refactor: revert internal exports

[e-mobility-charging-stations-simulator.git] / src / charging-station / ui-server / AbstractUIServer.ts

diff --git a/src/charging-station/ui-server/AbstractUIServer.ts b/src/charging-station/ui-server/AbstractUIServer.ts
index 91c69a76765b835447988ba46e106ed87829caf2..f2429ae1746b739f3429963686ef3059bfd2f453 100644 (file)
--- a/src/charging-station/ui-server/AbstractUIServer.ts
+++ b/src/charging-station/ui-server/AbstractUIServer.ts
@@ -1,25 +1,31 @@
-import type { Server as HttpServer } from 'http';
+import { type IncomingMessage, Server, type ServerResponse } from 'node:http';
 
-import type WebSocket from 'ws';
+import type { WebSocket } from 'ws';
 
-import type { ChargingStationData } from '../../types/ChargingStationWorker';
-import type {
-  ProcedureName,
-  ProtocolRequest,
-  ProtocolResponse,
-  ProtocolVersion,
-  RequestPayload,
-  ResponsePayload,
-} from '../../types/UIProtocol';
-import type AbstractUIService from './ui-services/AbstractUIService';
+import type { AbstractUIService } from './ui-services/AbstractUIService';
+import { UIServiceFactory } from './ui-services/UIServiceFactory';
+import {
+  AuthenticationType,
+  type ChargingStationData,
+  type ProcedureName,
+  type ProtocolRequest,
+  type ProtocolResponse,
+  type ProtocolVersion,
+  type RequestPayload,
+  type ResponsePayload,
+  type UIServerConfiguration,
+} from '../../types';
 
 export abstract class AbstractUIServer {
   public readonly chargingStations: Map<string, ChargingStationData>;
+  protected readonly httpServer: Server;
+  protected readonly responseHandlers: Map<string, ServerResponse | WebSocket>;
   protected readonly uiServices: Map<ProtocolVersion, AbstractUIService>;
-  protected server: WebSocket.Server | HttpServer;
 
-  public constructor() {
+  public constructor(protected readonly uiServerConfiguration: UIServerConfiguration) {
     this.chargingStations = new Map<string, ChargingStationData>();
+    this.httpServer = new Server();
+    this.responseHandlers = new Map<string, ServerResponse | WebSocket>();
     this.uiServices = new Map<ProtocolVersion, AbstractUIService>();
   }
 
@@ -27,17 +33,66 @@ export abstract class AbstractUIServer {
     id: string,
     procedureName: ProcedureName,
     requestPayload: RequestPayload
-  ): string {
-    return JSON.stringify([id, procedureName, requestPayload] as ProtocolRequest);
+  ): ProtocolRequest {
+    return [id, procedureName, requestPayload];
   }
 
-  public buildProtocolResponse(id: string, responsePayload: ResponsePayload): string {
-    return JSON.stringify([id, responsePayload] as ProtocolResponse);
+  public buildProtocolResponse(id: string, responsePayload: ResponsePayload): ProtocolResponse {
+    return [id, responsePayload];
+  }
+
+  public stop(): void {
+    this.chargingStations.clear();
+  }
+
+  protected startHttpServer(): void {
+    if (this.httpServer.listening === false) {
+      this.httpServer.listen(this.uiServerConfiguration.options);
+    }
+  }
+
+  protected registerProtocolVersionUIService(version: ProtocolVersion): void {
+    if (this.uiServices.has(version) === false) {
+      this.uiServices.set(version, UIServiceFactory.getUIServiceImplementation(version, this));
+    }
+  }
+
+  protected authenticate(req: IncomingMessage, next: (err?: Error) => void): void {
+    if (this.isBasicAuthEnabled() === true) {
+      if (this.isValidBasicAuth(req) === false) {
+        next(new Error('Unauthorized'));
+      }
+      next();
+    }
+    next();
+  }
+
+  private isBasicAuthEnabled(): boolean {
+    return (
+      this.uiServerConfiguration.authentication?.enabled === true &&
+      this.uiServerConfiguration.authentication?.type === AuthenticationType.BASIC_AUTH
+    );
+  }
+
+  private isValidBasicAuth(req: IncomingMessage): boolean {
+    const authorizationHeader = req.headers.authorization ?? '';
+    const authorizationToken = authorizationHeader.split(/\s+/).pop() ?? '';
+    const authentication = Buffer.from(authorizationToken, 'base64').toString();
+    const authenticationParts = authentication.split(/:/);
+    const username = authenticationParts.shift();
+    const password = authenticationParts.join(':');
+    return (
+      this.uiServerConfiguration.authentication?.username === username &&
+      this.uiServerConfiguration.authentication?.password === password
+    );
   }
 
   public abstract start(): void;
-  public abstract stop(): void;
-  public abstract sendRequest(request: string): void;
-  public abstract sendResponse(response: string): void;
-  public abstract logPrefix(modName?: string, methodName?: string, prefixSuffix?: string): string;
+  public abstract sendRequest(request: ProtocolRequest): void;
+  public abstract sendResponse(response: ProtocolResponse): void;
+  public abstract logPrefix(
+    moduleName?: string,
+    methodName?: string,
+    prefixSuffix?: string
+  ): string;
 }