src/charging-station/ocpp/1.6/OCPP16IncomingRequestService.ts

   1 // Partial Copyright Jerome Benoit. 2021. All Rights Reserved.
   2
   3 import { ChangeAvailabilityRequest, ChangeConfigurationRequest, ClearChargingProfileRequest, GetConfigurationRequest, GetDiagnosticsRequest, MessageTrigger, OCPP16AvailabilityType, OCPP16IncomingRequestCommand, OCPP16RequestCommand, OCPP16TriggerMessageRequest, RemoteStartTransactionRequest, RemoteStopTransactionRequest, ResetRequest, SetChargingProfileRequest, UnlockConnectorRequest } from '../../../types/ocpp/1.6/Requests';
   4 import { ChangeAvailabilityResponse, ChangeConfigurationResponse, ClearChargingProfileResponse, GetConfigurationResponse, GetDiagnosticsResponse, OCPP16TriggerMessageResponse, SetChargingProfileResponse, UnlockConnectorResponse } from '../../../types/ocpp/1.6/Responses';
   5 import { ChargingProfilePurposeType, OCPP16ChargingProfile } from '../../../types/ocpp/1.6/ChargingProfile';
   6 import { Client, FTPResponse } from 'basic-ftp';
   7 import { OCPP16AuthorizationStatus, OCPP16StopTransactionReason } from '../../../types/ocpp/1.6/Transaction';
   8
   9 import type ChargingStation from '../../ChargingStation';
  10 import Constants from '../../../utils/Constants';
  11 import { DefaultResponse } from '../../../types/ocpp/Responses';
  12 import { ErrorType } from '../../../types/ocpp/ErrorType';
  13 import { IncomingRequestHandler } from '../../../types/ocpp/Requests';
  14 import { JsonType } from '../../../types/JsonType';
  15 import { OCPP16ChargePointStatus } from '../../../types/ocpp/1.6/ChargePointStatus';
  16 import { OCPP16DiagnosticsStatus } from '../../../types/ocpp/1.6/DiagnosticsStatus';
  17 import { OCPP16StandardParametersKey } from '../../../types/ocpp/1.6/Configuration';
  18 import { OCPPConfigurationKey } from '../../../types/ocpp/Configuration';
  19 import OCPPError from '../../../exception/OCPPError';
  20 import OCPPIncomingRequestService from '../OCPPIncomingRequestService';
  21 import { URL } from 'url';
  22 import Utils from '../../../utils/Utils';
  23 import fs from 'fs';
  24 import logger from '../../../utils/Logger';
  25 import path from 'path';
  26 import tar from 'tar';
  27
  28 const moduleName = 'OCPP16IncomingRequestService';
  29
  30 export default class OCPP16IncomingRequestService extends OCPPIncomingRequestService {
  31   private incomingRequestHandlers: Map<OCPP16IncomingRequestCommand, IncomingRequestHandler>;
  32
  33   public constructor(chargingStation: ChargingStation) {
  34     if (new.target?.name === moduleName) {
  35       throw new TypeError(`Cannot construct ${new.target?.name} instances directly`);
  36     }
  37     super(chargingStation);
  38     this.incomingRequestHandlers = new Map<OCPP16IncomingRequestCommand, IncomingRequestHandler>([
  39       [OCPP16IncomingRequestCommand.RESET, this.handleRequestReset.bind(this)],
  40       [OCPP16IncomingRequestCommand.CLEAR_CACHE, this.handleRequestClearCache.bind(this)],
  41       [OCPP16IncomingRequestCommand.UNLOCK_CONNECTOR, this.handleRequestUnlockConnector.bind(this)],
  42       [OCPP16IncomingRequestCommand.GET_CONFIGURATION, this.handleRequestGetConfiguration.bind(this)],
  43       [OCPP16IncomingRequestCommand.CHANGE_CONFIGURATION, this.handleRequestChangeConfiguration.bind(this)],
  44       [OCPP16IncomingRequestCommand.SET_CHARGING_PROFILE, this.handleRequestSetChargingProfile.bind(this)],
  45       [OCPP16IncomingRequestCommand.CLEAR_CHARGING_PROFILE, this.handleRequestClearChargingProfile.bind(this)],
  46       [OCPP16IncomingRequestCommand.CHANGE_AVAILABILITY, this.handleRequestChangeAvailability.bind(this)],
  47       [OCPP16IncomingRequestCommand.REMOTE_START_TRANSACTION, this.handleRequestRemoteStartTransaction.bind(this)],
  48       [OCPP16IncomingRequestCommand.REMOTE_STOP_TRANSACTION, this.handleRequestRemoteStopTransaction.bind(this)],
  49       [OCPP16IncomingRequestCommand.GET_DIAGNOSTICS, this.handleRequestGetDiagnostics.bind(this)],
