fix: added sender retry and handled fail

app/api/cron/route.ts

@@ -2,7 +2,7 @@ import { NextResponse } from 'next/server';
 import { z } from 'zod';
 import NewsletterTemplate from '../../../components/emails/newsletter';
 import prisma from '../../../prisma/prisma';
-import { sendEmail } from '../../../utils/sender';
+import { sender } from '../../../utils/sender';
 import { NewsDatabaseSchema, NewsSchema } from '../../../utils/types';
 import { singleNews, topNews } from '../../../utils/urls';
 
@@ -69,11 +69,17 @@ export async function GET(request: Request) {
     .filter((item): item is z.infer<typeof NewsSchema> => item !== undefined)
     .sort((a, b) => b.score - a.score);
 
-  await sendEmail(
+  const sent = await sender(
     users.map(user => user.email),
     NewsletterTemplate(validRankedNews)
   );
 
+  if (!sent) {
+    return new NextResponse('Internal server error', {
+      status: 500
+    });
+  }
+
   return new NextResponse(`Newsletter sent to ${users.length} addresses.`, {
     status: 200
   });

app/api/subscribe/route.ts

@@ -3,7 +3,7 @@ import { z } from 'zod';
 import SubscribeTemplate from '../../../components/emails/subscribe';
 import prisma from '../../../prisma/prisma';
 import { ApiResponse } from '../../../utils/apiResponse';
-import { sendEmail } from '../../../utils/sender';
+import { sender } from '../../../utils/sender';
 import { ResponseSchema, SubscribeFormSchema } from '../../../utils/types';
 
 export const dynamic = 'force-dynamic'; // defaults to force-static
@@ -60,7 +60,11 @@ export async function POST(request: Request) {
     }
   });
 
-  await sendEmail([email], SubscribeTemplate(code));
+  const sent = await sender([email], SubscribeTemplate(code));
+
+  if (!sent) {
+    return ApiResponse(500, 'Internal server error');
+  }
 
   const message: z.infer<typeof ResponseSchema> = {
     message: `Thank you! You will now receive an email to ${email} to confirm the subscription.`

app/api/unsubscribe/route.ts

@@ -2,7 +2,7 @@ import { z } from 'zod';
 import UnsubscribeTemplate from '../../../components/emails/unsubscribe';
 import prisma from '../../../prisma/prisma';
 import { ApiResponse } from '../../../utils/apiResponse';
-import { sendEmail } from '../../../utils/sender';
+import { sender } from '../../../utils/sender';
 import { ResponseSchema, UnsubscribeFormSchema } from '../../../utils/types';
 
 export const dynamic = 'force-dynamic'; // defaults to force-static
@@ -31,7 +31,11 @@ export async function POST(request: Request) {
       }
     });
 
-    await sendEmail([email], UnsubscribeTemplate());
+    const sent = await sender([email], UnsubscribeTemplate());
+
+    if (!sent) {
+      return ApiResponse(500, 'Internal server error');
+    }
   }
 
   const message: z.infer<typeof ResponseSchema> = {