first commit

app/api/testcase-generator/download/[taskId]/route.ts

@@ -0,0 +1,42 @@
+import { NextRequest } from "next/server";
+import { getTask, getZipPathForTask } from "@/lib/testcase-backend";
+import fs from "fs/promises";
+
+export async function GET(
+  _req: NextRequest,
+  { params }: { params: Promise<{ taskId: string }> }
+) {
+  const { taskId } = await params;
+  if (!taskId) {
+    return Response.json({ error: "缺少 taskId" }, { status: 400 });
+  }
+
+  const task = getTask(taskId);
+  if (!task) {
+    return Response.json({ error: "任务未找到" }, { status: 404 });
+  }
+
+  if (task.status !== "completed") {
+    return Response.json({ error: "任务尚未完成" }, { status: 400 });
+  }
+
+  const zipPath = getZipPathForTask(taskId);
+  if (!zipPath) {
+    return Response.json({ error: "文件未找到" }, { status: 404 });
+  }
+
+  try {
+    const buffer = await fs.readFile(zipPath);
+    const filename = `${task.englishName}_testcases.zip`;
+    return new Response(buffer, {
+      status: 200,
+      headers: {
+        "Content-Type": "application/zip",
+        "Content-Disposition": `attachment; filename="${encodeURIComponent(filename)}"`,
+      },
+    });
+  } catch (e) {
+    console.error("[testcase] download read error:", e);
+    return Response.json({ error: "文件读取失败" }, { status: 500 });
+  }
+}

app/api/testcase-generator/generate/route.ts

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+import { NextRequest } from "next/server";
+import {
+  createTask,
+  getEstimatedTime,
+  findRunningTaskByEnglishName,
+  processTask,
+} from "@/lib/testcase-backend";
+
+export async function POST(req: NextRequest) {
+  try {
+    const body = await req.json();
+    const {
+      title,
+      englishName,
+      description,
+      standardCode,
+      serviceLevel = "standard",
+      testCaseCount: rawCount,
+    } = body;
+
+    if (!title || !englishName || !description || !standardCode) {
+      return Response.json(
+        { success: false, error: "请填写必填字段：题目标题、题目英文名、题目描述、C++标准程序" },
+        { status: 400 }
+      );
+    }
+
+    if (!/^[a-z][a-z0-9_]*$/.test(String(englishName).trim())) {
+      return Response.json(
+        { success: false, error: "题目英文名格式错误：只能包含小写字母、数字和下划线，必须以字母开头" },
+        { status: 400 }
+      );
+    }
+
+    const testCaseCount = Math.min(100, Math.max(1, parseInt(String(rawCount), 10) || 10));
+
+    const existing = findRunningTaskByEnglishName(String(englishName));
+    if (existing) {
+      return Response.json(
+        { success: false, error: "相同英文名的任务正在处理中，请稍后再试或使用不同的英文名" },
+        { status: 409 }
+      );
+    }
+
+    const taskId = "task_" + Date.now() + "_" + Math.random().toString(36).slice(2, 11);
+    createTask(taskId, {
+      title: String(title).trim(),
+      englishName: String(englishName).trim().toLowerCase(),
+      description: String(description).trim(),
+      standardCode: String(standardCode).trim(),
+      testCaseCount,
+      serviceLevel: String(serviceLevel),
+    });
+
+    setImmediate(() => {
+      processTask(taskId).catch((err) => {
+        console.error(`[testcase] processTask error:`, err);
+      });
+    });
+
+    const estimated_time = getEstimatedTime(String(serviceLevel), testCaseCount);
+    return Response.json({
+      success: true,
+      task_id: taskId,
+      message: "任务已创建，正在处理中...",
+      estimated_time,
+    });
+  } catch (e) {
+    const message = e instanceof Error ? e.message : String(e);
+    return Response.json(
+      { success: false, error: "创建任务时发生错误，请重试：" + message },
+      { status: 500 }
+    );
+  }
+}

app/api/testcase-generator/task_status/[taskId]/route.ts

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+import { NextRequest } from "next/server";
+import { getTask, getEstimatedTime } from "@/lib/testcase-backend";
+
+export async function GET(
+  _req: NextRequest,
+  { params }: { params: Promise<{ taskId: string }> }
+) {
+  const { taskId } = await params;
+  if (!taskId) {
+    return Response.json({ error: "缺少 taskId" }, { status: 400 });
+  }
+
+  const task = getTask(taskId);
+  if (!task) {
+    return Response.json({ error: "任务未找到" }, { status: 404 });
+  }
+
+  const runningTime = Math.floor((Date.now() - task.createdAt.getTime()) / 1000);
+  const estimated_time = getEstimatedTime(task.serviceLevel, task.testCaseCount);
+
+  return Response.json({
+    task_id: task.id,
+    status: task.status,
+    progress: task.progress,
+    title: task.title,
+    english_name: task.englishName,
+    test_case_count: task.testCaseCount,
+    generated_cases: task.generatedCases ?? 0,
+    service_level: task.serviceLevel,
+    created_at: task.createdAt,
+    updated_at: task.updatedAt,
+    running_time: runningTime,
+    estimated_time,
+    error_message: task.errorMessage ?? undefined,
+    currentMessage: task.currentMessage ?? undefined,
+  });
+}