src/charging-station/ocpp/2.0/OCPP20ResponseService.ts

   1 // Partial Copyright Jerome Benoit. 2021-2024. All Rights Reserved.
   2
   3 import type { ValidateFunction } from 'ajv'
   4
   5 import { OCPP20ServiceUtils } from './OCPP20ServiceUtils.js'
   6 import { type ChargingStation, addConfigurationKey } from '../../../charging-station/index.js'
   7 import { OCPPError } from '../../../exception/index.js'
   8 import {
   9   ErrorType,
  10   type JsonType,
  11   type OCPP20BootNotificationResponse,
  12   type OCPP20ClearCacheResponse,
  13   type OCPP20HeartbeatResponse,
  14   OCPP20IncomingRequestCommand,
  15   OCPP20OptionalVariableName,
  16   OCPP20RequestCommand,
  17   type OCPP20StatusNotificationResponse,
  18   OCPPVersion,
  19   RegistrationStatusEnumType,
  20   type ResponseHandler
  21 } from '../../../types/index.js'
  22 import { logger } from '../../../utils/index.js'
  23 import { OCPPResponseService } from '../OCPPResponseService.js'
  24
  25 const moduleName = 'OCPP20ResponseService'
  26
  27 export class OCPP20ResponseService extends OCPPResponseService {
  28   public jsonSchemasIncomingRequestResponseValidateFunction: Map<
  29   OCPP20IncomingRequestCommand,
  30   ValidateFunction<JsonType>
  31   >
  32
  33   protected jsonSchemasValidateFunction: Map<OCPP20RequestCommand, ValidateFunction<JsonType>>
  34   private readonly responseHandlers: Map<OCPP20RequestCommand, ResponseHandler>
  35
  36   public constructor () {
  37     // if (new.target.name === moduleName) {
  38     //   throw new TypeError(`Cannot construct ${new.target.name} instances directly`)
  39     // }
  40     super(OCPPVersion.VERSION_20)
  41     this.responseHandlers = new Map<OCPP20RequestCommand, ResponseHandler>([
  42       [
  43         OCPP20RequestCommand.BOOT_NOTIFICATION,
  44         this.handleResponseBootNotification.bind(this) as ResponseHandler
  45       ],
  46       [OCPP20RequestCommand.HEARTBEAT, this.emptyResponseHandler],
  47       [OCPP20RequestCommand.STATUS_NOTIFICATION, this.emptyResponseHandler]
  48     ])
  49     this.jsonSchemasValidateFunction = new Map<OCPP20RequestCommand, ValidateFunction<JsonType>>([
  50       [
  51         OCPP20RequestCommand.BOOT_NOTIFICATION,
  52         this.ajv
  53           .compile(
  54             OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20BootNotificationResponse>(
  55               'assets/json-schemas/ocpp/2.0/BootNotificationResponse.json',
  56               moduleName,
  57               'constructor'
  58             )
  59           )
  60           .bind(this)
  61       ],
  62       [
  63         OCPP20RequestCommand.HEARTBEAT,
  64         this.ajv
  65           .compile(
  66             OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20HeartbeatResponse>(
  67               'assets/json-schemas/ocpp/2.0/HeartbeatResponse.json',
  68               moduleName,
  69               'constructor'
  70             )
  71           )
  72           .bind(this)
  73       ],
  74       [
  75         OCPP20RequestCommand.STATUS_NOTIFICATION,
  76         this.ajv
  77           .compile(
  78             OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20StatusNotificationResponse>(
  79               'assets/json-schemas/ocpp/2.0/StatusNotificationResponse.json',
  80               moduleName,
  81               'constructor'
  82             )
  83           )
  84           .bind(this)
  85       ]
  86     ])
  87     this.jsonSchemasIncomingRequestResponseValidateFunction = new Map<
  88     OCPP20IncomingRequestCommand,
  89     ValidateFunction<JsonType>
  90     >([
  91       [
  92         OCPP20IncomingRequestCommand.CLEAR_CACHE,
  93         this.ajv
  94           .compile(
  95             OCPP20ServiceUtils.parseJsonSchemaFile<OCPP20ClearCacheResponse>(
