annotation->view;
    if (is_string($view)) {
        return elgg_view($view, $vars, $bypass, $debug);
    }

    $name = $annotation->name;
    if (empty($name)) {
        return false;
    }

    if (elgg_view_exists("annotation/$name")) {
        return elgg_view("annotation/$name", $vars, $bypass, $debug);
    } else {
        return elgg_view("annotation/default", $vars, $bypass, $debug);
    }
}

function elgg_view_entity_list($entities, $vars = array(), $offset = 0, $limit = null, $full_view = true,
$list_type_toggle = true, $pagination = true) {

    if (!is_int($offset)) {
        $offset = (int)get_input('offset', 0);
    }

    // list type can be passed as request parameter
    $list_type = get_input('list_type', 'list');
    if (get_input('listtype')) {
        elgg_deprecated_notice("'listtype' has been deprecated by 'list_type' for lists", 1.8);
        $list_type = get_input('listtype');
    }

    if (is_array($vars)) {
        // new function
        $defaults = array(
            'items' => $entities,
            'list_class' => 'elgg-list-entity',
            'full_view' => true,
            'pagination' => true,
            'list_type' => $list_type,
            'list_type_toggle' => false,
            'offset' => $offset,
            'limit' => null,
        );

        $vars = array_merge($defaults, $vars);

    } else {
        // old function parameters
        elgg_deprecated_notice("Please update your use of elgg_view_entity_list()", 1.8);

        if ($limit === null) {
            $limit = elgg_get_config('default_limit');
        }

        $vars = array(
            'items' => $entities,
            'count' => (int) $vars, // the old count parameter
            'offset' => $offset,
            'limit' => (int) $limit,
            'full_view' => $full_view,
            'pagination' => $pagination,
            'list_type' => $list_type,
            'list_type_toggle' => $list_type_toggle,
            'list_class' => 'elgg-list-entity',
        );
    }

    if (!$vars["limit"] && !$vars["offset"]) {
        // no need for pagination if listing is unlimited
        $vars["pagination"] = false;
    }

    if ($vars['list_type'] != 'list') {
        return elgg_view('page/components/gallery', $vars);
    } else {
        return elgg_view('page/components/list', $vars);
    }
}

function elgg_view_annotation_list($annotations, array $vars = array()) {
    $defaults = array(
        'items' => $annotations,
        'offset' => null,
        'limit' => null,
        'list_class' => 'elgg-list-annotation elgg-annotation-list', // @todo remove elgg-annotation-list in Elgg 1.9
        'full_view' => true,
        'offset_key' => 'annoff',
    );
    
    $vars = array_merge($defaults, $vars);
    
    if (!$vars["limit"] && !$vars["offset"]) {
        // no need for pagination if listing is unlimited
        $vars["pagination"] = false;
    }

    return elgg_view('page/components/list', $vars);
}

function elgg_view_entity_annotations(\ElggEntity $entity, $full_view = true) {
    if (!($entity instanceof \ElggEntity)) {
        return false;
    }

    $entity_type = $entity->getType();

    $annotations = elgg_trigger_plugin_hook('entity:annotate', $entity_type,
        array(
            'entity' => $entity,
            'full_view' => $full_view,
        )
    );

    return $annotations;
}

function elgg_view_title($title, $vars = array()) {
    if (!is_array($vars)) {
        elgg_deprecated_notice('setting $submenu in elgg_view_title() is deprecated', 1.8);
        $vars = array('submenu' => $vars);
    }

    $vars['title'] = $title;

    return elgg_view('page/elements/title', $vars);
}

function elgg_view_friendly_time($time) {
    return elgg_view('output/friendlytime', array('time' => $time));
}


function elgg_view_comments($entity, $add_comment = true, array $vars = array()) {
    if (!($entity instanceof \ElggEntity)) {
        return false;
    }

    $vars['entity'] = $entity;
    $vars['show_add_form'] = $add_comment;
    $vars['class'] = elgg_extract('class', $vars, "{$entity->getSubtype()}-comments");

    $output = elgg_trigger_plugin_hook('comments', $entity->getType(), $vars, false);
    if ($output) {
        return $output;
    } else {
        return elgg_view('page/elements/comments', $vars);
    }
}

function elgg_view_image_block($image, $body, $vars = array()) {
    $vars['image'] = $image;
    $vars['body'] = $body;
    return elgg_view('page/components/image_block', $vars);
}

function elgg_view_module($type, $title, $body, array $vars = array()) {
    $vars['type'] = $type;
    $vars['class'] = elgg_extract('class', $vars, '');
    $vars['title'] = $title;
    $vars['body'] = $body;
    return elgg_view('page/components/module', $vars);
}

function elgg_view_river_item($item, array $vars = array()) {
    if (!($item instanceof \ElggRiverItem)) {
        return '';
    }
    // checking default viewtype since some viewtypes do not have unique views per item (rss)
    $view = $item->getView();
    if (!$view || !elgg_view_exists($view, 'default')) {
        return '';
    }

