feat: initialize inventory management application with Prisma schema, QR scanning, and UI components

app/api/inventory/route.js

@@ -0,0 +1,86 @@
+import { NextResponse } from "next/server";
+import { prisma } from "@/lib/prisma";
+
+// GET all inventory items
+export async function GET() {
+  try {
+    const items = await prisma.inventoryItem.findMany({
+      orderBy: { createdAt: "desc" },
+    });
+    return NextResponse.json(items);
+  } catch (error) {
+    return NextResponse.json({ error: "Failed to fetch inventory" }, { status: 500 });
+  }
+}
+
+// POST a new item (or update if exists)
+export async function POST(req) {
+  try {
+    const body = await req.json();
+    const { qrCodeId, name, quantity, price, category, description } = body;
+
+    const newItem = await prisma.inventoryItem.upsert({
+      where: { qrCodeId },
+      update: {
+        name,
+        quantity: quantity || 0,
+        price: price || 0.0,
+        category: category || "",
+        description: description || "",
+      },
+      create: {
+        qrCodeId,
+        name,
+        quantity: quantity || 0,
+        price: price || 0.0,
+        category: category || "",
+        description: description || "",
+      },
+    });
+
+    return NextResponse.json(newItem, { status: 201 });
+  } catch (error) {
+    return NextResponse.json({ error: "Failed to create or update item", details: error.message }, { status: 500 });
+  }
+}
+
+// PUT (Update) an existing item
+export async function PUT(req) {
+  try {
+    const body = await req.json();
+    const { id, ...updateData } = body;
+
+    if (!id) {
+      return NextResponse.json({ error: "Item ID is required" }, { status: 400 });
+    }
+
+    const updatedItem = await prisma.inventoryItem.update({
+      where: { id },
+      data: updateData,
+    });
+
+    return NextResponse.json(updatedItem, { status: 200 });
+  } catch (error) {
+    return NextResponse.json({ error: "Failed to update item", details: error.message }, { status: 500 });
+  }
+}
+
+// DELETE an item
+export async function DELETE(req) {
+  try {
+    const { searchParams } = new URL(req.url);
+    const id = searchParams.get("id");
+
+    if (!id) {
+      return NextResponse.json({ error: "Item ID is required" }, { status: 400 });
+    }
+
+    await prisma.inventoryItem.delete({
+      where: { id },
+    });
+
+    return NextResponse.json({ message: "Item deleted successfully" }, { status: 200 });
+  } catch (error) {
+    return NextResponse.json({ error: "Failed to delete item", details: error.message }, { status: 500 });
+  }
+}