zmshurik/project-lvl2-s173

<?php

namespace Differ\Gendiff;

use function Differ\Parser\parse;
use function Differ\Renderers\Renderer\render;

function getNestedTree($data)
{
    $nestedTree = array_map(function ($key) use ($data) {
        $children = is_array($data[$key]) ? getNestedTree($data[$key]) : [];
        return ['name' => $key, 'value' => $data[$key], 'type' => 'nested', 'children' => $children];
    }, array_keys($data));
    return array_values($nestedTree);
}

function getDiffAst($data1, $data2)
{
    $typeMap = [
        'need check in deep' => [
            'getItem' => function ($key) use ($data1, $data2) {
                $children = getDiffAst($data1[$key], $data2[$key]);
                return ['name' => $key, 'type' => 'need check in deep', 'children' => $children];
            },
            'isNeedType' => function ($key) use ($data1, $data2) {
                return array_key_exists($key, $data1) &&
                array_key_exists($key, $data2) &&
                (is_array($data1[$key]) && is_array($data2[$key]));
            }
        ],
        'not changed' => [
            'getItem' => function ($key) use ($data1) {
                return ['name' => $key, 'oldValue' => $data1[$key], 'type' => 'not changed', 'children' => []];
            },
            'isNeedType' => function ($key) use ($data1, $data2) {
                return array_key_exists($key, $data1) &&
                array_key_exists($key, $data2) &&
                $data1[$key] == $data2[$key] &&
                !(is_array($data1[$key]) && is_array($data2[$key]));
            }
        ],
        'changed' => [
            'getItem' => function ($key) use ($data1, $data2) {
                return [
                    'name' => $key,
                    'oldValue' => $data1[$key],
                    'type' => 'changed',
                    'newValue' => $data2[$key],
                    'children' => []
                ];
            },
            'isNeedType' => function ($key) use ($data1, $data2) {
                return array_key_exists($key, $data1) &&
                 array_key_exists($key, $data2) &&
                  $data1[$key] != $data2[$key] &&
                  !(is_array($data1[$key]) && is_array($data2[$key]));
            }
        ],
        'deleted' => [
            'getItem' => function ($key) use ($data1) {
                $children = is_array($data1[$key]) ? getNestedTree($data1[$key]) : [];
                return ['name' => $key, 'oldValue' => $data1[$key], 'type' => 'deleted', 'children' => $children];
            },
            'isNeedType' => function ($key) use ($data1, $data2) {
                return array_key_exists($key, $data1) && !array_key_exists($key, $data2);
            }
        ],
        'added' => [
            'getItem' => function ($key) use ($data2) {
                $children = is_array($data2[$key]) ? getNestedTree($data2[$key]) : [];
                return ['name' => $key, 'newValue' => $data2[$key], 'type' => 'added', 'children' => $children];
            },
            'isNeedType' => function ($key) use ($data1, $data2) {
                return !array_key_exists($key, $data1) && array_key_exists($key, $data2);
            }
        ]
    ];
    $unionKeys = \Funct\Collection\union(array_keys($data1), array_keys($data2));
    $result = array_map(function ($key) use ($typeMap) {
        list($typeFunctions) = array_values(array_filter($typeMap, function ($current) use ($key) {
            $isNeedType = $current['isNeedType'];
            return $isNeedType($key);
        }));
        $getItem = $typeFunctions['getItem'];
        return $getItem($key);
    }, $unionKeys);
    return array_values($result);
}

function genDiff($format, $file1, $file2)
{
    $content1 = file_get_contents($file1);
    $content2 = file_get_contents($file2);
    $fileType1 = pathinfo($file1, PATHINFO_EXTENSION);
    $fileType2 = pathinfo($file2, PATHINFO_EXTENSION);
    $data1 = parse($content1, $fileType1);
    $data2 = parse($content2, $fileType2);
    $diffAst = getDiffAst($data1, $data2);
    return render($diffAst, $format);
}