refactor: improve news and email handling, style, folder structure (#16)

utils/sender.ts

@@ -1,43 +1,61 @@
 import { Resend } from 'resend';
 
-type EmailTemplate = {
+interface EmailTemplate {
   subject: string;
   template: JSX.Element;
-};
+}
 
 export async function sender(
-  to: string[],
+  recipients: string[],
   { subject, template }: EmailTemplate
 ) {
+  if (recipients.length === 0) {
+    console.info(`${subject} email skipped for having zero recipients`);
+    return true;
+  }
+
   const resend = new Resend(process.env.RESEND_KEY);
 
   try {
-    const { error } = await resend.batch.send(
-      to.map(t => {
-        return {
-          from: process.env.RESEND_FROM!,
-          to: t,
-          subject,
-          react: template,
-          headers: {
-            'List-Unsubscribe': `<${process.env.HOME_URL}/unsubscribe>`
-          }
-        };
-      })
-    );
+    let response;
+
+    if (recipients.length == 1) {
+      response = await resend.emails.send({
+        from: process.env.RESEND_FROM!,
+        to: recipients[0],
+        subject,
+        react: template,
+        headers: {
+          'List-Unsubscribe': `<${process.env.HOME_URL}/unsubscribe>`
+        }
+      });
+    } else {
+      response = await resend.batch.send(
+        recipients.map(recipient => {
+          return {
+            from: process.env.RESEND_FROM!,
+            to: recipient,
+            subject,
+            react: template,
+            headers: {
+              'List-Unsubscribe': `<${process.env.HOME_URL}/unsubscribe>`
+            }
+          };
+        })
+      );
+    }
+
+    const { error } = response;
 
     if (error) {
-      console.log(error);
-
+      console.error(error);
       return false;
     }
-  } catch (error) {
-    console.log(error);
 
+    console.info(`${subject} email sent to ${recipients.length} recipients`);
+    return true;
+  } catch (error) {
+    console.error(error);
     return false;
   }
-
-  console.log('Email sent', subject, to.length);
-
-  return true;
 }