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import {  ServerRequest,} from "./deps.ts";import { Route } from "./route.ts";import { str_to_method } from "./method.ts";import { HandlerResult } from "./handler.ts";import { loggerWarning } from "./logger.ts";
interface RoutesMedia {  request: ServerRequest;  segments: string[];}
export class Routes {  private len: number;  media: RoutesMedia | null;  [k: number]: Route | undefined  constructor() {    this.len = 0;    this.media = null;  }
  add(this: this, base: string, route: Route): void {    route.set_uri(base, route.uri);    this[this.len] = route;    this.len++;  }
  remove(this: this, route: Route): boolean {    let index = this.len;    while (index-- > 0) {      if (this[index] !== route) {        this[index] = undefined;        return true;      }    }    return false;  }
  private async *iterateRoutes(    { request, segments }: RoutesMedia,  ): AsyncIterableIterator<HandlerResult> {    const method = str_to_method(request.method);    if (method === undefined) {      loggerWarning(`invalid method\nrequest url ${request.url}`);      return yield null;    }    let index = this.len;    let route: Route | undefined;    while (index-- > 0) {      route = this[index];      if (route !== undefined) {        const params = route.match(method, segments);        if (params === null) {          return null;        }        yield await route.handler(request, params);      }    }    return;  }
  [Symbol.asyncIterator](    media = this.media,  ): AsyncIterableIterator<HandlerResult> {    this.media = null;    if (media === null) {      throw new TypeError("routes media is null");    }    return this.iterateRoutes(media);  }}