refactor: replace direct Prisma calls with service layer methods for banking operations

app/api/banking/folders/route.ts

@@ -1,20 +1,11 @@
 import { NextResponse } from "next/server"
-import { prisma } from "@/lib/prisma"
+import { folderService, FolderNotFoundError } from "@/services/folder.service"
 import type { Folder } from "@/lib/types"
 
 export async function POST(request: Request) {
   try {
-    const folder: Omit<Folder, "id"> = await request.json()
-
-    const created = await prisma.folder.create({
-      data: {
-        name: folder.name,
-        parentId: folder.parentId,
-        color: folder.color,
-        icon: folder.icon,
-      },
-    })
-
+    const data: Omit<Folder, "id"> = await request.json()
+    const created = await folderService.create(data)
     return NextResponse.json(created)
   } catch (error) {
     console.error("Error creating folder:", error)
@@ -25,17 +16,7 @@ export async function POST(request: Request) {
 export async function PUT(request: Request) {
   try {
     const folder: Folder = await request.json()
-
-    const updated = await prisma.folder.update({
-      where: { id: folder.id },
-      data: {
-        name: folder.name,
-        parentId: folder.parentId,
-        color: folder.color,
-        icon: folder.icon,
-      },
-    })
-
+    const updated = await folderService.update(folder.id, folder)
     return NextResponse.json(updated)
   } catch (error) {
     console.error("Error updating folder:", error)
@@ -52,43 +33,13 @@ export async function DELETE(request: Request) {
       return NextResponse.json({ error: "Folder ID is required" }, { status: 400 })
     }
 
-    const folder = await prisma.folder.findUnique({
-      where: { id },
-      include: { children: true },
-    })
-
-    if (!folder) {
-      return NextResponse.json({ error: "Folder not found" }, { status: 404 })
-    }
-
-    // Move accounts to root (null)
-    await prisma.account.updateMany({
-      where: { folderId: id },
-      data: { folderId: null },
-    })
-
-    // Move subfolders to parent
-    if (folder.parentId) {
-      await prisma.folder.updateMany({
-        where: { parentId: id },
-        data: { parentId: folder.parentId },
-      })
-    } else {
-      // If no parent, move to null (root)
-      await prisma.folder.updateMany({
-        where: { parentId: id },
-        data: { parentId: null },
-      })
-    }
-
-    await prisma.folder.delete({
-      where: { id },
-    })
-
+    await folderService.delete(id)
     return NextResponse.json({ success: true })
   } catch (error) {
+    if (error instanceof FolderNotFoundError) {
+      return NextResponse.json({ error: "Folder not found" }, { status: 404 })
+    }
     console.error("Error deleting folder:", error)
     return NextResponse.json({ error: "Failed to delete folder" }, { status: 500 })
   }
 }
-