Create gpnf-populate-parent-entry-id.php

gp-nested-forms/gpnf-populate-parent-entry-id.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * Gravity Wiz // Nested Forms // Populate Parent Entry ID
+ * https://gravitywiz.com/documentation/gravity-forms-nested-forms/
+ *
+ * Populate the current parent entry ID (or hash) using the "gpnf_parent_entry_id" dynamic population parameter.
+ * This parameter can only be used for fields in the parent form. To capture in a child form, you must populate 
+ * the parent entry ID in a field on the parent form and then use the {Parent} merge tag to capture the ID in
+ * a child field.
+ */
+add_filter( 'gform_field_value_gpnf_parent_entry_id', function( $value, $field ) {
+
+	// GV condition was pulled from another snippet and is untested.
+	if ( is_callable( 'gravityview_get_context' ) && gravityview_get_context() === 'edit' ) {
+		$value = GravityView_frontend::is_single_entry();
+	} else {
+		$session = new GPNF_Session( $field->formId );
+		$cookie  = $session->get_cookie();
+		if ( $cookie ) {
+			$value = rgar( $cookie, 'hash', '' );
+		} else {
+			// The first time the parent form loads there will be no cookie. Create a hash and set it as the default
+			// hash for this cookie created for this form.
+			$value = $session->make_hashcode();
+			add_filter( "gpnf_session_script_data_{$field->formId}", function( $data ) use ( $value ) {
+				$data['hash'] = $value;
+			} );
+		}
+
+	}
+
+	return $value;
+}, 10, 2 );