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Gravity Wiz // Gravity Forms // Random Field Order
<?php
/**
* Gravity Wiz // Gravity Forms // Random Fields
*
* Randomly display a specified number of fields on your form.
*
* @version 1.1
* @author David Smith <david@gravitywiz.com>
* @license GPL-2.0+
* @link https://gravitywiz.com/random-fields-with-gravity-forms/
*
* Plugin Name: Gravity Forms Random Fields
* Plugin URI: https://gravitywiz.com/random-fields-with-gravity-forms/
* Description: Randomly display a specified number of fields on your form.
* Author: Gravity Wiz
* Version: 1.1
* Author URI: http://gravitywiz.com
*/
class GFRandomFields {
public $all_random_field_ids;
public $display_count;
public $selected_field_ids = array();
public function __construct( $form_id, $display_count = 5, $random_field_ids = false ) {
$this->_form_id = $form_id;
$this->all_random_field_ids = (array) $random_field_ids;
$this->display_count = $display_count;
add_filter( "gform_pre_render_$form_id", array( $this, 'pre_render' ) );
add_filter( "gform_form_tag_$form_id", array( $this, 'store_selected_field_ids' ) );
add_filter( "gform_validation_$form_id", array( $this, 'validate' ) );
add_filter( "gform_pre_submission_filter_$form_id", array( $this, 'pre_render' ) );
//add_filter( "gform_admin_pre_render_$form_id", array( $this, 'admin_pre_render' ) );
//add_action( 'gform_entry_created', array( $this, 'save_selected_field_ids_meta' ), 10, 2 );
}
public function pre_render( $form ) {
return $this->filter_form_fields( $form, $this->get_selected_field_ids() );
}
public function admin_pre_render( $form ) {
if ( $form['id'] != $this->_form_id ) {
return $form;
}
return $form;
}
public function store_selected_field_ids( $form_tag ) {
$hash = $this->get_selected_field_ids_hash();
$value = implode( ',', $this->get_selected_field_ids() );
$input = sprintf( '<input type="hidden" value="%s" name="gfrf_field_ids_%s">', $value, $hash );
return $form_tag . $input;
}
public function validate( $validation_result ) {
$validation_result['form'] = $this->filter_form_fields( $validation_result['form'], $this->get_selected_field_ids() );
$validation_result['is_valid'] = true;
foreach ( $validation_result['form']['fields'] as $field ) {
if ( $field['failed_validation'] ) {
$validation_result['is_valid'] = false;
}
}
return $validation_result;
}
public function filter_form_fields( $form, $selected_fields ) {
$filtered_fields = array();
foreach ( $form['fields'] as $field ) {
if ( in_array( $field['id'], $this->all_random_field_ids ) ) {
if ( in_array( $field['id'], $selected_fields ) ) {
$filtered_fields[] = $field;
}
} else {
$filtered_fields[] = $field;
}
}
$form['fields'] = $filtered_fields;
return $form;
}
public function get_selected_field_ids( $entry_id = false ) {
// check if class has already init fields
if ( !empty( $this->selected_field_ids ) ) {
return $this->selected_field_ids;
}
$hash = $this->get_selected_field_ids_hash();
// If entry ID is passed, retrieve selected fields IDs from entry meta.
if ( $entry_id ) {
$field_ids = gform_get_meta( $entry_id, "_gfrf_field_ids_{$hash}" );
return is_array( $field_ids ) ? $field_ids : array();
}
// Check if fields have been submitted.
$field_ids = rgpost( "gfrf_field_ids_{$hash}" );
if ( !empty( $field_ids ) ) {
return explode( ',', $field_ids );
}
$field_ids = array();
$keys = array_rand( $this->all_random_field_ids, $this->display_count );
if ( !is_array( $keys ) ) {
$keys = array( $keys );
}
foreach ( $keys as $key ) {
$field_ids[] = $this->all_random_field_ids[$key];
}
$this->selected_field_ids = $field_ids;
return $field_ids;
}
public function get_selected_field_ids_hash() {
return wp_hash( implode( '_', $this->all_random_field_ids ) );
}
public function save_selected_field_ids_meta( $entry, $form ) {
if ( $form['id'] == $this->_form_id ) {
$hash = $this->get_selected_field_ids_hash();
gform_add_meta( $entry['id'], "_gfrf_field_ids_{$hash}", $this->get_selected_field_ids() );
}
}
}
new GFRandomFields( 167, 2, array( 1, 2, 3, 4, 5 ) );
new GFRandomFields( 167, 2, array( 8, 9, 10 ) );
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