VariableCompiler.php

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<?php
 
declare(strict_types=1);
 
/*
 * This file is part of the TYPO3 CMS project.
 *
 * It is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License, either version 2
 * of the License, or any later version.
 *
 * For the full copyright and license information, please read the
 * LICENSE.txt file that was distributed with this source code.
 *
 * The TYPO3 project - inspiring people to share!
 */
 
namespace ‪TYPO3\CMS\Frontend\Tests\Functional\SiteHandling\Framework\Builder;
 
class ‪VariableCompiler
{
    public const ‪FLAG_MERGE_OVERRIDE = 1;
    public const ‪FLAG_MERGE_RECURSIVE = 2;
 
    private array ‪$items;
    private ‪Variables ‪$variables;
    private ?int ‪$flags;
    private array ‪$results;
 
    public static function ‪create(array ‪$items, ‪Variables ‪$variables, int ‪$flags = self::FLAG_MERGE_RECURSIVE): self
    {
        return new static(‪$items, ‪$variables, ‪$flags);
    }
 
    public function ‪__construct(array ‪$items, ‪Variables ‪$variables, int ‪$flags = self::FLAG_MERGE_RECURSIVE)
    {
        $this->items = ‪$items;
        $this->variables = ‪$variables;
        $this->flags = ‪$flags;
    }
 
    public function ‪compile(): self
    {
        $this->results = $this->‪compileKeys($this->items);
        $this->results = $this->‪compileValues($this->results);
        return $this;
    }
 
    public function ‪getResults(): array
    {
        return ‪$this->results;
    }
 
    private function ‪compileKeys(array $array): array
    {
        $result = [];
        // applying VariableItems
        foreach ($array as $index => $item) {
            $result = $this->‪assignItems(
                $result,
                $item instanceof ‪VariableItem ? $item->‪apply($this->variables) : [$index => $item]
            );
        }
        // traversing into nested array items (if any)
        foreach ($result as $index => $item) {
            if (is_array($item)) {
                $result[$index] = $this->‪compileKeys($item);
            }
        }
        return $result;
    }
 
    private function ‪assignItems(array $array, array ‪$items): array
    {
        if ($this->flags & self::FLAG_MERGE_OVERRIDE) {
            // keep possible numeric indexes
            return $array + ‪$items;
        }
        return array_replace_recursive($array, ‪$items);
    }
 
    private function ‪compileValues(array $array): array
    {
        foreach ($array as &$item) {
            if (is_array($item)) {
                $item = $this->‪compileValues($item);
            } elseif ($item instanceof ‪Variable) {
                $item = $item->apply($this->variables);
            } elseif ($item instanceof ‪VariableValue) {
                $item = $item->apply($this->variables);
            }
        }
        return $array;
    }
}