[Forminator] populate select field with posts and calculation value

forminator-select-cpt-options.php

<?php 
/**
* Plugin Name: [Forminator] populate select field with posts and calculation value
* Plugin URI: https://premium.wpmudev.org/
* Description: Populates select field with posts of selected type (label = post title,
* value = post ID ) and sets calculation values for select options based on selected ACF custom post field
* Author: adczk (with adjustments of Prashant Singh)
* Author URI: https://premium.wpmudev.org/
* License: GPLv2 or later
*
* Tested with Forminator  1.23.0
*
* Based directly on this with just a few modifications
* https://gist.github.com/wpmudev-sls/8f5a660e3a8895f4724b7485ad4befea
* 
* config explained in code comment
*
* note: select field must be added manually to the form first
* it doesn't matter if it has options set and what are they
* it needs to have calculations enabled
*
*/

add_filter(	'forminator_cform_render_fields', 'forminator_select_posts_list', 10, 2 );
function forminator_select_posts_list( $wrappers, $form_id ) {

	$allowed_forms = array( 16134 ); // IDs of forms to apply to (separated by comma if more) 
	
	// which select fields to fill in with what post types
	// array key (left) = select field ID
	// array value (right) = post type name
	
	$select_fields_data = array( 
		'select-1' => 'post',
	);
	
	$acf_field = 'price'; // name of ACF field to fetch option calculation value from. 
	

	##### DO NOT EDIT BELOW #####;


	if ( ! in_array( $form_id, $allowed_forms) ) {
		return $wrappers;
	}

	

		foreach ( $wrappers as $wrapper_key => $wrapper ) {
			if ( ! isset( $wrapper[ 'fields' ] ) ) {
				continue;
			}

			if ( 
				isset( $select_fields_data[ $wrapper[ 'fields' ][ 0 ][ 'element_id' ] ] ) &&
				! empty( $select_fields_data[ $wrapper[ 'fields' ][ 0 ][ 'element_id' ] ] )
			) {
				
				
				error_log( print_r( $wrappers[ $wrapper_key ][ 'fields' ][ 0 ][ 'options' ] , true ) );
				
				$pargs = array( 
					'numberposts' => -1,
					'orderby' => 'date',
					'order' => 'DESC', 
					'post_type' => $select_fields_data[ $wrapper[ 'fields' ][ 0 ][ 'element_id' ] ]
				);
				
				
				$posts = get_posts( $pargs );

				if ( ! empty( $posts ) ) {
					$new_options = array();

					foreach( $posts as $post ) {
						
						$new_options[] = array(
							'label' => $post->post_title,
							'value' => $post->ID,
							'limit' => '',
							'key'   => forminator_unique_key(),
							'calculation' => get_field( $acf_field, $post->ID )
						);
						
						$opt_data['options'] = $new_options;
					}

					//$wrappers[ $wrapper_key ][ 'fields' ][ 0 ][ 'options' ] = $new_options;
					$select_field = Forminator_API::get_form_field( $form_id, $wrapper['fields'][0]['element_id'], true );
					if( $select_field && !empty( $opt_data ) ){
						Forminator_API::update_form_field( $form_id, $wrapper['fields'][0]['element_id'], $opt_data );
						$wrappers[ $wrapper_key ][ 'fields' ][ 0 ][ 'options' ] = $new_options;
					}
				}
			}
		}

		return $wrappers;
}