refactor: cleanup RFID tags authorization code

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

import { readFileSync } from 'node:fs';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';

import type { DefinedError, ErrorObject, JSONSchemaType } from 'ajv';
import { isDate } from 'date-fns';

import { OCPP16Constants } from './1.6/OCPP16Constants';
import { OCPP20Constants } from './2.0/OCPP20Constants';
import { OCPPConstants } from './OCPPConstants';
import { type ChargingStation, getConfigurationKey, getIdTagsFile } from '../../charging-station';
import { BaseError } from '../../exception';
import {
  AuthorizationStatus,
  type AuthorizeRequest,
  type AuthorizeResponse,
  ChargePointErrorCode,
  type ConnectorStatus,
  type ConnectorStatusEnum,
  ErrorType,
  FileType,
  IncomingRequestCommand,
  type JsonType,
  MessageTrigger,
  MessageType,
  MeterValueMeasurand,
  type MeterValuePhase,
  type OCPP16StatusNotificationRequest,
  type OCPP20StatusNotificationRequest,
  OCPPVersion,
  RequestCommand,
  type SampledValueTemplate,
  StandardParametersKey,
  type StatusNotificationRequest,
  type StatusNotificationResponse,
} from '../../types';
import {
  handleFileException,
  isNotEmptyArray,
  isNotEmptyString,
  logPrefix,
  logger,
} from '../../utils';

export class OCPPServiceUtils {
  protected constructor() {
    // This is intentional
  }

  public static ajvErrorsToErrorType(errors: ErrorObject[]): ErrorType {
    for (const error of errors as DefinedError[]) {
      switch (error.keyword) {
        case 'type':
          return ErrorType.TYPE_CONSTRAINT_VIOLATION;
        case 'dependencies':
        case 'required':
          return ErrorType.OCCURRENCE_CONSTRAINT_VIOLATION;
        case 'pattern':
        case 'format':
          return ErrorType.PROPERTY_CONSTRAINT_VIOLATION;
      }
    }
    return ErrorType.FORMAT_VIOLATION;
  }

  public static getMessageTypeString(messageType: MessageType): string {
    switch (messageType) {
      case MessageType.CALL_MESSAGE:
        return 'request';
      case MessageType.CALL_RESULT_MESSAGE:
        return 'response';
      case MessageType.CALL_ERROR_MESSAGE:
        return 'error';
      default:
        return 'unknown';
    }
  }

  public static isRequestCommandSupported(
    chargingStation: ChargingStation,
    command: RequestCommand,
  ): boolean {
    const isRequestCommand = Object.values<RequestCommand>(RequestCommand).includes(command);
    if (
      isRequestCommand === true &&
      !chargingStation.stationInfo?.commandsSupport?.outgoingCommands
    ) {
      return true;
    } else if (
      isRequestCommand === true &&
      chargingStation.stationInfo?.commandsSupport?.outgoingCommands
    ) {
      return chargingStation.stationInfo?.commandsSupport?.outgoingCommands[command] ?? false;
    }
    logger.error(`${chargingStation.logPrefix()} Unknown outgoing OCPP command '${command}'`);
    return false;
  }

  public static isIncomingRequestCommandSupported(
    chargingStation: ChargingStation,
    command: IncomingRequestCommand,
  ): boolean {
    const isIncomingRequestCommand =
      Object.values<IncomingRequestCommand>(IncomingRequestCommand).includes(command);
    if (
      isIncomingRequestCommand === true &&
      !chargingStation.stationInfo?.commandsSupport?.incomingCommands
    ) {
      return true;
    } else if (
      isIncomingRequestCommand === true &&
      chargingStation.stationInfo?.commandsSupport?.incomingCommands
    ) {
      return chargingStation.stationInfo?.commandsSupport?.incomingCommands[command] ?? false;
    }
    logger.error(`${chargingStation.logPrefix()} Unknown incoming OCPP command '${command}'`);
    return false;
  }

