Gravityform - update ACF Repeater subfield mixed with dynamic pre-populate fields - dynamic

Question

I have an ACF repeater field that create Courses with a certain amount of place available. This repeater is on each single custom-post-type courses.
In the other hand, I have a Gravityform that have a radio field who is auto-populated with those ACF repeater:
add_filter( 'gform_pre_render_3', 'populate_posts' );
add_filter( 'gform_pre_validation_3', 'populate_posts' );
add_filter( 'gform_pre_submission_filter_3', 'populate_posts' );
add_filter( 'gform_admin_pre_render_3', 'populate_posts' );
function populate_posts( $form ) {
foreach ( $form['fields'] as &$field ) {
// Vient check tous les fields du formulaire
if ( $field->type != 'radio' || strpos( $field->cssClass, 'populate-posts' ) === false ) {
// Choisit seulement les fields de type [radio] qui ont la class [populate-posts]
continue;
}
$date_type = get_field( 'date_type' );
$range_dates = get_field( 'date_range_repeater' );
$sinlge_dates = get_field( 'sinlge_dates_repeater' );
$choices = array();
if( $date_type === 'date_type_range' ){
foreach ( $range_dates as $range_date ) {
$dateformatstring = "j F Y";
$dateclean_start = strtotime( $range_date['date_starting'] );
$final_date_start = date_i18n($dateformatstring, $dateclean_start);
$dateclean_end = strtotime( $range_date['date_ending'] );
$final_date_end = date_i18n($dateformatstring, $dateclean_end);
$choices[] = array(
'text' => 'Du '.$final_date_start.' au '.$final_date_end.'<br />'.$range_date['availability'].' places disponibles',
'value' => 'Du '.$final_date_start.' au '.$final_date_end
);
}
}elseif( $date_type === 'date_type_single' ){
foreach ( $sinlge_dates as $sinlge_date ) {
$dateformatstring = "j F Y";
$dateclean_start = strtotime( $sinlge_date['date_starting'] );
$final_date_start = date_i18n($dateformatstring, $dateclean_start);
$dateclean_end = strtotime( $sinlge_date['date_ending'] );
$final_date_end = date_i18n($dateformatstring, $dateclean_end);
$choices[] = array(
'text' => 'Du '.$final_date_start.' au '.$final_date_end.'<br />'.$sinlge_date['availability'].' places disponibles',
'value' => 'Du '.$final_date_start.' au '.$final_date_end
);
}
}else{}
// update 'Select a Post' to whatever you'd like the instructive option to be
$field->placeholder = 'Select a Post';
$field->choices = $choices;
}
return $form;
}
I want that after each submission the available place number decrease from 1. I have figured out how to manage this with this ACF function:
https://www.advancedcustomfields.com/resources/update_sub_field/
This is my code for this:
add_action( 'gform_after_submission', 'set_post_content', 10, 2 );
function set_post_content( $entry, $form ) {
//$radio_value = rgar( $entry, '11' );
$repeater = 'date_range_repeater';
$acf_repeater = get_field('date_range_repeater' ); // get all the rows
$row = 0;
$specific_row = $acf_repeater[$row];
$sub_field = 'availability';
$current_availability = $specific_row['availability'];
$availability_new = --$current_availability;
update_sub_field( array($repeater, ++$row, $sub_field), $availability_new );
//echo $radio_value;
}
The thing is I have to select manually which row must be used to update de subfield. How can I manage to detect in which ACF repeater row is my submitted value ?
Thanks !

Answer 1

Maybe you can add some hidden fields in your GF and populate them in your function populate_posts( $form ){}like that you should have accessible directly in your after_submit function.