Introduce ConfigFileTransformer for Config files

src/Core/Config/Util/ConfigFileTransformer.php

@@ -0,0 +1,85 @@
+<?php
+/**
+ * @copyright Copyright (C) 2010-2023, the Friendica project
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * 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 Friendica\Core\Config\Util;
+
+/**
+ * Util to transform back the config array into a string
+ */
+class ConfigFileTransformer
+{
+	public static function encode(array $data): string
+	{
+		$dataString = '<?php' . PHP_EOL . PHP_EOL;
+		$dataString .= 'return [' . PHP_EOL;
+
+		$categories = array_keys($data);
+
+		foreach ($categories as $category) {
+			$dataString .= "\t'$category' => [" . PHP_EOL;
+
+			if (is_array($data[$category])) {
+				$keys = array_keys($data[$category]);
+
+				foreach ($keys as $key) {
+					$dataString .= static::mapConfigValue($key, $data[$category][$key]);
+				}
+			}
+			$dataString .= "\t]," . PHP_EOL;
+		}
+
+		$dataString .= "];" . PHP_EOL;
+
+		return $dataString;
+	}
+
+	protected static function extractArray(array $config, int $level = 0): string
+	{
+		$string = '';
+
+		foreach ($config as $configKey => $configValue) {
+			$string .= static::mapConfigValue($configKey, $configValue, $level);
+		}
+
+		return $string;
+	}
+
+	protected static function mapConfigValue(string $key, $value, $level = 0): string
+	{
+		$string = str_repeat("\t", $level + 2) . "'$key' => ";
+
+		if (is_array($value)) {
+			$string .= "[" . PHP_EOL;
+			$string .= static::extractArray($value, ++$level);
+			$string .= str_repeat("\t", $level + 1) . '],';
+		} elseif (is_bool($value)) {
+			$string .= ($value ? 'true' : 'false') . ",";
+		} elseif (is_numeric($value)) {
+			$string .= $value . ",";
+		} else {
+			$string .= sprintf('\'%s\',', $value);
+		}
+
+		$string .= PHP_EOL;
+
+		return $string;
+	}
+}