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<?php
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/**
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* @file
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* Allows modules to contribute styles.
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*/
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// -----------------------------------------------------------------------
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// REQUEST FUNCTIONS
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/**
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* Fetch an advanced forum style plugin
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*
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* @param $style
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* Name of the style plugin
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*
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* @return
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* An array with information about the requested style plugin.
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*/
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function advanced_forum_get_style($style) {
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return advanced_forum_get_plugins('styles', 'advanced_forum_styles', $style);
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}
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/**
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* Collate information about all available advanced_forum styles.
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*
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* @return
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* An array with information about the requested forum style.
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*/
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function advanced_forum_get_styles() {
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return advanced_forum_get_plugins('styles', 'advanced_forum_styles');
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}
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// -----------------------------------------------------------------------
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// MASTER HANDLER
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/**
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* Fetch a group of plugins by name.
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*
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* @param $plugin
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* This is the name of the plugin, and also the name of the directory.
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* @param $hook
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* This is the hook to call to get the info for the plugin.
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*
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* @return
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* An array of information arrays about the plugins received.
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*/
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function advanced_forum_get_plugins($plugin, $hook, $id = NULL) {
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static $plugins = array();
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static $all_hooks = array();
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// Always load all hooks if we need them.
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if (!isset($all_hooks[$plugin])) {
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$all_hooks[$plugin] = TRUE;
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$plugins[$plugin] = advanced_forum_load_hooks($hook);
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}
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// If a specific plugin $id is being requested, return it.
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if ($id && array_key_exists($id, $plugins[$plugin])) {
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return $plugins[$plugin][$id];
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}
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// If no $id was requested, return the lot.
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if (!$id) {
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return $plugins[$plugin];
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}
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}
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// -----------------------------------------------------------------------
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// WORKER/RETRIEVER FUNCTIONS
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/**
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* Load plugin info for all hooks; this is handled separately from plugins
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* from files.
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*
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* @param $hook
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* The hook being invoked.
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*
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* @return
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* An array of info supplied by any hook implementations.
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*/
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function advanced_forum_load_hooks($hook) {
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$info = array();
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foreach (module_implements($hook) as $module) {
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$result = _advanced_forum_process_plugin($module, $module, drupal_get_path('module', $module), $hook);
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if (is_array($result)) {
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$info = array_merge($info, $result);
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}
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}
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return $info;
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}
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/**
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* Process a single hook implementation of a advanced_forum plugin.
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*
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* @param $module
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* The module that owns the hook.
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* @param $identifier
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* Either the module or 'advanced_forum_' . $file->name
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* @param $hook
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* The name of the hook being invoked.
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*/
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function _advanced_forum_process_plugin($module, $identifier, $path, $hook) {
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$function = $identifier . '_' . $hook;
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if (!function_exists($function)) {
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return NULL;
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}
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$result = $function();
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if (!isset($result) || !is_array($result)) {
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return NULL;
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}
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// Fill in defaults.
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foreach ($result as $name => $plugin) {
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if (!is_dir($path . '/' . $plugin['directory'])) {
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unset($result[$name]);
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continue;
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}
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$result[$name] += array(
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'module' => $module,
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'name' => $name,
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'path' => $path . '/' . $plugin['directory'],
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);
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}
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return !empty($result) ? $result : NULL;
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}
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