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import { Node } from "./deps.ts";import { Context } from "./context.ts";import type { RequestHandler } from "../types.ts";import { removeTrailingSlash } from "./utils.ts";
/** * Based on the work of abc {@link https://github.com/zhmushan/abc/blob/master/router.ts} */export class Router<TApplication> { trees: Record<string, Node<RequestHandler<TApplication>>> = {};
add( method: string, path: string, handler: RequestHandler<TApplication>, ): void { if (path[0] !== "/") { path = `/${path}`; }
path = removeTrailingSlash(path);
let root = this.trees[method];
if (!root) { root = new Node<RequestHandler<TApplication>>(); this.trees[method] = root; }
root.add(path, handler); }
find( method: string, context: Context<TApplication>, ): RequestHandler<TApplication> { const node = this.trees[method]; let path = context.url.pathname;
path = removeTrailingSlash(path);
let requestHandler: RequestHandler<TApplication> | undefined;
if (node) { const [handle] = node.find(path); if (handle) { requestHandler = handle; } }
return requestHandler ?? (() => new Response("Not found", { status: 404 })); }}