<?php

namespace CleantalkSP\Common\Helpers;

/**
 * Class Arr
 * Gather static functions designed to ease work with arrays
 *
 * @version       1.0.0
 * @package       CleantalkSP\Common\Helpers
 * @author        Cleantalk team (welcome@cleantalk.org)
 * @copyright (C) 2014 CleanTalk team (http://cleantalk.org)
 * @license       GNU/GPL: http://www.gnu.org/copyleft/gpl.html
 * @see           https://github.com/CleanTalk/security-malware-firewall
 */
class Arr
{
    /**
     * @param array $arr
     *
     * @return bool
     * @psalm-suppress PossiblyUnusedMethod
     */
    public static function reindex(&$arr)
    {
        if (! count($arr)) {
            return false;
        }

        for ($reindex_key = 0, $key = 0, $max_key = max(array_keys($arr)); $key <= $max_key; $key++) {
            if (isset($arr[$key])) {
                if ($reindex_key === $key) {
                    $reindex_key++;
                    continue;
                }

                $arr[$reindex_key++] = $arr[$key];
                unset($arr[$key]);
            }
        }

        return true;
    }

    /**
     * Merging arrays without reseting numeric keys
     *
     * @param array $arr1 One-dimentional array
     * @param array $arr2 One-dimentional array
     *
     * @return array Merged array
     * @psalm-suppress PossiblyUnusedMethod
     */
    public static function mergeWithSavingNumericKeys($arr1, $arr2)
    {
        foreach ($arr2 as $key => $val) {
            $arr1[$key] = $val;
        }

        return $arr1;
    }

    /**
     * Merging arrays without reseting numeric keys recursive
     *
     * @param array $arr1 One-dimentional array
     * @param array $arr2 One-dimentional array
     *
     * @return array Merged array
     */
    public static function mergeWithSavingNumericKeysRecursive($arr1, $arr2)
    {
        foreach ($arr2 as $key => $val) {
            // Array | array => array
            if (isset($arr1[$key]) && is_array($arr1[$key]) && is_array($val)) {
                $arr1[$key] = self::mergeWithSavingNumericKeysRecursive($arr1[$key], $val);
                // Scalar | array => array
            } elseif (isset($arr1[$key]) && ! is_array($arr1[$key]) && is_array($val)) {
                $tmp = $arr1[$key];
                $arr1[$key] = $val;
                $arr1[$key][] = $tmp;
                // array  | scalar => array
            } elseif (isset($arr1[$key]) && is_array($arr1[$key]) && ! is_array($val)) {
                $arr1[$key][] = $val;
                // scalar | scalar => scalar
            } else {
                $arr1[$key] = $val;
            }
        }

        return $arr1;
    }

    /**
     * Modifies the array $array. Paste $insert on $position
     *
     * @param array $array
     * @param int|string $position
     * @param mixed $insert
     */
    public static function insert(&$array, $position, $insert)
    {
        if (is_int($position)) {
            array_splice($array, $position, 0, $insert);
        } else {
            $pos   = array_search($position, array_keys($array));
            $array = array_merge(
                array_slice($array, 0, $pos),
                $insert,
                array_slice($array, $pos)
            );
        }
    }
}