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Revision Autor Zeilennr. Zeile
148 lars 1 
<?php
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declare(strict_types=1);
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/*
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 * This file is a part of dflydev/dot-access-data.
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 *
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 * (c) Dragonfly Development Inc.
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 *
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 * For the full copyright and license information, please view the LICENSE
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 * file that was distributed with this source code.
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 */
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namespace Dflydev\DotAccessData;
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class Util
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{
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    /**
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     * Test if array is an associative array
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     *
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     * Note that this function will return true if an array is empty. Meaning
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     * empty arrays will be treated as if they are associative arrays.
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     *
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     * @param array<mixed> $arr
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     *
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     * @return bool
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     *
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     * @psalm-pure
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     */
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    public static function isAssoc(array $arr): bool
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    {
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        return !count($arr) || count(array_filter(array_keys($arr), 'is_string')) == count($arr);
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    }
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    /**
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     * Merge contents from one associtative array to another
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     *
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     * @param mixed $to
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     * @param mixed $from
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     * @param DataInterface::PRESERVE|DataInterface::REPLACE|DataInterface::MERGE $mode
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     *
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     * @return mixed
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     *
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     * @psalm-pure
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     */
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    public static function mergeAssocArray($to, $from, int $mode = DataInterface::REPLACE)
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    {
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        if ($mode === DataInterface::MERGE && self::isList($to) && self::isList($from)) {
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            return array_merge($to, $from);
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        }
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        if (is_array($from) && is_array($to)) {
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            foreach ($from as $k => $v) {
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                if (!isset($to[$k])) {
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                    $to[$k] = $v;
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                } else {
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                    $to[$k] = self::mergeAssocArray($to[$k], $v, $mode);
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                }
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            }
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            return $to;
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        }
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        return $mode === DataInterface::PRESERVE ? $to : $from;
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    }
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    /**
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     * @param mixed $value
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     *
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     * @return bool
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     *
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     * @psalm-pure
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     */
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    private static function isList($value): bool
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    {
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        return is_array($value) && array_values($value) === $value;
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    }
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}