  50       [OCPP16IncomingRequestCommand.TRIGGER_MESSAGE, this.handleRequestTriggerMessage.bind(this)]
  51     ]);
  52   }
  53
  54   public async handleRequest(messageId: string, commandName: OCPP16IncomingRequestCommand, commandPayload: JsonType): Promise<void> {
  55     let result: JsonType;
  56     if (this.chargingStation.getOcppStrictCompliance() && (this.chargingStation.isInPendingState()
  57       && (commandName === OCPP16IncomingRequestCommand.REMOTE_START_TRANSACTION || commandName === OCPP16IncomingRequestCommand.REMOTE_STOP_TRANSACTION))) {
  58       throw new OCPPError(ErrorType.SECURITY_ERROR, `${commandName} cannot be issued to handle request payload ${JSON.stringify(commandPayload, null, 2)} while the charging station is in pending state on the central server`, commandName);
  59     }
  60     if (this.chargingStation.isRegistered() || (!this.chargingStation.getOcppStrictCompliance() && this.chargingStation.isInUnknownState())) {
  61       if (this.incomingRequestHandlers.has(commandName)) {
  62         try {
  63           // Call the method to build the result
  64           result = await this.incomingRequestHandlers.get(commandName)(commandPayload);
  65         } catch (error) {
  66           // Log
  67           logger.error(this.chargingStation.logPrefix() + ' Handle request error: %j', error);
  68           throw error;
  69         }
  70       } else {
  71         // Throw exception
  72         throw new OCPPError(ErrorType.NOT_IMPLEMENTED, `${commandName} is not implemented to handle request payload ${JSON.stringify(commandPayload, null, 2)}`, commandName);
  73       }
  74     } else {
  75       throw new OCPPError(ErrorType.SECURITY_ERROR, `${commandName} cannot be issued to handle request payload ${JSON.stringify(commandPayload, null, 2)} while the charging station is not registered on the central server.`, commandName);
  76     }
  77     // Send the built result
  78     await this.chargingStation.ocppRequestService.sendResult(messageId, result, commandName);
  79   }
  80
  81   // Simulate charging station restart
  82   private handleRequestReset(commandPayload: ResetRequest): DefaultResponse {
  83     // eslint-disable-next-line @typescript-eslint/no-misused-promises
  84     setImmediate(async (): Promise<void> => {
  85       await this.chargingStation.stop(commandPayload.type + 'Reset' as OCPP16StopTransactionReason);
  86       await Utils.sleep(this.chargingStation.stationInfo.resetTime);
  87       this.chargingStation.start();
  88     });
  89     logger.info(`${this.chargingStation.logPrefix()} ${commandPayload.type} reset command received, simulating it. The station will be back online in ${Utils.formatDurationMilliSeconds(this.chargingStation.stationInfo.resetTime)}`);
  90     return Constants.OCPP_RESPONSE_ACCEPTED;
  91   }
  92
  93   private handleRequestClearCache(): DefaultResponse {
  94     return Constants.OCPP_RESPONSE_ACCEPTED;
  95   }
  96
  97   private async handleRequestUnlockConnector(commandPayload: UnlockConnectorRequest): Promise<UnlockConnectorResponse> {
  98     const connectorId = commandPayload.connectorId;
  99     if (connectorId === 0) {
 100       logger.error(this.chargingStation.logPrefix() + ' Trying to unlock connector ' + connectorId.toString());
 101       return Constants.OCPP_RESPONSE_UNLOCK_NOT_SUPPORTED;
 102     }
 103     if (this.chargingStation.getConnectorStatus(connectorId)?.transactionStarted) {
 104       const transactionId = this.chargingStation.getConnectorStatus(connectorId).transactionId;
 105       const stopResponse = await this.chargingStation.ocppRequestService.sendStopTransaction(transactionId,
 106         this.chargingStation.getEnergyActiveImportRegisterByTransactionId(transactionId),
 107         this.chargingStation.getTransactionIdTag(transactionId),
 108         OCPP16StopTransactionReason.UNLOCK_COMMAND);
 109       if (stopResponse.idTagInfo?.status === OCPP16AuthorizationStatus.ACCEPTED) {
 110         return Constants.OCPP_RESPONSE_UNLOCKED;
