<?php
defined( 'ABSPATH' ) or die( 'Cheatin&#8217; uh?' );

global $wp_version;

if ( version_compare( $wp_version, '4.4' ) >= 0 && get_rocket_option( 'embeds', 0 ) ) :
	/**
	 * Disable embeds on init.
	 *
	 * - Removes the needed query vars.
	 * - Disables oEmbed discovery.
	 * - Completely removes the related JavaScript.
	 *
	 * @since 2.10
	 * @author Remy Perona
	 */
	function rocket_disable_embeds_init() {
		/* @var WP $wp */
		global $wp;

		// Remove the embed query var.
		$wp->public_query_vars = array_diff( $wp->public_query_vars, array(
			'embed',
		) );

		// Remove the REST API endpoint.
		remove_action( 'rest_api_init', 'wp_oembed_register_route' );

		// Turn off oEmbed auto discovery.
		add_filter( 'embed_oembed_discover', '__return_false' );

		// Don't filter oEmbed results.
		remove_filter( 'oembed_dataparse', 'wp_filter_oembed_result', 10 );

		// Remove oEmbed discovery links.
		remove_action( 'wp_head', 'wp_oembed_add_discovery_links' );

		// Remove oEmbed-specific JavaScript from the front-end and back-end.
		remove_action( 'wp_head', 'wp_oembed_add_host_js' );
		add_filter( 'tiny_mce_plugins', 'rocket_disable_embeds_tiny_mce_plugin' );

		// Remove all embeds rewrite rules.
		add_filter( 'rewrite_rules_array', 'rocket_disable_embeds_rewrites' );

		// Remove filter of the oEmbed result before any HTTP requests are made.
		remove_filter( 'pre_oembed_result', 'wp_filter_pre_oembed_result', 10 );
	}
	add_action( 'init', 'rocket_disable_embeds_init', 9999 );

	/**
	 * Removes the 'wpembed' TinyMCE plugin.
	 *
	 * @since 2.10
	 * @author Remy Perona
	 *
	 * @param array $plugins List of TinyMCE plugins.
	 * @return array The modified list.
	 */
	function rocket_disable_embeds_tiny_mce_plugin( $plugins ) {
		return array_diff( $plugins, array( 'wpembed' ) );
	}

	/**
	 * Remove all rewrite rules related to embeds.
	 *
	 * @since 2.10
	 * @author Remy Perona
	 *
	 * @param array $rules WordPress rewrite rules.
	 * @return array Rewrite rules without embeds rules.
	 */
	function rocket_disable_embeds_rewrites( $rules ) {
		foreach ( $rules as $rule => $rewrite ) {
			if ( false !== strpos( $rewrite, 'embed=true' ) ) {
				unset( $rules[ $rule ] );
			}
		}

		return $rules;
	}
endif;
