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// Copyright 2020 Liam Tan. All rights reserved. MIT license.
import { HttpMethod, ControllerMetadata } from "./types.ts";import { getControllerMeta, defaultMetadata, setControllerMeta } from "./metadata.ts";/** * Responsible for producing function decorators for all given HttpMethods. * Uses a curried function to return the function decorator. */export const defineRouteDecorator = (path: string = "/", requestMethod: HttpMethod): MethodDecorator => (  target: any,  propertyKey: string | Symbol): void => {  const meta: ControllerMetadata = getControllerMeta(target) ?? defaultMetadata();
  meta.routes.set(propertyKey, {    requestMethod,    path,    methodName: propertyKey,  });
  setControllerMeta(target, meta);};
/** * Method decorator function for mapping Get requests. * * `path` will be the routed path with the prefix of the * parent controller prefix, E.g. * * ```ts *  @Controller('api') *  class DefaultController { *    @Get('/:id') *    public controllerAction(): any {} *  } * ``` * * The above action `controllerAction` will then be mapped * to `GET` requests that match pattern `api/:id` */export function Get(path?: string): MethodDecorator {  return defineRouteDecorator(path, HttpMethod.GET);}/** * Method decorator function for mapping Put requests. * * `path` will be the routed path with the prefix of the * parent controller prefix, E.g. * * ```ts *  @Controller('api') *  class DefaultController { *    @Put('/:id') *    public controllerAction(): any {} *  } * ``` * * The above action `controllerAction` will then be mapped * to `PUT` requests that match pattern `api/:id` */export function Put(path?: string): MethodDecorator {  return defineRouteDecorator(path, HttpMethod.PUT);}/** * Method decorator function for mapping Post requests. * * `path` will be the routed path with the prefix of the * parent controller prefix, E.g. * * ```ts *  @Controller('api') *  class DefaultController { *    @Post('/:id') *    public controllerAction(): any {} *  } * ``` * * The above action `controllerAction` will then be mapped * to `POST` requests that match pattern `api/:id` */export function Post(path?: string): MethodDecorator {  return defineRouteDecorator(path, HttpMethod.POST);}/** * Method decorator function for mapping Patch requests. * * `path` will be the routed path with the prefix of the * parent controller prefix, E.g. * * ```ts *  @Controller('api') *  class DefaultController { *    @Patch('/:id') *    public controllerAction(): any {} *  } * ``` * * The above action `controllerAction` will then be mapped * to `PATCH` requests that match pattern `api/:id` */export function Patch(path?: string): MethodDecorator {  return defineRouteDecorator(path, HttpMethod.PATCH);}/** * Method decorator function for mapping Delete requests. * * `path` will be the routed path with the prefix of the * parent controller prefix, E.g. * * ```ts *  @Controller('api') *  class DefaultController { *    @Delete('/:id') *    public controllerAction(): any {} *  } * ``` * * The above action `controllerAction` will then be mapped * to `DELETE` requests that match pattern `api/:id` */export function Delete(path?: string): MethodDecorator {  return defineRouteDecorator(path, HttpMethod.DELETE);}