feat(ls-routes): introduce ls-routes

build.sh

@@ -16,3 +16,8 @@ npm run build:ng-module-map-ngfactory-loader
 
 cp modules/ng-module-map-ngfactory-loader/package.json dist/ng-module-map-ngfactory-loader/package.json
 cp modules/ng-module-map-ngfactory-loader/README.md dist/ng-module-map-ngfactory-loader/README.md
+
+npm run build:ng-ls-routes
+
+cp modules/ng-ls-routes/package.json dist/ng-ls-routes/package.json
+cp modules/ng-ls-routes/README.md dist/ng-ls-routes/README.md

modules/ng-ls-routes/README.md

@@ -0,0 +1,23 @@
+This is a tool which will gather the routes from a build factory bundle and return them ready to be used with stamping out prerendered index.html files
+
+```js
+import { lsRoutes } from '@nguniversal/ls-routes';
+
+const {AppServerModuleNgFactory, LAZY_MODULE_MAP} = require('./main.a5d2e81ce51e0c3ba3c8.bundle.js')
+
+lsRoutes(
+  'flatPaths', 
+  {serverFactory: AppServerModuleNgFactory, lazyModuleMap: LAZY_MODULE_MAP}
+).then(paths => {
+  paths.filter(path => !path.includes(':'))
+    .forEach(path => {
+    renderModuleFactory(AppServerModuleNgFactory, {
+      document: index,
+      url: path,
+      extraProviders: [
+        provideModuleMap(LAZY_MODULE_MAP)
+      ]
+    })
+    .then(html => fs.writeFileSync(`dist/${path.replace(/\//g, '-')}.index.html`, html))
+  })
+})

modules/ng-ls-routes/index.ts

@@ -0,0 +1 @@
+export * from './src';

modules/ng-ls-routes/package.json

@@ -0,0 +1,26 @@
+{
+  "name": "@nguniversal/ls-routes",
+  "main": "index.js",
+  "types": "index.d.ts",
+  "version": "1.0.0-beta.0",
+  "description": "A tool for retrieving routes from a factory",
+  "homepage": "https://github.com/angular/universal",
+  "license": "MIT",
+  "contributors": [
+    "Toxicable"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/angular/universal"
+  },
+  "bugs": {
+    "url": "https://github.com/angular/universal/issues"
+  },
+  "peerDependencies": {
+    "@angular/core": "^4.0.0",
+    "@angular/platform-server": "^4.0.0",
+    "@angular/router": "^4.0.0",
+    "@nguniversal/module-map-ngfactory-loader": "^1.0.0",
+    "zone.js": "^0.8.4"
+  }
+}

modules/ng-ls-routes/src/index.ts

@@ -0,0 +1 @@
+export * from './ls-routes';

