Binding logging functions to Object

package.json

@@ -1,6 +1,6 @@
 {
    "name": "@hibas123/logging",
-   "version": "2.1.0",
+   "version": "2.1.1",
    "description": "",
    "main": "out/index.js",
    "types": "out/index.d.ts",

src/base.ts

@@ -34,7 +34,7 @@ export class LoggingBase {
     }
 
 
-    private adapter: Adapter[] = [];
+    private adapter = new Set<Adapter>();
     private adapter_init: Promise<void>[] = [];
 
     private messageObservable = new Observable<Message>();
@@ -64,10 +64,9 @@ export class LoggingBase {
             opt = options;
         }
 
-        let config = {
+        let config: LoggingBaseOptions = {
             name: undefined,
             console: true,
-            files: true,
             ...opt
         };
 
@@ -81,12 +80,24 @@ export class LoggingBase {
         if (config.console) {
             this.addAdapter(new ConsoleAdapter());
         }
+
+
+        //Binding function to this
+        this.debug = this.debug.bind(this);
+        this.log = this.log.bind(this);
+        this.warn = this.warn.bind(this);
+        this.warning = this.warning.bind(this);
+        this.error = this.error.bind(this);
+        this.errorMessage = this.errorMessage.bind(this);
+        this.flush = this.flush.bind(this);
     }
 
     addAdapter(adapter: Adapter) {
-        this.adapter.push(adapter);
+        if (!this.adapter.has(adapter)) {
-        let prms = Promise.resolve(adapter.init(this.messageObservable.getPublicApi(), this._name));
+            this.adapter.add(adapter);
-        this.adapter_init.push(prms);
+            let prms = Promise.resolve(adapter.init(this.messageObservable.getPublicApi(), this._name));
+            this.adapter_init.push(prms);
+        }
     }
 
     flush(sync: true): void;
@@ -95,7 +106,9 @@ export class LoggingBase {
         if (sync) {
             this.adapter.forEach(elm => elm.flush(true));
         } else {
-            return Promise.all(this.adapter.map(elm => elm.flush(false))).then(() => { });
+            let adapters: (void | Promise<void>)[] = [];
+            this.adapter.forEach(elm => adapters.push(elm.flush(false)));
+            return Promise.all(adapters).then(() => { });
         }
     }