fix: restrict nested outlet back navigation scope (#54)

Author: edusperoni

README.md

@@ -1,6 +1,6 @@
-# @nativescript/angular 12+
+# @nativescript/angular
 
-For usage with NativeScript for Angular 12+ projects.
+For usage with NativeScript for Angular 12+ (13, etc.) projects.
 
 Clean and setup workspace:
 

packages/angular/README.md

@@ -1,3 +1,3 @@
 # @nativescript/angular
 
-NativeScript for Angular v12+
+For usage with NativeScript for Angular 12+ (13, etc.) projects.

packages/angular/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@nativescript/angular",
-  "version": "13.0.1",
+  "version": "13.0.2-alpha.0",
   "homepage": "https://nativescript.org/",
   "repository": {
     "type": "git",

packages/angular/src/lib/legacy/router/ns-location-strategy.ts

@@ -266,7 +266,7 @@ export class NSLocationStrategy extends LocationStrategy {
   }
 
   // Methods for syncing with page navigation in PageRouterOutlet
-  public _beginBackPageNavigation(frame: Frame) {
+  public _beginBackPageNavigation(frame: Frame, outletKey: string) {
     const outlet: Outlet = this.getOutletByFrame(frame);
 
     if (!outlet || outlet.isPageNavigationBack) {
@@ -279,7 +279,8 @@ export class NSLocationStrategy extends LocationStrategy {
     if (NativeScriptDebug.isLogEnabled()) {
       NativeScriptDebug.routerLog('NSLocationStrategy.startGoBack()');
     }
-    outlet.isPageNavigationBack = true;
+    outlet.setOutletKeyNavigatingBack(outletKey);
+    // outlet.isPageNavigationBack = true;
     // we find all the children and also set their isPageNavigationBack
     this.outlets
       .filter((o) => {

packages/angular/src/lib/legacy/router/ns-location-utils.ts

@@ -61,6 +61,15 @@ export class Outlet {
     this.path = path;
   }
 
+  setOutletKeyNavigatingBack(key: string) {
+    const nests = key.split('/');
+    this.outletKeys
+      .filter((k) => k.split('/').length >= nests.length)
+      .forEach((k) => {
+        this._navigatingBackOutlets.add(k);
+      });
+  }
+
   containsFrame(frame: Frame): boolean {
     return this.frames.indexOf(frame) > -1;
   }

packages/angular/src/lib/legacy/router/page-router-outlet.ts

@@ -327,9 +327,12 @@ export class PageRouterOutlet implements OnDestroy {
     // Add it to the new page
     this.viewUtil.appendChild(page, componentView);
 
+    const topActivatedRoute = findTopActivatedRouteNodeForOutlet(this._activatedRoute.snapshot);
+    const outletKey = this.locationStrategy.getRouteFullPath(topActivatedRoute);
+
     const navigatedFromCallback = (<any>global).Zone.current.wrap((args: NavigatedData) => {
       if (args.isBackNavigation) {
-        this.locationStrategy._beginBackPageNavigation(this.frame);
+        this.locationStrategy._beginBackPageNavigation(this.frame, outletKey);
         this.locationStrategy.back(null, this.frame);
       }
     });

packages/angular/src/lib/legacy/router/router-extensions.ts

@@ -88,7 +88,6 @@ export class RouterExtensions {
 
   // tslint:disable-next-line:max-line-length
   private findOutletsToBack(options?: BackNavigationOptions): { outletsToBack: Array<Outlet>; outlets: Array<string> } {
-    const outletsToBack: Array<Outlet> = [];
     const rootRoute: ActivatedRoute = this.router.routerState.root;
     let outlets = options.outlets;
     let relativeRoute = options.relativeTo || rootRoute;
@@ -102,21 +101,37 @@ export class RouterExtensions {
       relativeRoute = relativeRoute.parent || relativeRoute;
     }
 
-    const routesToMatch = outlets ? relativeRoute.children : [relativeRoute];
     outlets = outlets || [relativeRoute.outlet];
 
-    for (let index = 0; index < routesToMatch.length; index++) {
-      const currentRoute = routesToMatch[index];
-      if (outlets.some((currentOutlet) => currentOutlet === currentRoute.outlet)) {
-        const outlet = this.findOutletByRoute(currentRoute);
+    const outletsToBack = this.findOutletsRecursive([...outlets], relativeRoute);
 
-        if (outlet) {
-          outletsToBack.push(outlet);
-        }
+    return { outletsToBack: outletsToBack, outlets: outlets };
+  }
+
+  // warning, outlets is mutable!
+  private findOutletsRecursive(outlets: string[], route?: ActivatedRoute) {
+    if (!route || outlets.length === 0) {
+      return [];
+    }
+    const outletsToBack = [];
+    if (outlets.some((currentOutlet) => currentOutlet === route.outlet)) {
+      const outlet = this.findOutletByRoute(route);
+      if (outlet) {
+        outlets.splice(outlets.indexOf(route.outlet), 1);
+        outletsToBack.push(outlet);
       }
     }
-
-    return { outletsToBack: outletsToBack, outlets: outlets };
+    if (!route.children) {
+      return outletsToBack;
+    }
+    for (let index = 0; index < route.children.length; index++) {
+      if (outlets.length === 0) {
+        break;
+      }
+      const currentRoute = route.children[index];
+      outletsToBack.push(...this.findOutletsRecursive(outlets, currentRoute));
+    }
+    return outletsToBack;
   }
 
   private findOutletByRoute(currentRoute: ActivatedRoute): Outlet {