panel 2 courier api

app/api/courrier/route.ts

@@ -4,6 +4,25 @@ import { getServerSession } from 'next-auth';
 import { authOptions } from '@/app/api/auth/[...nextauth]/route';
 import { prisma } from '@/lib/prisma';
 
+// Add caching for better performance
+const cache = new Map();
+
+const getCachedEmail = (id: string) => cache.get(id);
+const setCachedEmail = (id: string, email: Email) => cache.set(id, email);
+
+// Add debouncing for folder changes
+const debouncedLoadEmails = debounce((folder: string) => {
+  loadEmails(folder);
+}, 300);
+
+// Add infinite scroll
+const handleScroll = (e: React.UIEvent<HTMLDivElement>) => {
+  const { scrollTop, scrollHeight, clientHeight } = e.currentTarget;
+  if (scrollHeight - scrollTop === clientHeight) {
+    // Load more emails
+  }
+};
+
 export async function GET(request: Request) {
   try {
     const session = await getServerSession(authOptions);
@@ -33,6 +52,7 @@ export async function GET(request: Request) {
     const folder = url.searchParams.get('folder') || 'INBOX';
     const page = parseInt(url.searchParams.get('page') || '1');
     const limit = parseInt(url.searchParams.get('limit') || '20');
+    const preview = url.searchParams.get('preview') === 'true';
 
     // Calculate start and end sequence numbers
     const start = (page - 1) * limit + 1;
@@ -72,11 +92,20 @@ export async function GET(request: Request) {
         const adjustedStart = Math.min(start, mailbox.exists);
         const adjustedEnd = Math.min(end, mailbox.exists);
         
-        // Fetch messages from the current folder
+        // Fetch both metadata and preview content
         const messages = await client.fetch(`${adjustedStart}:${adjustedEnd}`, { 
           envelope: true,
           flags: true,
-          bodyStructure: true
+          bodyStructure: true,
+          // Only fetch preview content if requested
+          ...(preview ? {
+            bodyParts: ['TEXT'],
+            bodyPartsOptions: {
+              TEXT: {
+                maxLength: 1000 // Limit preview length
+              }
+            }
+          } : {})
         });
         
         for await (const message of messages) {
@@ -91,7 +120,9 @@ export async function GET(request: Request) {
             starred: message.flags.has('\\Flagged'),
             folder: mailbox.path,
             hasAttachments: message.bodyStructure?.type === 'multipart',
-            flags: Array.from(message.flags)
+            flags: Array.from(message.flags),
+            // Include preview content if available
+            preview: preview ? message.bodyParts?.TEXT?.toString() : null
           });
         }
       }