src/charging-station/ocpp/1.6/OCPP16RequestService.ts

   1 // Partial Copyright Jerome Benoit. 2021-2023. All Rights Reserved.
   2
   3 import fs from 'fs';
   4 import path from 'path';
   5 import { fileURLToPath } from 'url';
   6
   7 import type { JSONSchemaType } from 'ajv';
   8
   9 import OCPPError from '../../../exception/OCPPError';
  10 import type { JsonObject, JsonType } from '../../../types/JsonType';
  11 import type { OCPP16MeterValuesRequest } from '../../../types/ocpp/1.6/MeterValues';
  12 import {
  13   type OCPP16BootNotificationRequest,
  14   type OCPP16DataTransferRequest,
  15   type OCPP16DiagnosticsStatusNotificationRequest,
  16   type OCPP16FirmwareStatusNotificationRequest,
  17   type OCPP16HeartbeatRequest,
  18   OCPP16RequestCommand,
  19   type OCPP16StatusNotificationRequest,
  20 } from '../../../types/ocpp/1.6/Requests';
  21 import type {
  22   OCPP16AuthorizeRequest,
  23   OCPP16StartTransactionRequest,
  24   OCPP16StopTransactionRequest,
  25 } from '../../../types/ocpp/1.6/Transaction';
  26 import { ErrorType } from '../../../types/ocpp/ErrorType';
  27 import { OCPPVersion } from '../../../types/ocpp/OCPPVersion';
  28 import type { RequestParams } from '../../../types/ocpp/Requests';
  29 import Constants from '../../../utils/Constants';
  30 import Utils from '../../../utils/Utils';
  31 import type ChargingStation from '../../ChargingStation';
  32 import OCPPRequestService from '../OCPPRequestService';
  33 import type OCPPResponseService from '../OCPPResponseService';
  34 import { OCPP16ServiceUtils } from './OCPP16ServiceUtils';
  35
  36 const moduleName = 'OCPP16RequestService';
  37
  38 export default class OCPP16RequestService extends OCPPRequestService {
  39   protected jsonSchemas: Map<OCPP16RequestCommand, JSONSchemaType<JsonObject>>;
  40
  41   public constructor(ocppResponseService: OCPPResponseService) {
  42     if (new.target?.name === moduleName) {
  43       throw new TypeError(`Cannot construct ${new.target?.name} instances directly`);
  44     }
  45     super(OCPPVersion.VERSION_16, ocppResponseService);
  46     this.jsonSchemas = new Map<OCPP16RequestCommand, JSONSchemaType<JsonObject>>([
  47       [
  48         OCPP16RequestCommand.AUTHORIZE,
  49         this.parseJsonSchemaFile<OCPP16AuthorizeRequest>(
  50           '../../../assets/json-schemas/ocpp/1.6/Authorize.json'
  51         ),
  52       ],
  53       [
  54         OCPP16RequestCommand.BOOT_NOTIFICATION,
  55         this.parseJsonSchemaFile<OCPP16BootNotificationRequest>(
  56           '../../../assets/json-schemas/ocpp/1.6/BootNotification.json'
  57         ),
  58       ],
  59       [
  60         OCPP16RequestCommand.DIAGNOSTICS_STATUS_NOTIFICATION,
  61         this.parseJsonSchemaFile<OCPP16DiagnosticsStatusNotificationRequest>(
  62           '../../../assets/json-schemas/ocpp/1.6/DiagnosticsStatusNotification.json'
  63         ),
  64       ],
  65       [
  66         OCPP16RequestCommand.HEARTBEAT,
  67         this.parseJsonSchemaFile<OCPP16HeartbeatRequest>(
  68           '../../../assets/json-schemas/ocpp/1.6/Heartbeat.json'
  69         ),
  70       ],
  71       [
  72         OCPP16RequestCommand.METER_VALUES,
  73         this.parseJsonSchemaFile<OCPP16MeterValuesRequest>(
  74           '../../../assets/json-schemas/ocpp/1.6/MeterValues.json'
  75         ),
  76       ],
  77       [
  78         OCPP16RequestCommand.STATUS_NOTIFICATION,
  79         this.parseJsonSchemaFile<OCPP16StatusNotificationRequest>(
  80           '../../../assets/json-schemas/ocpp/1.6/StatusNotification.json'
  81         ),
  82       ],
  83       [
  84         OCPP16RequestCommand.START_TRANSACTION,
  85         this.parseJsonSchemaFile<OCPP16StartTransactionRequest>(
