+const moduleName = 'OCPPIncomingRequestService'
+
+export abstract class OCPPIncomingRequestService {
+ private static instance: OCPPIncomingRequestService | null = null
+ private readonly version: OCPPVersion
+ private readonly ajv: Ajv
+ private readonly jsonValidateFunctions: Map<IncomingRequestCommand, ValidateFunction<JsonType>>
+ protected abstract jsonSchemas: Map<IncomingRequestCommand, JSONSchemaType<JsonType>>
+
+ protected constructor (version: OCPPVersion) {
+ this.version = version
+ this.ajv = new Ajv({
+ keywords: ['javaType'],
+ multipleOfPrecision: 2
+ })
+ ajvFormats(this.ajv)
+ this.jsonValidateFunctions = new Map<IncomingRequestCommand, ValidateFunction<JsonType>>()
+ this.incomingRequestHandler = this.incomingRequestHandler.bind(this) as <
+ ReqType extends JsonType,
+ // eslint-disable-next-line @typescript-eslint/no-unused-vars
+ ResType extends JsonType
+ >(
+ chargingStation: ChargingStation,
+ messageId: string,
+ commandName: IncomingRequestCommand,
+ commandPayload: ReqType
+ ) => Promise<void>
+ this.validateIncomingRequestPayload = this.validateIncomingRequestPayload.bind(this) as <
+ T extends JsonType
+ >(
+ chargingStation: ChargingStation,
+ commandName: IncomingRequestCommand,
+ schema: JSONSchemaType<T>,
+ payload: T
+ ) => boolean
+ }
+
+ public static getInstance<T extends OCPPIncomingRequestService>(this: new () => T): T {
+ if (OCPPIncomingRequestService.instance === null) {
+ OCPPIncomingRequestService.instance = new this()
+ }
+ return OCPPIncomingRequestService.instance as T
+ }
+
+ protected handleIncomingRequestError<T extends JsonType>(
+ chargingStation: ChargingStation,
+ commandName: IncomingRequestCommand,
+ error: Error,
+ params: HandleErrorParams<T> = { throwError: true, consoleOut: false }
+ ): T | undefined {
+ setDefaultErrorParams(params)
+ logger.error(
+ `${chargingStation.logPrefix()} ${moduleName}.handleIncomingRequestError: Incoming request command '${commandName}' error:`,
+ error
+ )
+ if (params.throwError === false && params.errorResponse != null) {
+ return params.errorResponse
+ }
+ if (params.throwError === true && params.errorResponse == null) {
+ throw error
+ }
+ if (params.throwError === true && params.errorResponse != null) {
+ return params.errorResponse
+ }
+ }
+
+ protected validateIncomingRequestPayload<T extends JsonType>(
+ chargingStation: ChargingStation,
+ commandName: IncomingRequestCommand,
+ schema: JSONSchemaType<T>,
+ payload: T
+ ): boolean {
+ if (chargingStation.stationInfo?.ocppStrictCompliance === false) {
+ return true
+ }
+ const validate = this.getJsonIncomingRequestValidateFunction<T>(commandName, schema)
+ if (validate(payload)) {
+ return true
+ }
+ logger.error(
+ `${chargingStation.logPrefix()} ${moduleName}.validateIncomingRequestPayload: Command '${commandName}' incoming request PDU is invalid: %j`,
+ validate.errors
+ )
+ throw new OCPPError(
+ OCPPServiceUtils.ajvErrorsToErrorType(validate.errors),
+ 'Incoming request PDU is invalid',
+ commandName,
+ JSON.stringify(validate.errors, undefined, 2)
+ )
+ }
+
+ protected handleRequestClearCache (chargingStation: ChargingStation): ClearCacheResponse {
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ if (chargingStation.idTagsCache.deleteIdTags(getIdTagsFile(chargingStation.stationInfo!)!)) {
+ return OCPPConstants.OCPP_RESPONSE_ACCEPTED
+ }
+ return OCPPConstants.OCPP_RESPONSE_REJECTED