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<?php if ( ! defined( 'ABSPATH' ) ) { exit; // Exit if accessed directly } if ( ! class_exists( 'ACF_Ajax' ) ) : class ACF_Ajax { /** @var string The AJAX action name. */ var $action = ''; /** @var array The $_REQUEST data. */ var $request; /** @var boolean Prevents access for non-logged in users. */ var $public = false; /** * __construct * * Sets up the class functionality. * * @date 31/7/18 * @since 5.7.2 * * @param void * @return void */ function __construct() { $this->initialize(); $this->add_actions(); } /** * has * * Returns true if the request has data for the given key. * * @date 31/7/18 * @since 5.7.2 * * @param string $key The data key. * @return boolean */ function has( $key = '' ) { return isset( $this->request[ $key ] ); } /** * get * * Returns request data for the given key. * * @date 31/7/18 * @since 5.7.2 * * @param string $key The data key. * @return mixed */ function get( $key = '' ) { return isset( $this->request[ $key ] ) ? $this->request[ $key ] : null; } /** * Sets request data for the given key. * * @date 31/7/18 * @since 5.7.2 * * @param string $key The data key. * @param mixed $value The data value. * @return ACF_Ajax */ function set( $key = '', $value = null ) { $this->request[ $key ] = $value; return $this; } /** * initialize * * Allows easy access to modifying properties without changing constructor. * * @date 31/7/18 * @since 5.7.2 * * @param void * @return void */ function initialize() { /* do nothing */ } /** * add_actions * * Adds the ajax actions for this response. * * @date 31/7/18 * @since 5.7.2 * * @param void * @return void */ function add_actions() { // add action for logged-in users add_action( "wp_ajax_{$this->action}", array( $this, 'request' ) ); // add action for non logged-in users if ( $this->public ) { add_action( "wp_ajax_nopriv_{$this->action}", array( $this, 'request' ) ); } } /** * request * * Callback for ajax action. Sets up properties and calls the get_response() function. * * @date 1/8/18 * @since 5.7.2 * * @param void * @return void */ function request() { // Store data for has() and get() functions. $this->request = wp_unslash( $_REQUEST ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended -- Verified below in verify_request(). // Verify request and handle error. $error = $this->verify_request( $this->request ); if ( is_wp_error( $error ) ) { $this->send( $error ); } // Send response. $this->send( $this->get_response( $this->request ) ); } /** * Verifies the request. * * @date 9/3/20 * @since 5.8.8 * * @param array $request The request args. * @return (bool|WP_Error) True on success, WP_Error on fail. */ function verify_request( $request ) { // Verify nonce. if ( ! acf_verify_ajax() ) { return new WP_Error( 'acf_invalid_nonce', __( 'Invalid nonce.', 'acf' ), array( 'status' => 404 ) ); } return true; } /** * get_response * * Returns the response data to sent back. * * @date 31/7/18 * @since 5.7.2 * * @param array $request The request args. * @return mixed The response data or WP_Error. */ function get_response( $request ) { return true; } /** * send * * Sends back JSON based on the $response as either success or failure. * * @date 31/7/18 * @since 5.7.2 * * @param mixed $response The response to send back. * @return void */ function send( $response ) { // Return error. if ( is_wp_error( $response ) ) { $this->send_error( $response ); // Return success. } else { wp_send_json( $response ); } } /** * Sends a JSON response for the given WP_Error object. * * @date 8/3/20 * @since 5.8.8 * * @param WP_Error error The error object. * @return void */ function send_error( $error ) { // Get error status $error_data = $error->get_error_data(); if ( is_array( $error_data ) && isset( $error_data['status'] ) ) { $status_code = $error_data['status']; } else { $status_code = 500; } wp_send_json( array( 'code' => $error->get_error_code(), 'message' => $error->get_error_message(), 'data' => $error->get_error_data(), ), $status_code ); } } endif; // class_exists check
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