 111       }
 112       return Constants.OCPP_RESPONSE_UNLOCK_FAILED;
 113     }
 114     await this.chargingStation.ocppRequestService.sendStatusNotification(connectorId, OCPP16ChargePointStatus.AVAILABLE);
 115     this.chargingStation.getConnectorStatus(connectorId).status = OCPP16ChargePointStatus.AVAILABLE;
 116     return Constants.OCPP_RESPONSE_UNLOCKED;
 117   }
 118
 119   private handleRequestGetConfiguration(commandPayload: GetConfigurationRequest): GetConfigurationResponse {
 120     const configurationKey: OCPPConfigurationKey[] = [];
 121     const unknownKey: string[] = [];
 122     if (Utils.isEmptyArray(commandPayload.key)) {
 123       for (const configuration of this.chargingStation.configuration.configurationKey) {
 124         if (Utils.isUndefined(configuration.visible)) {
 125           configuration.visible = true;
 126         }
 127         if (!configuration.visible) {
 128           continue;
 129         }
 130         configurationKey.push({
 131           key: configuration.key,
 132           readonly: configuration.readonly,
 133           value: configuration.value,
 134         });
 135       }
 136     } else {
 137       for (const key of commandPayload.key) {
 138         const keyFound = this.chargingStation.getConfigurationKey(key);
 139         if (keyFound) {
 140           if (Utils.isUndefined(keyFound.visible)) {
 141             keyFound.visible = true;
 142           }
 143           if (!keyFound.visible) {
 144             continue;
 145           }
 146           configurationKey.push({
 147             key: keyFound.key,
 148             readonly: keyFound.readonly,
 149             value: keyFound.value,
 150           });
 151         } else {
 152           unknownKey.push(key);
 153         }
 154       }
 155     }
 156     return {
 157       configurationKey,
 158       unknownKey,
 159     };
 160   }
 161
 162   private handleRequestChangeConfiguration(commandPayload: ChangeConfigurationRequest): ChangeConfigurationResponse {
 163     // JSON request fields type sanity check
 164     if (!Utils.isString(commandPayload.key)) {
 165       logger.error(`${this.chargingStation.logPrefix()} ${OCPP16RequestCommand.CHANGE_CONFIGURATION} request key field is not a string:`, commandPayload);
 166     }
 167     if (!Utils.isString(commandPayload.value)) {
 168       logger.error(`${this.chargingStation.logPrefix()} ${OCPP16RequestCommand.CHANGE_CONFIGURATION} request value field is not a string:`, commandPayload);
 169     }
 170     const keyToChange = this.chargingStation.getConfigurationKey(commandPayload.key, true);
 171     if (!keyToChange) {
 172       return Constants.OCPP_CONFIGURATION_RESPONSE_NOT_SUPPORTED;
 173     } else if (keyToChange && keyToChange.readonly) {
 174       return Constants.OCPP_CONFIGURATION_RESPONSE_REJECTED;
 175     } else if (keyToChange && !keyToChange.readonly) {
 176       const keyIndex = this.chargingStation.configuration.configurationKey.indexOf(keyToChange);
 177       let valueChanged = false;
 178       if (this.chargingStation.configuration.configurationKey[keyIndex].value !== commandPayload.value) {
 179         this.chargingStation.configuration.configurationKey[keyIndex].value = commandPayload.value;
 180         valueChanged = true;
 181       }
 182       let triggerHeartbeatRestart = false;
 183       if (keyToChange.key === OCPP16StandardParametersKey.HeartBeatInterval && valueChanged) {
 184         this.chargingStation.setConfigurationKeyValue(OCPP16StandardParametersKey.HeartbeatInterval, commandPayload.value);
 185         triggerHeartbeatRestart = true;
 186       }
 187       if (keyToChange.key === OCPP16StandardParametersKey.HeartbeatInterval && valueChanged) {
 188         this.chargingStation.setConfigurationKeyValue(OCPP16StandardParametersKey.HeartBeatInterval, commandPayload.value);
 189         triggerHeartbeatRestart = true;
 190       }
 191       if (triggerHeartbeatRestart) {
 192         this.chargingStation.restartHeartbeat();
