[SmartCrawl] Add support seo meta for Extra Theme layout

smartcrawl-add-support-seo-meta-for-extra-theme-layout.php

<?php
/**
 * Plugin Name: [SmartCrawl] Add support seo meta for Extra Theme layout
 * Description: [SmartCrawl] Add support seo meta for Extra Theme layout. And to avoid conflict with SmartCrawl, this MU also disable meta render function from Extra Theme (elegant_description, elegant_keywords, elegant_canonical, elegant_titles_filter) and remove SEO tab from Extra Theme options - 1124086828417629
 * Author: Thobk @ WPMUDEV
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 */
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

add_action( 'plugins_loaded', 'wpmudev_smartcarwl_disable_elegant_render_meta_func', 100 );

function wpmudev_smartcarwl_disable_elegant_render_meta_func(){
	if( ! function_exists('elegant_description') ){
		function elegant_description(){}
	}

	if( ! function_exists('elegant_keywords') ){
		function elegant_keywords(){}
	}

	if( ! function_exists('elegant_canonical') ){
		function elegant_canonical(){}
	}
}

add_action( 'after_setup_theme', 'wpmudev_sc_add_support_seo_meta_for_extra_theme_layout_func', 100 );

function wpmudev_sc_add_support_seo_meta_for_extra_theme_layout_func() {
	function wpmudev_smartcrawl_is_set_home_on_extra_theme_layout(){
		return (boolean) ( 'layout' == get_option( 'show_on_front' ) && extra_get_home_layout_id() );
	}

	if ( defined( 'SMARTCRAWL_VERSION' ) && SMARTCRAWL_VERSION
		&& function_exists('extra_get_home_layout_id') && wpmudev_smartcrawl_is_set_home_on_extra_theme_layout()
		&& class_exists( 'Smartcrawl_Loader' )
	) {
		class WPMUDEV_MC_Extra_Theme{
			private $post_type;
			private $home_page_id;

			public function __construct(){
				global $shortname;
				// init
				$this->post_type = $this->get_layout_post_type();
				$this->home_page_id = extra_get_home_layout_id();

				// remove extra theme filter
				remove_filter( 'pre_get_document_title', 'elegant_titles_filter' );
				// remove seo tab from theme option
				add_filter( 'et_epanel_tab_names', array( $this, 'disable_seo_tab_from_extra_theme_option' ) );

				if ( user_can_see_seo_metabox() ) {
					add_action( 'admin_menu', array( $this, 'add_seo_meta_for_extra_theme_layout' ) );
					add_action( "save_post_{$this->post_type}", array( $this, 'save_seo_meta' ), 0 );
				}


				add_action( 'wp_head', array( $this, 'fix_seo_meta_for_extra_theme_layout' ), 0 );
				add_filter( 'post_type_link', array( $this, 'retrive_extra_theme_home_page_link'), 10, 2);
			}

			public function disable_extra_meta_render(){
				return 'off';
			}


			public function disable_seo_tab_from_extra_theme_option( $tabs ){
				if( isset( $tabs['seo'] ) ){
					unset( $tabs['seo'] );
				}

				return $tabs;
			}

			public function get_layout_post_type(){
				return defined('EXTRA_LAYOUT_POST_TYPE') ? EXTRA_LAYOUT_POST_TYPE : 'layout';
			}


			public function add_seo_meta_for_extra_theme_layout(){
				add_meta_box( 'wds-wds-meta-box', __( 'SmartCrawl', 'wds' ), array( $this, 'seo_meta_boxes' ), $this->post_type, 'normal', 'high' );
				add_action( 'admin_print_scripts', array( $this, 'load_meta_boxes_assets' ) );

				if( isset( $_GET['page'] ) && Smartcrawl_Settings::TAB_ONPAGE ){
					add_filter( 'pre_option_page_on_front', 'extra_get_home_layout_id' );
				}
			}

			public function seo_meta_boxes($post ) {
				return Smartcrawl_Simple_Renderer::render( 'metabox/metabox-main', array(
					'post' => $post,
				) );
			}

			public function load_meta_boxes_assets(){
				wp_enqueue_script( Smartcrawl_Controller_Assets::METABOX_JS );

				wp_enqueue_media();

				wp_enqueue_style( Smartcrawl_Controller_Assets::APP_CSS );
			}

			public function save_seo_meta(){
				if( $request_data = isset( $_POST['_wds_nonce'] ) && wp_verify_nonce( $_POST['_wds_nonce'], 'wds-metabox-nonce' ) ? stripslashes_deep( $_POST ) : array() ){
					$_POST['post_type'] = 'post'; // this trick will help we can use smartcrawl_save_postdata func
					return Smartcrawl_Metabox::get()->smartcrawl_save_postdata( $request_data['post_ID'] );
				}	
			}

			public function fix_seo_meta_for_extra_theme_layout(){

				if( is_home() && 'posts' !== get_option( 'show_on_front' ) ){
					add_filter( 'pre_option_page_for_posts', 'extra_get_home_layout_id' );

					// change canonical link
					add_filter( 'wds_filter_canonical', array( $this, 'get_home_url' ) );
				}
			}

			public function get_home_url(){
				return home_url('/');
			}


			public function retrive_extra_theme_home_page_link( $link, $post ){
				if( $post->ID === $this->home_page_id ){
					$link = home_url( '/' );
				}
				return $link;
			}


		}

		$run = new WPMUDEV_MC_Extra_Theme;
	}
}