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wp-content/plugins/jetpack/_inc/site-switcher-endpoint.php

@@ -0,0 +1,96 @@
+<?php
+/**
+ * Site Switcher REST API Endpoint
+ * Jetpack-only endpoint for fetching compact sites list
+ *
+ * @package automattic/jetpack
+ */
+
+use Automattic\Jetpack\Connection\Client;
+use Automattic\Jetpack\Connection\Manager as Connection_Manager;
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit( 0 );
+}
+
+/**
+ * Register REST API endpoint to fetch compact sites list from WordPress.com
+ */
+function jetpack_site_switcher_register_rest_routes() {
+	register_rest_route(
+		'jetpack/v4',
+		'/sites/compact',
+		array(
+			'methods'             => WP_REST_Server::READABLE,
+			'callback'            => 'jetpack_site_switcher_get_sites',
+			'permission_callback' => 'jetpack_site_switcher_permission_check',
+		)
+	);
+}
+
+/**
+ * Check if the current user is connected to WordPress.com
+ *
+ * @return bool True if user is connected, false otherwise
+ */
+function jetpack_site_switcher_permission_check() {
+	if ( ! is_user_logged_in() ) {
+		return false;
+	}
+
+	$connection_manager = new Connection_Manager();
+	return $connection_manager->is_user_connected();
+}
+add_action( 'rest_api_init', 'jetpack_site_switcher_register_rest_routes' );
+
+/**
+ * Fetch compact sites list from WordPress.com API
+ *
+ * @return WP_REST_Response|WP_Error
+ */
+function jetpack_site_switcher_get_sites() {
+	$response = Client::wpcom_json_api_request_as_user(
+		'/me/sites/compact',
+		'v1.1',
+		array( 'method' => 'GET' ),
+		null,
+		'rest'
+	);
+
+	if ( is_wp_error( $response ) ) {
+		return new WP_Error(
+			'jetpack_site_switcher_request_failed',
+			sprintf(
+				/* translators: %s: Error message from the API request */
+				__( 'Failed to connect to WordPress.com: %s', 'jetpack' ),
+				$response->get_error_message()
+			),
+			array( 'status' => 500 )
+		);
+	}
+
+	$response_code = wp_remote_retrieve_response_code( $response );
+	if ( 200 !== $response_code ) {
+		return new WP_Error(
+			'jetpack_site_switcher_api_error',
+			sprintf(
+				/* translators: %d: HTTP status code */
+				__( 'WordPress.com API returned error (HTTP %d)', 'jetpack' ),
+				$response_code
+			),
+			array( 'status' => $response_code )
+		);
+	}
+
+	$body = json_decode( wp_remote_retrieve_body( $response ), true );
+
+	if ( ! isset( $body['sites'] ) ) {
+		return new WP_Error(
+			'jetpack_site_switcher_invalid_response',
+			__( 'WordPress.com API response missing sites data', 'jetpack' ),
+			array( 'status' => 500 )
+		);
+	}
+
+	return rest_ensure_response( $body );
+}