 193       }
 194       if (keyToChange.key === OCPP16StandardParametersKey.WebSocketPingInterval && valueChanged) {
 195         this.chargingStation.restartWebSocketPing();
 196       }
 197       if (keyToChange.reboot) {
 198         return Constants.OCPP_CONFIGURATION_RESPONSE_REBOOT_REQUIRED;
 199       }
 200       return Constants.OCPP_CONFIGURATION_RESPONSE_ACCEPTED;
 201     }
 202   }
 203
 204   private handleRequestSetChargingProfile(commandPayload: SetChargingProfileRequest): SetChargingProfileResponse {
 205     if (!this.chargingStation.getConnectorStatus(commandPayload.connectorId)) {
 206       logger.error(`${this.chargingStation.logPrefix()} Trying to set charging profile(s) to a non existing connector Id ${commandPayload.connectorId}`);
 207       return Constants.OCPP_SET_CHARGING_PROFILE_RESPONSE_REJECTED;
 208     }
 209     if (commandPayload.csChargingProfiles.chargingProfilePurpose === ChargingProfilePurposeType.CHARGE_POINT_MAX_PROFILE && commandPayload.connectorId !== 0) {
 210       return Constants.OCPP_SET_CHARGING_PROFILE_RESPONSE_REJECTED;
 211     }
 212     if (commandPayload.csChargingProfiles.chargingProfilePurpose === ChargingProfilePurposeType.TX_PROFILE && (commandPayload.connectorId === 0 || !this.chargingStation.getConnectorStatus(commandPayload.connectorId)?.transactionStarted)) {
 213       return Constants.OCPP_SET_CHARGING_PROFILE_RESPONSE_REJECTED;
 214     }
 215     this.chargingStation.setChargingProfile(commandPayload.connectorId, commandPayload.csChargingProfiles);
 216     logger.debug(`${this.chargingStation.logPrefix()} Charging profile(s) set, dump their stack: %j`, this.chargingStation.getConnectorStatus(commandPayload.connectorId).chargingProfiles);
 217     return Constants.OCPP_SET_CHARGING_PROFILE_RESPONSE_ACCEPTED;
 218   }
 219
 220   private handleRequestClearChargingProfile(commandPayload: ClearChargingProfileRequest): ClearChargingProfileResponse {
 221     if (!this.chargingStation.getConnectorStatus(commandPayload.connectorId)) {
 222       logger.error(`${this.chargingStation.logPrefix()} Trying to clear a charging profile(s) to a non existing connector Id ${commandPayload.connectorId}`);
 223       return Constants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_UNKNOWN;
 224     }
 225     if (commandPayload.connectorId && !Utils.isEmptyArray(this.chargingStation.getConnectorStatus(commandPayload.connectorId).chargingProfiles)) {
 226       this.chargingStation.getConnectorStatus(commandPayload.connectorId).chargingProfiles = [];
 227       logger.debug(`${this.chargingStation.logPrefix()} Charging profile(s) cleared, dump their stack: %j`, this.chargingStation.getConnectorStatus(commandPayload.connectorId).chargingProfiles);
 228       return Constants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_ACCEPTED;
 229     }
 230     if (!commandPayload.connectorId) {
 231       let clearedCP = false;
 232       for (const connectorId of this.chargingStation.connectors.keys()) {
 233         if (!Utils.isEmptyArray(this.chargingStation.getConnectorStatus(connectorId).chargingProfiles)) {
 234           this.chargingStation.getConnectorStatus(connectorId).chargingProfiles?.forEach((chargingProfile: OCPP16ChargingProfile, index: number) => {
 235             let clearCurrentCP = false;
 236             if (chargingProfile.chargingProfileId === commandPayload.id) {
 237               clearCurrentCP = true;
 238             }
 239             if (!commandPayload.chargingProfilePurpose && chargingProfile.stackLevel === commandPayload.stackLevel) {
 240               clearCurrentCP = true;
 241             }
 242             if (!chargingProfile.stackLevel && chargingProfile.chargingProfilePurpose === commandPayload.chargingProfilePurpose) {
 243               clearCurrentCP = true;
 244             }
 245             if (chargingProfile.stackLevel === commandPayload.stackLevel && chargingProfile.chargingProfilePurpose === commandPayload.chargingProfilePurpose) {
