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ajax.php
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ajax.php
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<?php
/**
* AnsPress ajax abstract class.
*
* @author Rahul Aryan <support@rahularyan.com>
* @copyright 2014 anspress.net & Rahul Aryan
* @license GPL-3.0+ https://www.gnu.org/licenses/gpl-3.0.txt
* @link https://anspress.net
* @package AnsPress
* @since 4.1.8
*/
namespace AnsPress\Classes;
// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
die;
}
/**
* A class to be used as a base for all ajax classes.
*
* @since 4.1.8
*/
abstract class Ajax extends \AnsPress\Singleton {
/**
* The response array.
*
* @var array
*/
private $res = array();
/**
* The ajax action.
*
* @var string
*/
public $action = '';
/**
* Ajax status.
*
* @var boolean
*/
public $success = false;
/**
* The default nonce key.
*
* @var string
*/
public $nonce_key = 'ap_default';
/**
* All request values.
*
* @var array
*/
public $req;
/**
* Class constructor.
*/
protected function __construct() {
$this->set_action();
$this->verify_nonce();
$this->verify_permission();
if ( is_user_logged_in() ) {
$this->logged_in();
} else {
$this->nopriv();
}
$this->send();
}
/**
* Set ajax action.
*/
protected function set_action() {
$this->action = 'ap_' . strtolower( ( new \ReflectionClass( $this ) )->getShortName() );
}
/**
* Method for logged in users.
*
* @return void
*/
public function logged_in() {
}
/**
* Method for non logged in users.
*
* @return void
*/
public function nopriv() {
}
/**
* Add response key => value pair.
*
* @param string $key Key.
* @param mixed $val Value.
* @return void
*/
public function add_res( $key, $val ) {
$this->res[ $key ] = $val;
}
/**
* Verify nonce and die if failed.
*
* Nonce key is stored in `$nonce_key` property. To bypass verification
* simply set `$nonce_key` to an empty value.
*
* @return void
*/
private function verify_nonce() {
if ( empty( $this->nonce_key ) ) {
return;
}
$nonce = ap_sanitize_unslash( '__nonce', 'r' );
// Verify nonce.
if ( ! wp_verify_nonce( $nonce, $this->nonce_key ) ) {
$this->snackbar( __( 'Trying to cheat?!', 'anspress-question-answer' ) );
$this->send();
}
}
/**
* Verify permission of a user.
*
* By default this method need to override from child class.
* If not overridden then ajax will always fail at this point.
*
* @return void
*/
protected function verify_permission() {
$this->set_fail();
$this->snackbar( __( 'You don\'t have enough permissions to do this action.', 'anspress-question-answer' ) );
$this->send();
}
/**
* Set ajax as success.
*
* @return void
*/
public function set_success() {
$this->success = true;
}
/**
* Set ajax as fail.
*
* @return void
*/
public function set_fail() {
$this->success = false;
}
/**
* Add snackbar.
*
* @param string $msg Snackbar message.
* @return void
*/
public function snackbar( $msg ) {
$this->res['snackbar'] = array(
'message' => $msg,
);
}
/**
* Get and set request.
*
* @param string $key Request key.
* @param mixed $val Request value.
* @return mixed
*/
public function req( $key, $val = null ) {
if ( null === $val && ! isset( $this->req[ $key ] ) ) {
return;
}
if ( null === $val ) {
return $this->req[ $key ];
}
$this->req[ $key ] = $val;
}
/**
* Send ajax response.
*
* @return void
*/
public function send() {
$this->add_res( 'success', $this->success );
$this->add_res( 'action', $this->action );
// Add snackbar message by default if not success.
if ( false === $this->success && empty( $this->res['snackbar'] ) ) {
$this->snackbar( __( 'Something went wrong.', 'anspress-question-answer' ) );
}
ap_send_json( $this->res );
}
}