Features/15 add azure app configuration (#16)

* Adding app config module

* adding app context

* adding app context and feature flag hooks

---------

Co-authored-by: Noah Spannbauer <nspannbauer@sensonix.com>

api/src/app.controller.ts

@@ -1,12 +1,34 @@
-import { Controller, Get } from '@nestjs/common';
+import { Controller, Get, Query } from '@nestjs/common';
 import { AppService } from './app.service';
+import { AppConfigService, AuthService } from '@noahspan/noahspan-modules';
+import { FeatureFlagValue } from '@azure/app-configuration';
 
 @Controller()
 export class AppController {
-  constructor(private readonly appService: AppService) {}
+  constructor(
+    private readonly appConfigService: AppConfigService,
+    private readonly authService: AuthService
+  ) {}
 
-  @Get()
-  getHello(): string {
-    return this.appService.getHello();
+  @Get('featureFlags')
+  async getFeatureFlags(@Query() query: any): Promise<FeatureFlagValue[]> {
+    try {
+      const token: string = await this.authService.getToken(
+        'client_credentials',
+        process.env.CLIENT_ID,
+        process.env.CLIENT_SECRET,
+        'https://azconfig.io'
+      );
+      const featureFlags: FeatureFlagValue[] =
+        await this.appConfigService.getFeatureFlags(
+          token,
+          `${query.key}`,
+          query.label
+        );
+
+      return featureFlags;
+    } catch (error) {
+      console.log(error);
+    }
   }
 }