 246               clearCurrentCP = true;
 247             }
 248             if (clearCurrentCP) {
 249               this.chargingStation.getConnectorStatus(commandPayload.connectorId).chargingProfiles[index] = {} as OCPP16ChargingProfile;
 250               logger.debug(`${this.chargingStation.logPrefix()} Charging profile(s) cleared, dump their stack: %j`, this.chargingStation.getConnectorStatus(commandPayload.connectorId).chargingProfiles);
 251               clearedCP = true;
 252             }
 253           });
 254         }
 255       }
 256       if (clearedCP) {
 257         return Constants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_ACCEPTED;
 258       }
 259     }
 260     return Constants.OCPP_CLEAR_CHARGING_PROFILE_RESPONSE_UNKNOWN;
 261   }
 262
 263   private async handleRequestChangeAvailability(commandPayload: ChangeAvailabilityRequest): Promise<ChangeAvailabilityResponse> {
 264     const connectorId: number = commandPayload.connectorId;
 265     if (!this.chargingStation.getConnectorStatus(connectorId)) {
 266       logger.error(`${this.chargingStation.logPrefix()} Trying to change the availability of a non existing connector Id ${connectorId.toString()}`);
 267       return Constants.OCPP_AVAILABILITY_RESPONSE_REJECTED;
 268     }
 269     const chargePointStatus: OCPP16ChargePointStatus = commandPayload.type === OCPP16AvailabilityType.OPERATIVE
 270       ? OCPP16ChargePointStatus.AVAILABLE
 271       : OCPP16ChargePointStatus.UNAVAILABLE;
 272     if (connectorId === 0) {
 273       let response: ChangeAvailabilityResponse = Constants.OCPP_AVAILABILITY_RESPONSE_ACCEPTED;
 274       for (const id of this.chargingStation.connectors.keys()) {
 275         if (this.chargingStation.getConnectorStatus(id)?.transactionStarted) {
 276           response = Constants.OCPP_AVAILABILITY_RESPONSE_SCHEDULED;
 277         }
 278         this.chargingStation.getConnectorStatus(id).availability = commandPayload.type;
 279         if (response === Constants.OCPP_AVAILABILITY_RESPONSE_ACCEPTED) {
 280           await this.chargingStation.ocppRequestService.sendStatusNotification(id, chargePointStatus);
 281           this.chargingStation.getConnectorStatus(id).status = chargePointStatus;
 282         }
 283       }
 284       return response;
 285     } else if (connectorId > 0 && (this.chargingStation.getConnectorStatus(0).availability === OCPP16AvailabilityType.OPERATIVE || (this.chargingStation.getConnectorStatus(0).availability === OCPP16AvailabilityType.INOPERATIVE && commandPayload.type === OCPP16AvailabilityType.INOPERATIVE))) {
 286       if (this.chargingStation.getConnectorStatus(connectorId)?.transactionStarted) {
 287         this.chargingStation.getConnectorStatus(connectorId).availability = commandPayload.type;
 288         return Constants.OCPP_AVAILABILITY_RESPONSE_SCHEDULED;
 289       }
 290       this.chargingStation.getConnectorStatus(connectorId).availability = commandPayload.type;
 291       await this.chargingStation.ocppRequestService.sendStatusNotification(connectorId, chargePointStatus);
 292       this.chargingStation.getConnectorStatus(connectorId).status = chargePointStatus;
 293       return Constants.OCPP_AVAILABILITY_RESPONSE_ACCEPTED;
 294     }
 295     return Constants.OCPP_AVAILABILITY_RESPONSE_REJECTED;
 296   }
 297
 298   private async handleRequestRemoteStartTransaction(commandPayload: RemoteStartTransactionRequest): Promise<DefaultResponse> {
 299     const transactionConnectorId: number = commandPayload.connectorId;
 300     if (transactionConnectorId) {
 301       await this.chargingStation.ocppRequestService.sendStatusNotification(transactionConnectorId, OCPP16ChargePointStatus.PREPARING);
 302       this.chargingStation.getConnectorStatus(transactionConnectorId).status = OCPP16ChargePointStatus.PREPARING;
 303       if (this.chargingStation.isChargingStationAvailable() && this.chargingStation.isConnectorAvailable(transactionConnectorId)) {
 304         // Check if authorized
