Refactor code structure for improved readability and maintainability

app/api/mod/upload-cover/route.ts

@@ -0,0 +1,48 @@
+import { NextResponse } from "next/server"
+import { getServerSession } from "next-auth/next"
+import { authOptions } from "@/lib/auth"
+import { writeFile } from "fs/promises"
+import path from "path"
+import fs from "fs"
+
+export async function POST(req: Request) {
+  try {
+    const session = await getServerSession(authOptions)
+    if (!session || (session.user.role !== "MOD" && session.user.role !== "ADMIN")) {
+      return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
+    }
+
+    const formData = await req.formData()
+    const file = formData.get("file") as File | null
+
+    if (!file) {
+      return NextResponse.json({ error: "No file uploaded" }, { status: 400 })
+    }
+
+    if (!file.type.startsWith("image/")) {
+      return NextResponse.json({ error: "Only image files are allowed" }, { status: 400 })
+    }
+
+    const bytes = await file.arrayBuffer()
+    const buffer = Buffer.from(bytes)
+
+    const uniqueSuffix = Date.now() + "-" + Math.round(Math.random() * 1e9)
+    const ext = path.extname(file.name) || ".jpg"
+    const filename = `cover-${uniqueSuffix}${ext}`
+
+    const uploadDir = path.join(process.cwd(), "public", "uploads", "covers")
+
+    // Ensure directory exists
+    if (!fs.existsSync(uploadDir)) {
+      fs.mkdirSync(uploadDir, { recursive: true })
+    }
+
+    const filepath = path.join(uploadDir, filename)
+    await writeFile(filepath, buffer)
+
+    return NextResponse.json({ url: `/uploads/covers/${filename}` })
+  } catch (error: any) {
+    console.error("Cover upload error:", error)
+    return NextResponse.json({ error: error.message || "Failed to upload cover" }, { status: 500 })
+  }
+}