feat(dashboard): add full-page rich comparison between two users

Author: code-with-abhi-i5

app/api/compare/route.ts

@@ -0,0 +1,54 @@
+import { NextResponse } from 'next/server';
+import { getFullDashboardData } from '@/lib/github';
+
+export const revalidate = 3600;
+
+export async function GET(request: Request) {
+  const { searchParams } = new URL(request.url);
+  const user1 = searchParams.get('user1');
+  const user2 = searchParams.get('user2');
+
+  if (!user1 || !user2) {
+    return NextResponse.json(
+      { error: 'Both user1 and user2 query parameters are required.' },
+      { status: 400 }
+    );
+  }
+
+  if (user1.toLowerCase() === user2.toLowerCase()) {
+    return NextResponse.json({ error: 'Cannot compare a user with themselves.' }, { status: 400 });
+  }
+
+  try {
+    const [result1, result2] = await Promise.allSettled([
+      getFullDashboardData(user1),
+      getFullDashboardData(user2),
+    ]);
+
+    if (result1.status === 'rejected') {
+      return NextResponse.json(
+        {
+          error: `Failed to fetch data for "${user1}": ${result1.reason?.message || 'Unknown error'}`,
+        },
+        { status: 404 }
+      );
+    }
+
+    if (result2.status === 'rejected') {
+      return NextResponse.json(
+        {
+          error: `Failed to fetch data for "${user2}": ${result2.reason?.message || 'Unknown error'}`,
+        },
+        { status: 404 }
+      );
+    }
+
+    return NextResponse.json({
+      user1: result1.value,
+      user2: result2.value,
+    });
+  } catch (error) {
+    const message = error instanceof Error ? error.message : 'Internal server error';
+    return NextResponse.json({ error: message }, { status: 500 });
+  }
+}