Ensure 1:1 mapping between charging station instance and its OCPP services

[e-mobility-charging-stations-simulator.git] / src / charging-station / ocpp / OCPPResponseService.ts

diff --git a/src/charging-station/ocpp/OCPPResponseService.ts b/src/charging-station/ocpp/OCPPResponseService.ts
index 17bf80650c1e04e615e7b7ddc017f31d43822dc8..c0dd3f767ea14ff8546195556c48daf3aec3dc0c 100644 (file)
--- a/src/charging-station/ocpp/OCPPResponseService.ts
+++ b/src/charging-station/ocpp/OCPPResponseService.ts
@@ -1,13 +1,21 @@
-import ChargingStation from '../ChargingStation';
+import type ChargingStation from '../ChargingStation';
 import { JsonType } from '../../types/JsonType';
 import { RequestCommand } from '../../types/ocpp/Requests';
 
 export default abstract class OCPPResponseService {
-  protected chargingStation: ChargingStation;
+  private static readonly instances: Map<string, OCPPResponseService> = new Map<string, OCPPResponseService>();
+  protected readonly chargingStation: ChargingStation;
 
-  constructor(chargingStation: ChargingStation) {
+  protected constructor(chargingStation: ChargingStation) {
     this.chargingStation = chargingStation;
   }
 
+  public static getInstance<T extends OCPPResponseService>(this: new (chargingStation: ChargingStation) => T, chargingStation: ChargingStation): T {
+    if (!OCPPResponseService.instances.has(chargingStation.id)) {
+      OCPPResponseService.instances.set(chargingStation.id, new this(chargingStation));
+    }
+    return OCPPResponseService.instances.get(chargingStation.id) as T;
+  }
+
   public abstract handleResponse(commandName: RequestCommand, payload: JsonType | string, requestPayload: JsonType): Promise<void>;
 }