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Diffstat (limited to 'mod/likes/start.php')
| -rw-r--r-- | mod/likes/start.php | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/mod/likes/start.php b/mod/likes/start.php new file mode 100644 index 000000000..0f8e12159 --- /dev/null +++ b/mod/likes/start.php @@ -0,0 +1,171 @@ +<?php +/** + * Likes plugin + * + */ + +elgg_register_event_handler('init', 'system', 'likes_init'); + +function likes_init() { + + elgg_extend_view('css/elgg', 'likes/css'); + elgg_extend_view('js/elgg', 'likes/js'); + + // registered with priority < 500 so other plugins can remove likes + elgg_register_plugin_hook_handler('register', 'menu:river', 'likes_river_menu_setup', 400); + elgg_register_plugin_hook_handler('register', 'menu:entity', 'likes_entity_menu_setup', 400); + + $actions_base = elgg_get_plugins_path() . 'likes/actions/likes'; + elgg_register_action('likes/add', "$actions_base/add.php"); + elgg_register_action('likes/delete', "$actions_base/delete.php"); +} + +/** + * Add likes to entity menu at end of the menu + */ +function likes_entity_menu_setup($hook, $type, $return, $params) { + if (elgg_in_context('widgets')) { + return $return; + } + + $entity = $params['entity']; + + // likes button + $options = array( + 'name' => 'likes', + 'text' => elgg_view('likes/button', array('entity' => $entity)), + 'href' => false, + 'priority' => 1000, + ); + $return[] = ElggMenuItem::factory($options); + + // likes count + $count = elgg_view('likes/count', array('entity' => $entity)); + if ($count) { + $options = array( + 'name' => 'likes_count', + 'text' => $count, + 'href' => false, + 'priority' => 1001, + ); + $return[] = ElggMenuItem::factory($options); + } + + return $return; +} + +/** + * Add a like button to river actions + */ +function likes_river_menu_setup($hook, $type, $return, $params) { + if (elgg_is_logged_in()) { + $item = $params['item']; + + // only like group creation #3958 + if ($item->type == "group" && $item->view != "river/group/create") { + return $return; + } + + // don't like users #4116 + if ($item->type == "user") { + return $return; + } + + $object = $item->getObjectEntity(); + if (!elgg_in_context('widgets') && $item->annotation_id == 0) { + if ($object->canAnnotate(0, 'likes')) { + // like button + $options = array( + 'name' => 'likes', + 'href' => false, + 'text' => elgg_view('likes/button', array('entity' => $object)), + 'is_action' => true, + 'priority' => 100, + ); + $return[] = ElggMenuItem::factory($options); + + // likes count + $count = elgg_view('likes/count', array('entity' => $object)); + if ($count) { + $options = array( + 'name' => 'likes_count', + 'text' => $count, + 'href' => false, + 'priority' => 101, + ); + $return[] = ElggMenuItem::factory($options); + } + } + } + } + + return $return; +} + +/** + * Count how many people have liked an entity. + * + * @param ElggEntity $entity + * + * @return int Number of likes + */ +function likes_count($entity) { + $type = $entity->getType(); + $params = array('entity' => $entity); + $number = elgg_trigger_plugin_hook('likes:count', $type, $params, false); + + if ($number) { + return $number; + } else { + return $entity->countAnnotations('likes'); + } +} + +/** + * Notify $user that $liker liked his $entity. + * + * @param type $user + * @param type $liker + * @param type $entity + */ +function likes_notify_user(ElggUser $user, ElggUser $liker, ElggEntity $entity) { + + if (!$user instanceof ElggUser) { + return false; + } + + if (!$liker instanceof ElggUser) { + return false; + } + + if (!$entity instanceof ElggEntity) { + return false; + } + + $title_str = $entity->title; + if (!$title_str) { + $title_str = elgg_get_excerpt($entity->description); + } + + $site = get_config('site'); + + $subject = elgg_echo('likes:notifications:subject', array( + $liker->name, + $title_str + )); + + $body = elgg_echo('likes:notifications:body', array( + $user->name, + $liker->name, + $title_str, + $site->name, + $entity->getURL(), + $liker->getURL() + )); + + notify_user($user->guid, + $liker->guid, + $subject, + $body + ); +}
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