src/charging-station/ChargingStationWorkerBroadcastChannel.ts

   1 import { RequestCommand } from '../types/ocpp/Requests';
   2 import {
   3   StartTransactionRequest,
   4   StartTransactionResponse,
   5   StopTransactionReason,
   6   StopTransactionRequest,
   7   StopTransactionResponse,
   8 } from '../types/ocpp/Transaction';
   9 import {
  10   BroadcastChannelProcedureName,
  11   BroadcastChannelRequest,
  12 } from '../types/WorkerBroadcastChannel';
  13 import ChargingStation from './ChargingStation';
  14 import WorkerBroadcastChannel from './WorkerBroadcastChannel';
  15
  16 const moduleName = 'ChargingStationWorkerBroadcastChannel';
  17
  18 type MessageEvent = { data: unknown };
  19
  20 export default class ChargingStationWorkerBroadcastChannel extends WorkerBroadcastChannel {
  21   private readonly chargingStation: ChargingStation;
  22
  23   constructor(chargingStation: ChargingStation) {
  24     super();
  25     this.chargingStation = chargingStation;
  26     this.onmessage = this.requestHandler.bind(this) as (message: MessageEvent) => void;
  27   }
  28
  29   private async requestHandler(messageEvent: MessageEvent): Promise<void> {
  30     const [, command, payload] = messageEvent.data as BroadcastChannelRequest;
  31
  32     if (payload.hashId !== this.chargingStation.hashId) {
  33       return;
  34     }
  35
  36     // TODO: return a response stating the command success or failure
  37     switch (command) {
  38       case BroadcastChannelProcedureName.START_TRANSACTION:
  39         await this.chargingStation.ocppRequestService.requestHandler<
  40           StartTransactionRequest,
  41           StartTransactionResponse
  42         >(this.chargingStation, RequestCommand.START_TRANSACTION, {
  43           connectorId: payload.connectorId,
  44           idTag: payload.idTag,
  45         });
  46         break;
  47       case BroadcastChannelProcedureName.STOP_TRANSACTION:
  48         await this.chargingStation.ocppRequestService.requestHandler<
  49           StopTransactionRequest,
  50           StopTransactionResponse
  51         >(this.chargingStation, RequestCommand.STOP_TRANSACTION, {
  52           transactionId: payload.transactionId,
  53           meterStop: this.chargingStation.getEnergyActiveImportRegisterByTransactionId(
  54             payload.transactionId
  55           ),
  56           idTag: this.chargingStation.getTransactionIdTag(payload.transactionId),
  57           reason: StopTransactionReason.NONE,
  58         });
  59         break;
  60       case BroadcastChannelProcedureName.START_CHARGING_STATION:
  61         this.chargingStation.start();
  62         break;
  63       case BroadcastChannelProcedureName.STOP_CHARGING_STATION:
  64         await this.chargingStation.stop();
  65         break;
  66     }
  67   }
  68 }