feat: add persistent task operations and API

app/api/tasks/route.ts

@@ -0,0 +1,65 @@
+import { NextRequest, NextResponse } from "next/server";
+import {
+  archiveTask,
+  createTask,
+  listTasks,
+  updateTask,
+} from "@/lib/tasks";
+import type { TaskSort } from "@/types/task";
+
+export const runtime = "nodejs";
+
+const sortOptions: TaskSort[] = ["createdAt", "topic", "status", "dueDate"];
+
+function parseSort(value: string | null): TaskSort {
+  if (value && sortOptions.includes(value as TaskSort)) {
+    return value as TaskSort;
+  }
+
+  return "createdAt";
+}
+
+function errorResponse(error: unknown, status = 400) {
+  return NextResponse.json(
+    { error: error instanceof Error ? error.message : "Something went wrong." },
+    { status }
+  );
+}
+
+export function GET(request: NextRequest) {
+  const includeArchived =
+    request.nextUrl.searchParams.get("includeArchived") === "true";
+  const sort = parseSort(request.nextUrl.searchParams.get("sort"));
+  const tasks = listTasks({ includeArchived, sort });
+
+  return NextResponse.json({ tasks });
+}
+
+export async function POST(request: NextRequest) {
+  try {
+    const body = (await request.json()) as Record<string, unknown>;
+    const task = createTask(body);
+
+    return NextResponse.json({ task }, { status: 201 });
+  } catch (error) {
+    return errorResponse(error);
+  }
+}
+
+export async function PATCH(request: NextRequest) {
+  try {
+    const body = (await request.json()) as Record<string, unknown>;
+    const id = Number(body.id);
+
+    if (!Number.isInteger(id) || id <= 0) {
+      throw new Error("A valid task id is required.");
+    }
+
+    const task =
+      body.action === "archive" ? archiveTask(id) : updateTask(id, body);
+
+    return NextResponse.json({ task });
+  } catch (error) {
+    return errorResponse(error);
+  }
+}