php: ConfigManager class added, config.json for ConfigManager added (instead of $GLOBALS array in future)

web/documentserver-example/php/helpers/ConfigManager.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace OnlineEditorsExamplePhp\Helpers;
+
+/**
+ * (c) Copyright Ascensio System SIA 2023
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+final class ConfigManager
+{
+    private mixed $config;
+
+    public function __construct()
+    {
+        $this->config = json_decode($this->getConfigurationJson());
+    }
+
+    private function getConfigurationJson(): bool|string
+    {
+        return file_exists("./config.json") ? file_get_contents("./config.json") : false;
+    }
+
+    /**
+     * @param string|null $configName
+     * @return mixed
+     */
+    public function getConfig(string $configName = null): mixed
+    {
+        if ($configName) {
+            return $this->config->$configName ?? "";
+        }
+        return $this->config;
+    }
+}