dso + i18n breadcrumbs with providers + resolvers

src/app/breadcrumbs/breadcrumb/breadcrumb-config.model.ts

@@ -0,0 +1,7 @@
+import { BreadcrumbsService } from '../../core/breadcrumbs/breadcrumbs.service';
+
+export interface BreadcrumbConfig {
+    provider: BreadcrumbsService;
+    key: string;
+    url?: string;
+}

src/app/breadcrumbs/breadcrumbs.component.ts

@@ -2,8 +2,9 @@ import { Component, OnDestroy, OnInit } from '@angular/core';
 import { ActivatedRoute, NavigationEnd, Router } from '@angular/router';
 import { Breadcrumb } from './breadcrumb/breadcrumb.model';
 import { hasValue, isNotUndefined } from '../shared/empty.util';
-import { filter, map } from 'rxjs/operators';
-import { Subscription } from 'rxjs';
+import { filter, map, switchMap, tap } from 'rxjs/operators';
+import { combineLatest, Observable, Subscription } from 'rxjs';
+import { BreadcrumbConfig } from './breadcrumb/breadcrumb-config.model';
 
 @Component({
   selector: 'ds-breadcrumbs',
@@ -11,8 +12,8 @@ import { Subscription } from 'rxjs';
   styleUrls: ['./breadcrumbs.component.scss']
 })
 export class BreadcrumbsComponent implements OnDestroy {
-  breadcrumbs;
-  showBreadcrumbs;
+  breadcrumbs: Breadcrumb[];
+  showBreadcrumbs: boolean;
   subscription: Subscription;
 
   constructor(
@@ -20,23 +21,32 @@ export class BreadcrumbsComponent implements OnDestroy {
     private router: Router
   ) {
     this.subscription = this.router.events.pipe(
-      filter((e): e is NavigationEnd => e instanceof NavigationEnd)
-    ).subscribe(() => {
-        this.reset();
-        this.resolveBreadcrumb(this.route.root);
+      filter((e): e is NavigationEnd => e instanceof NavigationEnd),
+      tap(() => this.reset()),
+      switchMap(() => this.resolveBreadcrumb(this.route.root))
+    ).subscribe((breadcrumbs) => {
+        this.breadcrumbs = breadcrumbs;
       }
     )
   }
 
-  resolveBreadcrumb(route: ActivatedRoute) {
+  resolveBreadcrumb(route: ActivatedRoute): Observable<Breadcrumb[]> {
     const data = route.snapshot.data;
     if (hasValue(data) && hasValue(data.breadcrumb)) {
-      this.breadcrumbs.push(data.breadcrumb);
+      const { provider, key, url }: BreadcrumbConfig = data.breadcrumb;
+      if (route.children.length > 0) {
+        return combineLatest(provider.getBreadcrumbs(key, url), this.resolveBreadcrumb(route.firstChild))
+          .pipe(map((crumbs) => [].concat.apply([], crumbs)));
+      } else {
+        if (isNotUndefined(data.showBreadcrumbs)) {
+          this.showBreadcrumbs = data.showBreadcrumbs;
+        }
+        return provider.getBreadcrumbs(key, url);
+      }
     }
     if (route.children.length > 0) {
-      this.resolveBreadcrumb(route.firstChild);
-    } else if (isNotUndefined(data.showBreadcrumbs)) {
-      this.showBreadcrumbs = data.showBreadcrumbs;
+
+      return this.resolveBreadcrumb(route.firstChild)
     }
   }
 

src/app/core/breadcrumbs/breadcrumbs.service.ts

@@ -0,0 +1,6 @@
+import { Breadcrumb } from '../../breadcrumbs/breadcrumb/breadcrumb.model';
+import { Observable } from 'rxjs';
+
+export interface BreadcrumbsService {
+  getBreadcrumbs(key: string, url: string): Observable<Breadcrumb[]>;
+}

