Polylang Bulk Action

polylang-bulk-action_duplicate-post.php

<?php

global $wpdb;

/**
 * and all the original post data then
 */
$post = get_post($post_id);

/**
 * if you don't want current user to be the new post author,
 * then change next couple of lines to this: $new_post_author = $post->post_author;
 */
$current_user = wp_get_current_user();
$new_post_author = $current_user->ID;

/**
 * if post data exists, create the post duplicate
 */
if (isset($post) && $post != null) {

    /**
     * new post data array
     */
    $args = array(
        'comment_status' => $post->comment_status,
        'ping_status' => $post->ping_status,
        'post_author' => $new_post_author,
        'post_content' => $post->post_content,
        'post_excerpt' => $post->post_excerpt,
        'post_name' => $post->post_name,
        'post_parent' => $post->post_parent,
        'post_password' => $post->post_password,
        'post_status' => 'draft',
        'post_title' => $post->post_title,
        'post_type' => $post->post_type,
        'to_ping' => $post->to_ping,
        'menu_order' => $post->menu_order,
        'action' => 'translate_media',
    );

    /**
     * insert the post by wp_insert_post() function
     */
    $new_post_id = wp_insert_post($args);

    /**
     * get all current post terms ad set them to the new post draft
     */
    $taxonomies = get_object_taxonomies(
        $post->post_type
    ); // returns array of taxonomy names for post type, ex array("category", "post_tag");
    foreach ($taxonomies as $taxonomy) {
        $post_terms = wp_get_object_terms($post_id, $taxonomy, array('fields' => 'slugs'));
        wp_set_object_terms($new_post_id, $post_terms, $taxonomy, false);
    }

    /**
     * duplicate all post meta just in two SQL queries
     */
    $post_meta_infos = $wpdb->get_results("SELECT meta_key, meta_value FROM $wpdb->postmeta WHERE post_id=$post_id");
    if (count($post_meta_infos) != 0) {
        $sql_query = "INSERT INTO $wpdb->postmeta (post_id, meta_key, meta_value) ";
        foreach ($post_meta_infos as $meta_info) {
            $meta_key = $meta_info->meta_key;
            if ($meta_key == '_wp_old_slug') {
                continue;
            }
            $meta_value = addslashes($meta_info->meta_value);
            $sql_query_sel[] = "SELECT $new_post_id, '$meta_key', '$meta_value'";
        }
        $sql_query .= implode(" UNION ALL ", $sql_query_sel);
        $wpdb->query($sql_query);
    }

    $languages = pll_languages_list();
    $polylang = PLL();

    $currentLanguage = $polylang->model->post->get_language($post_id); // Stores the old  language
    $translations = $polylang->model->post->get_translations($post_id);
    foreach ($languages as $language) {
        if ($language != $currentLanguage->slug) {
            echo "nice";
            $translations[$language] = $new_post_id;
            pll_set_post_language($new_post_id, $language); // set new language
            pll_save_post_translations($translations);
        }
    }

}

polylang-bulk-action_polylang-bulk-action.php

<?php
/**
 * @package Polylang_Bulk_Action
 * @version 1.0
 */
/*
Plugin Name: Polylang Bulk Action
Plugin URI: ...
Description: ...
Author: Sean Cooper
Version: 1.0
Author URI: http://orderandchaoscreative.com
*/

add_filter('bulk_actions-edit-post', 'register_my_create_language_posts');

function register_my_create_language_posts($bulk_actions)
{
    $bulk_actions['create_language_posts'] = __('Create Language Posts', 'create_language_posts');
    return $bulk_actions;
}

add_filter('handle_bulk_actions-edit-post', 'create_language_posts_handler', 10, 3);

function create_language_posts_handler($redirect_to, $doaction, $post_ids)
{
    if ($doaction !== 'create_language_posts') {
        return $redirect_to;
    }
    foreach ($post_ids as $post_id) {
        // Perform action for each post.
        include "duplicate-post.php";
    }
    $redirect_to = add_query_arg('bulk_language_posts', count($post_ids), $redirect_to);
    return $redirect_to;
}

add_action( 'admin_notices', 'my_bulk_action_admin_notice' );

function my_bulk_action_admin_notice() {
    if ( ! empty( $_REQUEST['bulk_language_posts'] ) ) {
        $count = intval( $_REQUEST['bulk_language_posts'] );
        printf( '<div id="message" class="updated fade">' .
            _n( 'Created %s language post.',
                'Created %s language posts.',
                $count,
                'create_language_posts'
            ) . '</div>', $count );
    }
}

polylang-bulk-action_readme.txt

=== Polylang Bulk Action ===
Contributors: Sean Cooper
Requires at least: 3.0
Stable tag: 1.6
Tested up to: 4.6

Adds an item to bulk action that creates all language pages for Polylang.

== Description ==

Adds an item to bulk action that creates all language pages for Polylang.