<?php

/**
 * Sets a custom slug when creating auto-draft template parts.
 *
 * This is only needed for auto-drafts created by the regular WP editor.
 * If this page is to be removed, this will not be necessary.
 *
 * @since 5.9.0
 *
 * @param int $post_id Post ID.
 */
function wp_set_unique_slug_on_create_template_part( $post_id ) {
    $post = get_post( $post_id );
    if ( 'auto-draft' !== $post->post_status ) {
        return;
    }

    if ( ! $post->post_name ) {
        wp_update_post(
            array(
                'ID'        => $post_id,
                'post_name' => 'custom_slug_' . uniqid(),
            )
        );
    }

    $terms = get_the_terms( $post_id, 'wp_theme' );
    if ( ! is_array( $terms ) || ! count( $terms ) ) {
        wp_set_post_terms( $post_id, get_stylesheet(), 'wp_theme' );
    }
}

/**
 * Generates a unique slug for templates.
 *
 * @access private
 * @since 5.8.0
 *
 * @param string $override_slug The filtered value of the slug (starts as `null` from apply_filter).
 * @param string $slug          The original/un-filtered slug (post_name).
 * @param int    $post_id       Post ID.
 * @param string $post_status   No uniqueness checks are made if the post is still draft or pending.
 * @param string $post_type     Post type.
 * @return string The original, desired slug.
 */
function wp_filter_wp_template_unique_post_slug( $override_slug, $slug, $post_id, $post_status, $post_type ) {
    if ( 'wp_template' !== $post_type && 'wp_template_part' !== $post_type ) {
        return $override_slug;
    }

    if ( ! $override_slug ) {
        $override_slug = $slug;
    }

    /*
     * Template slugs must be unique within the same theme.
     * TODO - Figure out how to update this to work for a multi-theme environment.
     * Unfortunately using `get_the_terms()` for the 'wp-theme' term does not work
     * in the case of new entities since is too early in the process to have been saved
     * to the entity. So for now we use the currently activated theme for creation.
     */
    $theme = get_stylesheet();
    $terms = get_the_terms( $post_id, 'wp_theme' );
    if ( $terms && ! is_wp_error( $terms ) ) {
        $theme = $terms[0]->name;
    }

    $check_query_args = array(
        'post_name__in'  => array( $override_slug ),
        'post_type'      => $post_type,
        'posts_per_page' => 1,
        'no_found_rows'  => true,
        'post__not_in'   => array( $post_id ),
        'tax_query'      => array(
            array(
                'taxonomy' => 'wp_theme',
                'field'    => 'name',
                'terms'    => $theme,
            ),
        ),
    );
    $check_query      = new WP_Query( $check_query_args );
    $posts            = $check_query->posts;

    if ( count( $posts ) > 0 ) {
        $suffix = 2;
        do {
            $query_args                  = $check_query_args;
            $alt_post_name               = _truncate_post_slug( $override_slug, 200 - ( strlen( $suffix ) + 1 ) ) . "-$suffix";
            $query_args['post_name__in'] = array( $alt_post_name );
            $query                       = new WP_Query( $query_args );
            ++$suffix;
        } while ( count( $query->posts ) > 0 );
        $override_slug = $alt_post_name;
    }

    return $override_slug;
}

/**
 * Enqueues the skip-link styles.
 *
 * @access private
 * @since 6.4.0
 * @since 7.0.0 A script is no longer printed in favor of being added via {@see _block_template_add_skip_link()}.
 *
 * @global string $_wp_current_template_content
 */
function wp_enqueue_block_template_skip_link() {
    global $_wp_current_template_content;

    // Back-compat for plugins that disable functionality by unhooking this action.
    if ( ! has_action( 'wp_footer', 'the_block_template_skip_link' ) ) {
        return;
    }
    remove_action( 'wp_footer', 'the_block_template_skip_link' );

    // Early exit if not a block theme.
    if ( ! current_theme_supports( 'block-templates' ) ) {
        return;
    }

    // Early exit if not a block template.
    if ( ! $_wp_current_template_content ) {
        return;
    }

    wp_enqueue_style( 'wp-block-template-skip-link' );
}

/**
 * Enables the block templates (editor mode) for themes with theme.json by default.
 *
 * @access private
 * @since 5.8.0
 */
function wp_enable_block_templates() {
    if ( wp_is_block_theme() || wp_theme_has_theme_json() ) {
        add_theme_support( 'block-templates' );
    }
}