feat: working like button

src/app/api/like/route.ts

@@ -0,0 +1,61 @@
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+
+export async function PATCH(request: Request) {
+	// todo: rate limit
+
+	const session = await auth();
+	if (!session) return Response.json({ error: "Unauthorized" }, { status: 401 });
+
+	const { miiId } = await request.json();
+	if (!miiId) return Response.json({ error: "Mii ID is required" }, { status: 400 });
+
+	const result = await prisma.$transaction(async (tx) => {
+		const existingLike = await tx.like.findUnique({
+			where: {
+				userId_miiId: {
+					userId: Number(session.user.id),
+					miiId,
+				},
+			},
+		});
+
+		if (existingLike) {
+			// Delete the like if it exists
+			await tx.like.delete({
+				where: {
+					userId_miiId: {
+						userId: Number(session.user.id),
+						miiId,
+					},
+				},
+			});
+
+			const updatedMii = await tx.mii.update({
+				where: { id: miiId },
+				data: { likes: { decrement: 1 } },
+				select: { likes: true },
+			});
+
+			return { liked: false, count: updatedMii.likes };
+		} else {
+			// Create a new like if it doesn't exist
+			await tx.like.create({
+				data: {
+					userId: Number(session.user.id),
+					miiId,
+				},
+			});
+
+			const updatedMii = await tx.mii.update({
+				where: { id: miiId },
+				data: { likes: { increment: 1 } },
+				select: { likes: true },
+			});
+
+			return { liked: true, count: updatedMii.likes };
+		}
+	});
+
+	return Response.json({ success: true, liked: result.liked, count: result.count });
+}