Reputation: 926
I am trying to create my own custom platform for use in Angular 7. The basic idea is to provide a platform for rendering into a terminal. Here's where I currently am:
(based more or less on Victor Savkin's very excellent tutorial: Experiments with Angular Renderers)
import { Renderer2, RendererStyleFlags2, NgModule, RootRenderer, RendererFactory2, RendererType2, NgZone, APP_INITIALIZER, Injectable } from '@angular/core';
export type ConsoleNode = ConsoleElement | ConsoleText;
export class ConsoleRenderer extends Renderer2 {
// extremely basic renderer tree management in here -- not important right now
}
@Injectable()
export class ConsoleRendererFactory implements RendererFactory2 {
public defaultRenderer = new ConsoleRenderer();
createRenderer(hostElement: ConsoleNode, type: RendererType2): Renderer2 {
return this.defaultRenderer;
}
}
export function setUpRenderFlushing(zone: NgZone, rendererFactory: ConsoleRendererFactory) {
return () => {
zone.onStable.subscribe(() => {
console.group('--');
console.log(rendererFactory.defaultRenderer.root);
console.log(JSON.stringify(rendererFactory.defaultRenderer.root, null, 2));
console.groupEnd();
});
};
}
(based loosely on the Angular-supplied platforms)
/* imports, etc */
export const PLATFORM_CONSOLE_ID = 'console';
export const INTERNAL_CONSOLE_PLATFORM_PROVIDERS: StaticProvider[] = [
{ provide: PLATFORM_ID, useValue: PLATFORM_CONSOLE_ID },
{provide: COMPILER_OPTIONS, useValue: {}, multi: true},
{provide: CompilerFactory, useClass: JitCompilerFactory, deps: [COMPILER_OPTIONS]},
{ provide: DOCUMENT, useFactory: getDocument, deps: [] }
]
export const platformConsole: (extraProviders?: StaticProvider[]) => PlatformRef =
createPlatformFactory(platformCore, 'console', INTERNAL_CONSOLE_PLATFORM_PROVIDERS);
export function getDocument(): any {
return document;
}
export function getErrorHandler(): ErrorHandler {
return new ErrorHandler();
}
export const CONSOLE_MODULE_PROVIDERS: StaticProvider[] = [
{ provide: APP_ROOT, useValue: true },
{ provide: ErrorHandler, useFactory: getErrorHandler, deps: [] },
{ provide: RendererFactory2, useClass: ConsoleRendererFactory, deps: [] },
{
provide: APP_INITIALIZER,
multi: true,
useFactory: setUpRenderFlushing,
deps: [NgZone, RendererFactory2]
}
];
@NgModule({
providers: CONSOLE_MODULE_PROVIDERS,
exports: [CommonModule, ApplicationModule]
})
export class ConsoleModule {
constructor(@Optional() @SkipSelf() @Inject(ConsoleModule) parentModule: ConsoleModule | null) {
if (parentModule) {
throw new Error(
`ConsoleModule has already been loaded.`
);
}
}
}
(in my test app)
const __Zone_disable_XHR = true;
import 'zone.js';
import 'reflect-metadata';
import { enableProdMode, CompilerFactory, COMPILER_OPTIONS } from '@angular/core';
import { AppModule } from './app/app.module';
import { environment } from './environments/environment';
import { platformConsole } from '../platform_console';
if (environment.production) {
enableProdMode();
}
platformConsole().bootstrapModule(AppModule)
.catch(err => console.error(err));
(in my test app)
/* imports, etc */
@NgModule({
declarations: [
AppComponent,
ChildComponent
],
imports: [
ConsoleModule
],
bootstrap: [AppComponent]
})
export class AppModule { }
I'm using the angular-build:server builder because it seems to be the most straight-forward one of the bunch. Everything else is pretty much what you get after you spin up a brand new Angular app using the CLI.
Everything compiles just fine, into a single main.js file, but when I run it, I get an error:
throw new Error("No NgModule metadata found for '" + stringify(type) + "'.");
^
Error: No NgModule metadata found for 'AppModule'.
at NgModuleResolver.resolve ((project root)\node_modules\@angular\compiler\bundles\compiler.umd.js:20020:27)
at CompileMetadataResolver.getNgModuleMetadata ((project root)\node_modules\@angular\compiler\bundles\compiler.umd.js:18662:47)
at JitCompiler._loadModules ((project root)\node_modules\@angular\compiler\bundles\compiler.umd.js:26085:55)
at JitCompiler._compileModuleAndComponents ((project root)\node_modules\@angular\compiler\bundles\compiler.umd.js:26066:40)
at JitCompiler.compileModuleAsync ((project root)\node_modules\@angular\compiler\bundles\compiler.umd.js:26026:41)
at CompilerImpl.compileModuleAsync ((project root)\node_modules\@angular\platform-browser-dynamic\bundles\platform-browser-dynamic.umd.js:202:35)
at compileNgModuleFactory__PRE_R3__ ((project root)\node_modules\@angular\core\bundles\core.umd.js:17664:25)
at PlatformRef.bootstrapModule ((project root)\node_modules\@angular\core\bundles\core.umd.js:17847:20)
at Module../src/main.ts ((project root)\dist\main.js:444:77)
at __webpack_require__ ((project root)\dist\main.js:20:30)
What am I missing here? Why isn't my metadata making it into the compiled bundle?
I wonder if it is because I am using a JitCompiler and perhaps the server builder is treating my files as if they were Aot... If that is the case, how do I go about creating and using an AotCompiler without having to write one from scratch?
I was able to get a successful run using just my renderer shimmed into the platformServer, but I was unable to access Node from inside my components (I imagine there is some browser-y sandboxing at play there). This is a deal-breaker, as I intend to achieve the dream combination of node-level closeness to the OS with all the dynamic/reactive goodness offered by Angular et al. Ultimately, I would like to extend this nascent platform with a proper EventManager driven by Node's events as well as any other services one would expect to have inside a terminal.
I am finding it hard to find information on working in this layer of Angular.
Thank you for your time.
Upvotes: 3
Views: 670