feat(router): add RouterStateCandidate

modules/@angular/router/src/router_state.ts

@@ -1,9 +1,10 @@
 import { Tree, TreeNode } from './utils/tree';
 import { UrlSegment } from './url_tree';
+import { Route } from './config';
 import { Params, PRIMARY_OUTLET } from './shared';
 import { Observable } from 'rxjs/Observable';
 import { BehaviorSubject } from 'rxjs/BehaviorSubject';
-import { Type } from '@angular/core';
+import { Type, ComponentFactory } from '@angular/core';
 
 /**
  * The state of the router at a particular moment in time.
@@ -35,6 +36,15 @@ export function createEmptyState(rootComponent: Type): RouterState {
   return new RouterState(new TreeNode<ActivatedRoute>(activated, []), emptyQueryParams, fragment);
 }
 
+export function createEmptyStateCandidate(rootComponent: Type): RouterStateCandidate {
+  const emptyUrl = [new UrlSegment("", {}, PRIMARY_OUTLET)];
+  const emptyParams = {};
+  const emptyQueryParams = {};
+  const fragment = "";
+  const activated = new ActivatedRouteCandidate(emptyUrl, emptyParams, PRIMARY_OUTLET, rootComponent, null);
+  return new RouterStateCandidate(new TreeNode<ActivatedRouteCandidate>(activated, []), emptyQueryParams, fragment);
+}
+
 /**
  * Contains the information about a component loaded in an outlet.
  *
@@ -54,3 +64,27 @@ export class ActivatedRoute {
               public outlet: string,
               public component: Type | string) {}
 }
+
+export class ActivatedRouteCandidate {
+  /**
+   * @internal
+   */
+  _resolvedComponentFactory: ComponentFactory<any>;
+  
+  /** @internal **/
+  _routeConfig: Route;
+
+  constructor(public urlSegments: UrlSegment[],
+              public params: Params,
+              public outlet: string,
+              public component: Type | string, 
+              routeConfig: Route) {
+    this._routeConfig = routeConfig;
+  }
+}
+
+export class RouterStateCandidate extends Tree<ActivatedRouteCandidate> {
+  constructor(root: TreeNode<ActivatedRouteCandidate>, public queryParams: Params, public fragment: string) {
+    super(root);
+  }
+}