+const moduleName = 'OCPPResponseService';
+
+export abstract class OCPPResponseService {
+ private static instance: OCPPResponseService | null = null;
+
+ public jsonIncomingRequestResponseValidateFunctions: Map<
+ IncomingRequestCommand,
+ ValidateFunction<JsonType>
+ >;
+
+ private readonly version: OCPPVersion;
+ private readonly ajv: Ajv;
+ private jsonRequestValidateFunctions: Map<RequestCommand, ValidateFunction<JsonType>>;
+
+ public abstract jsonIncomingRequestResponseSchemas: Map<
+ IncomingRequestCommand,
+ JSONSchemaType<JsonType>
+ >;
+
+ protected constructor(version: OCPPVersion) {
+ this.version = version;
+ this.ajv = new Ajv({
+ keywords: ['javaType'],
+ multipleOfPrecision: 2,
+ });
+ ajvFormats(this.ajv);
+ this.jsonRequestValidateFunctions = new Map<RequestCommand, ValidateFunction<JsonType>>();
+ this.jsonIncomingRequestResponseValidateFunctions = new Map<
+ IncomingRequestCommand,
+ ValidateFunction<JsonType>
+ >();
+ this.responseHandler = this.responseHandler.bind(this) as <
+ ReqType extends JsonType,
+ ResType extends JsonType,
+ >(
+ chargingStation: ChargingStation,
+ commandName: RequestCommand,
+ payload: ResType,
+ requestPayload: ReqType,
+ ) => Promise<void>;
+ this.validateResponsePayload = this.validateResponsePayload.bind(this) as <T extends JsonType>(
+ chargingStation: ChargingStation,
+ commandName: RequestCommand,
+ schema: JSONSchemaType<T>,
+ payload: T,
+ ) => boolean;
+ }
+
+ public static getInstance<T extends OCPPResponseService>(this: new () => T): T {
+ if (OCPPResponseService.instance === null) {
+ OCPPResponseService.instance = new this();
+ }
+ return OCPPResponseService.instance as T;
+ }
+
+ protected validateResponsePayload<T extends JsonType>(
+ chargingStation: ChargingStation,
+ commandName: RequestCommand,
+ schema: JSONSchemaType<T>,
+ payload: T,
+ ): boolean {
+ if (chargingStation.getOcppStrictCompliance() === false) {
+ return true;
+ }
+ if (this.jsonRequestValidateFunctions.has(commandName) === false) {
+ this.jsonRequestValidateFunctions.set(
+ commandName,
+ this.ajv.compile<JsonType>(schema).bind(this),
+ );
+ }
+ const validate = this.jsonRequestValidateFunctions.get(commandName)!;
+ if (validate(payload)) {
+ return true;
+ }
+ logger.error(
+ `${chargingStation.logPrefix()} ${moduleName}.validateResponsePayload: Command '${commandName}' response PDU is invalid: %j`,
+ validate.errors,
+ );
+ throw new OCPPError(
+ OCPPServiceUtils.ajvErrorsToErrorType(validate.errors!),
+ 'Response PDU is invalid',
+ commandName,
+ JSON.stringify(validate.errors, undefined, 2),
+ );
+ }
+
+ protected emptyResponseHandler() {
+ /* This is intentional */