fix: clone ATG connector status before altering it
[e-mobility-charging-stations-simulator.git] / src / charging-station / AutomaticTransactionGenerator.ts
index de11a76f5f2efa9dbae1577a4c658d6ae1af2cd7..477a8d9c824f2922cb178631d5156ee840a96878 100644 (file)
-// Partial Copyright Jerome Benoit. 2021. All Rights Reserved.
+// Partial Copyright Jerome Benoit. 2021-2023. All Rights Reserved.
 
-import { AuthorizationStatus, AuthorizeResponse, StartTransactionResponse, StopTransactionReason, StopTransactionResponse } from '../types/ocpp/Transaction';
+import { AsyncResource } from 'node:async_hooks';
 
-import ChargingStation from './ChargingStation';
-import Constants from '../utils/Constants';
-import PerformanceStatistics from '../performance/PerformanceStatistics';
-import Utils from '../utils/Utils';
-import logger from '../utils/Logger';
+import type { ChargingStation } from './ChargingStation';
+import { ChargingStationUtils } from './ChargingStationUtils';
+import { IdTagsCache } from './IdTagsCache';
+import { BaseError } from '../exception';
+import { PerformanceStatistics } from '../performance';
+import {
+  AuthorizationStatus,
+  type AuthorizeRequest,
+  type AuthorizeResponse,
+  ConnectorStatusEnum,
+  RequestCommand,
+  type StartTransactionRequest,
+  type StartTransactionResponse,
+  type Status,
+  StopTransactionReason,
+  type StopTransactionResponse,
+} from '../types';
+import { Constants, Utils, logger } from '../utils';
 
-export default class AutomaticTransactionGenerator {
+const moduleName = 'AutomaticTransactionGenerator';
+
+export class AutomaticTransactionGenerator extends AsyncResource {
+  private static readonly instances: Map<string, AutomaticTransactionGenerator> = new Map<
+    string,
+    AutomaticTransactionGenerator
+  >();
+
+  public readonly connectorsStatus: Map<number, Status>;
   public started: boolean;
-  private startDate!: Date;
-  private lastRunDate!: Date;
-  private stopDate!: Date;
-  private chargingStation: ChargingStation;
+  private readonly chargingStation: ChargingStation;
 
-  constructor(chargingStation: ChargingStation) {
-    this.chargingStation = chargingStation;
+  private constructor(chargingStation: ChargingStation) {
+    super(moduleName);
     this.started = false;
+    this.chargingStation = chargingStation;
+    this.connectorsStatus = new Map<number, Status>();
+    this.initializeConnectorsStatus();
+  }
+
+  public static getInstance(
+    chargingStation: ChargingStation
+  ): AutomaticTransactionGenerator | undefined {
+    if (AutomaticTransactionGenerator.instances.has(chargingStation.stationInfo.hashId) === false) {
+      AutomaticTransactionGenerator.instances.set(
+        chargingStation.stationInfo.hashId,
+        new AutomaticTransactionGenerator(chargingStation)
+      );
+    }
+    return AutomaticTransactionGenerator.instances.get(chargingStation.stationInfo.hashId);
   }
 
   public start(): void {
-    const previousRunDuration = (this?.startDate && this?.lastRunDate) ? (this.lastRunDate.getTime() - this.startDate.getTime()) : 0;
-    this.startDate = new Date();
-    this.lastRunDate = this.startDate;
-    this.stopDate = new Date(this.startDate.getTime()
-      + (this.chargingStation.stationInfo?.AutomaticTransactionGenerator?.stopAfterHours ?? Constants.CHARGING_STATION_ATG_DEFAULT_STOP_AFTER_HOURS) * 3600 * 1000
-      - previousRunDuration);
-    this.started = true;
-    for (const connector in this.chargingStation.connectors) {
-      if (Utils.convertToInt(connector) > 0) {
-        // Avoid hogging the event loop with a busy loop
-        setImmediate(() => {
-          this.startOnConnector(Utils.convertToInt(connector)).catch(() => { /* This is intentional */ });
-        });
-      }
+    if (
+      ChargingStationUtils.checkChargingStation(this.chargingStation, this.logPrefix()) === false
+    ) {
+      return;
+    }
+    if (this.started === true) {
+      logger.warn(`${this.logPrefix()} is already started`);
+      return;
     }
-    logger.info(this.logPrefix() + ' started and will run for ' + Utils.formatDurationMilliSeconds(this.stopDate.getTime() - this.startDate.getTime()));
+    this.startConnectors();
+    this.started = true;
   }
 
   public stop(): void {
-    if (!this.started) {
