dokuwiki-plugin-childrenpages/action.php

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<?php
/**
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* Children pages plugin: Shows links to children pages in the page menu
*
* @license BSD 2-Clause
* @author Antoine Le Gonidec <vv221.dokuwiki@dotslashplay.it>
*/
// must be run within Dokuwiki
if ( ! defined('DOKU_INC') ) {
die();
}
use dokuwiki\plugin\childrenpages\MenuItem;
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class action_plugin_childrenpages extends DokuWiki_Action_Plugin {
/**
* Registers a callback function for a given event
*
* @param Doku_Event_Handler $controller
*/
public function register(Doku_Event_Handler $controller) : void {
$controller->register_hook('MENU_ITEMS_ASSEMBLY', 'AFTER', $this, 'addMenuItems');
}
/**
* Add new items to the page menu
*
* @param Doku_Event $event
*/
public function addMenuItems(Doku_Event $event) : void {
// Check that this method has been called in the expected context
if ( $event->name !== 'MENU_ITEMS_ASSEMBLY' ) {
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$message = "Children pages plugin error:";
$message .= "addMenuItem method should only be called by \"MENU_ITEMS_ASSEMBLY\" event";
$message .= ", but it has been called by \"$event->name\".";
throw new Exception($message);
}
// Only add content to the page menu
if ( $event->data['view'] !== 'page' ) {
return;
}
// Check if all links should be shown, or if the one to the current page shoud be excluded
$show_all_links = (bool) $this->getConf('show_link_to_current_page');
// If the current page is included in a reserved namespace, add a link back to main page
$children_types = $this->getConf('children_list');
$top_namespace = $this->getTopLevelNamespace();
$is_child_page = in_array($top_namespace, $children_types);
if ( $show_all_links || $is_child_page ) {
$main_label = $this->getLang('btn_main');
$this->addMenuItem($event, '_main', $main_label, $is_child_page);
}
// Add menu items for each child page
foreach ( $children_types as $child_type ) {
if ( $show_all_links || $child_type !== $top_namespace ) {
$child_label = $this->getLang("btn_$child_type");
$this->addMenuItem($event, $child_type, $child_label, $is_child_page);
}
}
}
/**
* Add a new item to the page menu
*
* @param Doku_Event $event
* @param string $type
* @param string $name
* @param bool $strip_namespace
*/
protected function addMenuItem(
Doku_Event $event,
string $type,
string $name = '',
bool $strip_namespace = false
) {
$event->data['items'][] = new MenuItem($type, $name, $strip_namespace);
}
/**
* Get the top level namespace for the current page
* Exclude namespace added by the "translate" plugin
*/
protected function getTopLevelNamespace() : ?string {
global $INFO;
global $plugin_controller;
$language = null;
// If one of the "translate" or "translation" plugins is activated, get the language code for the current page
if ( ! $plugin_controller->isdisabled('translate') ) {
$translate_plugin =& $plugin_controller->load('helper', 'translate');
$language = $translate_plugin->getPageLanguage();
} elseif ( ! $plugin_controller->isdisabled('translation') ) {
$translation_plugin =& $plugin_controller->load('helper', 'translation');
$language = $translation_plugin->getLangPart($INFO['id']);
}
// Skip top-level language namespace if one is in use
if ( $language !== null && preg_match("/^$language:/", $INFO['id']) ) {
return explode(':', $INFO['namespace'])[1];
} else {
return explode(':', $INFO['namespace'])[0];
}
}
}