25. Translation Workflow Automation

/**
 * Automatically create empty translation stubs when a post is published.
 * Useful when you want translators to always have a draft ready.
 */
add_action('transition_post_status', function ($new_status, $old_status, $post) {
    if ($new_status !== 'publish' || $old_status === 'publish') return;

    $translatable = get_option('lf_translatable_post_types', []);
    if (!in_array($post->post_type, $translatable)) return;

    $post_lang = lf_get_post_language($post->ID);
    $languages = lf_get_languages();
    $existing = lf_get_post_translations($post->ID);

    foreach ($languages as $code => $lang) {
        if ($code === $post_lang) continue;
        if (isset($existing[$code])) continue;

        // Create a draft stub
        $stub_id = wp_insert_post([
            'post_type'   => $post->post_type,
            'post_title'  => $post->post_title . ' [' . strtoupper($code) . ']',
            'post_status' => 'draft',
            'post_author' => $post->post_author,
        ]);

        if ($stub_id && !is_wp_error($stub_id)) {
            LF_Post_Translation::instance()->set_post_language($stub_id, $code);
            LF_Post_Translation::instance()->link_translations($post->ID, $stub_id);
        }
    }
}, 10, 3);

/**
 * Set a translation deadline meta when a translation is created,
 * and send reminders for overdue translations.
 */
add_action('lf_translation_created', function ($original_id, $new_id, $lang) {
    // Set a 7-day deadline
    $deadline = date('Y-m-d H:i:s', strtotime('+7 days'));
    update_post_meta($new_id, '_lf_translation_deadline', $deadline);
    update_post_meta($new_id, '_lf_translation_status', 'pending');
}, 10, 3);

// Scheduled event to check for overdue translations
add_action('lf_check_overdue_translations', function () {
    $overdue = new WP_Query([
        'post_type'   => 'any',
        'post_status' => 'draft',
        'meta_query'  => [
            'relation' => 'AND',
            [
                'key'     => '_lf_translation_deadline',
                'value'   => current_time('mysql'),
                'compare' => '<',
                'type'    => 'DATETIME',
            ],
            [
                'key'   => '_lf_translation_status',
                'value' => 'pending',
            ],
        ],
    ]);

    foreach ($overdue->posts as $post) {
        $deadline = get_post_meta($post->ID, '_lf_translation_deadline', true);
        $lang = lf_get_post_language($post->ID);
        // Send reminder email or Slack notification
        do_action('lf_translation_overdue', $post->ID, $lang, $deadline);
    }
});

// Schedule the check if not already scheduled
if (!wp_next_scheduled('lf_check_overdue_translations')) {
    wp_schedule_event(time(), 'daily', 'lf_check_overdue_translations');
}