-      logger.error(`${this.logPrefix()} trying to stop while not started`);
+    if (this.started === false) {
+      logger.warn(`${this.logPrefix()} is already stopped`);
       return;
     }
+    this.stopConnectors();
     this.started = false;
-    logger.info(`${this.logPrefix()} over and lasted for ${Utils.formatDurationMilliSeconds(this.lastRunDate.getTime() - this.startDate.getTime())}. Stopping all transactions`);
   }
 
-  private async startOnConnector(connectorId: number): Promise<void> {
-    logger.info(this.logPrefix(connectorId) + ' started on connector');
-    let skippedTransactions = 0;
-    let skippedTransactionsTotal = 0;
-    while (this.started) {
-      if ((new Date()) > this.stopDate) {
-        this.stop();
+  public startConnector(connectorId: number): void {
+    if (
+      ChargingStationUtils.checkChargingStation(
+        this.chargingStation,
+        this.logPrefix(connectorId)
+      ) === false
+    ) {
+      return;
+    }
+    if (this.connectorsStatus.has(connectorId) === false) {
+      logger.error(`${this.logPrefix(connectorId)} starting on non existing connector`);
+      throw new BaseError(`Connector ${connectorId} does not exist`);
+    }
+    if (this.connectorsStatus.get(connectorId)?.start === false) {
+      this.runInAsyncScope(
+        this.internalStartConnector.bind(this) as (
+          this: AutomaticTransactionGenerator,
+          ...args: any[]
+        ) => Promise<void>,
+        this,
+        connectorId
+      ).catch(Constants.EMPTY_FUNCTION);
+    } else if (this.connectorsStatus.get(connectorId)?.start === true) {
+      logger.warn(`${this.logPrefix(connectorId)} is already started on connector`);
+    }
+  }
+
+  public stopConnector(connectorId: number): void {
+    if (this.connectorsStatus.has(connectorId) === false) {
+      logger.error(`${this.logPrefix(connectorId)} stopping on non existing connector`);
+      throw new BaseError(`Connector ${connectorId} does not exist`);
+    }
+    if (this.connectorsStatus.get(connectorId)?.start === true) {
+      this.connectorsStatus.get(connectorId).start = false;
+    } else if (this.connectorsStatus.get(connectorId)?.start === false) {
+      logger.warn(`${this.logPrefix(connectorId)} is already stopped on connector`);
+    }
+  }
+
+  private startConnectors(): void {
+    if (
+      this.connectorsStatus?.size > 0 &&
+      this.connectorsStatus.size !== this.chargingStation.getNumberOfConnectors()
+    ) {
+      this.connectorsStatus.clear();
+      this.initializeConnectorsStatus();
+    }
+    if (this.chargingStation.hasEvses) {
+      for (const [evseId, evseStatus] of this.chargingStation.evses) {
+        if (evseId > 0) {
+          for (const connectorId of evseStatus.connectors.keys()) {
+            this.startConnector(connectorId);
+          }
+        }
+      }
+    } else {
+      for (const connectorId of this.chargingStation.connectors.keys()) {
+        if (connectorId > 0) {
+          this.startConnector(connectorId);
+        }
+      }
+    }
+  }
+
+  private stopConnectors(): void {
+    if (this.chargingStation.hasEvses) {
+      for (const [evseId, evseStatus] of this.chargingStation.evses) {
+        if (evseId > 0) {
+          for (const connectorId of evseStatus.connectors.keys()) {
+            this.stopConnector(connectorId);
+          }
+        }
+      }
+    } else {
+      for (const connectorId of this.chargingStation.connectors.keys()) {
+        if (connectorId > 0) {
+          this.stopConnector(connectorId);
+        }
+      }
+    }
+  }
+
+  private async internalStartConnector(connectorId: number): Promise<void> {
+    this.setStartConnectorStatus(connectorId);
+    logger.info(
+      `${this.logPrefix(
+        connectorId
+      )} started on connector and will run for ${Utils.formatDurationMilliSeconds(
+        this.connectorsStatus.get(connectorId).stopDate.getTime() -
+          this.connectorsStatus.get(connectorId).startDate.getTime()
+      )}`
+    );
+    while (this.connectorsStatus.get(connectorId)?.start === true) {
+      if (new Date() > this.connectorsStatus.get(connectorId).stopDate) {
+        this.stopConnector(connectorId);
+        break;
+      }
+      if (this.chargingStation.inAcceptedState() === false) {
+        logger.error(
