/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
import { Compiler, Injectable, InjectFlags, InjectionToken, Injector, NgModuleFactory } from '@angular/core';
import { ConnectableObservable, from, of, Subject } from 'rxjs';
import { finalize, map, mergeMap, refCount, tap } from 'rxjs/operators';
import { flatten, wrapIntoObservable } from './utils/collection';
import { assertStandalone, standardizeConfig, validateConfig } from './utils/config';
import * as i0 from "@angular/core";
const NG_DEV_MODE = typeof ngDevMode === 'undefined' || !!ngDevMode;
/**
 * The [DI token](guide/glossary/#di-token) for a router configuration.
 *
 * `ROUTES` is a low level API for router configuration via dependency injection.
 *
 * We recommend that in almost all cases to use higher level APIs such as `RouterModule.forRoot()`,
 * `RouterModule.forChild()`, `provideRoutes`, or `Router.resetConfig()`.
 *
 * @publicApi
 */
export const ROUTES = new InjectionToken('ROUTES');
export class RouterConfigLoader {
    constructor(injector, compiler) {
        this.injector = injector;
        this.compiler = compiler;
        this.componentLoaders = new WeakMap();
        this.childrenLoaders = new WeakMap();
    }
    loadComponent(route) {
        if (this.componentLoaders.get(route)) {
            return this.componentLoaders.get(route);
        }
        else if (route._loadedComponent) {
            return of(route._loadedComponent);
        }
        if (this.onLoadStartListener) {
            this.onLoadStartListener(route);
        }
        const loadRunner = wrapIntoObservable(route.loadComponent())
            .pipe(tap(component => {
            if (this.onLoadEndListener) {
                this.onLoadEndListener(route);
            }
            NG_DEV_MODE && assertStandalone(route.path ?? '', component);
            route._loadedComponent = component;
        }), finalize(() => {
            this.componentLoaders.delete(route);
        }));
        // Use custom ConnectableObservable as share in runners pipe increasing the bundle size too much
        const loader = new ConnectableObservable(loadRunner, () => new Subject()).pipe(refCount());
        this.componentLoaders.set(route, loader);
        return loader;
    }
    loadChildren(parentInjector, route) {
        if (this.childrenLoaders.get(route)) {
            return this.childrenLoaders.get(route);
        }
        else if (route._loadedRoutes) {
            return of({ routes: route._loadedRoutes, injector: route._loadedInjector });
        }
        if (this.onLoadStartListener) {
            this.onLoadStartListener(route);
        }
        const moduleFactoryOrRoutes$ = this.loadModuleFactoryOrRoutes(route.loadChildren);
        const loadRunner = moduleFactoryOrRoutes$.pipe(map((factoryOrRoutes) => {
            if (this.onLoadEndListener) {
                this.onLoadEndListener(route);
            }
            // This injector comes from the `NgModuleRef` when lazy loading an `NgModule`. There is no
            // injector associated with lazy loading a `Route` array.
            let injector;
            let rawRoutes;
            let requireStandaloneComponents = false;
            if (Array.isArray(factoryOrRoutes)) {
                rawRoutes = factoryOrRoutes;
                requireStandaloneComponents = true;
            }
            else {
                injector = factoryOrRoutes.create(parentInjector).injector;
                // When loading a module that doesn't provide `RouterModule.forChild()` preloader
                // will get stuck in an infinite loop. The child module's Injector will look to
                // its parent `Injector` when it doesn't find any ROUTES so it will return routes
                // for it's parent module instead.
                rawRoutes = flatten(injector.get(ROUTES, [], InjectFlags.Self | InjectFlags.Optional));
            }
            const routes = rawRoutes.map(standardizeConfig);
            NG_DEV_MODE && validateConfig(routes, route.path, requireStandaloneComponents);
            return { routes, injector };
        }), finalize(() => {
            this.childrenLoaders.delete(route);
        }));
        // Use custom ConnectableObservable as share in runners pipe increasing the bundle size too much
        const loader = new ConnectableObservable(loadRunner, () => new Subject())
            .pipe(refCount());
        this.childrenLoaders.set(route, loader);
        return loader;
    }
    loadModuleFactoryOrRoutes(loadChildren) {
        return wrapIntoObservable(loadChildren()).pipe(mergeMap((t) => {
            if (t instanceof NgModuleFactory || Array.isArray(t)) {
                return of(t);
            }
            else {
                return from(this.compiler.compileModuleAsync(t));
            }
        }));
    }
}
RouterConfigLoader.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "14.2.8", ngImport: i0, type: RouterConfigLoader, deps: [{ token: i0.Injector }, { token: i0.Compiler }], target: i0.ɵɵFactoryTarget.Injectable });
RouterConfigLoader.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "14.2.8", ngImport: i0, type: RouterConfigLoader, providedIn: 'root' });
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "14.2.8", ngImport: i0, type: RouterConfigLoader, decorators: [{
            type: Injectable,
            args: [{ providedIn: 'root' }]
        }], ctorParameters: function () { return [{ type: i0.Injector }, { type: i0.Compiler }]; } });
