src/charging-station/ocpp/2.0/OCPP20RequestService.ts

   1 // Partial Copyright Jerome Benoit. 2021-2023. All Rights Reserved.
   2
   3 import type { JSONSchemaType } from 'ajv';
   4
   5 import { OCPP20Constants } from './OCPP20Constants';
   6 import { OCPP20ServiceUtils } from './OCPP20ServiceUtils';
   7 import type { ChargingStation } from '../../../charging-station';
   8 import { OCPPError } from '../../../exception';
   9 import {
  10   ErrorType,
  11   type JsonObject,
  12   type JsonType,
  13   type OCPP20BootNotificationRequest,
  14   type OCPP20HeartbeatRequest,
  15   OCPP20RequestCommand,
  16   type OCPP20StatusNotificationRequest,
  17   OCPPVersion,
  18   type RequestParams,
  19 } from '../../../types';
  20 import { generateUUID } from '../../../utils';
  21 import { OCPPRequestService } from '../OCPPRequestService';
  22 import type { OCPPResponseService } from '../OCPPResponseService';
  23
  24 const moduleName = 'OCPP20RequestService';
  25
  26 export class OCPP20RequestService extends OCPPRequestService {
  27   protected jsonSchemas: Map<OCPP20RequestCommand, JSONSchemaType<JsonType>>;
  28
  29   public constructor(ocppResponseService: OCPPResponseService) {
  30     // if (new.target?.name === moduleName) {
  31     //   throw new TypeError(`Cannot construct ${new.target?.name} instances directly`);
  32     // }
  33     super(OCPPVersion.VERSION_20, ocppResponseService);
  34     this.jsonSchemas = new Map<OCPP20RequestCommand, JSONSchemaType<JsonType>>([
  35       [
  36         OCPP20RequestCommand.BOOT_NOTIFICATION,
  37         OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20BootNotificationRequest>(
  38           'assets/json-schemas/ocpp/2.0/BootNotificationRequest.json',
  39           moduleName,
  40           'constructor',
  41         ),
  42       ],
  43       [
  44         OCPP20RequestCommand.HEARTBEAT,
  45         OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20HeartbeatRequest>(
  46           'assets/json-schemas/ocpp/2.0/HeartbeatRequest.json',
  47           moduleName,
  48           'constructor',
  49         ),
  50       ],
  51       [
  52         OCPP20RequestCommand.STATUS_NOTIFICATION,
  53         OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20StatusNotificationRequest>(
  54           'assets/json-schemas/ocpp/2.0/StatusNotificationRequest.json',
  55           moduleName,
  56           'constructor',
  57         ),
  58       ],
  59     ]);
  60     this.buildRequestPayload = this.buildRequestPayload.bind(this) as <Request extends JsonType>(
  61       chargingStation: ChargingStation,
  62       commandName: OCPP20RequestCommand,
  63       commandParams?: JsonType,
  64     ) => Request;
  65   }
  66
  67   public async requestHandler<RequestType extends JsonType, ResponseType extends JsonType>(
  68     chargingStation: ChargingStation,
  69     commandName: OCPP20RequestCommand,
  70     commandParams?: JsonType,
  71     params?: RequestParams,
  72   ): Promise<ResponseType> {
  73     // FIXME?: add sanity checks on charging station availability, connector availability, connector status, etc.
  74     if (OCPP20ServiceUtils.isRequestCommandSupported(chargingStation, commandName) === true) {
  75       return (await this.sendMessage(
  76         chargingStation,
  77         generateUUID(),
  78         this.buildRequestPayload<RequestType>(chargingStation, commandName, commandParams),
  79         commandName,
  80         params,
  81       )) as ResponseType;
  82     }
  83     // OCPPError usage here is debatable: it's an error in the OCPP stack but not targeted to sendError().
  84     throw new OCPPError(
  85       ErrorType.NOT_SUPPORTED,
  86       `Unsupported OCPP command '${commandName}'`,
  87       commandName,
  88       commandParams,
  89     );
  90   }
  91
  92   private buildRequestPayload<Request extends JsonType>(
  93     chargingStation: ChargingStation,
  94     commandName: OCPP20RequestCommand,
  95     commandParams?: JsonType,
  96   ): Request {
  97     commandParams = commandParams as JsonObject;
  98     switch (commandName) {
  99       case OCPP20RequestCommand.BOOT_NOTIFICATION:
 100         return commandParams as unknown as Request;
 101       case OCPP20RequestCommand.HEARTBEAT:
 102         return OCPP20Constants.OCPP_RESPONSE_EMPTY as unknown as Request;
 103       case OCPP20RequestCommand.STATUS_NOTIFICATION:
 104         return {
 105           timestamp: new Date(),
 106           ...commandParams,
 107         } as unknown as Request;
 108       default:
 109         // OCPPError usage here is debatable: it's an error in the OCPP stack but not targeted to sendError().
 110         throw new OCPPError(
 111           ErrorType.NOT_SUPPORTED,
 112           // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
 113           `Unsupported OCPP command '${commandName}'`,
 114           commandName,
 115           commandParams,
 116         );
 117     }
 118   }
 119 }