<?php

namespace dokuwiki\plugin\childrenpages;

use dokuwiki\Menu\Item\AbstractItem;

class MenuItem extends AbstractItem {
	/**
	 * Generate a menu item from a passed string
	 *
	 * @param string $type
	 * @param string $label
	 * @param bool   $strip_namespace
	 */
	public function __construct(
		string $type,
		string $label           = '',
		bool   $strip_namespace = false
	) {
		$this->type = "childrenpages_$type";
		if ( empty($label) ) {
			$label = ucfirst($type);
		}
		$this->label = $label;
		parent::__construct();
		$this->setTargetFromType($type, $strip_namespace);
	}

	/**
	 * Set the item target link from its type
	 *
	 * @param string $type
	 * @param bool   $strip_namespace
	 */
	protected function setTargetFromType(string $type, bool $strip_namespace) : void {
		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']);
		}
		// Split path to page
		$page_path = explode(':', $INFO['id']);
		// If the top level namespace is a language one, the children namespace should be inserted inside it
		$is_in_a_lang_namespace = ( $language !== null && $page_path[0] === $language );
		if ( $is_in_a_lang_namespace ) {
			array_shift($page_path);
		}
		// Strip the top level namespace if we are already on a child page
		if ( $strip_namespace ) {
			array_shift($page_path);
		}
		// Build the link target path
		$target_path = [];
		if ( $is_in_a_lang_namespace ) {
			$target_path[] = $language;
		}
		// Add namespace of the target child page, unless the special value "_main" has been used
		// "_main" is used to generate a link back to the main parent page
		if ( $type !== '_main' ) {
			$target_path[] = $type;
		}
		$this->id = implode(':', array_merge($target_path, $page_path));
		$this->params = [];
	}
}