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);
+    }
   }
 }

api/src/app.module.ts

@@ -1,9 +1,17 @@
 import { Module } from '@nestjs/common';
 import { AppController } from './app.controller';
 import { AppService } from './app.service';
+import { AppConfigModule, AuthModule } from '@noahspan/noahspan-modules';
 
 @Module({
-  imports: [],
+  imports: [
+    AppConfigModule.register({
+      url: process.env.APP_CONFIG_URL
+    }),
+    AuthModule.register({
+      tenantId: process.env.TENANT_ID
+    })
+  ],
   controllers: [AppController],
   providers: [AppService]
 })