<?php

namespace Kanboard\Helper;

use Kanboard\Core\Base;

/**
 * Model Helper
 *
 * @package helper
 * @author  Frederic Guillot
 */
class ModelHelper extends Base
{
    /**
     * Remove keys from an array
     *
     * @access public
     * @param  array     $values    Input array
     * @param  string[]  $keys      List of keys to remove
     */
    public function removeFields(array &$values, array $keys)
    {
        foreach ($keys as $key) {
            if (array_key_exists($key, $values)) {
                unset($values[$key]);
            }
        }
    }

    /**
     * Remove keys from an array if empty
     *
     * @access public
     * @param  array     $values    Input array
     * @param  string[]  $keys      List of keys to remove
     */
    public function removeEmptyFields(array &$values, array $keys)
    {
        foreach ($keys as $key) {
            if (array_key_exists($key, $values) && empty($values[$key])) {
                unset($values[$key]);
            }
        }
    }

    /**
     * Force fields to be at 0 if empty
     *
     * @access public
     * @param  array        $values    Input array
     * @param  string[]     $keys      List of keys
     */
    public function resetFields(array &$values, array $keys)
    {
        foreach ($keys as $key) {
            if (isset($values[$key]) && empty($values[$key])) {
                $values[$key] = 0;
            }
        }
    }

    /**
     * Force some fields to be integer
     *
     * @access public
     * @param  array        $values    Input array
     * @param  string[]     $keys      List of keys
     */
    public function convertIntegerFields(array &$values, array $keys)
    {
        foreach ($keys as $key) {
            if (isset($values[$key])) {
                $values[$key] = (int) $values[$key];
            }
        }
    }

    /**
     * Force some fields to be null if empty
     *
     * @access public
     * @param  array        $values    Input array
     * @param  string[]     $keys      List of keys
     */
    public function convertNullFields(array &$values, array $keys)
    {
        foreach ($keys as $key) {
            if (array_key_exists($key, $values) && empty($values[$key])) {
                $values[$key] = null;
            }
        }
    }
}