modules/ng-ls-routes/src/ls-routes.ts

@@ -0,0 +1,109 @@
+import 'zone.js/dist/zone-node';
+import { ReflectiveInjector, NgModuleFactoryLoader, NgModuleFactory, Injector, NgZone } from '@angular/core';
+import { platformServer } from '@angular/platform-server';
+import { provideModuleMap } from '@nguniversal/module-map-ngfactory-loader';
+import { ROUTES, Route } from '@angular/router';
+import { Observable } from "rxjs/Observable";
+import 'rxjs/add/operator/toPromise';
+
+let loader: NgModuleFactoryLoader;
+
+export function lsRoutes<T>(
+  returnType: 'flatPaths' | 'nestedPaths' | 'full',
+  factory: { serverFactory: NgModuleFactory<T>, lazyModuleMap?: any }
+) {
+  const ngZone = new NgZone({ enableLongStackTrace: false });
+  const rootInjector = ReflectiveInjector.resolveAndCreate(
+    [
+      { provide: NgZone, useValue: ngZone },
+      provideModuleMap(factory.lazyModuleMap)
+    ],
+    platformServer().injector
+  );
+  const moduleRef = factory.serverFactory.create(rootInjector);
+  loader = moduleRef.injector.get(NgModuleFactoryLoader);
+  return Promise.all(createModule(factory.serverFactory, rootInjector))
+    .then(routes => {
+      if (returnType === 'full') {
+        return routes;
+      }
+      if (returnType === 'nestedPaths') {
+        return flattenRouteToPath(routes);
+      }
+      if (returnType === 'flatPaths') {
+        return flattenArray(flattenRouteToPath(routes));
+      }
+      throw new Error('you must provide a supported returnType');
+    });
+}
+
+function flattenArray<T, V>(array: T[] | T): V[] {
+  return !Array.isArray(array) ? array : [].concat.apply([], array.map(r => flattenArray(r)));
+}
+
+function flattenRouteToPath(routes: Route[]): (string[] | string)[] {
+  return routes.map(route => {
+    if (!route.children) {
+      return route.path ? '/' + route.path : '/';
+    } else {
+      return flattenRouteToPath(route.children)
+        .map((childRoute: string) => (!route.path ? '' : '/' + route.path) + childRoute);
+    }
+  });
+}
+
+function cocerceIntoPromise<T>(mightBePromise: Observable<T> | Promise<T> | T): Promise<T> {
+  if (mightBePromise instanceof Observable) {
+    return mightBePromise.toPromise();
+  }
+  return Promise.resolve(mightBePromise);
+}
+
+function extractRoute(route: Route, injector: Injector): Promise<Route> {
+  if (route.loadChildren) {
+    return resolveLazyChildren(route, injector);
+  }
+  if (route.children) {
+    return Promise.all(route.children.map(r => extractRoute(r, injector)))
+      .then(routes => {
+        route.children = routes;
+        return route;
+      });
+  }
+  return Promise.resolve(route);
+
+}
+
+function resolveLazyChildren(route: Route, injector: Injector): Promise<Route> {
+  let nextFactory: Promise<NgModuleFactory<any>>;
+  if (typeof route.loadChildren === 'function') {
+    nextFactory = cocerceIntoPromise<NgModuleFactory<any>>(
+      < NgModuleFactory<any> | Promise<NgModuleFactory<any>> >route.loadChildren()
+    )
+  } else {
+    nextFactory = loader.load(<string>route.loadChildren)
+  }
+  return nextFactory
+    .then(factory => Promise.all(createModule(factory, injector)))
+    .then(children => {
+      route.children = children;
+      delete route.loadChildren;
+      return route;
+    });
+}
+
+function createModule<T>(factory: NgModuleFactory<T>, parentInjector: Injector): Promise<Route>[] {
+
+  const moduleRef = factory.create(parentInjector);
+  const routes = moduleRef.injector.get(ROUTES);
+
+  return flattenArray<Route[][], Route>(routes)
+    .map(route => {
+      if (!route.loadChildren) {
+        //no lazy loaded paths so we can return the routes directly
+        return extractRoute(route, parentInjector);
+      } else {
+        return resolveLazyChildren(route, moduleRef.injector);
+      }
+    });
+}

modules/ng-ls-routes/tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "../../dist/ng-ls-routes"
+  },
+  "angularCompilerOptions": {
+    "genDir": "ngfactory"
+  },
+  "files": [
+    "index.ts"
+  ]
+}

package.json

@@ -63,6 +63,7 @@
     "build:ng-express-engine": "ngc -p modules/ng-express-engine/tsconfig.json",
     "build:ng-aspnetcore-engine": "ngc -p modules/ng-aspnetcore-engine/tsconfig.json",
     "build:ng-module-map-ngfactory-loader": "ngc -p modules/ng-module-map-ngfactory-loader/tsconfig.json",
+    "build:ng-ls-routes": "ngc -p modules/ng-ls-routes/tsconfig.json",
     "build": "./build.sh",
     "test": "exit 0"
   },
@@ -71,6 +72,7 @@
     "@angular/common": "^4.0.0",
     "@angular/compiler": "^4.0.0",
     "@angular/compiler-cli": "^4.0.0",
+    "@angular/router": "^4.0.0",
     "@angular/core": "^4.0.0",
     "@angular/http": "^4.0.0",
     "@angular/platform-browser": "^4.0.0",

tsconfig.json

@@ -12,6 +12,7 @@
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,
     "sourceMap": true,
+    "skipLibCheck": true,
     "lib": [
       "dom",
       "es6"