woocommerce/plugins/woocommerce-admin/includes/api/class-wc-admin-rest-admin-notes-controller.php

<?php
/**
 * REST API Admin Notes controller
 *
 * Handles requests to the admin notes endpoint.
 *
 * @package WooCommerce Admin/API
 */

defined( 'ABSPATH' ) || exit;

/**
 * REST API Admin Notes controller class.
 *
 * @package WooCommerce/API
 * @extends WC_REST_CRUD_Controller
 */
class WC_Admin_REST_Admin_Notes_Controller extends WC_REST_CRUD_Controller {

	/**
	 * Endpoint namespace.
	 *
	 * @var string
	 */
	protected $namespace = 'wc/v3';

	/**
	 * Route base.
	 *
	 * @var string
	 */
	protected $rest_base = 'admin/notes';

	/**
	 * Register the routes for admin notes.
	 */
	public function register_routes() {
		register_rest_route(
			$this->namespace, '/' . $this->rest_base, array(
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_items' ),
					'permission_callback' => array( $this, 'get_items_permissions_check' ),
				),
				'schema' => array( $this, 'get_public_item_schema' ),
			)
		);

		register_rest_route(
			$this->namespace, '/' . $this->rest_base . '/(?P<id>[\d-]+)', array(
				'args'   => array(
					'id' => array(
						'description' => __( 'Unique ID for the resource.', 'wc-admin' ),
						'type'        => 'integer',
					),
				),
				array(
					'methods'             => WP_REST_Server::READABLE,
					'callback'            => array( $this, 'get_item' ),
					'permission_callback' => array( $this, 'get_item_permissions_check' ),
				),
				'schema' => array( $this, 'get_public_item_schema' ),
			)
		);
	}

	/**
	 * Get a single note.
	 *
	 * @param WP_REST_Request $request Request data.
	 * @return WP_REST_Response|WP_Error
	 */
	public function get_item( $request ) {
		$note = WC_Admin_Notes::get_note( $request->get_param( 'id' ) );
		if ( is_wp_error( $note ) ) {
			return $note;
		}

		$data = $note->get_data();
		$data = $this->prepare_item_for_response( $data, $request );
		$data = $this->prepare_response_for_collection( $data );

		return rest_ensure_response( $data );
	}

	/**
	 * Get all notes.
	 *
	 * @param WP_REST_Request $request Request data.
	 * @return WP_REST_Response
	 */
	public function get_items( $request ) {
		$per_page = isset( $request['per_page'] ) ? intval( $request['per_page'] ) : 10;
		if ( $per_page <= 0 ) {
			$per_page = 1;
		}

		$page = isset( $request['page'] ) ? intval( $request['page'] ) : 1;
		if ( $page <= 0 ) {
			$page = 1;
		}

		$args = array(
			'per_page' => $per_page,
			'page'     => $page,
		);

		$notes = WC_Admin_Notes::get_notes( 'edit', $args );

		$data = array();
		foreach ( (array) $notes as $note_obj ) {
			$note   = $this->prepare_item_for_response( $note_obj, $request );
			$note   = $this->prepare_response_for_collection( $note );
			$data[] = $note;
		}

		$response = rest_ensure_response( $data );
		$response->header( 'X-WP-Total', WC_Admin_Notes::get_notes_count() );

		return $response;
	}

	/**
	 * Check whether a given request has permission to read a single note.
	 *
	 * @param  WP_REST_Request $request Full details about the request.
	 * @return WP_Error|boolean
	 */
	public function get_item_permissions_check( $request ) {
		if ( ! wc_rest_check_manager_permissions( 'system_status', 'read' ) ) {
			return new WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot list resources.', 'wc-admin' ), array( 'status' => rest_authorization_required_code() ) );
		}

		return true;
	}

	/**
	 * Check whether a given request has permission to read notes.
	 *
	 * @param  WP_REST_Request $request Full details about the request.
	 * @return WP_Error|boolean
	 */
	public function get_items_permissions_check( $request ) {
		if ( ! wc_rest_check_manager_permissions( 'system_status', 'read' ) ) {
			return new WP_Error( 'woocommerce_rest_cannot_view', __( 'Sorry, you cannot list resources.', 'wc-admin' ), array( 'status' => rest_authorization_required_code() ) );
		}

		return true;
	}

	/**
	 * Prepare a note object for serialization.
	 *
	 * @param array           $data Note data.
	 * @param WP_REST_Request $request Request object.
	 * @return WP_REST_Response $response Response data.
	 */
	public function prepare_item_for_response( $data, $request ) {
		$context                   = ! empty( $request['context'] ) ? $request['context'] : 'view';
		$data                      = $this->add_additional_fields_to_object( $data, $request );
		$data['date_created_gmt']  = wc_rest_prepare_date_response( $data['date_created'] );
		$data['date_created']      = wc_rest_prepare_date_response( $data['date_created'], false );
		$data['date_reminder_gmt'] = wc_rest_prepare_date_response( $data['date_reminder'] );
		$data['date_reminder']     = wc_rest_prepare_date_response( $data['date_reminder'], false );
		$data                      = $this->filter_response_by_context( $data, $context );

		// Wrap the data in a response object.
		$response = rest_ensure_response( $data );
		$response->add_links( array(
			'self'       => array(
				'href' => rest_url( sprintf( '/%s/%s/%d', $this->namespace, $this->rest_base, $data['id'] ) ),
			),
			'collection' => array(
				'href' => rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ),
			),
		) );
		/**
		 * Filter a note returned from the API.
		 *
		 * Allows modification of the note data right before it is returned.
		 *
		 * @param WP_REST_Response $response The response object.
		 * @param array            $data The original note.
		 * @param WP_REST_Request  $request  Request used to generate the response.
		 */
		return apply_filters( 'woocommerce_rest_prepare_admin_note', $response, $data, $request );
	}
}