Add auth interceptor bootstrap.

src/login/authInterceptor.ts

@@ -0,0 +1,49 @@
+// vim: set tw=80 ts=2 sw=2 sts=2 :
+
+import { Injectable } from '@angular/core';
+import {
+  HttpEvent, HttpInterceptor, HttpHandler, HttpRequest, HttpErrorResponse
+} from '@angular/common/http';
+
+import { Observable} from 'rxjs/Rx';
+import 'rxjs/add/operator/map';
+
+import { Logger } from '@nsalaun/ng-logger';
+
+import { LoginService } from './login.service';
+
+@Injectable()
+export class AuthInterceptor implements HttpInterceptor {
+  constructor(
+    private logger: Logger,
+    private loginService: LoginService,
+  ) {}
+
+  intercept(
+    req: HttpRequest<any>,
+    next: HttpHandler
+  ): Observable<HttpEvent<any>> {
+    this.logger.log('Intercepted request', req, next);
+
+    if(!req.headers.has('Authorization')) {
+      let accessToken: string = this.loginService.accessToken();
+
+      if(accessToken){
+        req = req.clone({
+          headers: req.headers.set('Authorization', `Bearer ${accessToken}`)
+        });
+      }
+    }
+
+    this.logger.log('Request', req);
+
+    return next.handle(req).map(
+      (event: HttpEvent<any>) => event,
+      (error) => {
+        if(error instanceof HttpErrorResponse && error.status === 401) {
+          this.logger.error('Unauthorized', error);
+        }
+      }
+    );
+  }
+}