gw-list-field-as-choices.php: Add gwlfac_list_field_values filter to allow filtering the List field values that will be used to populate choices.

gravity-forms/gw-list-field-as-choices-usage.php

@@ -34,3 +34,27 @@
 	'label_template'   => '{Name} <span style="color:#999;font-style:italic;">({Age})</span>',
 	'value_template'   => '{Name}',
 ) );
+
+# Filter Usage
+
+## Customize List field values to be populated as choices based on Gravity Flow User Input step.
+add_filter( 'gwlfac_list_field_values', function( $values, $form, $args ) {
+    if ( is_array( $values ) ) {
+		return $values;
+	}
+
+	// Confirm we are within a Gravity Flow Inbox.
+    if ( rgget( 'lid' ) && rgget( 'page') == 'gravityflow-inbox' ) {
+        $entry = GFAPI::get_entry( (int) rgget( 'lid' ) );
+        // Verify the entry list field has previously stored values to use.
+        if ( $entry ) {
+            $values = unserialize( $entry[ $args['list_field_id'] ] );
+            if ( ! is_array( $values ) ) {
+                return false;
+            } else {
+                return $values;
+            }
+        }
+    }
+	return false;
+}, 10, 3 );

gravity-forms/gw-list-field-as-choices.php

@@ -48,6 +48,15 @@ function populate_choice_fields( $form ) {
 		$list_field = GFFormsModel::get_field( $form, $this->_args['list_field_id'] );
 		$values     = GFFormsModel::get_field_value( $list_field );
 
+		/**
+		 * Filter the values from the List field that will be used to populate field choices.
+		 *
+		 * @param array|mixed|string $values The List field values that will be used to populate field choices.
+		 * @param array              $form   The current form.
+		 * @param array				 $args   The arguments used to initialize this instance of GW_List_Field_As_Choices.
+		 */
+		$values = apply_filters( 'gwlfac_list_field_values', $values, $form, $this->_args );
+
 		// if list field doesn't have any values, let's ditch this party
 		if ( ! is_array( $values ) ) {
 			return $form;