+          `${this.logPrefix(
+            connectorId
+          )} entered in transaction loop while the charging station is not in accepted state`
+        );
+        this.stopConnector(connectorId);
         break;
       }
-      if (!this.chargingStation.isRegistered()) {
-        logger.error(this.logPrefix(connectorId) + ' Entered in transaction loop while the charging station is not registered');
+      if (this.chargingStation.isChargingStationAvailable() === false) {
+        logger.info(
+          `${this.logPrefix(
+            connectorId
+          )} entered in transaction loop while the charging station is unavailable`
+        );
+        this.stopConnector(connectorId);
         break;
       }
-      if (!this.chargingStation.isChargingStationAvailable()) {
-        logger.info(this.logPrefix(connectorId) + ' Entered in transaction loop while the charging station is unavailable');
-        this.stop();
+      if (this.chargingStation.isConnectorAvailable(connectorId) === false) {
+        logger.info(
+          `${this.logPrefix(
+            connectorId
+          )} entered in transaction loop while the connector ${connectorId} is unavailable`
+        );
+        this.stopConnector(connectorId);
         break;
       }
-      if (!this.chargingStation.isConnectorAvailable(connectorId)) {
-        logger.info(`${this.logPrefix(connectorId)} Entered in transaction loop while the connector ${connectorId} is unavailable, stop it`);
+      if (
+        this.chargingStation.getConnectorStatus(connectorId)?.status ===
+        ConnectorStatusEnum.Unavailable
+      ) {
+        logger.info(
+          `${this.logPrefix(
+            connectorId
+          )} entered in transaction loop while the connector ${connectorId} status is unavailable`
+        );
+        this.stopConnector(connectorId);
         break;
       }
       if (!this.chargingStation?.ocppRequestService) {
-        logger.info(`${this.logPrefix(connectorId)} Transaction loop waiting for charging station service to be initialized`);
+        logger.info(
+          `${this.logPrefix(
+            connectorId
+          )} transaction loop waiting for charging station service to be initialized`
+        );
         do {
           await Utils.sleep(Constants.CHARGING_STATION_ATG_INITIALIZATION_TIME);
         } while (!this.chargingStation?.ocppRequestService);
       }
-      const wait = Utils.getRandomInt(this.chargingStation.stationInfo.AutomaticTransactionGenerator.maxDelayBetweenTwoTransactions,
-        this.chargingStation.stationInfo.AutomaticTransactionGenerator.minDelayBetweenTwoTransactions) * 1000;
-      logger.info(this.logPrefix(connectorId) + ' waiting for ' + Utils.formatDurationMilliSeconds(wait));
+      const wait =
+        Utils.getRandomInteger(
+          this.chargingStation.getAutomaticTransactionGeneratorConfiguration()
+            .maxDelayBetweenTwoTransactions,
+          this.chargingStation.getAutomaticTransactionGeneratorConfiguration()
+            .minDelayBetweenTwoTransactions
+        ) * 1000;
+      logger.info(
+        `${this.logPrefix(connectorId)} waiting for ${Utils.formatDurationMilliSeconds(wait)}`
+      );
       await Utils.sleep(wait);
       const start = Utils.secureRandom();
-      if (start < this.chargingStation.stationInfo.AutomaticTransactionGenerator.probabilityOfStart) {
-        skippedTransactions = 0;
+      if (
+        start <
+        this.chargingStation.getAutomaticTransactionGeneratorConfiguration().probabilityOfStart
+      ) {
+        this.connectorsStatus.get(connectorId).skippedConsecutiveTransactions = 0;
         // Start transaction
         const startResponse = await this.startTransaction(connectorId);
-        if (startResponse?.idTagInfo?.status !== AuthorizationStatus.ACCEPTED) {
-          logger.warn(this.logPrefix(connectorId) + ' transaction rejected');
-          await Utils.sleep(Constants.CHARGING_STATION_ATG_WAIT_TIME);
-        } else {
+        if (startResponse?.idTagInfo?.status === AuthorizationStatus.ACCEPTED) {
           // Wait until end of transaction
-          const waitTrxEnd = Utils.getRandomInt(this.chargingStation.stationInfo.AutomaticTransactionGenerator.maxDuration,
-            this.chargingStation.stationInfo.AutomaticTransactionGenerator.minDuration) * 1000;
