+import { type ChargingStation, getIdTagsFile } from '../../charging-station/index.js'
+import { OCPPError } from '../../exception/index.js'
+import type {
+ ClearCacheResponse,
+ HandleErrorParams,
+ IncomingRequestCommand,
+ JsonType,
+ OCPPVersion
+} from '../../types/index.js'
+import { logger, setDefaultErrorParams } from '../../utils/index.js'
+import { OCPPConstants } from './OCPPConstants.js'
+import { OCPPServiceUtils } from './OCPPServiceUtils.js'
+type Ajv = _Ajv.default
+// eslint-disable-next-line @typescript-eslint/no-redeclare
+const Ajv = _Ajv.default
+const ajvFormats = _ajvFormats.default
+
+const moduleName = 'OCPPIncomingRequestService'
+
+export abstract class OCPPIncomingRequestService extends EventEmitter {
+ private static instance: OCPPIncomingRequestService | null = null
+ private readonly version: OCPPVersion
+ protected readonly ajv: Ajv
+ protected abstract payloadValidateFunctions: Map<
+ IncomingRequestCommand,
+ ValidateFunction<JsonType>
+ >
+
+ protected constructor (version: OCPPVersion) {
+ super()
+ this.version = version
+ this.ajv = new Ajv({
+ keywords: ['javaType'],
+ multipleOfPrecision: 2
+ })
+ ajvFormats(this.ajv)
+ this.incomingRequestHandler = this.incomingRequestHandler.bind(this)
+ this.validateIncomingRequestPayload = this.validateIncomingRequestPayload.bind(this)
+ }
+
+ 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,
+ payload: T
+ ): boolean {
+ if (chargingStation.stationInfo?.ocppStrictCompliance === false) {
+ return true
+ }
+ const validate = this.payloadValidateFunctions.get(commandName)
+ if (validate?.(payload) === true) {
+ 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)
+ )