Do not hardcode SendGrid requirements

server/src/core/app.ts

@@ -107,7 +107,8 @@ export interface AppConfig {
    * Google API Client ID
    */
   googleClientId: string;
-  sgApiKey: string;
+  sendgridApiKey: string;
+  socialReliefEmail: string;
 };
 
 export function loadAppConfigFromEnv(env: { [key: string]: string }): AppConfig {
@@ -135,6 +136,7 @@ export function loadAppConfigFromEnv(env: { [key: string]: string }): AppConfig
     distributionInterval: (env.DISTRIBUTION_INTERVAL && Number(env.DISTRIBUTION_INTERVAL)) || 1,
     statsComputationInterval: (env.STATS_COMPUTATION_INTERVAL && Number(env.STATS_COMPUTATION_INTERVAL)) || 1,
     googleClientId: env.GOOGLE_CLIENT_ID,
-    sgApiKey: env.SENDGRID_API_KEY
+    sendgridApiKey: env.SENDGRID_API_KEY || '',
+    socialReliefEmail: env.SOCIAL_RELIEF_EMAIL || '[email protected]'
   };
 }

server/src/core/bootstrap.ts

@@ -6,7 +6,7 @@ import { createDbConnectionFailedError } from './error';
 import { DonationDistributions } from './distribution';
 import { SystemLocks } from './system-lock';
 import { AtSmsProvider } from './sms';
-import { sgEmailProvider } from './email';
+import { sendgridEmailProvider } from './email';
 import { Invitations } from './invitation';
 import { EventBus } from './event';
 import { UserNotifications } from './user-notification';
@@ -62,8 +62,9 @@ export async function bootstrap(config: AppConfig): Promise<App> {
     apiKey: config.atApiKey,
     sender: config.atSmsSender
   });
-  const emailProvider = new sgEmailProvider({
-    apiKey: config.sgApiKey
+  const emailProvider = new sendgridEmailProvider({
+    apiKey: config.sendgridApiKey,
+    socialReliefEmail: config.socialReliefEmail
   });
 
   // starts listening to events when instantiated

server/src/core/email/index.ts

@@ -1,2 +1,2 @@
 export * from './types';
-export { sgEmailProvider } from './sg-email-provider';
+export { sendgridEmailProvider } from './sendgrid-email-provider';

server/src/core/email/sendgrid-email-provider.ts

@@ -0,0 +1,38 @@
+import { EmailProvider } from './types';
+import { rethrowIfAppError, createEmailDeliveryFailedError, createSendGridApiError } from '../error';
+import sgMail = require('@sendgrid/mail');
+
+export interface sendgridEmailProviderArgs {
+  apiKey: string,
+  socialReliefEmail: string
+};
+
+export class sendgridEmailProvider implements EmailProvider{
+  private socialReliefEmail: string;
+
+  constructor(args: sendgridEmailProviderArgs) {
+    sgMail.setApiKey(args.apiKey);
+    this.socialReliefEmail = args.socialReliefEmail;
+  }
+
+  async sendEmail(to: string, message: string): Promise<void> {
+    try {
+      const res = await sgMail.send({
+        to,
+        from: this.socialReliefEmail,
+        subject: 'Social Relief Notification',
+        text: message,
+      });
+
+      if (res[0].statusCode !== 202) {
+        throw createEmailDeliveryFailedError('Failed to send email');
+      }
+    }
+    catch (e) {
+      console.log(e);
+      rethrowIfAppError(e);
+      throw createSendGridApiError(e.message);
+    }
+  }
+}
+

server/src/core/error.ts

@@ -54,6 +54,7 @@ export type ErrorCode =
   | 'b2cRequestFailed'
   | 'serverError'
   | 'atApiError'
+  | 'sendgridApiError'
   | 'manualPayApiError'
   | 'flutterwaveApiError'
   | 'serverError'
@@ -108,6 +109,10 @@ export function createAtApiError(message: string = messages.ERROR_AT_API_ERROR)
   return createAppError(message, 'atApiError');
 }
 
+export function createSendGridApiError(message: string) {
+  return createAppError(message, 'sendgridApiError');
+}
+
 export function createManualPayApiError(message: string) {
   return createAppError(message, 'manualPayApiError');
 }