-          logger.info(this.logPrefix(connectorId) + ' transaction ' + this.chargingStation.getConnector(connectorId).transactionId.toString() + ' will stop in ' + Utils.formatDurationMilliSeconds(waitTrxEnd));
+          const waitTrxEnd =
+            Utils.getRandomInteger(
+              this.chargingStation.getAutomaticTransactionGeneratorConfiguration().maxDuration,
+              this.chargingStation.getAutomaticTransactionGeneratorConfiguration().minDuration
+            ) * 1000;
+          logger.info(
+            `${this.logPrefix(connectorId)} transaction started with id ${this.chargingStation
+              .getConnectorStatus(connectorId)
+              ?.transactionId?.toString()} and will stop in ${Utils.formatDurationMilliSeconds(
+              waitTrxEnd
+            )}`
+          );
           await Utils.sleep(waitTrxEnd);
           // Stop transaction
-          if (this.chargingStation.getConnector(connectorId)?.transactionStarted) {
-            logger.info(this.logPrefix(connectorId) + ' stop transaction ' + this.chargingStation.getConnector(connectorId).transactionId.toString());
-            await this.stopTransaction(connectorId);
-          }
+          logger.info(
+            `${this.logPrefix(connectorId)} stop transaction with id ${this.chargingStation
+              .getConnectorStatus(connectorId)
+              ?.transactionId?.toString()}`
+          );
+          await this.stopTransaction(connectorId);
         }
       } else {
-        skippedTransactions++;
-        skippedTransactionsTotal++;
-        logger.info(this.logPrefix(connectorId) + ' skipped transaction ' + skippedTransactions.toString() + '/' + skippedTransactionsTotal.toString());
+        ++this.connectorsStatus.get(connectorId).skippedConsecutiveTransactions;
+        ++this.connectorsStatus.get(connectorId).skippedTransactions;
+        logger.info(
+          `${this.logPrefix(connectorId)} skipped consecutively ${this.connectorsStatus
+            .get(connectorId)
+            ?.skippedConsecutiveTransactions?.toString()}/${this.connectorsStatus
+            .get(connectorId)
+            ?.skippedTransactions?.toString()} transaction(s)`
+        );
+      }
+      this.connectorsStatus.get(connectorId).lastRunDate = new Date();
+    }
+    this.connectorsStatus.get(connectorId).stoppedDate = new Date();
+    logger.info(
+      `${this.logPrefix(
+        connectorId
+      )} stopped on connector and lasted for ${Utils.formatDurationMilliSeconds(
+        this.connectorsStatus.get(connectorId).stoppedDate.getTime() -
+          this.connectorsStatus.get(connectorId).startDate.getTime()
+      )}`
+    );
+    logger.debug(
+      `${this.logPrefix(connectorId)} connector status: %j`,
+      this.connectorsStatus.get(connectorId)
+    );
+  }
+
+  private setStartConnectorStatus(connectorId: number): void {
+    this.connectorsStatus.get(connectorId).skippedConsecutiveTransactions = 0;
+    const previousRunDuration =
+      this.connectorsStatus.get(connectorId)?.startDate &&
+      this.connectorsStatus.get(connectorId)?.lastRunDate
+        ? this.connectorsStatus.get(connectorId).lastRunDate.getTime() -
+          this.connectorsStatus.get(connectorId).startDate.getTime()
+        : 0;
+    this.connectorsStatus.get(connectorId).startDate = new Date();
+    this.connectorsStatus.get(connectorId).stopDate = new Date(
+      this.connectorsStatus.get(connectorId).startDate.getTime() +
+        this.chargingStation.getAutomaticTransactionGeneratorConfiguration().stopAfterHours *
+          3600 *
+          1000 -
+        previousRunDuration
+    );
+    this.connectorsStatus.get(connectorId).start = true;
+  }
+
+  private initializeConnectorsStatus(): void {
+    if (this.chargingStation.hasEvses) {
+      for (const [evseId, evseStatus] of this.chargingStation.evses) {
+        if (evseId > 0) {
+          for (const connectorId of evseStatus.connectors.keys()) {
+            this.connectorsStatus.set(connectorId, this.getConnectorStatus(connectorId));
+          }
+        }
+      }
+    } else {
+      for (const connectorId of this.chargingStation.connectors.keys()) {
+        if (connectorId > 0) {
+          this.connectorsStatus.set(connectorId, this.getConnectorStatus(connectorId));
