From b424e0fb87253a827707064afc94f42aa2e2f560 Mon Sep 17 00:00:00 2001
From: Rodrigo Ramalho <hodrigohamalho@gmail.com>
Date: Fri, 3 May 2019 02:21:12 -0300
Subject: [PATCH] injecting key-user header in every request to services

---
 README.md                                     |  5 +++
 src/app/interceptor/httpconfig.interceptor.ts | 35 +++++++++++++++++++
 src/environments/environment.ts               | 16 ++++++++-
 3 files changed, 55 insertions(+), 1 deletion(-)
 create mode 100644 src/app/interceptor/httpconfig.interceptor.ts

diff --git a/README.md b/README.md
index 7e5589c..b78d68e 100644
--- a/README.md
+++ b/README.md
@@ -27,3 +27,8 @@ Run `ng e2e` to execute the end-to-end tests via [Protractor](http://www.protrac
 ## Further help
 
 To get more help on the Angular CLI use `ng help` or go check out the [Angular CLI README](https://github.com/angular/angular-cli/blob/master/README.md).
+
+## API Gateway 
+
+To every request for mission/incident and responder services a user-key header is being added to the request.
+To disable it, just open environment.ts and set the **isGatewayEnabled** to false.
diff --git a/src/app/interceptor/httpconfig.interceptor.ts b/src/app/interceptor/httpconfig.interceptor.ts
new file mode 100644
index 0000000..2b20539
--- /dev/null
+++ b/src/app/interceptor/httpconfig.interceptor.ts
@@ -0,0 +1,35 @@
+import { Injectable } from '@angular/core';
+import {
+    HttpInterceptor,
+    HttpRequest,
+    HttpResponse,
+    HttpHandler,
+    HttpEvent,
+    
+} from '@angular/common/http';
+
+import { Observable, throwError } from 'rxjs';
+import { map, catchError } from 'rxjs/operators';
+import { environment } from '../../environments/environment';
+
+@Injectable() export class HttpConfigInterceptor implements HttpInterceptor { 
+
+    intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
+        if(environment.isGatewayEnabled){
+            let service = request.url.substr(0, request.url.indexOf("/"));
+            if (environment.servicesNames.includes(service)){
+                request = request.clone({ 
+                    setHeaders: {
+                        "user-key": environment.service.get(service)
+                    }
+                });
+            }
+        }
+
+        return next.handle(request).pipe(
+            map((event: HttpEvent<any>) => {
+                return event;
+            }));
+    }
+
+}
diff --git a/src/environments/environment.ts b/src/environments/environment.ts
index 012182e..3f0c70a 100644
--- a/src/environments/environment.ts
+++ b/src/environments/environment.ts
@@ -2,8 +2,22 @@
 // `ng build ---prod` replaces `environment.ts` with `environment.prod.ts`.
 // The list of file replacements can be found in `angular.json`.
 
+export var servicesMap = new Map();
+servicesMap.set('incident-service', 'd3fa642d9b83043af5b92805ebdaf7d2');
+servicesMap.set('alert-service', 'xxx'),
+servicesMap.set('responder-service', '884e490b9c52e6c6354b8c6e7cb8ee14'),
+servicesMap.set('mission-service', '3865ce20837908ebae41c32a8ae3e829');
+
 export const environment = {
-  production: false
+  production: false,
+  isGatewayEnabled: true,
+  service: servicesMap,
+  servicesNames: [
+    'incident-service',
+    'alert-service',
+    'responder-service',
+    'mission-service',
+  ]
 };
 
 /*