<?php
/**
 * Blocks Initializer - For supporting backward compatibility with WordPress / Gutenberg / Stackable v1.
 *
 * @since 	1.15.5
 * @package Stackable
 */

// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! function_exists( 'stackable_get_wp_version' ) ) {

	/**
	 * Gets the current WordPress version, but just the numerical value. Strips
	 * out the dash version descriptors.
	 *
	 * @param string $version The version number, if supplied this is used
	 * instead of the detected one. Used for testing.
	 *
	 * @return string The version number.
	 */
	function stackable_get_wp_version( $version = '' ) {
		$version = $version ? $version : get_bloginfo( 'version' );
		// Remove the non numeric version such as "-RC1".
		$version = preg_replace( '/-.*$/', '', $version );
		return $version;
	}
}

if ( ! function_exists( 'stackable_gutenberg_blockeditor_5_1_backward_compatibility' ) ) {

	/**
	 * In Gutenberg 5.9, a lot of Components in @wordpress/editor moved to @wordpress/block-editor.
	 * Stackable scripts have migrated to '@wordpress/block-editor' (wp.blockEditor), but this was only introduced
	 * in WordPress 5.2.
	 *
	 * This function brings support for WordPress 5.1, where wp.blockEditor was not yet available.
	 */
	function stackable_gutenberg_blockeditor_5_1_backward_compatibility() {
		$custom_js = "if ( typeof wp.blockEditor === 'undefined' ) { wp.blockEditor = wp.editor }";
		wp_add_inline_script( 'ugb-block-js-vendor', $custom_js );
	}
	add_action( 'enqueue_block_assets', 'stackable_gutenberg_blockeditor_5_1_backward_compatibility', 8 );
}

/********************************************************************************************
 * Version 1 frontend styles backward compatibility.
 ********************************************************************************************/

if ( ! function_exists( 'stackable_block_editor_assets_deprecated' ) ) {

	/**
	 * Enqueue block assets for both frontend + backend.
	 *
	 * @since 2.0
	 */
	function stackable_block_editor_assets_deprecated() {
		$enqueue_styles_in_frontend = apply_filters( 'stackable_enqueue_styles', ! is_admin() );

		if ( stackable_should_load_v1_styles() && $enqueue_styles_in_frontend ) {
			wp_enqueue_style(
				'ugb-style-css-deprecated',
				plugins_url( 'dist/frontend_blocks_deprecated.css', STACKABLE_FILE ),
				array( 'ugb-style-css' ),
				STACKABLE_VERSION
			);
		}
	}
	add_action( 'enqueue_block_assets', 'stackable_block_editor_assets_deprecated' );
}

if ( ! function_exists( 'stackable_auto_on_deprecated_styles' ) ) {

	/**
	 * When upgrading from v1 to v2, turn on the loading of deprecated styles.
	 *
	 * @since 2.0
	 */
	function stackable_auto_on_deprecated_styles( $old_version, $new_version ) {
		if ( $old_version === '1' && get_option( 'stackable_load_v1_styles' ) === false ) {
			update_option( 'stackable_load_v1_styles', '1' );
		}
	}
	add_action( 'stackable_version_upgraded', 'stackable_auto_on_deprecated_styles', 10, 2 );
}

if ( ! function_exists( 'stackable_register_load_v1_styles_option' ) ) {

	/**
	 * Ajax handler for saving the setting for loading V1 styles for backward compatibility.
	 *
	 * @since 2.0
	 */
	function stackable_register_load_v1_styles_option() {
		register_setting(
			'stackable_load_v1_styles',
			'stackable_load_v1_styles',
			array(
				'type' => 'string',
				'description' => __( 'Load version 1 styles for backward compatibility', 'block-options' ),
				'sanitize_callback' => 'sanitize_text_field',
				'show_in_rest' => true,
				'default' => '',
			)
		);
	}
	add_action( 'init', 'stackable_register_load_v1_styles_option' );
}

if ( ! function_exists( 'stackable_should_load_v1_styles' ) ) {

	/**
	 * Should we load v1 styles
	 *
	 * @return Boolean
	 *
	 * @since 2.0
	 */
	function stackable_should_load_v1_styles() {
		return get_option( 'stackable_load_v1_styles' ) === '1';
	}
}

/********************************************************************************************
 * END Version 1 frontend styles backward compatibility.
 ********************************************************************************************/

/********************************************************************************************
 * Version 1 & TwentyTwenty frontend styles backward compatibility.
 ********************************************************************************************/

if ( ! function_exists( 'stackable_twentytwenty_body_class' ) ) {
	/**
	 * Adds a twentytwenty class name to the body if the twentytwenty is used.
	 */
	function stackable_twentytwenty_body_class( $classes ) {
		$classes[] = 'ugb--twentytwentytwenty-compat';
		return $classes;
	}

	function stackable_twentytwenty_compat() {
		if ( function_exists( 'twentytwenty_theme_support' ) && stackable_should_load_v1_styles() ) {
			add_filter( 'body_class','stackable_twentytwenty_body_class' );
		}
	}
	add_action( 'wp', 'stackable_twentytwenty_compat' );
}

/********************************************************************************************
 * END Version 1 & TwentyTwenty frontend styles backward compatibility.
 ********************************************************************************************/

if ( ! function_exists( 'stackable_enqueue_wp_5_3_compatibility' ) ) {

	/**
	 * Enqueues the editor styles for WordPress <= 5.3
	 *
	 * @since 2.3.2
	 */
	function stackable_enqueue_wp_5_3_compatibility() {
		wp_enqueue_style(
			'ugb-block-editor-css-wp-5-3',
			plugins_url( 'dist/editor_blocks_wp_v5_3.css', STACKABLE_FILE ),
			array( 'ugb-block-editor-css' ),
			STACKABLE_VERSION
		);
	}

	if ( version_compare( stackable_get_wp_version(), '5.4', '<' ) ) {
		add_action( 'enqueue_block_editor_assets', 'stackable_enqueue_wp_5_3_compatibility', 19 );
	}
}