+        }
       }
-      this.lastRunDate = new Date();
     }
-    await this.stopTransaction(connectorId);
-    logger.info(this.logPrefix(connectorId) + ' stopped on connector');
   }
 
-  private async startTransaction(connectorId: number): Promise<StartTransactionResponse | AuthorizeResponse> {
+  private getConnectorStatus(connectorId: number): Status {
+    const connectorStatus = Utils.cloneObject(
+      this.chargingStation.getAutomaticTransactionGeneratorStatuses()
+    )[connectorId];
+    delete connectorStatus?.startDate;
+    delete connectorStatus?.lastRunDate;
+    delete connectorStatus?.stopDate;
+    delete connectorStatus?.stoppedDate;
+    return (
+      connectorStatus ?? {
+        start: false,
+        authorizeRequests: 0,
+        acceptedAuthorizeRequests: 0,
+        rejectedAuthorizeRequests: 0,
+        startTransactionRequests: 0,
+        acceptedStartTransactionRequests: 0,
+        rejectedStartTransactionRequests: 0,
+        stopTransactionRequests: 0,
+        acceptedStopTransactionRequests: 0,
+        rejectedStopTransactionRequests: 0,
+        skippedConsecutiveTransactions: 0,
+        skippedTransactions: 0,
+      }
+    );
+  }
+
+  private async startTransaction(
+    connectorId: number
+  ): Promise<StartTransactionResponse | undefined> {
     const measureId = 'StartTransaction with ATG';
     const beginId = PerformanceStatistics.beginMeasure(measureId);
     let startResponse: StartTransactionResponse;
-    if (this.chargingStation.hasAuthorizedTags()) {
-      const tagId = this.chargingStation.getRandomTagId();
-      if (this.chargingStation.getAutomaticTransactionGeneratorRequireAuthorize()) {
-        // Authorize tagId
-        const authorizeResponse = await this.chargingStation.ocppRequestService.sendAuthorize(connectorId, tagId);
+    if (this.chargingStation.hasIdTags()) {
+      const idTag = IdTagsCache.getInstance().getIdTag(
+        this.chargingStation.getAutomaticTransactionGeneratorConfiguration()?.idTagDistribution,
+        this.chargingStation,
+        connectorId
+      );
+      const startTransactionLogMsg = `${this.logPrefix(
+        connectorId
+      )} start transaction with an idTag '${idTag}'`;
+      if (this.getRequireAuthorize()) {
+        this.chargingStation.getConnectorStatus(connectorId).authorizeIdTag = idTag;
+        // Authorize idTag
+        const authorizeResponse: AuthorizeResponse =
+          await this.chargingStation.ocppRequestService.requestHandler<
+            AuthorizeRequest,
+            AuthorizeResponse
+          >(this.chargingStation, RequestCommand.AUTHORIZE, {
+            idTag,
+          });
+        ++this.connectorsStatus.get(connectorId).authorizeRequests;
         if (authorizeResponse?.idTagInfo?.status === AuthorizationStatus.ACCEPTED) {
-          logger.info(this.logPrefix(connectorId) + ' start transaction for tagID ' + tagId);
+          ++this.connectorsStatus.get(connectorId).acceptedAuthorizeRequests;
+          logger.info(startTransactionLogMsg);
           // Start transaction
-          startResponse = await this.chargingStation.ocppRequestService.sendStartTransaction(connectorId, tagId);
+          startResponse = await this.chargingStation.ocppRequestService.requestHandler<
+            StartTransactionRequest,
+            StartTransactionResponse
+          >(this.chargingStation, RequestCommand.START_TRANSACTION, {
+            connectorId,
+            idTag,
+          });
+          this.handleStartTransactionResponse(connectorId, startResponse);
           PerformanceStatistics.endMeasure(measureId, beginId);
           return startResponse;
         }
+        ++this.connectorsStatus.get(connectorId).rejectedAuthorizeRequests;
         PerformanceStatistics.endMeasure(measureId, beginId);
-        return authorizeResponse;
+        return startResponse;
       }
-      logger.info(this.logPrefix(connectorId) + ' start transaction for tagID ' + tagId);
+      logger.info(startTransactionLogMsg);
       // Start transaction
-      startResponse = await this.chargingStation.ocppRequestService.sendStartTransaction(connectorId, tagId);
+      startResponse = await this.chargingStation.ocppRequestService.requestHandler<
+        StartTransactionRequest,
