Gravity Flow - User Input Validation to prevent step completion without certain data

functions.php

<?php
add_filter( 'gravityflow_validation_user_input', 'step_complete_data_check', 10, 3 );
add_filter( 'gravityflow_validation_user_input', 'step_inprogress_bypass_required', 10, 3 );

function step_complete_data_check( $validation_result, $step, $new_status ) {

    if( ($validation_result['form']['id'] == "121" && rgpost( 'step_id' ) == 40 && $new_status == 'in_progress') ) {
                  
      foreach( $form['fields'] as &$field ) {
        
        if ( $field->id == 16 ) {

            //Check for the value you want to prevent without here
                      
            $validation_result['is_valid'] = false;
            $field->failed_validation = true;
            $field->validation_message = 'You must have X in order to complete the step';
            break;
        }
      }
    }
        
    $validation_result['form'] = $form;

}
    
    return $validation_result;
}


function step_inprogress_bypass_required( $validation_result, $step, $new_status ) {
		
		if( ($validation_result['form']['id'] == "121" && rgpost( 'step_id' ) == 40 && $new_status == 'in_progress') ) {

			$form = $validation_result['form'];
			
			foreach ( $form['fields'] as &$field ) {
				$field->failed_validation = false;
				$field->validation_message = '';
			}

			$validation_result = array(
				'is_valid' => true,
				'form'     => $form,
			);

		}
		
		return $validation_result;
	}