Add sign in redirect, closes #24

Author: neroniaky

README.md

@@ -85,7 +85,10 @@ Configuration options can be passed as `Angular2TokenOptions` via `.init()`.
 constructor(private _tokenService: Angular2TokenService) {
     this._tokenService.init({
         apiPath:                    null,
+
         signInPath:                 'auth/sign_in',
+        signInRedirect:             null,
+
         signOutPath:                'auth/sign_out',
         validateTokenPath:          'auth/validate_token',
 
@@ -106,6 +109,7 @@ constructor(private _tokenService: Angular2TokenService) {
 | ----------------------------------- | ----------------------------------------------- |
 | `apiPath?: string`                  | Sets base path all operations are based on      |
 | `signInPath?: string`               | Sets path for sign in                           |
+| `signInRedirect?: string`           | Sets redirect path for failed CanActivate       |
 | `signOutPath?: string`              | Sets path for sign out                          |
 | `validateTokenPath?: string`        | Sets path for token validation                  |
 | `registerAccountPath?: string`      | Sets path for account registration              |
@@ -285,8 +289,9 @@ this._tokenService.currentUser; // ADMIN
 ```
 
 ## Route Guards
-Angular2-Token implements the `CanActivate` interface, so it can directly be used
-as a route guard. It currently does not distinguish between user types.
+Angular2-Token implements the `CanActivate` interface, so it can directly be used as a route guard. 
+If the `signInRedirect` option is set the user will be redirected on a failed (=false) CanActivate using `Router.navigate()`.
+It currently does not distinguish between user types.
 
 #### Example:
 ```javascript

src/angular2-token.model.ts

@@ -17,7 +17,10 @@ export interface OAuthPaths {
 
 export interface Angular2TokenOptions {
     apiPath?:                   string;
+
     signInPath?:                string;
+    signInRedirect?:            string;
+
     signOutPath?:               string;
     validateTokenPath?:         string;
 

src/angular2-token.service.ts

@@ -8,7 +8,7 @@ import {
     RequestMethod,
     RequestOptions
 } from '@angular/http';
-import { ActivatedRoute }   from '@angular/router';
+import { ActivatedRoute, Router }   from '@angular/router';
 import { Observable }       from 'rxjs/Observable';
 import 'rxjs/add/operator/share';
 
@@ -39,22 +39,32 @@ export class Angular2TokenService implements CanActivate {
 
     constructor(
         private _http: Http,
-        private _activatedRoute: ActivatedRoute
+        private _activatedRoute: ActivatedRoute,
+        private _router: Router
     ) { }
 
     canActivate() {
         if (this._currentUserData)
             return true;
-        else
+        else {
+
+            // Redirect user to sign in if signInRedirect is set
+            if(this._options.signInRedirect)
+                this._router.navigate([this._options.signInRedirect]);
+            
             return false;
+        }         
     }
 
     // Inital configuration
     init(options?: Angular2TokenOptions) {
 
         let defaultOptions: Angular2TokenOptions = {
             apiPath:                    null,
+
             signInPath:                 'auth/sign_in',
+            signInRedirect:             null,
+
             signOutPath:                'auth/sign_out',
             validateTokenPath:          'auth/validate_token',