handler.ts

import { Response } from "./response.ts";
import { Params } from "./params.ts";

export enum Method {
  GET = "GET",
  POST = "POST",
  PUT = "PUT",
  PATCH = "PATCH",
  DELETE = "DELETE",
  OPTIONS = "OPTIONS",
  LINK = "LINK",
  UNLINK = "UNLINK",
}

export type Context = {
  readonly path: string;
  readonly method: Method;
  params: Params;
};

export type Handler = BasicHandler | AsyncHandler;

export interface BasicHandler {
  (ctx: Context): Response;
}

export interface AsyncHandler {
  (ctx: Context): Promise<Response>;
}

export type HandlerConfig = {
  path: string;
  method: Method;
  handler: Handler;
};

export function get(path: string, handler: Handler): HandlerConfig {
  return { path, method: Method.GET, handler };
}

export function post(path: string, handler: Handler): HandlerConfig {
  return { path, method: Method.POST, handler };
}

export function put(path: string, handler: Handler): HandlerConfig {
  return { path, method: Method.PUT, handler };
}

export function patch(path: string, handler: Handler): HandlerConfig {
  return { path, method: Method.PATCH, handler };
}

export function del(path: string, handler: Handler): HandlerConfig {
  return { path, method: Method.DELETE, handler };
}

export function options(path: string, handler: Handler): HandlerConfig {
  return { path, method: Method.OPTIONS, handler };
}

export function link(path: string, handler: Handler): HandlerConfig {
  return { path, method: Method.LINK, handler };
}

export function unlink(path: string, handler: Handler): HandlerConfig {
  return { path, method: Method.UNLINK, handler };
}