Prionyx/project-lvl2-s197

<?php

namespace Diff\AST;

function getNode($key, $content1, $content2, $nodeTypes)
{
    $action = array_filter($nodeTypes, function ($item) use ($key, $content1, $content2) {
        return ($item['check']($key, $content1, $content2));
    });
    $node = array_shift($action)['action']($key, $content1, $content2);
    return $node;
}

function getAST($content1, $content2)
{
    $nodeTypes = [
      [
        "type" => 'nested',
        "check" => function ($key, $content1, $content2) {
            return ((in_array($key, array_keys($content1)) && in_array($key, array_keys($content2))) && (is_array($content1[$key]) && is_array($content2[$key])));
        },
        "action" => function ($key, $content1, $content2) {
            return ["type" => 'nested', "key" => $key, "children" => getAST($content1[$key], $content2[$key])];
        }
      ],
      [
        "type" => 'changed',
        "check" => function ($key, $content1, $content2) {
            return (in_array($key, array_keys($content1)) && in_array($key, array_keys($content2)) && $content1[$key] !== $content2[$key]);
        },
        "action" => function ($key, $content1, $content2) {
            $oldValue = $content1[$key];
            $newValue = $content2[$key];
            return ["type" => 'changed', 'key' => $key, 'newValue' => $newValue, "oldValue" => $oldValue];
        }
      ],
      [
        "type" => 'unchanged',
        "check" => function ($key, $content1, $content2) {
            return (in_array($key, array_keys($content1)) && in_array($key, array_keys($content2)) && $content1[$key] === $content2[$key]);
        },
        "action" => function ($key, $content1, $content2) {
            return ["type" => 'unchanged', 'key' => $key, 'value' => $content1[$key]];
        }
      ],
      [
        "type" => 'added',
        "check" => function ($key, $content1, $content2) {
            return (!in_array($key, array_keys($content1)) && in_array($key, array_keys($content2)));
        },
        "action" => function ($key, $content1, $content2) {
            return ["type" => 'added', 'key' => $key, 'newValue' => $content2[$key]];
        }
      ],
      [
        "type" => 'removed',
        "check" => function ($key, $content1, $content2) {
            return (in_array($key, array_keys($content1)) && !in_array($key, array_keys($content2)));
        },
        "action" => function ($key, $content1, $content2) {
            return ["type" => 'removed', 'key' => $key, 'oldValue' => $content1[$key]];
        }
      ]
    ];

    $newKeys = array_unique(array_merge(array_keys($content1), array_keys($content2)));
    $result = array_reduce($newKeys, function ($acc, $key) use ($content1, $content2, $nodeTypes) {
        $acc[] = getNode($key, $content1, $content2, $nodeTypes);
        return $acc;
    }, []);

    return $result;
}