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import { extname, globToRegExp, join } from "https://deno.land/std@0.136.0/path/mod.ts";import type { Route, RouteRecord } from "../framework/core/route.ts";import { URLPatternCompat, type URLPatternInput } from "../framework/core/url_pattern.ts";import { getFiles } from "../lib/fs.ts";import log from "../lib/log.ts";import util from "../lib/util.ts";import type { DependencyGraph } from "./graph.ts";import { globalIt } from "./helpers.ts";import type { AlephConfig, RoutesConfig } from "./types.ts";
const revivedModules: Map<string, Record<string, unknown>> = new Map();
/** revive a route module. */export function revive(filename: string, module: Record<string, unknown>) {  if (Deno.env.get("ALEPH_ENV") !== "development") {    revivedModules.set(filename, module);  }}
/** import the route module. */export async function importRouteModule(filename: string) {  let mod: Record<string, unknown>;  if (revivedModules.has(filename)) {    mod = revivedModules.get(filename)!;  } else {    const graph: DependencyGraph | undefined = Reflect.get(globalThis, "serverDependencyGraph");    const version = graph?.get(filename)?.version || graph?.mark(filename, {}).version || Date.now().toString(16);    const port = Deno.env.get("ALEPH_MODULES_PROXY_PORT");    mod = await import(`http://localhost:${port}${filename.slice(1)}?v=${version}`);  }  return mod;}
/* check if the filename is a route */export function isRouteFile(filename: string): boolean {  const currentRoutes: RouteRecord | undefined = Reflect.get(globalThis, "__ALEPH_ROUTES");  const index = currentRoutes?.routes.findIndex(([_, meta]) => meta.filename === filename);  if (index !== undefined && index !== -1) {    return true;  }  const config: AlephConfig | undefined = Reflect.get(globalThis, "__ALEPH_CONFIG");  if (config && config.routes) {    const reg = toRouteRegExp(config.routes);    return reg.test(filename);  }  return false;}
type RouteRegExp = {  prefix: string;  generate?: boolean;  test(filename: string): boolean;  exec(filename: string): URLPatternInput | null;};
/** initialize routes from routes config */export async function initRoutes(config: string | RoutesConfig | RouteRegExp, cwd = Deno.cwd()): Promise<RouteRecord> {  return await globalIt("__ALEPH_ROUTES", async () => {    const reg = isRouteRegExp(config) ? config : toRouteRegExp(config);    const files = await getFiles(join(cwd, reg.prefix));    const routes: Route[] = [];    let _app: Route | undefined = undefined;    let _404: Route | undefined = undefined;    let _error: Route | undefined = undefined;    files.forEach((file) => {      const filename = reg.prefix + file.slice(1);      const pattern = reg.exec(filename);      if (pattern) {        const route: Route = [          new URLPatternCompat(pattern),          { pattern, filename },        ];        routes.push(route);        if (pattern.pathname === "/_app") {          _app = route;        } else if (pattern.pathname === "/_404") {          _404 = route;        } else if (pattern.pathname === "/_error") {          _error = route;        }      }    });    if (routes.length > 0) {      // sort routes by length of pathname      routes.sort((a, b) => getRouteOrder(a) - getRouteOrder(b));      // check nesting routes      routes.forEach(([_, meta]) => {        const { pattern: { pathname } } = meta;        const nesting = pathname === "/_app" || (pathname !== "/" && !pathname.endsWith("/index") &&          routes.findIndex(([_, { pattern: { pathname: p } }]) => p !== pathname && p.startsWith(pathname + "/")) !==            -1);        if (nesting) {          meta.nesting = true;        }      });    }
    log.debug(`${routes.length} routes initiated`);    return { routes, _404, _app, _error };  });}
/** convert route config to `RouteRegExp` */export function toRouteRegExp(config: string | RoutesConfig): RouteRegExp {  const isObject = util.isPlainObject(config);  const prefix = "." + util.cleanPath(util.splitBy(isObject ? config.glob : config, "*")[0]);  const reg = globToRegExp("./" + util.trimPrefix(util.trimPrefix(isObject ? config.glob : config, "/"), "./"));
  return {    prefix,    generate: isObject ? config.generate : undefined,    test: (s: string) => reg.test(s),    exec: (filename: string): URLPatternInput | null => {      if (reg.test(filename)) {        const parts = util.splitPath(util.trimPrefix(filename, prefix)).map((part) => {          // replace `/blog/[...path]` to `/blog/:path+`          if (part.startsWith("[...") && part.includes("]") && part.length > 5) {            return ":" + part.slice(4).replace("]", "+");          }          // replace `/blog/[id]` to `/blog/:id`          if (part.startsWith("[") && part.includes("]") && part.length > 2) {            return ":" + part.slice(1).replace("]", "");          }          // replace `/blog/$id` to `/blog/:id`          if (part.startsWith("$") && part.length > 1) {            return ":" + part.slice(1);          }          return part;        });        let host: string | undefined = undefined;        if (isObject && config.host && parts.length > 1 && parts[0].startsWith("@")) {          host = parts.shift()!.slice(1);        }        const basename = parts.pop()!;        const pathname = "/" + [...parts, util.trimSuffix(basename, extname(basename))].join("/");        return { host, pathname: pathname === "/index" ? "/" : pathname };      }      return null;    },  };}
// check if route is index routefunction isRouteRegExp(v: unknown): v is RouteRegExp {  return util.isPlainObject(v) && typeof v.test === "function" && typeof v.exec === "function";}
/** get route order by pathname length */function getRouteOrder([_, meta]: Route): number {  const { pattern, filename } = meta;  switch (pattern.pathname) {    case "/_404":    case "/_app":    case "/_error":      return 0;    default:      return filename.split("/").length + (pattern.pathname.split("/:").length - 1) * 0.01;  }}