  public static isMessageTriggerSupported(
    chargingStation: ChargingStation,
    messageTrigger: MessageTrigger,
  ): boolean {
    const isMessageTrigger = Object.values(MessageTrigger).includes(messageTrigger);
    if (isMessageTrigger === true && !chargingStation.stationInfo?.messageTriggerSupport) {
      return true;
    } else if (isMessageTrigger === true && chargingStation.stationInfo?.messageTriggerSupport) {
      return chargingStation.stationInfo?.messageTriggerSupport[messageTrigger] ?? false;
    }
    logger.error(
      `${chargingStation.logPrefix()} Unknown incoming OCPP message trigger '${messageTrigger}'`,
    );
    return false;
  }

  public static isConnectorIdValid(
    chargingStation: ChargingStation,
    ocppCommand: IncomingRequestCommand,
    connectorId: number,
  ): boolean {
    if (connectorId < 0) {
      logger.error(
        `${chargingStation.logPrefix()} ${ocppCommand} incoming request received with invalid connector id ${connectorId}`,
      );
      return false;
    }
    return true;
  }

  public static convertDateToISOString<T extends JsonType>(obj: T): void {
    for (const key in obj) {
      // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
      if (isDate(obj![key])) {
        // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
        (obj![key] as string) = (obj![key] as Date).toISOString();
        // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
      } else if (obj![key] !== null && typeof obj![key] === 'object') {
        // eslint-disable-next-line @typescript-eslint/no-unnecessary-type-assertion
        OCPPServiceUtils.convertDateToISOString<T>(obj![key] as T);
      }
    }
  }

  public static buildStatusNotificationRequest(
    chargingStation: ChargingStation,
    connectorId: number,
    status: ConnectorStatusEnum,
    evseId?: number,
  ): StatusNotificationRequest {
    switch (chargingStation.stationInfo.ocppVersion ?? OCPPVersion.VERSION_16) {
      case OCPPVersion.VERSION_16:
        return {
          connectorId,
          status,
          errorCode: ChargePointErrorCode.NO_ERROR,
        } as OCPP16StatusNotificationRequest;
      case OCPPVersion.VERSION_20:
      case OCPPVersion.VERSION_201:
        return {
          timestamp: new Date(),
          connectorStatus: status,
          connectorId,
          evseId,
        } as OCPP20StatusNotificationRequest;
      default:
        throw new BaseError('Cannot build status notification payload: OCPP version not supported');
    }
  }

  public static startHeartbeatInterval(chargingStation: ChargingStation, interval: number): void {
    if (!chargingStation.heartbeatSetInterval) {
      chargingStation.startHeartbeat();
    } else if (chargingStation.getHeartbeatInterval() !== interval) {
      chargingStation.restartHeartbeat();
    }
  }

  public static async sendAndSetConnectorStatus(
    chargingStation: ChargingStation,
    connectorId: number,
    status: ConnectorStatusEnum,
    evseId?: number,
    options?: { send: boolean },
  ) {
    options = { send: true, ...options };
    if (options.send) {
      OCPPServiceUtils.checkConnectorStatusTransition(chargingStation, connectorId, status);
      await chargingStation.ocppRequestService.requestHandler<
        StatusNotificationRequest,
        StatusNotificationResponse
      >(
        chargingStation,
        RequestCommand.STATUS_NOTIFICATION,
        OCPPServiceUtils.buildStatusNotificationRequest(
          chargingStation,
          connectorId,
          status,
          evseId,
        ),
      );
    }
    chargingStation.getConnectorStatus(connectorId)!.status = status;
  }

  public static async isIdTagAuthorized(
    chargingStation: ChargingStation,
    connectorId: number,
    idTag: string,
  ): Promise<boolean> {
    if (!chargingStation.getLocalAuthListEnabled() && !chargingStation.getRemoteAuthorization()) {
      logger.warn(
        `${chargingStation.logPrefix()} The charging station expects to authorize RFID tags but nor local authorization nor remote authorization are enabled. Misbehavior may occur`,
      );
    }
    let authorized = false;
    if (
      chargingStation.getLocalAuthListEnabled() === true &&
      OCPPServiceUtils.isIdTagLocalAuthorized(chargingStation, idTag)
    ) {
      const connectorStatus: ConnectorStatus = chargingStation.getConnectorStatus(connectorId)!;
      connectorStatus.localAuthorizeIdTag = idTag;
      connectorStatus.idTagLocalAuthorized = true;
      authorized = true;
    } else if (chargingStation.getRemoteAuthorization()) {
      authorized = await OCPPServiceUtils.isIdTagRemoteAuthorized(
        chargingStation,
        connectorId,
        idTag,
      );
    }
    return authorized;
  }

