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<?php if ( ! defined( 'ABSPATH' ) ) exit;

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/**

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* Class for performing actions incrementally. Internally used for converting submissions, exporting submissions, etc.

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* Very useful when interacting with large amounts of data.

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* @package Ninja Forms

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* @subpackage Classes/Step Processing

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* @license http://opensource.org/licenses/gpl-2.0.php GNU Public License

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* @since 2.7.4

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class NF_Step_Processing

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{

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/**

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* @var action

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var $action = '';

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/**

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* @var step

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var $step = '';

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/**

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* @var total_steps

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var $total_steps = '';

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/**

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* @var redirect

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var $redirect = '';

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/**

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* @var array

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var $errors = array();

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/**

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* @var args

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var $args = array();

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/**

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* Get things rolling

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* @since 2.7.4

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* @return void

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function __construct() {

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//Bail if we aren't in the admin.

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if ( ! is_admin() )

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return false;

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if ( ! WPN_Helper::is_func_disabled( 'ignore_user_abort' ) ) {

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ignore_user_abort( true );

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}

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// if ( ! nf_is_func_disabled( 'set_time_limit' ) && ! ini_get( 'safe_mode' ) ) {

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// //set_time_limit( 0 );

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// }

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// Ajax call handled in 'processing' in this file

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add_action( 'wp_ajax_nf_' . $this->action, array( $this, 'processing' ) );

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}

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/**

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* Process our request.

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* Call the appropriate loading or step functions.

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* @since 2.7.6

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* @return void

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public function processing() {

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// Get our passed arguments. These come from the querysting of the processing page.

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if ( isset ( $_REQUEST['args'] ) ) {

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$this->args = WPN_Helper::sanitize_text_field($_REQUEST['args']);

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if ( isset ( $this->args['redirect'] ) ) {

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if( wp_validate_redirect( $this->args['redirect'] ) ){

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$this->redirect = wp_sanitize_redirect( $this->args['redirect'] );

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}

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}

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} else {

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$this->args = array();

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}

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// Get our current step.

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$this->step = isset ( $_REQUEST['step'] )? esc_html( $_REQUEST['step'] ) : 'loading';

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// Get our total steps

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$this->total_steps = isset ( $_REQUEST['total_steps'] )? esc_html( $_REQUEST['total_steps'] ) : 0;

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// If our step is loading, then we need to return how many total steps there are along with the next step, which is 1.

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if ( 'loading' == $this->step ) {

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$return = $this->loading();

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if ( ! isset ( $return['step'] ) ) {

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$saved_step = get_user_option( 'nf_step_processing_' . $this->action . '_step' );

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if ( ! empty ( $saved_step ) ) {

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$this->step = $saved_step;

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} else {

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$this->step = 1;

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}

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$return['step'] = $this->step;

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}

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if ( ! isset ( $return['complete'] ) ) {

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$return['complete'] = false;

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}

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} else { // We aren't on the loading step, so do our processing.

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$return = $this->step();

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if ( ! isset ( $return['step'] ) ) {

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$this->step++;

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$return['step'] = $this->step;

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}

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if ( ! isset ( $return['complete'] ) ) {

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if ( $this->step > $this->total_steps ) {

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$complete = true;

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} else {

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$complete = false;

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}

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$return['complete'] = $complete;

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}

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$return['total_steps'] = $this->total_steps;

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}

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$user_id = get_current_user_id();

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if ( $return['complete'] ) {

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// Delete our step option

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delete_user_option( $user_id, 'nf_step_processing_' . $this->action . '_step' );

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// Set our redirect variable.

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$return['redirect'] = $this->redirect;

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// Run our complete function

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$this->complete();

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} else {

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// Save our current step so that we can resume if necessary

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update_user_option( $user_id, 'nf_step_processing_' . $this->action . '_step', $this->step );

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}

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if ( isset ( $this->redirect ) && ! empty ( $this->redirect ) ) {

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$this->args['redirect'] = $this->redirect;

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}

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$return['errors'] = ( $this->errors ) ? $this->errors : FALSE;

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$return['args'] = $this->args;

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echo json_encode( $return );

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die();

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}

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/**

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* Run our loading process.

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* This function should be overwritten in child classes.

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* @since 2.7.4

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* @return array $args

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public function loading() {

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// This space left intentionally blank.

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}

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/**

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* This function is called for every step.

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* This function should be overwritten in child classes.

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* @since 2.7.4

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* @return array $args

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public function step() {

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// This space left intentionally blank.

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}

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/**

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* This function is called for every step.

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* This function should be overwritten in child classes.

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* @since 2.7.4

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* @return array $args

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public function complete() {

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// This space left intentionally blank.

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}

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}

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