  86           '../../../assets/json-schemas/ocpp/1.6/StartTransaction.json'
  87         ),
  88       ],
  89       [
  90         OCPP16RequestCommand.STOP_TRANSACTION,
  91         this.parseJsonSchemaFile<OCPP16StopTransactionRequest>(
  92           '../../../assets/json-schemas/ocpp/1.6/StopTransaction.json'
  93         ),
  94       ],
  95       [
  96         OCPP16RequestCommand.DATA_TRANSFER,
  97         this.parseJsonSchemaFile<OCPP16DataTransferRequest>(
  98           '../../../assets/json-schemas/ocpp/1.6/DataTransfer.json'
  99         ),
 100       ],
 101       [
 102         OCPP16RequestCommand.FIRMWARE_STATUS_NOTIFICATION,
 103         this.parseJsonSchemaFile<OCPP16FirmwareStatusNotificationRequest>(
 104           '../../../assets/json-schemas/ocpp/1.6/FirmwareStatusNotification.json'
 105         ),
 106       ],
 107     ]);
 108     this.buildRequestPayload.bind(this);
 109   }
 110
 111   public async requestHandler<RequestType extends JsonType, ResponseType extends JsonType>(
 112     chargingStation: ChargingStation,
 113     commandName: OCPP16RequestCommand,
 114     commandParams?: JsonType,
 115     params?: RequestParams
 116   ): Promise<ResponseType> {
 117     if (OCPP16ServiceUtils.isRequestCommandSupported(chargingStation, commandName) === true) {
 118       const requestPayload = this.buildRequestPayload<RequestType>(
 119         chargingStation,
 120         commandName,
 121         commandParams
 122       );
 123       return (await this.sendMessage(
 124         chargingStation,
 125         Utils.generateUUID(),
 126         requestPayload,
 127         commandName,
 128         params
 129       )) as unknown as ResponseType;
 130     }
 131     // OCPPError usage here is debatable: it's an error in the OCPP stack but not targeted to sendError().
 132     throw new OCPPError(
 133       ErrorType.NOT_SUPPORTED,
 134       `Unsupported OCPP command '${commandName}'`,
 135       commandName,
 136       commandParams
 137     );
 138   }
 139
 140   private buildRequestPayload<Request extends JsonType>(
 141     chargingStation: ChargingStation,
 142     commandName: OCPP16RequestCommand,
 143     commandParams?: JsonType
 144   ): Request {
 145     let connectorId: number;
 146     let energyActiveImportRegister: number;
 147     commandParams = commandParams as JsonObject;
 148     switch (commandName) {
 149       case OCPP16RequestCommand.AUTHORIZE:
 150         return {
 151           ...(!Utils.isUndefined(commandParams?.idTag)
 152             ? { idTag: commandParams.idTag }
 153             : { idTag: Constants.DEFAULT_IDTAG }),
 154         } as unknown as Request;
 155       case OCPP16RequestCommand.BOOT_NOTIFICATION:
 156         return {
 157           chargePointModel: commandParams?.chargePointModel,
 158           chargePointVendor: commandParams?.chargePointVendor,
 159           ...(!Utils.isUndefined(commandParams?.chargeBoxSerialNumber) && {
 160             chargeBoxSerialNumber: commandParams.chargeBoxSerialNumber,
 161           }),
 162           ...(!Utils.isUndefined(commandParams?.chargePointSerialNumber) && {
 163             chargePointSerialNumber: commandParams.chargePointSerialNumber,
 164           }),
 165           ...(!Utils.isUndefined(commandParams?.firmwareVersion) && {
 166             firmwareVersion: commandParams.firmwareVersion,
 167           }),
 168           ...(!Utils.isUndefined(commandParams?.iccid) && { iccid: commandParams.iccid }),
 169           ...(!Utils.isUndefined(commandParams?.imsi) && { imsi: commandParams.imsi }),
 170           ...(!Utils.isUndefined(commandParams?.meterSerialNumber) && {
 171             meterSerialNumber: commandParams.meterSerialNumber,
 172           }),
 173           ...(!Utils.isUndefined(commandParams?.meterType) && {
 174             meterType: commandParams.meterType,
