refactor(simulator): switch utils to internal module export/import

[e-mobility-charging-stations-simulator.git] / src / charging-station / ocpp / 2.0 / OCPP20RequestService.ts

// Partial Copyright Jerome Benoit. 2021-2023. All Rights Reserved.

import type { JSONSchemaType } from 'ajv';

import type { ChargingStation } from '../../../charging-station';
import { OCPPError } from '../../../exception';
import {
  ErrorType,
  type JsonObject,
  type JsonType,
  type OCPP20BootNotificationRequest,
  type OCPP20HeartbeatRequest,
  OCPP20RequestCommand,
  type OCPP20StatusNotificationRequest,
  OCPPVersion,
  type RequestParams,
} from '../../../types';
import { Utils } from '../../../utils';
import {
  OCPP20ServiceUtils,
  OCPPConstants,
  OCPPRequestService,
  type OCPPResponseService,
} from '../internal';

const moduleName = 'OCPP20RequestService';

export class OCPP20RequestService extends OCPPRequestService {
  protected jsonSchemas: Map<OCPP20RequestCommand, JSONSchemaType<JsonObject>>;

  public constructor(ocppResponseService: OCPPResponseService) {
    if (new.target?.name === moduleName) {
      throw new TypeError(`Cannot construct ${new.target?.name} instances directly`);
    }
    super(OCPPVersion.VERSION_20, ocppResponseService);
    this.jsonSchemas = new Map<OCPP20RequestCommand, JSONSchemaType<JsonObject>>([
      [
        OCPP20RequestCommand.BOOT_NOTIFICATION,
        OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20BootNotificationRequest>(
          '../../../assets/json-schemas/ocpp/2.0/BootNotificationRequest.json',
          moduleName,
          'constructor'
        ),
      ],
      [
        OCPP20RequestCommand.HEARTBEAT,
        OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20HeartbeatRequest>(
          '../../../assets/json-schemas/ocpp/2.0/HeartbeatRequest.json',
          moduleName,
          'constructor'
        ),
      ],
      [
        OCPP20RequestCommand.STATUS_NOTIFICATION,
        OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20StatusNotificationRequest>(
          '../../../assets/json-schemas/ocpp/2.0/StatusNotificationRequest.json',
          moduleName,
          'constructor'
        ),
      ],
    ]);
    this.buildRequestPayload.bind(this);
  }

  public async requestHandler<RequestType extends JsonType, ResponseType extends JsonType>(
    chargingStation: ChargingStation,
    commandName: OCPP20RequestCommand,
    commandParams?: JsonType,
    params?: RequestParams
  ): Promise<ResponseType> {
    if (OCPP20ServiceUtils.isRequestCommandSupported(chargingStation, commandName) === true) {
      return (await this.sendMessage(
        chargingStation,
        Utils.generateUUID(),
        this.buildRequestPayload<RequestType>(chargingStation, commandName, commandParams),
        commandName,
        params
      )) as unknown as ResponseType;
    }
    // OCPPError usage here is debatable: it's an error in the OCPP stack but not targeted to sendError().
    throw new OCPPError(
      ErrorType.NOT_SUPPORTED,
      `Unsupported OCPP command '${commandName}'`,
      commandName,
      commandParams
    );
  }

  private buildRequestPayload<Request extends JsonType>(
    chargingStation: ChargingStation,
    commandName: OCPP20RequestCommand,
    commandParams?: JsonType
  ): Request {
    commandParams = commandParams as JsonObject;
    switch (commandName) {
      case OCPP20RequestCommand.BOOT_NOTIFICATION:
        return commandParams as unknown as Request;
      case OCPP20RequestCommand.HEARTBEAT:
        return OCPPConstants.OCPP_RESPONSE_EMPTY as unknown as Request;
      case OCPP20RequestCommand.STATUS_NOTIFICATION:
        return {
          timestamp: new Date(),
          ...commandParams,
        } as unknown as Request;
      default:
        // OCPPError usage here is debatable: it's an error in the OCPP stack but not targeted to sendError().
        throw new OCPPError(
          ErrorType.NOT_SUPPORTED,
          // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
          `Unsupported OCPP command '${commandName}'`,
          commandName,
          commandParams
        );
    }
  }
}