LocalConfig => Move for singleton to a generic class for local config files

NodeApp/src/config/LocalConfigFile.ts

 import * as fs from 'fs';
-import SessionManager      from '../managers/SessionManager';
 import Config  from './Config';
-import LocalConfigKeys     from '../types/LocalConfigKeys';
-import GitlabManager       from '../managers/GitlabManager';
 import JSON5   from 'json5';
-import ClientsSharedConfig from '../sharedByClients/config/ClientsSharedConfig';
 
 
 class LocalConfigFile {
-
     constructor(private filename: string) {}
 
     private get configPath(): string {
-        return `${ Config.localConfig.folder }/${ Config.localConfig.file }`;
+        return `${ Config.localConfig.folder }/${ this.filename }`;
     }
 
-    private _config: { [key in LocalConfigKeys]?: any } = {};
+    private _config: { [key: string]: any } = {};
 
     loadConfig() {
         if ( !fs.existsSync(this.configPath) ) {
@@ -26,38 +21,37 @@ class LocalConfigFile {
 
         try {
             this._config = JSON5.parse(fs.readFileSync(this.configPath).toString());
-
-            if ( LocalConfigKeys.API_TOKEN in this._config && ClientsSharedConfig.apiURL in this._config[LocalConfigKeys.API_TOKEN] ) {
-                SessionManager.token = this._config[LocalConfigKeys.API_TOKEN][ClientsSharedConfig.apiURL];
-            }
-
-            GitlabManager.config = this._config[LocalConfigKeys.GITLAB];
         } catch ( error ) {
             console.log(error);
         }
     }
 
-    updateConfig(key: LocalConfigKeys, value: any) {
-        let previousValue = (this._config as any)[key];
-        if ( previousValue === value ) {
-            return;
+    getParam(key: string): any | null {
+        const value = key in this._config ? this._config[key] : null;
+        if ( value === null ) {
+            return null;
+        } else if ( typeof value === 'object' ) {
+            return { ...value };
+        } else {
+            return value;
         }
-
-        if ( key === LocalConfigKeys.API_TOKEN ) {
-            if ( !(LocalConfigKeys.API_TOKEN in this._config) ) {
-                (this._config as any)[LocalConfigKeys.API_TOKEN] = {};
     }
 
-            (this._config as any)[LocalConfigKeys.API_TOKEN][ClientsSharedConfig.apiURL] = value;
-        } else {
-            (this._config as any)[key] = value;
+    setParam(key: string, value: any): void {
+        let previousValue = this.getParam(key);
+        if ( JSON5.stringify(previousValue) === JSON5.stringify(value) ) {
+            return;
         }
 
+        this._config[key] = value;
+
         try {
             fs.writeFileSync(this.configPath, JSON5.stringify(this._config, null, 4));
-        } catch ( error ) { }
+        } catch ( error ) {
+            console.log(error);
+        }
     }
 }
 
 
-export default new LocalConfig();
\ No newline at end of file
+export default LocalConfigFile;
\ No newline at end of file