  96               'assets/json-schemas/ocpp/2.0/ClearCacheResponse.json',
  97               moduleName,
  98               'constructor'
  99             )
 100           )
 101           .bind(this)
 102       ]
 103     ])
 104     this.validatePayload = this.validatePayload.bind(this)
 105   }
 106
 107   public async responseHandler<ReqType extends JsonType, ResType extends JsonType>(
 108     chargingStation: ChargingStation,
 109     commandName: OCPP20RequestCommand,
 110     payload: ResType,
 111     requestPayload: ReqType
 112   ): Promise<void> {
 113     if (chargingStation.isRegistered() || commandName === OCPP20RequestCommand.BOOT_NOTIFICATION) {
 114       if (
 115         this.responseHandlers.has(commandName) &&
 116         OCPP20ServiceUtils.isRequestCommandSupported(chargingStation, commandName)
 117       ) {
 118         try {
 119           this.validatePayload(chargingStation, commandName, payload)
 120           // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
 121           await this.responseHandlers.get(commandName)!(chargingStation, payload, requestPayload)
 122         } catch (error) {
 123           logger.error(
 124             `${chargingStation.logPrefix()} ${moduleName}.responseHandler: Handle response error:`,
 125             error
 126           )
 127           throw error
 128         }
 129       } else {
 130         // Throw exception
 131         throw new OCPPError(
 132           ErrorType.NOT_IMPLEMENTED,
 133           `${commandName} is not implemented to handle response PDU ${JSON.stringify(
 134             payload,
 135             undefined,
 136             2
 137           )}`,
 138           commandName,
 139           payload
 140         )
 141       }
 142     } else {
 143       throw new OCPPError(
 144         ErrorType.SECURITY_ERROR,
 145         `${commandName} cannot be issued to handle response PDU ${JSON.stringify(
 146           payload,
 147           undefined,
 148           2
 149         )} while the charging station is not registered on the central server.`,
 150         commandName,
 151         payload
 152       )
 153     }
 154   }
 155
 156   private validatePayload (
 157     chargingStation: ChargingStation,
 158     commandName: OCPP20RequestCommand,
 159     payload: JsonType
 160   ): boolean {
 161     if (this.jsonSchemasValidateFunction.has(commandName)) {
 162       return this.validateResponsePayload(chargingStation, commandName, payload)
 163     }
 164     logger.warn(
 165       `${chargingStation.logPrefix()} ${moduleName}.validatePayload: No JSON schema validation function found for command '${commandName}' PDU validation`
 166     )
 167     return false
 168   }
 169
 170   private handleResponseBootNotification (
 171     chargingStation: ChargingStation,
 172     payload: OCPP20BootNotificationResponse
 173   ): void {
 174     if (payload.status === RegistrationStatusEnumType.ACCEPTED) {
 175       addConfigurationKey(
 176         chargingStation,
 177         OCPP20OptionalVariableName.HeartbeatInterval,
 178         payload.interval.toString(),
 179         {},
 180         { overwrite: true, save: true }
 181       )
 182       OCPP20ServiceUtils.startHeartbeatInterval(chargingStation, payload.interval)
 183     }
 184     if (Object.values(RegistrationStatusEnumType).includes(payload.status)) {
 185       const logMsg = `${chargingStation.logPrefix()} Charging station in '${
 186         payload.status
 187       }' state on the central server`
 188       payload.status === RegistrationStatusEnumType.REJECTED
 189         ? logger.warn(logMsg)
 190         : logger.info(logMsg)
 191     } else {
 192       logger.error(
 193         `${chargingStation.logPrefix()} Charging station boot notification response received: %j with undefined registration status`,
 194         payload
 195       )
 196     }
 197   }
 198 }