  protected static checkConnectorStatusTransition(
    chargingStation: ChargingStation,
    connectorId: number,
    status: ConnectorStatusEnum,
  ): boolean {
    const fromStatus = chargingStation.getConnectorStatus(connectorId)!.status;
    let transitionAllowed = false;
    switch (chargingStation.stationInfo.ocppVersion) {
      case OCPPVersion.VERSION_16:
        if (
          (connectorId === 0 &&
            OCPP16Constants.ChargePointStatusChargingStationTransitions.findIndex(
              (transition) => transition.from === fromStatus && transition.to === status,
            ) !== -1) ||
          (connectorId > 0 &&
            OCPP16Constants.ChargePointStatusConnectorTransitions.findIndex(
              (transition) => transition.from === fromStatus && transition.to === status,
            ) !== -1)
        ) {
          transitionAllowed = true;
        }
        break;
      case OCPPVersion.VERSION_20:
      case OCPPVersion.VERSION_201:
        if (
          (connectorId === 0 &&
            OCPP20Constants.ChargingStationStatusTransitions.findIndex(
              (transition) => transition.from === fromStatus && transition.to === status,
            ) !== -1) ||
          (connectorId > 0 &&
            OCPP20Constants.ConnectorStatusTransitions.findIndex(
              (transition) => transition.from === fromStatus && transition.to === status,
            ) !== -1)
        ) {
          transitionAllowed = true;
        }
        break;
      default:
        throw new BaseError(
          // eslint-disable-next-line @typescript-eslint/restrict-template-expressions
          `Cannot check connector status transition: OCPP version ${chargingStation.stationInfo.ocppVersion} not supported`,
        );
    }
    if (transitionAllowed === false) {
      logger.warn(
        `${chargingStation.logPrefix()} OCPP ${
          chargingStation.stationInfo.ocppVersion
        } connector id ${connectorId} status transition from '${
          chargingStation.getConnectorStatus(connectorId)!.status
        }' to '${status}' is not allowed`,
      );
    }
    return transitionAllowed;
  }

  protected static parseJsonSchemaFile<T extends JsonType>(
    relativePath: string,
    ocppVersion: OCPPVersion,
    moduleName?: string,
    methodName?: string,
  ): JSONSchemaType<T> {
    const filePath = join(dirname(fileURLToPath(import.meta.url)), relativePath);
    try {
      return JSON.parse(readFileSync(filePath, 'utf8')) as JSONSchemaType<T>;
    } catch (error) {
      handleFileException(
        filePath,
        FileType.JsonSchema,
        error as NodeJS.ErrnoException,
        OCPPServiceUtils.logPrefix(ocppVersion, moduleName, methodName),
        { throwError: false },
      );
      return {} as JSONSchemaType<T>;
    }
  }

