From 20c463e97cfd32266172bbdc5016a71621f12704 Mon Sep 17 00:00:00 2001
From: Jason Aden <jasonaden@google.com>
Date: Wed, 30 May 2018 11:20:48 -0700
Subject: [PATCH] feat(router): add navigation execution context info to
 activation hooks (#24204)

This change adds to internal API hooks (undocumented API) for
`before/afterPreactivation`. The immediate need for this API is to
allow applications to build support for marshalling navigation between
a web worker and the main application.

Fixes #24202

PR Close #24204
---
 packages/router/src/router.ts | 32 ++++++++++++++++++++++++++++----
 1 file changed, 28 insertions(+), 4 deletions(-)

diff --git a/packages/router/src/router.ts b/packages/router/src/router.ts
index 1cf291a4b9..bdee78a836 100644
--- a/packages/router/src/router.ts
+++ b/packages/router/src/router.ts
@@ -177,12 +177,24 @@ type NavigationParams = {
 /**
  * @internal
  */
-export type RouterHook = (snapshot: RouterStateSnapshot) => Observable<void>;
+export type RouterHook = (snapshot: RouterStateSnapshot, runExtras: {
+  appliedUrlTree: UrlTree,
+  rawUrlTree: UrlTree,
+  skipLocationChange: boolean,
+  replaceUrl: boolean,
+  navigationId: number
+}) => Observable<void>;
 
 /**
  * @internal
  */
-function defaultRouterHook(snapshot: RouterStateSnapshot): Observable<void> {
+function defaultRouterHook(snapshot: RouterStateSnapshot, runExtras: {
+  appliedUrlTree: UrlTree,
+  rawUrlTree: UrlTree,
+  skipLocationChange: boolean,
+  replaceUrl: boolean,
+  navigationId: number
+}): Observable<void> {
   return of (null) as any;
 }
 
@@ -645,7 +657,13 @@ export class Router {
       const beforePreactivationDone$ =
           urlAndSnapshot$.pipe(mergeMap((p): Observable<NavStreamValue> => {
             if (typeof p === 'boolean') return of (p);
-            return this.hooks.beforePreactivation(p.snapshot).pipe(map(() => p));
+            return this.hooks
+                .beforePreactivation(p.snapshot, {
+                  navigationId: id,
+                  appliedUrlTree: url,
+                  rawUrlTree: rawUrl, skipLocationChange, replaceUrl,
+                })
+                .pipe(map(() => p));
           }));
 
       // run preactivation: guards and data resolvers
@@ -698,7 +716,13 @@ export class Router {
       const preactivationDone$ =
           preactivationResolveData$.pipe(mergeMap((p): Observable<NavStreamValue> => {
             if (typeof p === 'boolean' || this.navigationId !== id) return of (false);
-            return this.hooks.afterPreactivation(p.snapshot).pipe(map(() => p));
+            return this.hooks
+                .afterPreactivation(p.snapshot, {
+                  navigationId: id,
+                  appliedUrlTree: url,
+                  rawUrlTree: rawUrl, skipLocationChange, replaceUrl,
+                })
+                .pipe(map(() => p));
           }));