Part-DB.Part-DB-server/src/Services/LabelSystem/LabelTextReplacer.php

107 lines
4.1 KiB
PHP

<?php
/*
* This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
*
* Copyright (C) 2019 - 2022 Jan Böhmer (https://github.com/jbtronics)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
declare(strict_types=1);
/**
* This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
*
* Copyright (C) 2019 - 2022 Jan Böhmer (https://github.com/jbtronics)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
namespace App\Services\LabelSystem;
use App\Services\LabelSystem\PlaceholderProviders\PlaceholderProviderInterface;
/**
* This service replaces the Placeholders of the user provided lines with the proper informations.
* It uses the PlaceholderProviders provided by PlaceholderProviderInterface classes.
* @see \App\Tests\Services\LabelSystem\LabelTextReplacerTest
*/
final class LabelTextReplacer
{
public function __construct(private readonly iterable $providers)
{
}
/**
* Determine the replacement for a single placeholder. It is iterated over all Replacement Providers.
* If the given string is not a placeholder or the placeholder is not known, it will be returned unchanged.
*
* @param string $placeholder The placeholder that should be replaced. (e.g. '%%PLACEHOLDER%%')
* @param object $target the object that should be used for the placeholder info source
*
* @return string If the placeholder was valid, the replaced info. Otherwise the passed string.
*/
public function handlePlaceholder(string $placeholder, object $target): string
{
return $this->handlePlaceholderOrReturnNull($placeholder, $target) ?? $placeholder;
}
/**
* Similar to handlePlaceholder, but returns null if the placeholder is not known (instead of the original string)
* @param string $placeholder
* @param object $target
* @return string|null
*/
public function handlePlaceholderOrReturnNull(string $placeholder, object $target): ?string
{
foreach ($this->providers as $provider) {
/** @var PlaceholderProviderInterface $provider */
$ret = $provider->replace($placeholder, $target);
if (null !== $ret) {
return $ret;
}
}
return null;
}
/**
* Replaces all placeholders in the input lines.
*
* @param string $lines The input lines that should be replaced
* @param object $target the object that should be used as source for the information
*
* @return string the Lines with replaced information
*/
public function replace(string $lines, object $target): string
{
$patterns = [
'/(\[\[[A-Z_0-9]+\]\])/' => fn($match): string => $this->handlePlaceholder($match[0], $target),
];
return preg_replace_callback_array($patterns, $lines) ?? throw new \RuntimeException('Could not replace placeholders!');
}
}