 305         if (this.chargingStation.getAuthorizeRemoteTxRequests()) {
 306           let authorized = false;
 307           if (this.chargingStation.getLocalAuthListEnabled() && this.chargingStation.hasAuthorizedTags()
 308             && this.chargingStation.authorizedTags.find((value) => value === commandPayload.idTag)) {
 309             this.chargingStation.getConnectorStatus(transactionConnectorId).localAuthorizeIdTag = commandPayload.idTag;
 310             this.chargingStation.getConnectorStatus(transactionConnectorId).idTagLocalAuthorized = true;
 311             authorized = true;
 312           } else if (this.chargingStation.getMayAuthorizeAtRemoteStart()) {
 313             const authorizeResponse = await this.chargingStation.ocppRequestService.sendAuthorize(transactionConnectorId, commandPayload.idTag);
 314             if (authorizeResponse?.idTagInfo?.status === OCPP16AuthorizationStatus.ACCEPTED) {
 315               authorized = true;
 316             }
 317           } else {
 318             logger.warn(`${this.chargingStation.logPrefix()} The charging station configuration expects authorize at remote start transaction but local authorization or authorize isn't enabled`);
 319           }
 320           if (authorized) {
 321             // Authorization successful, start transaction
 322             if (this.setRemoteStartTransactionChargingProfile(transactionConnectorId, commandPayload.chargingProfile)) {
 323               this.chargingStation.getConnectorStatus(transactionConnectorId).transactionRemoteStarted = true;
 324               if ((await this.chargingStation.ocppRequestService.sendStartTransaction(transactionConnectorId, commandPayload.idTag)).idTagInfo.status === OCPP16AuthorizationStatus.ACCEPTED) {
 325                 logger.debug(this.chargingStation.logPrefix() + ' Transaction remotely STARTED on ' + this.chargingStation.stationInfo.chargingStationId + '#' + transactionConnectorId.toString() + ' for idTag ' + commandPayload.idTag);
 326                 return Constants.OCPP_RESPONSE_ACCEPTED;
 327               }
 328               return this.notifyRemoteStartTransactionRejected(transactionConnectorId, commandPayload.idTag);
 329             }
 330             return this.notifyRemoteStartTransactionRejected(transactionConnectorId, commandPayload.idTag);
 331           }
 332           return this.notifyRemoteStartTransactionRejected(transactionConnectorId, commandPayload.idTag);
 333         }
 334         // No authorization check required, start transaction
 335         if (this.setRemoteStartTransactionChargingProfile(transactionConnectorId, commandPayload.chargingProfile)) {
 336           this.chargingStation.getConnectorStatus(transactionConnectorId).transactionRemoteStarted = true;
 337           if ((await this.chargingStation.ocppRequestService.sendStartTransaction(transactionConnectorId, commandPayload.idTag)).idTagInfo.status === OCPP16AuthorizationStatus.ACCEPTED) {
 338             logger.debug(this.chargingStation.logPrefix() + ' Transaction remotely STARTED on ' + this.chargingStation.stationInfo.chargingStationId + '#' + transactionConnectorId.toString() + ' for idTag ' + commandPayload.idTag);
 339             return Constants.OCPP_RESPONSE_ACCEPTED;
 340           }
 341           return this.notifyRemoteStartTransactionRejected(transactionConnectorId, commandPayload.idTag);
 342         }
 343         return this.notifyRemoteStartTransactionRejected(transactionConnectorId, commandPayload.idTag);
 344       }
 345       return this.notifyRemoteStartTransactionRejected(transactionConnectorId, commandPayload.idTag);
 346     }
 347     return this.notifyRemoteStartTransactionRejected(transactionConnectorId, commandPayload.idTag);
 348   }
 349
 350   private async notifyRemoteStartTransactionRejected(connectorId: number, idTag: string): Promise<DefaultResponse> {
 351     if (this.chargingStation.getConnectorStatus(connectorId).status !== OCPP16ChargePointStatus.AVAILABLE) {
