Add logic to send rejection email when setting application to rejected

apps/backend/src/applications/applications.controller.ts

@@ -12,6 +12,8 @@
 import { ApplicationsModel } from './applications.model';
 import { ApplicationStatus } from './applications.model';
 import { NewApplicationInput } from '../dtos/newApplicationsDTO';
+import { ApiQuery, ApiTags } from '@nestjs/swagger';
+
 
 @Controller('applications')
 export class ApplicationsController {
@@ -35,6 +37,12 @@
   }
 
   @Put('editApplication/:appId')
+  @ApiQuery({
+    name: 'applicationStatus',
+    enum: ApplicationStatus,
+    required: true,
+    description: 'The new status to set for the application',
+  })
   public async changeApplicationStatus(
     @Param('appId') appId: number,
     @Query('applicationStatus') appStatus: ApplicationStatus,

apps/backend/src/applications/applications.service.ts

@@ -97,7 +97,24 @@
           emailData,
         );
         console.log('Lambda result: ', lambdaResult);
-      }
+      } else if (appStatus === ApplicationStatus.DENIED) {
+        const user = await this.userService.getUser(application.userId.N);
+        const site = await this.siteService.getSite(application.siteId.N);
+        const name = user.firstName;
+        const email = user.email;
+        const siteName = site.siteName;
+
+        const emailData = {
+          firstName: name,
+          userEmail: email,
+          siteName: siteName,
+        };
+        const lambdaResult = await this.lambdaService.invokeLambda(
+          'giSendApplicationDenied',
+          emailData,
+        );
+        console.log('Lambda result: ', lambdaResult);
+      } 
       return this.mapDynamoDBItemToApplication(updatedApplication);
     } catch (e) {
       throw new Error('Unable to update application status: ' + e);
@@ -228,7 +245,7 @@
   };
 
   private mapDynamoDBItemToApplication = (item: {
     [key: string]: any;
   }): ApplicationsModel => {
     return {
       appId: item['appId'].N,