55 lines
1.5 KiB
TypeScript
55 lines
1.5 KiB
TypeScript
import * as plugins from './typedrequest.plugins';
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import { TypedResponseError } from './typedrequest.classes.typedresponseerror';
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type THandlerFunction<T extends plugins.typedRequestInterfaces.ITypedRequest> = (
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requestArg: T['request']
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) => Promise<T['response']>;
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/**
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* typed handler for dealing with typed requests
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*/
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export class TypedHandler<T extends plugins.typedRequestInterfaces.ITypedRequest> {
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public method: string;
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private handlerFunction: THandlerFunction<T>;
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constructor(methodArg: T['method'], handlerFunctionArg: THandlerFunction<T>) {
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this.method = methodArg;
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this.handlerFunction = handlerFunctionArg;
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}
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/**
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* adds a response to the typedRequest
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* @param typedRequestArg
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*/
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public async addResponse(typedRequestArg: T) {
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if (typedRequestArg.method !== this.method) {
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throw new Error(
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'this handler has been given a wrong method to answer to. Please use a TypedRouter to filter requests'
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);
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}
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let typedResponseError: TypedResponseError;
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const response = await this.handlerFunction(typedRequestArg.request).catch(e => {
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if (e instanceof TypedResponseError) {
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typedResponseError = e;
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} else {
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throw e;
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}
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});
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if (typedResponseError) {
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typedRequestArg.error = {
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text: typedResponseError.errorText,
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data: typedResponseError.errorData
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};
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}
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if (response) {
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typedRequestArg.response = response;
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}
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typedRequestArg.correlation.phase = 'response';
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return typedRequestArg;
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}
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}
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