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wp-content/plugins/query-monitor/dispatchers/REST.php

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+<?php declare(strict_types = 1);
+/**
+ * REST API request dispatcher.
+ *
+ * @package query-monitor
+ */
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+class QM_Dispatcher_REST extends QM_Dispatcher {
+
+	public $id = 'rest';
+
+	public function __construct( QM_Plugin $qm ) {
+		parent::__construct( $qm );
+
+		add_filter( 'rest_post_dispatch', array( $this, 'filter_rest_post_dispatch' ), 1 );
+
+	}
+
+	/**
+	 * Filters a REST API response in order to add QM's headers.
+	 *
+	 * @param WP_HTTP_Response $result  Result to send to the client. Usually a WP_REST_Response.
+	 * @return WP_HTTP_Response Result to send to the client.
+	 */
+	public function filter_rest_post_dispatch( WP_HTTP_Response $result ) {
+
+		if ( ! $this->should_dispatch() ) {
+			return $result;
+		}
+
+		$this->before_output();
+
+		/** @var array<string, QM_Output_Headers> $outputters */
+		$outputters = $this->get_outputters( 'headers' );
+
+		foreach ( $outputters as $output ) {
+			$output->output();
+		}
+
+		$this->after_output();
+
+		return $result;
+
+	}
+
+	/**
+	 * @return void
+	 */
+	protected function before_output() {
+		foreach ( (array) glob( $this->qm->plugin_path( 'output/headers/*.php' ) ) as $file ) {
+			include_once $file;
+		}
+	}
+
+	/**
+	 * @return bool
+	 */
+	public function is_active() {
+
+		# If the headers have already been sent then we can't do anything about it
+		if ( headers_sent() ) {
+			return false;
+		}
+
+		if ( ! defined( 'REST_REQUEST' ) || ! REST_REQUEST ) {
+			return false;
+		}
+
+		if ( ! self::user_can_view() ) {
+			return false;
+		}
+
+		return true;
+
+	}
+
+}
+
+/**
+ * @param array<string, QM_Dispatcher> $dispatchers
+ * @param QM_Plugin $qm
+ * @return array<string, QM_Dispatcher>
+ */
+function register_qm_dispatcher_rest( array $dispatchers, QM_Plugin $qm ) {
+	$dispatchers['rest'] = new QM_Dispatcher_REST( $qm );
+	return $dispatchers;
+}
+
+add_filter( 'qm/dispatchers', 'register_qm_dispatcher_rest', 10, 2 );