 352       await this.chargingStation.ocppRequestService.sendStatusNotification(connectorId, OCPP16ChargePointStatus.AVAILABLE);
 353       this.chargingStation.getConnectorStatus(connectorId).status = OCPP16ChargePointStatus.AVAILABLE;
 354     }
 355     logger.warn(this.chargingStation.logPrefix() + ' Remote starting transaction REJECTED on connector Id ' + connectorId.toString() + ', idTag ' + idTag + ', availability ' + this.chargingStation.getConnectorStatus(connectorId).availability + ', status ' + this.chargingStation.getConnectorStatus(connectorId).status);
 356     return Constants.OCPP_RESPONSE_REJECTED;
 357   }
 358
 359   private setRemoteStartTransactionChargingProfile(connectorId: number, cp: OCPP16ChargingProfile): boolean {
 360     if (cp && cp.chargingProfilePurpose === ChargingProfilePurposeType.TX_PROFILE) {
 361       this.chargingStation.setChargingProfile(connectorId, cp);
 362       logger.debug(`${this.chargingStation.logPrefix()} Charging profile(s) set at remote start transaction, dump their stack: %j`, this.chargingStation.getConnectorStatus(connectorId).chargingProfiles);
 363       return true;
 364     } else if (cp && cp.chargingProfilePurpose !== ChargingProfilePurposeType.TX_PROFILE) {
 365       logger.warn(`${this.chargingStation.logPrefix()} Not allowed to set ${cp.chargingProfilePurpose} charging profile(s) at remote start transaction`);
 366       return false;
 367     } else if (!cp) {
 368       return true;
 369     }
 370   }
 371
 372   private async handleRequestRemoteStopTransaction(commandPayload: RemoteStopTransactionRequest): Promise<DefaultResponse> {
 373     const transactionId = commandPayload.transactionId;
 374     for (const connectorId of this.chargingStation.connectors.keys()) {
 375       if (connectorId > 0 && this.chargingStation.getConnectorStatus(connectorId)?.transactionId === transactionId) {
 376         await this.chargingStation.ocppRequestService.sendStatusNotification(connectorId, OCPP16ChargePointStatus.FINISHING);
 377         this.chargingStation.getConnectorStatus(connectorId).status = OCPP16ChargePointStatus.FINISHING;
 378         await this.chargingStation.ocppRequestService.sendStopTransaction(transactionId, this.chargingStation.getEnergyActiveImportRegisterByTransactionId(transactionId),
 379           this.chargingStation.getTransactionIdTag(transactionId));
 380         return Constants.OCPP_RESPONSE_ACCEPTED;
 381       }
 382     }
 383     logger.info(this.chargingStation.logPrefix() + ' Trying to remote stop a non existing transaction ' + transactionId.toString());
 384     return Constants.OCPP_RESPONSE_REJECTED;
 385   }
 386
 387   private async handleRequestGetDiagnostics(commandPayload: GetDiagnosticsRequest): Promise<GetDiagnosticsResponse> {
 388     logger.debug(this.chargingStation.logPrefix() + ' ' + OCPP16IncomingRequestCommand.GET_DIAGNOSTICS + ' request received: %j', commandPayload);
 389     const uri = new URL(commandPayload.location);
 390     if (uri.protocol.startsWith('ftp:')) {
 391       let ftpClient: Client;
 392       try {
 393         const logFiles = fs.readdirSync(path.resolve(__dirname, '../../../../')).filter((file) => file.endsWith('.log')).map((file) => path.join('./', file));
 394         const diagnosticsArchive = this.chargingStation.stationInfo.chargingStationId + '_logs.tar.gz';
 395         tar.create({ gzip: true }, logFiles).pipe(fs.createWriteStream(diagnosticsArchive));
 396         ftpClient = new Client();
 397         const accessResponse = await ftpClient.access({
 398           host: uri.host,
 399           ...(uri.port !== '') && { port: Utils.convertToInt(uri.port) },
 400           ...(uri.username !== '') && { user: uri.username },
 401           ...(uri.password !== '') && { password: uri.password },
 402         });
 403         let uploadResponse: FTPResponse;
 404         if (accessResponse.code === 220) {
 405           // eslint-disable-next-line @typescript-eslint/no-misused-promises
 406           ftpClient.trackProgress(async (info) => {