src/app/core/breadcrumbs/dso-breadcrumb.resolver.ts

@@ -0,0 +1,26 @@
+import { BreadcrumbConfig } from '../../breadcrumbs/breadcrumb/breadcrumb-config.model';
+import { Injectable } from '@angular/core';
+import { ActivatedRouteSnapshot, Resolve, RouterStateSnapshot } from '@angular/router';
+import { DSOBreadcrumbsService } from './dso-breadcrumbs.service';
+
+/**
+ * The class that resolve the BreadcrumbConfig object for a route
+ */
+@Injectable()
+export class DSOBreadcrumbResolver implements Resolve<BreadcrumbConfig> {
+  constructor(private breadcrumbService: DSOBreadcrumbsService) {
+  }
+
+  /**
+   * Method for resolving a site object
+   * @param {ActivatedRouteSnapshot} route The current ActivatedRouteSnapshot
+   * @param {RouterStateSnapshot} state The current RouterStateSnapshot
+   * @returns BreadcrumbConfig object
+   */
+  resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): BreadcrumbConfig {
+    const uuid = route.params.id;
+    const fullPath = route.url.join('');
+    const url = fullPath.substr(0, fullPath.indexOf(uuid)) + uuid;
+    return { provider: this.breadcrumbService, key: uuid, url: url };
+  }
+}

src/app/core/breadcrumbs/dso-breadcrumbs.service.ts

@@ -0,0 +1,9 @@
+import { Breadcrumb } from '../../breadcrumbs/breadcrumb/breadcrumb.model';
+import { BreadcrumbsService } from './breadcrumbs.service';
+import { Observable } from 'rxjs';
+
+export class DSOBreadcrumbsService implements BreadcrumbsService {
+  getBreadcrumbs(key: string, url: string): Observable<Breadcrumb[]> {
+    return undefined;
+  }
+}

src/app/core/breadcrumbs/i18n-breadcrumb.resolver.ts

@@ -0,0 +1,29 @@
+import { BreadcrumbConfig } from '../../breadcrumbs/breadcrumb/breadcrumb-config.model';
+import { Injectable } from '@angular/core';
+import { ActivatedRouteSnapshot, Resolve, RouterStateSnapshot } from '@angular/router';
+import { I18nBreadcrumbsService } from './i18n-breadcrumbs.service';
+import { hasNoValue } from '../../shared/empty.util';
+
+/**
+ * The class that resolve the BreadcrumbConfig object for a route
+ */
+@Injectable()
+export class I18nBreadcrumbResolver implements Resolve<BreadcrumbConfig> {
+  constructor(private breadcrumbService: I18nBreadcrumbsService) {
+  }
+
+  /**
+   * Method for resolving a site object
+   * @param {ActivatedRouteSnapshot} route The current ActivatedRouteSnapshot
+   * @param {RouterStateSnapshot} state The current RouterStateSnapshot
+   * @returns BreadcrumbConfig object
+   */
+  resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): BreadcrumbConfig {
+    const key = route.data.breadcrumbKey;
+    if (hasNoValue(key)) {
+      throw new Error('You provided an i18nBreadcrumbResolver for url \"' + route.url + '\" but no breadcrumbKey in the route\'s data')
+    }
+    const fullPath = route.url.join('');
+    return { provider: this.breadcrumbService, key: key, url: fullPath };
+  }
+}

src/app/core/breadcrumbs/i18n-breadcrumbs.service.ts

@@ -0,0 +1,11 @@
+import { Breadcrumb } from '../../breadcrumbs/breadcrumb/breadcrumb.model';
+import { BreadcrumbsService } from './breadcrumbs.service';
+import { Observable, of as observableOf } from 'rxjs';
+
+export const BREADCRUMB_MESSAGE_PREFIX = 'breadcrumbs.';
+
+export class I18nBreadcrumbsService implements BreadcrumbsService {
+  getBreadcrumbs(key: string, url: string): Observable<Breadcrumb[]> {
+    return observableOf([new Breadcrumb(BREADCRUMB_MESSAGE_PREFIX + key, url)]);
+  }
+}