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 type { ChargingStation } from '../../../charging-station';
   6 import { OCPPError } from '../../../exception';
   7 import {
   8   ErrorType,
   9   type JsonObject,
  10   type JsonType,
  11   type OCPP20BootNotificationRequest,
  12   type OCPP20HeartbeatRequest,
  13   OCPP20RequestCommand,
  14   type OCPP20StatusNotificationRequest,
  15   OCPPVersion,
  16   type RequestParams,
  17 } from '../../../types';
  18 import { Utils } from '../../../utils';
  19 import {
  20   OCPP20Constants,
  21   OCPP20ServiceUtils,
  22   OCPPRequestService,
  23   type OCPPResponseService,
  24 } from '../internal';
  25
  26 const moduleName = 'OCPP20RequestService';
  27
  28 export class OCPP20RequestService extends OCPPRequestService {
  29   protected jsonSchemas: Map<OCPP20RequestCommand, JSONSchemaType<JsonObject>>;
  30
  31   public constructor(ocppResponseService: OCPPResponseService) {
  32     // if (new.target?.name === moduleName) {
  33     //   throw new TypeError(`Cannot construct ${new.target?.name} instances directly`);
  34     // }
  35     super(OCPPVersion.VERSION_20, ocppResponseService);
  36     this.jsonSchemas = new Map<OCPP20RequestCommand, JSONSchemaType<JsonObject>>([
  37       [
  38         OCPP20RequestCommand.BOOT_NOTIFICATION,
  39         OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20BootNotificationRequest>(
  40           '../../../assets/json-schemas/ocpp/2.0/BootNotificationRequest.json',
  41           moduleName,
  42           'constructor'
  43         ),
  44       ],
  45       [
  46         OCPP20RequestCommand.HEARTBEAT,
  47         OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20HeartbeatRequest>(
  48           '../../../assets/json-schemas/ocpp/2.0/HeartbeatRequest.json',
  49           moduleName,
  50           'constructor'
  51         ),
  52       ],
  53       [
  54         OCPP20RequestCommand.STATUS_NOTIFICATION,
  55         OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20StatusNotificationRequest>(
  56           '../../../assets/json-schemas/ocpp/2.0/StatusNotificationRequest.json',
  57           moduleName,
  58           'constructor'
  59         ),
  60       ],
  61     ]);
  62     this.buildRequestPayload = this.buildRequestPayload.bind(this) as <Request extends JsonType>(
  63       chargingStation: ChargingStation,
  64       commandName: OCPP20RequestCommand,
  65       commandParams?: JsonType
  66     ) => Request;
  67   }
  68
  69   public async requestHandler<RequestType extends JsonType, ResponseType extends JsonType>(
  70     chargingStation: ChargingStation,
  71     commandName: OCPP20RequestCommand,
  72     commandParams?: JsonType,
  73     params?: RequestParams
  74   ): Promise<ResponseType> {
  75     // FIXME?: add sanity checks on charging station availability, connector availability, connector status, etc.
  76     if (OCPP20ServiceUtils.isRequestCommandSupported(chargingStation, commandName) === true) {
  77       return (await this.sendMessage(
  78         chargingStation,
  79         Utils.generateUUID(),
  80         this.buildRequestPayload<RequestType>(chargingStation, commandName, commandParams),
  81         commandName,
  82         params
  83       )) as ResponseType;
  84     }
  85     // OCPPError usage here is debatable: it's an error in the OCPP stack but not targeted to sendError().
  86     throw new OCPPError(
  87       ErrorType.NOT_SUPPORTED,
  88       `Unsupported OCPP command '${commandName}'`,
  89       commandName,
  90       commandParams
  91     );
  92   }
  93
  94   private buildRequestPayload<Request extends JsonType>(
  95     chargingStation: ChargingStation,
  96     commandName: OCPP20RequestCommand,
  97     commandParams?: JsonType
  98   ): Request {
  99     commandParams = commandParams as JsonObject;
 100     switch (commandName) {
 101       case OCPP20RequestCommand.BOOT_NOTIFICATION:
 102         return commandParams as unknown as Request;
 103       case OCPP20RequestCommand.HEARTBEAT:
 104         return OCPP20Constants.OCPP_RESPONSE_EMPTY as unknown as Request;
 105       case OCPP20RequestCommand.STATUS_NOTIFICATION:
 106         return {
 107           timestamp: new Date(),
 108           ...commandParams,
 109         } as unknown as Request;
 110       default:
 111         // OCPPError usage here is debatable: it's an error in the OCPP stack but not targeted to sendError().
 112         throw new OCPPError(
 113           ErrorType.NOT_SUPPORTED,
 114           // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
 115           `Unsupported OCPP command '${commandName}'`,
 116           commandName,
 117           commandParams
 118         );
 119     }
 120   }
 121 }