 407             logger.info(`${this.chargingStation.logPrefix()} ${info.bytes / 1024} bytes transferred from diagnostics archive ${info.name}`);
 408             await this.chargingStation.ocppRequestService.sendDiagnosticsStatusNotification(OCPP16DiagnosticsStatus.Uploading);
 409           });
 410           uploadResponse = await ftpClient.uploadFrom(path.join(path.resolve(__dirname, '../../../../'), diagnosticsArchive), uri.pathname + diagnosticsArchive);
 411           if (uploadResponse.code === 226) {
 412             await this.chargingStation.ocppRequestService.sendDiagnosticsStatusNotification(OCPP16DiagnosticsStatus.Uploaded);
 413             if (ftpClient) {
 414               ftpClient.close();
 415             }
 416             return { fileName: diagnosticsArchive };
 417           }
 418           throw new OCPPError(ErrorType.GENERIC_ERROR, `Diagnostics transfer failed with error code ${accessResponse.code.toString()}${uploadResponse?.code && '|' + uploadResponse?.code.toString()}`, OCPP16IncomingRequestCommand.GET_DIAGNOSTICS);
 419         }
 420         throw new OCPPError(ErrorType.GENERIC_ERROR, `Diagnostics transfer failed with error code ${accessResponse.code.toString()}${uploadResponse?.code && '|' + uploadResponse?.code.toString()}`, OCPP16IncomingRequestCommand.GET_DIAGNOSTICS);
 421       } catch (error) {
 422         await this.chargingStation.ocppRequestService.sendDiagnosticsStatusNotification(OCPP16DiagnosticsStatus.UploadFailed);
 423         if (ftpClient) {
 424           ftpClient.close();
 425         }
 426         return this.handleIncomingRequestError(OCPP16IncomingRequestCommand.GET_DIAGNOSTICS, error as Error, { errorResponse: Constants.OCPP_RESPONSE_EMPTY });
 427       }
 428     } else {
 429       logger.error(`${this.chargingStation.logPrefix()} Unsupported protocol ${uri.protocol} to transfer the diagnostic logs archive`);
 430       await this.chargingStation.ocppRequestService.sendDiagnosticsStatusNotification(OCPP16DiagnosticsStatus.UploadFailed);
 431       return Constants.OCPP_RESPONSE_EMPTY;
 432     }
 433   }
 434
 435   private handleRequestTriggerMessage(commandPayload: OCPP16TriggerMessageRequest): OCPP16TriggerMessageResponse {
 436     try {
 437       switch (commandPayload.requestedMessage) {
 438         case MessageTrigger.BootNotification:
 439           setTimeout(() => {
 440             this.chargingStation.ocppRequestService.sendBootNotification(this.chargingStation.getBootNotificationRequest().chargePointModel,
 441               this.chargingStation.getBootNotificationRequest().chargePointVendor, this.chargingStation.getBootNotificationRequest().chargeBoxSerialNumber,
 442               this.chargingStation.getBootNotificationRequest().firmwareVersion, this.chargingStation.getBootNotificationRequest().chargePointSerialNumber,
 443               this.chargingStation.getBootNotificationRequest().iccid, this.chargingStation.getBootNotificationRequest().imsi,
 444               this.chargingStation.getBootNotificationRequest().meterSerialNumber, this.chargingStation.getBootNotificationRequest().meterType,
 445               { triggerMessage: true }).catch(() => { /* This is intentional */ });
 446           }, Constants.OCPP_TRIGGER_MESSAGE_DELAY);
 447           return Constants.OCPP_TRIGGER_MESSAGE_RESPONSE_ACCEPTED;
 448         case MessageTrigger.Heartbeat:
 449           setTimeout(() => {
 450             this.chargingStation.ocppRequestService.sendHeartbeat({ triggerMessage: true }).catch(() => { /* This is intentional */ });
 451           }, Constants.OCPP_TRIGGER_MESSAGE_DELAY);
 452           return Constants.OCPP_TRIGGER_MESSAGE_RESPONSE_ACCEPTED;
 453         default:
 454           return Constants.OCPP_TRIGGER_MESSAGE_RESPONSE_NOT_IMPLEMENTED;
 455       }
 456     } catch (error) {
 457       return this.handleIncomingRequestError(OCPP16IncomingRequestCommand.TRIGGER_MESSAGE, error as Error, { errorResponse: Constants.OCPP_TRIGGER_MESSAGE_RESPONSE_REJECTED });
 458     }
 459   }
 460 }