+        StartTransactionResponse
+      >(this.chargingStation, RequestCommand.START_TRANSACTION, {
+        connectorId,
+        idTag,
+      });
+      this.handleStartTransactionResponse(connectorId, startResponse);
       PerformanceStatistics.endMeasure(measureId, beginId);
       return startResponse;
     }
-    logger.info(this.logPrefix(connectorId) + ' start transaction without a tagID');
-    startResponse = await this.chargingStation.ocppRequestService.sendStartTransaction(connectorId);
+    logger.info(`${this.logPrefix(connectorId)} start transaction without an idTag`);
+    startResponse = await this.chargingStation.ocppRequestService.requestHandler<
+      StartTransactionRequest,
+      StartTransactionResponse
+    >(this.chargingStation, RequestCommand.START_TRANSACTION, { connectorId });
+    this.handleStartTransactionResponse(connectorId, startResponse);
     PerformanceStatistics.endMeasure(measureId, beginId);
     return startResponse;
   }
 
-  private async stopTransaction(connectorId: number, reason: StopTransactionReason = StopTransactionReason.NONE): Promise<StopTransactionResponse> {
+  private async stopTransaction(
+    connectorId: number,
+    reason: StopTransactionReason = StopTransactionReason.LOCAL
+  ): Promise<StopTransactionResponse> {
     const measureId = 'StopTransaction with ATG';
     const beginId = PerformanceStatistics.beginMeasure(measureId);
-    const transactionId = this.chargingStation.getConnector(connectorId).transactionId;
     let stopResponse: StopTransactionResponse;
-    if (this.chargingStation.getConnector(connectorId)?.transactionStarted) {
-      stopResponse = await this.chargingStation.ocppRequestService.sendStopTransaction(transactionId,
-        this.chargingStation.getEnergyActiveImportRegisterByTransactionId(transactionId),
-        this.chargingStation.getTransactionIdTag(transactionId),
-        reason);
+    if (this.chargingStation.getConnectorStatus(connectorId)?.transactionStarted === true) {
+      stopResponse = await this.chargingStation.stopTransactionOnConnector(connectorId, reason);
+      ++this.connectorsStatus.get(connectorId).stopTransactionRequests;
+      if (stopResponse?.idTagInfo?.status === AuthorizationStatus.ACCEPTED) {
+        ++this.connectorsStatus.get(connectorId).acceptedStopTransactionRequests;
+      } else {
+        ++this.connectorsStatus.get(connectorId).rejectedStopTransactionRequests;
+      }
     } else {
-      logger.warn(`${this.logPrefix(connectorId)} trying to stop a not started transaction ${transactionId}`);
+      const transactionId = this.chargingStation.getConnectorStatus(connectorId)?.transactionId;
+      logger.warn(
+        `${this.logPrefix(connectorId)} stopping a not started transaction${
+          !Utils.isNullOrUndefined(transactionId) ? ` with id ${transactionId?.toString()}` : ''
+        }`
+      );
     }
     PerformanceStatistics.endMeasure(measureId, beginId);
     return stopResponse;
   }
 
-  private logPrefix(connectorId?: number): string {
-    if (connectorId) {
-      return Utils.logPrefix(' ' + this.chargingStation.stationInfo.chargingStationId + ' | ATG on connector #' + connectorId.toString() + ':');
+  private getRequireAuthorize(): boolean {
+    return (
+      this.chargingStation.getAutomaticTransactionGeneratorConfiguration()?.requireAuthorize ?? true
+    );
+  }
+
+  private logPrefix = (connectorId?: number): string => {
+    return Utils.logPrefix(
+      ` ${this.chargingStation.stationInfo.chargingStationId} | ATG${
+        !Utils.isNullOrUndefined(connectorId) ? ` on connector #${connectorId.toString()}` : ''
+      }:`
+    );
+  };
+
+  private handleStartTransactionResponse(
+    connectorId: number,
+    startResponse: StartTransactionResponse
+  ): void {
+    ++this.connectorsStatus.get(connectorId).startTransactionRequests;
+    if (startResponse?.idTagInfo?.status === AuthorizationStatus.ACCEPTED) {
+      ++this.connectorsStatus.get(connectorId).acceptedStartTransactionRequests;
+    } else {
+      logger.warn(`${this.logPrefix(connectorId)} start transaction rejected`);
+      ++this.connectorsStatus.get(connectorId).rejectedStartTransactionRequests;
     }
-    return Utils.logPrefix(' ' + this.chargingStation.stationInfo.chargingStationId + ' | ATG:');
   }
 }