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Compiler, EnvironmentInjector, Injectable, InjectFlags, InjectionToken, Injector, NgModuleFactory, Type} from '@angular/core';\nimport {ConnectableObservable, from, Observable, of, Subject} from 'rxjs';\nimport {catchError, finalize, map, mergeMap, refCount, tap} from 'rxjs/operators';\n\nimport {LoadChildren, LoadedRouterConfig, Route, Routes} from './models';\nimport {flatten, wrapIntoObservable} from './utils/collection';\nimport {assertStandalone, standardizeConfig, validateConfig} from './utils/config';\n\n\nconst NG_DEV_MODE = typeof ngDevMode === 'undefined' || !!ngDevMode;\n\n/**\n * The [DI token](guide/glossary/#di-token) for a router configuration.\n *\n * `ROUTES` is a low level API for router configuration via dependency injection.\n *\n * We recommend that in almost all cases to use higher level APIs such as `RouterModule.forRoot()`,\n * `RouterModule.forChild()`, `provideRoutes`, or `Router.resetConfig()`.\n *\n * @publicApi\n */\nexport const ROUTES = new InjectionToken<Route[][]>('ROUTES');\n\ntype ComponentLoader = Observable<Type<unknown>>;\n\n@Injectable({providedIn: 'root'})\nexport class RouterConfigLoader {\n  private componentLoaders = new WeakMap<Route, ComponentLoader>();\n  private childrenLoaders = new WeakMap<Route, Observable<LoadedRouterConfig>>();\n  onLoadStartListener?: (r: Route) => void;\n  onLoadEndListener?: (r: Route) => void;\n\n  constructor(\n      private injector: Injector,\n      private compiler: Compiler,\n  ) {}\n\n  loadComponent(route: Route): Observable<Type<unknown>> {\n    if (this.componentLoaders.get(route)) {\n      return this.componentLoaders.get(route)!;\n    } else if (route._loadedComponent) {\n      return of(route._loadedComponent);\n    }\n\n    if (this.onLoadStartListener) {\n      this.onLoadStartListener(route);\n    }\n    const loadRunner = wrapIntoObservable(route.loadComponent!())\n                           .pipe(\n                               tap(component => {\n                                 if (this.onLoadEndListener) {\n                                   this.onLoadEndListener(route);\n                                 }\n                                 NG_DEV_MODE && assertStandalone(route.path ?? '', component);\n                                 route._loadedComponent = component;\n                               }),\n                               finalize(() => {\n                                 this.componentLoaders.delete(route);\n                               }),\n                           );\n    // Use custom ConnectableObservable as share in runners pipe increasing the bundle size too much\n    const loader =\n        new ConnectableObservable(loadRunner, () => new Subject<Type<unknown>>()).pipe(refCount());\n    this.componentLoaders.set(route, loader);\n    return loader;\n  }\n\n  loadChildren(parentInjector: Injector, route: Route): Observable<LoadedRouterConfig> {\n    if (this.childrenLoaders.get(route)) {\n      return this.childrenLoaders.get(route)!;\n    } else if (route._loadedRoutes) {\n      return of({routes: route._loadedRoutes, injector: route._loadedInjector});\n    }\n\n    if (this.onLoadStartListener) {\n      this.onLoadStartListener(route);\n    }\n    const moduleFactoryOrRoutes$ = this.loadModuleFactoryOrRoutes(route.loadChildren!);\n    const loadRunner = moduleFactoryOrRoutes$.pipe(\n        map((factoryOrRoutes: NgModuleFactory<any>|Routes) => {\n          if (this.onLoadEndListener) {\n            this.onLoadEndListener(route);\n          }\n          // This injector comes from the `NgModuleRef` when lazy loading an `NgModule`. There is no\n          // injector associated with lazy loading a `Route` array.\n          let injector: EnvironmentInjector|undefined;\n          let rawRoutes: Route[];\n          let requireStandaloneComponents = false;\n          if (Array.isArray(factoryOrRoutes)) {\n            rawRoutes = factoryOrRoutes;\n            requireStandaloneComponents = true;\n          } else {\n            injector = factoryOrRoutes.create(parentInjector).injector;\n            // When loading a module that doesn't provide `RouterModule.forChild()` preloader\n            // will get stuck in an infinite loop. The child module's Injector will look to\n            // its parent `Injector` when it doesn't find any ROUTES so it will return routes\n            // for it's parent module instead.\n            rawRoutes = flatten(injector.get(ROUTES, [], InjectFlags.Self | InjectFlags.Optional));\n          }\n          const routes = rawRoutes.map(standardizeConfig);\n          NG_DEV_MODE && validateConfig(routes, route.path, requireStandaloneComponents);\n          return {routes, injector};\n        }),\n        finalize(() => {\n          this.childrenLoaders.delete(route);\n        }),\n    );\n    // Use custom ConnectableObservable as share in runners pipe increasing the bundle size too much\n    const loader = new ConnectableObservable(loadRunner, () => new Subject<LoadedRouterConfig>())\n                       .pipe(refCount());\n    this.childrenLoaders.set(route, loader);\n    return loader;\n  }\n\n  private loadModuleFactoryOrRoutes(loadChildren: LoadChildren):\n      Observable<NgModuleFactory<any>|Routes> {\n    return wrapIntoObservable(loadChildren()).pipe(mergeMap((t) => {\n      if (t instanceof NgModuleFactory || Array.isArray(t)) {\n        return of(t);\n      } else {\n        return from(this.compiler.compileModuleAsync(t));\n      }\n    }));\n  }\n}\n"]}