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Merge pull request #6 from yldrmzffr/feature/new-routing-system
feat(major restructuring): implement controller and request handler c…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| import {RouteManager} from '../routing/route-manager'; | ||
| import * as pathLib from 'path'; | ||
| import {Route} from '../interfaces'; | ||
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| export type ControllerDecorator = (path?: string) => ClassDecorator; | ||
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| export class ControllerFactory { | ||
| constructor(private routeManager: RouteManager) {} | ||
| public Controller: ControllerDecorator = (path = '') => { | ||
| return (target: any) => { | ||
| Reflect.defineMetadata('path', path, target); | ||
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| const properties = Object.getOwnPropertyNames(target.prototype); | ||
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| const routers: (Route | undefined)[] = properties.map(property => { | ||
| const routeHandler = target.prototype[property]; | ||
| const method = Reflect.getMetadata('method', routeHandler); | ||
| const url = Reflect.getMetadata('url', routeHandler); | ||
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| if (!method || !url) return; | ||
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| const fullPath = pathLib.join(path, url); | ||
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| return { | ||
| method, | ||
| url: fullPath, | ||
| handler: routeHandler.bind(target.prototype), | ||
| } as Route; | ||
| }); | ||
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| this.routeManager.addRoutes(routers.filter(Boolean) as Route[]); | ||
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| return target; | ||
| }; | ||
| }; | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,72 @@ | ||
| import {Request} from '../interfaces'; | ||
| import {Response} from '../types'; | ||
| import {RouteManager} from '../routing/route-manager'; | ||
| import {NotFoundException} from '../exceptions/not-found.exception'; | ||
| import {getRequestBody, parseQueryParams} from '../utils'; | ||
| import {MuzuException} from '../exceptions/muzu.exception'; | ||
| import {BadRequestException} from '../exceptions/bad-request.exception'; | ||
| export class RequestHandler { | ||
| private routeManager: RouteManager; | ||
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| constructor(routeManager: RouteManager) { | ||
| this.routeManager = routeManager; | ||
| } | ||
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| private async sendResponse( | ||
| res: Response, | ||
| statusCode: number, | ||
| body: Object | ||
| ): Promise<void> { | ||
| res.writeHead(statusCode, {'Content-Type': 'application/json'}); | ||
| res.end(JSON.stringify(body)); | ||
| console.log('📤 Response', {statusCode, body}); | ||
| } | ||
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| public async handleRequest(req: Request, res: Response): Promise<void> { | ||
| try { | ||
| const {url, method} = req; | ||
| const path = url!.split('?')[0]; | ||
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| req.params = parseQueryParams(url!); | ||
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| const route = await this.routeManager.find(path, method); | ||
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| if (!route) { | ||
| throw new NotFoundException(`Route ${method} ${path} not found`, { | ||
| method, | ||
| path, | ||
| }); | ||
| } | ||
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| try { | ||
| const body = await getRequestBody(req); | ||
| req.body = body; | ||
| } catch (error) { | ||
| console.log('🚨 Error parsing body', error); | ||
| const err = error as MuzuException; | ||
| throw new BadRequestException('Error parsing body', err.details); | ||
| } | ||
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| let result: Object = route.handler(req, res); | ||
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| if (result instanceof Promise) { | ||
| result = await result; | ||
| } | ||
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| const statusCode = res.statusCode || 200; | ||
| return this.sendResponse(res, statusCode, result); | ||
| } catch (error) { | ||
| console.log('🚨 Error handling request', error); | ||
| const knownError = error as MuzuException; | ||
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| if (knownError.kind === 'MuzuException') { | ||
| return this.sendResponse(res, knownError.status, knownError); | ||
| } | ||
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| return this.sendResponse(res, 500, { | ||
| message: '500 Internal Server Error', | ||
| stack: knownError.stack, | ||
| }); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| import {RequestMethod} from '../types'; | ||
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| type HttpMethodDecorator = ( | ||
| target: any, | ||
| propertyKey: string, | ||
| descriptor: PropertyDescriptor | ||
| ) => PropertyDescriptor; | ||
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| export type MethodDecorator = (url?: string) => HttpMethodDecorator; | ||
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| export class MethodFactory { | ||
| public HttpMethod(method: RequestMethod, url: string): HttpMethodDecorator { | ||
| return ( | ||
| target: any, | ||
| propertyKey: string, | ||
| descriptor: PropertyDescriptor | ||
| ) => { | ||
| Reflect.defineMetadata( | ||
| 'url', | ||
| `${url}`.toLowerCase(), | ||
| target[propertyKey] | ||
| ); | ||
| Reflect.defineMetadata('method', method, target[propertyKey]); | ||
| return descriptor; | ||
| }; | ||
| } | ||
| Get = (url = '/'): HttpMethodDecorator => { | ||
| return this.HttpMethod(RequestMethod.GET, url); | ||
| }; | ||
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| Post = (url = '/'): HttpMethodDecorator => { | ||
| return this.HttpMethod(RequestMethod.POST, url); | ||
| }; | ||
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| Delete = (url = '/'): HttpMethodDecorator => { | ||
| return this.HttpMethod(RequestMethod.DELETE, url); | ||
| }; | ||
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| Put = (url = '/'): HttpMethodDecorator => { | ||
| return this.HttpMethod(RequestMethod.PUT, url); | ||
| }; | ||
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| Patch = (url = '/'): HttpMethodDecorator => { | ||
| return this.HttpMethod(RequestMethod.PATCH, url); | ||
| }; | ||
| } | ||
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