    $subject = $item->getSubjectEntity();
    $object = $item->getObjectEntity();
    if (!$subject || !$object) {
        // subject is disabled or subject/object deleted
        return '';
    }

    // @todo this needs to be cleaned up
    // Don't hide objects in closed groups that a user can see.
    // see https://github.com/elgg/elgg/issues/4789
    //  else {
    //      // hide based on object's container
    //      $visibility = \Elgg\GroupItemVisibility::factory($object->container_guid);
    //      if ($visibility->shouldHideItems) {
    //          return '';
    //      }
    //  }

    $vars['item'] = $item;

    return elgg_view('river/item', $vars);
}

function elgg_view_form($action, $form_vars = array(), $body_vars = array()) {
    global $CONFIG;

    $defaults = array(
        'action' => $CONFIG->wwwroot . "action/$action",
        'body' => elgg_view("forms/$action", $body_vars)
    );

    $form_class = 'elgg-form-' . preg_replace('/[^a-z0-9]/i', '-', $action);

    // append elgg-form class to any class options set
    if (isset($form_vars['class'])) {
        $form_vars['class'] = $form_vars['class'] . " $form_class";
    } else {
        $form_vars['class'] = $form_class;
    }

    $form_vars = array_merge($defaults, $form_vars);
    $form_vars['action_name'] = $action;

    return elgg_view('input/form', $form_vars);
}

function elgg_view_tagcloud(array $options = array()) {

    $type = $subtype = '';
    if (isset($options['type'])) {
        $type = $options['type'];
    }
    if (isset($options['subtype'])) {
        $subtype = $options['subtype'];
    }

    $tag_data = elgg_get_tags($options);
    return elgg_view("output/tagcloud", array(
        'value' => $tag_data,
        'type' => $type,
        'subtype' => $subtype,
    ));
}

function elgg_view_list_item($item, array $vars = array()) {
    global $CONFIG;

    $type = $item->getType();
    if (in_array($type, $CONFIG->entity_types)) {
        return elgg_view_entity($item, $vars);
    } else if ($type == 'annotation') {
        return elgg_view_annotation($item, $vars);
    } else if ($type == 'river') {
        return elgg_view_river_item($item, $vars);
    }

    return '';
}

function elgg_view_icon($name, $class = '') {
    if ($class === true) {
        elgg_deprecated_notice("Using a boolean to float the icon is deprecated. Use the class float.", 1.9);
        $class = 'float';
    }
    
    $icon_class = array("elgg-icon-$name" , $class);
    
    return elgg_view("output/icon", array("class" => $icon_class));
}

function elgg_view_access_collections($owner_guid) {
    if ($collections = get_user_access_collections($owner_guid)) {
        $user = get_user($owner_guid);
        if ($user) {
            $entities = $user->getFriends(array('limit' => 0));
        } else {
            $entities = array();
        }

        foreach ($collections as $key => $collection) {
            $collections[$key]->members = get_members_of_access_collection($collection->id, true);
            $collections[$key]->entities = $entities;
        }
    }

    return elgg_view('core/friends/collections', array('collections' => $collections));
}

function set_template_handler($function_name) {
    global $CONFIG;

    if (is_callable($function_name)) {
        $CONFIG->template_handler = $function_name;
        return true;
    }
    return false;
}

function autoregister_views($view_base, $folder, $base_location_path, $viewtype) {
    return _elgg_services()->views->autoregisterViews($view_base, $folder, $base_location_path, $viewtype);
}

function _elgg_views_minify($hook, $type, $content, $params) {
    if (preg_match('~[\.-]min\.~', $params['view'])) {
        // bypass minification
        return;
    }

    if ($type == 'js') {
        if (elgg_get_config('simplecache_minify_js')) {
            return JSMin::minify($content);
        }
    } elseif ($type == 'css') {
        if (elgg_get_config('simplecache_minify_css')) {
            $cssmin = new CSSmin();
            return $cssmin->run($content);
        }
    }
}


function _elgg_views_amd($hook, $type, $content, $params) {
    $filter = new \Elgg\Amd\ViewFilter();
    return $filter->filter($params['view'], $content);
}

function elgg_views_add_rss_link() {
    global $autofeed;
    if (isset($autofeed) && $autofeed == true) {
        $url = current_page_url();
        if (substr_count($url, '?')) {
            $url .= "&view=rss";
        } else {
            $url .= "?view=rss";
        }