 175           }),
 176         } as unknown as Request;
 177       case OCPP16RequestCommand.DIAGNOSTICS_STATUS_NOTIFICATION:
 178       case OCPP16RequestCommand.FIRMWARE_STATUS_NOTIFICATION:
 179         return {
 180           status: commandParams?.status,
 181         } as unknown as Request;
 182       case OCPP16RequestCommand.HEARTBEAT:
 183         return {} as unknown as Request;
 184       case OCPP16RequestCommand.METER_VALUES:
 185         return {
 186           connectorId: commandParams?.connectorId,
 187           transactionId: commandParams?.transactionId,
 188           meterValue: commandParams?.meterValue,
 189         } as unknown as Request;
 190       case OCPP16RequestCommand.STATUS_NOTIFICATION:
 191         return {
 192           connectorId: commandParams?.connectorId,
 193           status: commandParams?.status,
 194           errorCode: commandParams?.errorCode,
 195         } as unknown as Request;
 196       case OCPP16RequestCommand.START_TRANSACTION:
 197         return {
 198           connectorId: commandParams?.connectorId,
 199           ...(!Utils.isUndefined(commandParams?.idTag)
 200             ? { idTag: commandParams?.idTag }
 201             : { idTag: Constants.DEFAULT_IDTAG }),
 202           meterStart: chargingStation.getEnergyActiveImportRegisterByConnectorId(
 203             commandParams?.connectorId as number
 204           ),
 205           timestamp: new Date(),
 206         } as unknown as Request;
 207       case OCPP16RequestCommand.STOP_TRANSACTION:
 208         connectorId = chargingStation.getConnectorIdByTransactionId(
 209           commandParams?.transactionId as number
 210         );
 211         commandParams?.meterStop &&
 212           (energyActiveImportRegister =
 213             chargingStation.getEnergyActiveImportRegisterByTransactionId(
 214               commandParams?.transactionId as number,
 215               true
 216             ));
 217         return {
 218           transactionId: commandParams?.transactionId,
 219           idTag:
 220             commandParams?.idTag ??
 221             chargingStation.getTransactionIdTag(commandParams?.transactionId as number),
 222           meterStop: commandParams?.meterStop ?? energyActiveImportRegister,
 223           timestamp: new Date(),
 224           reason: commandParams?.reason,
 225           ...(chargingStation.getTransactionDataMeterValues() && {
 226             transactionData: OCPP16ServiceUtils.buildTransactionDataMeterValues(
 227               chargingStation.getConnectorStatus(connectorId).transactionBeginMeterValue,
 228               OCPP16ServiceUtils.buildTransactionEndMeterValue(
 229                 chargingStation,
 230                 connectorId,
 231                 (commandParams?.meterStop as number) ?? energyActiveImportRegister
 232               )
 233             ),
 234           }),
 235         } as unknown as Request;
 236       case OCPP16RequestCommand.DATA_TRANSFER:
 237         return commandParams as unknown as Request;
 238       default:
 239         // OCPPError usage here is debatable: it's an error in the OCPP stack but not targeted to sendError().
 240         throw new OCPPError(
 241           ErrorType.NOT_SUPPORTED,
 242           // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
 243           `Unsupported OCPP command '${commandName}'`,
 244           commandName,
 245           commandParams
 246         );
 247     }
 248   }
 249
 250   private parseJsonSchemaFile<T extends JsonType>(relativePath: string): JSONSchemaType<T> {
 251     return JSON.parse(
 252       fs.readFileSync(
 253         path.resolve(path.dirname(fileURLToPath(import.meta.url)), relativePath),
 254         'utf8'
 255       )
 256     ) as JSONSchemaType<T>;
 257   }
 258 }