  protected static getSampledValueTemplate(
    chargingStation: ChargingStation,
    connectorId: number,
    measurand: MeterValueMeasurand = MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER,
    phase?: MeterValuePhase,
  ): SampledValueTemplate | undefined {
    const onPhaseStr = phase ? `on phase ${phase} ` : '';
    if (OCPPConstants.OCPP_MEASURANDS_SUPPORTED.includes(measurand) === false) {
      logger.warn(
        `${chargingStation.logPrefix()} Trying to get unsupported MeterValues measurand '${measurand}' ${onPhaseStr}in template on connector id ${connectorId}`,
      );
      return;
    }
    if (
      measurand !== MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER &&
      getConfigurationKey(
        chargingStation,
        StandardParametersKey.MeterValuesSampledData,
      )?.value?.includes(measurand) === false
    ) {
      logger.debug(
        `${chargingStation.logPrefix()} Trying to get MeterValues measurand '${measurand}' ${onPhaseStr}in template on connector id ${connectorId} not found in '${
          StandardParametersKey.MeterValuesSampledData
        }' OCPP parameter`,
      );
      return;
    }
    const sampledValueTemplates: SampledValueTemplate[] =
      chargingStation.getConnectorStatus(connectorId)!.MeterValues;
    for (
      let index = 0;
      isNotEmptyArray(sampledValueTemplates) === true && index < sampledValueTemplates.length;
      index++
    ) {
      if (
        OCPPConstants.OCPP_MEASURANDS_SUPPORTED.includes(
          sampledValueTemplates[index]?.measurand ??
            MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER,
        ) === false
      ) {
        logger.warn(
          `${chargingStation.logPrefix()} Unsupported MeterValues measurand '${measurand}' ${onPhaseStr}in template on connector id ${connectorId}`,
        );
      } else if (
        phase &&
        sampledValueTemplates[index]?.phase === phase &&
        sampledValueTemplates[index]?.measurand === measurand &&
        getConfigurationKey(
          chargingStation,
          StandardParametersKey.MeterValuesSampledData,
        )?.value?.includes(measurand) === true
      ) {
        return sampledValueTemplates[index];
      } else if (
        !phase &&
        !sampledValueTemplates[index].phase &&
        sampledValueTemplates[index]?.measurand === measurand &&
        getConfigurationKey(
          chargingStation,
          StandardParametersKey.MeterValuesSampledData,
        )?.value?.includes(measurand) === true
      ) {
        return sampledValueTemplates[index];
      } else if (
        measurand === MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER &&
        (!sampledValueTemplates[index].measurand ||
          sampledValueTemplates[index].measurand === measurand)
      ) {
        return sampledValueTemplates[index];
      }
    }
    if (measurand === MeterValueMeasurand.ENERGY_ACTIVE_IMPORT_REGISTER) {
      const errorMsg = `Missing MeterValues for default measurand '${measurand}' in template on connector id ${connectorId}`;
      logger.error(`${chargingStation.logPrefix()} ${errorMsg}`);
      throw new BaseError(errorMsg);
    }
    logger.debug(
      `${chargingStation.logPrefix()} No MeterValues for measurand '${measurand}' ${onPhaseStr}in template on connector id ${connectorId}`,
    );
  }

  protected static getLimitFromSampledValueTemplateCustomValue(
    value: string,
    limit: number,
    options: { limitationEnabled?: boolean; unitMultiplier?: number } = {
      limitationEnabled: true,
      unitMultiplier: 1,
    },
  ): number {
    options = {
      ...{
        limitationEnabled: true,
        unitMultiplier: 1,
      },
      ...options,
    };
    const parsedInt = parseInt(value);
    const numberValue = isNaN(parsedInt) ? Infinity : parsedInt;
    return options?.limitationEnabled
      ? Math.min(numberValue * options.unitMultiplier!, limit)
      : numberValue * options.unitMultiplier!;
  }

  private static isIdTagLocalAuthorized(chargingStation: ChargingStation, idTag: string): boolean {
    return (
      chargingStation.hasIdTags() === true &&
      isNotEmptyString(
        chargingStation.idTagsCache
          .getIdTags(getIdTagsFile(chargingStation.stationInfo)!)
          ?.find((tag) => tag === idTag),
      )
    );
  }

  private static async isIdTagRemoteAuthorized(
    chargingStation: ChargingStation,
    connectorId: number,
    idTag: string,
  ): Promise<boolean> {
    chargingStation.getConnectorStatus(connectorId)!.authorizeIdTag = idTag;
    return (
      (
        await chargingStation.ocppRequestService.requestHandler<
          AuthorizeRequest,
          AuthorizeResponse
        >(chargingStation, RequestCommand.AUTHORIZE, {
          idTag,
        })
      )?.idTagInfo?.status === AuthorizationStatus.ACCEPTED
    );
  }

  private static logPrefix = (
    ocppVersion: OCPPVersion,
    moduleName?: string,
    methodName?: string,
  ): string => {
    const logMsg =
      isNotEmptyString(moduleName) && isNotEmptyString(methodName)
        ? ` OCPP ${ocppVersion} | ${moduleName}.${methodName}:`
        : ` OCPP ${ocppVersion} |`;
    return logPrefix(logMsg);
  };
}