        $url = elgg_format_url($url);
        elgg_register_menu_item('extras', array(
            'name' => 'rss',
            'text' => elgg_view_icon('rss'),
            'href' => $url,
            'title' => elgg_echo('feed:rss'),
        ));
    }
}

function _elgg_views_send_header_x_frame_options() {
    header('X-Frame-Options: SAMEORIGIN');
}

function _elgg_views_deprecate_removed_views() {
    $removed_views = array(
        "1.10" => array(
            'core/settings/tools',
        ),
    );

    $views_svc = _elgg_services()->views;
    foreach ($removed_views as $version => $names) {
        foreach ($names as $name) {
            if ($views_svc->viewExists($name)) {
                elgg_deprecated_notice("The view $name is no longer used and should not be provided or extended.", $version);
            }
        }
    }
}

function elgg_views_handle_deprecated_views() {
    $location = elgg_get_view_location('page_elements/contentwrapper');
    if ($location === "/var/www/views/") {
        elgg_extend_view('page_elements/contentwrapper', 'page/elements/wrapper');
    }
}

function elgg_views_boot() {
    global $CONFIG;

    elgg_register_simplecache_view('css/ie');

    elgg_register_simplecache_view('js/text.js');

    elgg_register_js('elgg.require_config', elgg_get_simplecache_url('js', 'elgg/require_config'), 'head');
    elgg_register_js('require', '/vendors/requirejs/require-2.1.10.min.js', 'head');
    elgg_register_js('jquery', '/vendors/jquery/jquery-1.11.0.min.js', 'head');
    elgg_register_js('jquery-migrate', '/vendors/jquery/jquery-migrate-1.2.1.min.js', 'head');
    elgg_register_js('jquery-ui', '/vendors/jquery/jquery-ui-1.10.4.min.js', 'head');

    // this is the only lib that isn't required to be loaded sync in head
    elgg_define_js('jquery.form', array(
        'src' => '/vendors/jquery/jquery.form.min.js',
        'deps' => array('jquery'),
        'exports' => 'jQuery.fn.ajaxForm',
    ));

    $elgg_js_url = elgg_get_simplecache_url('js', 'elgg');
    elgg_register_js('elgg', $elgg_js_url, 'head');

    elgg_load_js('elgg.require_config');
    elgg_load_js('require');
    elgg_load_js('jquery');
    elgg_load_js('jquery-migrate');
    elgg_load_js('jquery-ui');
    elgg_load_js('elgg');

    $lightbox_js_url = elgg_get_simplecache_url('js', 'lightbox');
    elgg_register_js('lightbox', $lightbox_js_url);

    elgg_register_css('lightbox', 'vendors/jquery/colorbox/theme/colorbox.css');

    $elgg_css_url = elgg_get_simplecache_url('css', 'elgg');
    elgg_register_css('elgg', $elgg_css_url);

    elgg_load_css('elgg');

    elgg_register_ajax_view('js/languages');

    elgg_register_plugin_hook_handler('simplecache:generate', 'js', '_elgg_views_amd');
    elgg_register_plugin_hook_handler('simplecache:generate', 'css', '_elgg_views_minify');
    elgg_register_plugin_hook_handler('simplecache:generate', 'js', '_elgg_views_minify');

    elgg_register_plugin_hook_handler('output:before', 'layout', 'elgg_views_add_rss_link');
    elgg_register_plugin_hook_handler('output:before', 'page', '_elgg_views_send_header_x_frame_options');

    // discover the core viewtypes
    // @todo the cache is loaded in load_plugins() but we need to know viewtypes earlier
    $view_path = $CONFIG->viewpath;
    $viewtype_dirs = scandir($view_path);
    foreach ($viewtype_dirs as $viewtype) {
        if (_elgg_is_valid_viewtype($viewtype) && is_dir($view_path . $viewtype)) {
            elgg_register_viewtype($viewtype);
        }
    }

    // set default icon sizes - can be overridden in settings.php or with plugin
    if (!isset($CONFIG->icon_sizes)) {
        $icon_sizes = array(
            'topbar' => array('w' => 16, 'h' => 16, 'square' => true, 'upscale' => true),
            'tiny' => array('w' => 25, 'h' => 25, 'square' => true, 'upscale' => true),
            'small' => array('w' => 40, 'h' => 40, 'square' => true, 'upscale' => true),
            'medium' => array('w' => 100, 'h' => 100, 'square' => true, 'upscale' => true),
            'large' => array('w' => 200, 'h' => 200, 'square' => false, 'upscale' => false),
            'master' => array('w' => 550, 'h' => 550, 'square' => false, 'upscale' => false),
        );
        elgg_set_config('icon_sizes', $icon_sizes);
    }
}

elgg_register_event_handler('boot', 'system', 'elgg_views_boot');
elgg_register_event_handler('init', 'system', 'elgg_views_handle_deprecated_views');
elgg_register_event_handler('ready', 'system', '_elgg_views_deprecate_removed_views');