register-on-gateway-success.php

<?php

const JFB_CUSTOM_HIDDEN_SOURCE = '_generated_password';
const JFB_CUSTOM_ATTR_KEY      = 'clear_on_gateway_success';

add_filter(
	'jet-form-builder/editor/hidden-field/config',
	function ( array $config ) {
		$config['sources'][] = array(
			'value' => JFB_CUSTOM_HIDDEN_SOURCE,
			'label' => __( 'Generated Password', 'jet-form-builder' ),
		);

		return $config;
	}
);

add_filter(
	'jet-form-builder/fields/hidden-field/value-cb',
	function ( $callback, $field_value ) {
		if ( JFB_CUSTOM_HIDDEN_SOURCE !== $field_value ) {
			return $callback;
		}

		return function () {
			return \Jet_Form_Builder\Classes\Security\Csrf_Tools::generate();
		};
	},
	10, 2
);

add_filter(
	'jet-form-builder/on-save-record/field-attributes',
	function ( $attrs, $field_type ) {
		$field_value = $attrs['field_value'] ?? '';

		if ( 'hidden-field' !== $field_type && JFB_CUSTOM_HIDDEN_SOURCE !== $field_value ) {
			return $attrs;
		}

		$attrs[ JFB_CUSTOM_ATTR_KEY ] = true;

		return $attrs;
	},
	10, 2
);

add_action(
	'jet-form-builder/before-trigger-event',
	/** @var $event \Jet_Form_Builder\Actions\Events\Base_Event */
	function ( $event ) {
		if ( ! is_a( $event, \Jet_Form_Builder\Actions\Events\Gateway_Success\Gateway_Success_Event::class ) ) {
			return;
		}
		try {
			$record = jet_fb_gateway_current()->query_scenario()->get_scenario_row( 'record' );
		} catch ( \Jet_Form_Builder\Exceptions\Gateway_Exception $exception ) {
			return;
		}

		try {
			$field = \Jet_Form_Builder\Actions\Methods\Form_Record\Query_Views\Record_Fields_View::findOne(
				array(
					array(
						'type'   => 'like',
						'values' => array( 'field_attrs', JFB_CUSTOM_ATTR_KEY ),
					),
					'record_id' => $record['id'] ?? 0,
				)
			)->query()->query_one();
		} catch ( \Jet_Form_Builder\Exceptions\Query_Builder_Exception $exception ) {
			return;
		}

		$name = $field['field_name'] ?? '';

		jet_fb_action_handler()->request_data[ $name ] = \Jet_Form_Builder\Classes\Security\Csrf_Tools::generate();
	}
);