Refactor code structure for improved readability and maintainability

app/api/mod/truyen/bulk/route.ts

@@ -0,0 +1,70 @@
+import { NextResponse } from "next/server"
+import { getServerSession } from "next-auth/next"
+import { authOptions } from "@/lib/auth"
+import { prisma } from "@/lib/prisma"
+import connectToMongoDB from "@/lib/mongoose"
+import { Chapter } from "@/lib/models/chapter"
+import { deleteR2ObjectByUrl } from "@/lib/r2"
+
+function normalizeIds(value: any): string[] {
+  if (!Array.isArray(value)) return []
+  return value.filter((item) => typeof item === "string" && item.trim()).map((item) => item.trim())
+}
+
+export async function POST(req: Request) {
+  const session = await getServerSession(authOptions)
+  if (!session || (session.user.role !== "MOD" && session.user.role !== "ADMIN")) {
+    return NextResponse.json({ error: "Unauthorized" }, { status: 401 })
+  }
+
+  try {
+    const body = await req.json()
+    const action = typeof body?.action === "string" ? body.action : ""
+    const ids = normalizeIds(body?.ids)
+
+    if (ids.length === 0) {
+      return NextResponse.json({ error: "Danh sách truyện trống" }, { status: 400 })
+    }
+
+    const accessibleNovels = await prisma.novel.findMany({
+      where: session.user.role === "ADMIN"
+        ? { id: { in: ids } }
+        : {
+            id: { in: ids },
+            OR: [
+              { uploaderId: session.user.id },
+              { uploaderId: null },
+            ],
+          },
+      select: {
+        id: true,
+        coverUrl: true,
+      },
+    })
+
+    if (accessibleNovels.length === 0) {
+      return NextResponse.json({ error: "Không có truyện hợp lệ để thao tác" }, { status: 404 })
+    }
+
+    const accessibleIds = accessibleNovels.map((novel) => novel.id)
+
+    if (action === "delete") {
+      await connectToMongoDB()
+      await Chapter.deleteMany({ novelId: { $in: accessibleIds } })
+
+      await prisma.novel.deleteMany({
+        where: { id: { in: accessibleIds } },
+      })
+
+      await Promise.all(
+        accessibleNovels.map((novel) => deleteR2ObjectByUrl(novel.coverUrl).catch(() => {}))
+      )
+
+      return NextResponse.json({ success: true, deletedCount: accessibleIds.length })
+    }
+
+    return NextResponse.json({ error: "Chỉ hỗ trợ xóa hàng loạt" }, { status: 400 })
+  } catch {
+    return NextResponse.json({ error: "Bulk operation failed" }, { status: 500 })
+  }
+}