<?php
/**
 * @package WP Content Aware Engine
 * @author Joachim Jensen <joachim@dev.institute>
 * @license GPLv3
 * @copyright 2020 by Joachim Jensen
 */

defined('ABSPATH') || exit;

/**
 *
 * Polylang Module
 * Requires version 1.7+
 *
 * Detects if current content is:
 * a) in specific language
 *
 */
class WPCAModule_polylang extends WPCAModule_Base
{

    /**
     * @var string
     */
    protected $category = 'plugins';

    /**
     * Constructor
     */
    public function __construct()
    {
        parent::__construct('language', __('Languages', WPCA_DOMAIN));

        $this->query_name = 'cl';
    }

    public function initiate()
    {
        parent::initiate();
        add_filter(
            'pll_get_post_types',
            array($this,'remove_sidebar_multilingual')
        );
    }

    /**
     * @return bool
     */
    public function can_enable()
    {
        return defined('POLYLANG_VERSION')
            && function_exists('pll_current_language');
    }

    /**
     * @since  1.0
     * @return boolean
     */
    public function in_context()
    {
        return true;
    }

    /**
     * Get data from context
     *
     * @since  1.0
     * @return array
     */
    public function get_context_data()
    {
        $data = array($this->id);
        $data[] = pll_current_language();
        return $data;
    }

    /**
     * Get languages
     *
     * @global object $polylang
     * @since  1.0
     * @param  array  $args
     * @return array
     */
    protected function _get_content($args = array())
    {
        global $polylang;

        $langs = array();

        if (isset($polylang->model) && method_exists($polylang->model, 'get_languages_list')) {
            foreach ($polylang->model->get_languages_list(array('fields' => false)) as $lng) {
                $langs[$lng->slug] = $lng->name;
            }
        }

        if ($args['include']) {
            $langs = array_intersect_key($langs, array_flip($args['include']));
        }
        return $langs;
    }

    /**
     * Remove sidebars from multilingual list
     *
     * @since  1.0
     * @param  array $post_types
     * @return array
     */
    public function remove_sidebar_multilingual($post_types)
    {
        foreach (WPCACore::types() as $post_type => $module) {
            unset($post_types[$post_type]);
        }
        return $post_types;
    }
}