feat: rebuild CSP practice workflow, UX and automation
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#include "csp/controllers/meta_controller.h"
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#include "csp/app_state.h"
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#include "csp/domain/enum_strings.h"
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#include "csp/domain/json.h"
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#include "csp/services/problem_gen_runner.h"
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#include "csp/services/problem_service.h"
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#include "csp/services/submission_service.h"
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#include <algorithm>
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#include <exception>
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#include <string>
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namespace csp::controllers {
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namespace {
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drogon::HttpResponsePtr JsonError(drogon::HttpStatusCode code,
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const std::string& msg) {
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Json::Value j;
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j["ok"] = false;
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j["error"] = msg;
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auto resp = drogon::HttpResponse::newHttpJsonResponse(j);
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resp->setStatusCode(code);
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return resp;
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}
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Json::Value BuildOpenApiSpec() {
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Json::Value root;
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root["openapi"] = "3.1.0";
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root["info"]["title"] = "CSP Platform API";
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root["info"]["version"] = "1.0.0";
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root["info"]["description"] =
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"CSP 训练平台接口文档，含认证、题库、评测、导入、MCP。";
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root["servers"][0]["url"] = "/";
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auto& paths = root["paths"];
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paths["/api/health"]["get"]["summary"] = "健康检查";
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paths["/api/health"]["get"]["responses"]["200"]["description"] = "OK";
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paths["/api/v1/auth/login"]["post"]["summary"] = "登录";
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paths["/api/v1/auth/register"]["post"]["summary"] = "注册";
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paths["/api/v1/problems"]["get"]["summary"] = "题库列表";
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paths["/api/v1/problems/{id}"]["get"]["summary"] = "题目详情";
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paths["/api/v1/problems/{id}/submit"]["post"]["summary"] = "提交评测";
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paths["/api/v1/problems/{id}/draft"]["get"]["summary"] = "读取代码草稿";
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paths["/api/v1/problems/{id}/draft"]["put"]["summary"] = "保存代码草稿";
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paths["/api/v1/problems/{id}/solutions"]["get"]["summary"] = "题解列表/任务状态";
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paths["/api/v1/problems/{id}/solutions/generate"]["post"]["summary"] =
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"异步生成题解";
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paths["/api/v1/run/cpp"]["post"]["summary"] = "C++ 试运行";
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paths["/api/v1/submissions"]["get"]["summary"] = "提交记录";
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paths["/api/v1/submissions/{id}"]["get"]["summary"] = "提交详情";
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paths["/api/v1/import/jobs/latest"]["get"]["summary"] = "最新导入任务";
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paths["/api/v1/import/jobs/run"]["post"]["summary"] = "触发导入任务";
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paths["/api/v1/problem-gen/status"]["get"]["summary"] = "CSP-J 生成任务状态";
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paths["/api/v1/problem-gen/run"]["post"]["summary"] = "触发生成新题（RAG+去重）";
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paths["/api/v1/mcp"]["post"]["summary"] = "MCP JSON-RPC 入口";
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auto& components = root["components"];
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components["securitySchemes"]["bearerAuth"]["type"] = "http";
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components["securitySchemes"]["bearerAuth"]["scheme"] = "bearer";
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components["securitySchemes"]["bearerAuth"]["bearerFormat"] = "JWT";
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return root;
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}
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Json::Value BuildMcpError(const Json::Value& id,
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int code,
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const std::string& message) {
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Json::Value out;
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out["jsonrpc"] = "2.0";
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out["id"] = id;
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out["error"]["code"] = code;
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out["error"]["message"] = message;
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return out;
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}
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Json::Value BuildMcpOk(const Json::Value& id, const Json::Value& result) {
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Json::Value out;
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out["jsonrpc"] = "2.0";
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out["id"] = id;
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out["result"] = result;
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return out;
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}
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Json::Value McpToolsList() {
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Json::Value tools(Json::arrayValue);
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Json::Value t1;
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t1["name"] = "health";
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t1["description"] = "Get backend health";
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tools.append(t1);
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Json::Value t2;
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t2["name"] = "list_problems";
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t2["description"] = "List problems with filters";
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tools.append(t2);
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Json::Value t3;
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t3["name"] = "get_problem";
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t3["description"] = "Get problem by id";
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tools.append(t3);
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Json::Value t4;
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t4["name"] = "run_cpp";
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t4["description"] = "Run C++ code with input";
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tools.append(t4);
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Json::Value t5;
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t5["name"] = "generate_cspj_problem";
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t5["description"] = "Trigger RAG-based CSP-J problem generation";
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tools.append(t5);
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return tools;
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}
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} // namespace
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void MetaController::openapi(
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const drogon::HttpRequestPtr& /*req*/,
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std::function<void(const drogon::HttpResponsePtr&)>&& cb) {
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auto resp = drogon::HttpResponse::newHttpJsonResponse(BuildOpenApiSpec());
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resp->setStatusCode(drogon::k200OK);
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cb(resp);
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}
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void MetaController::mcp(
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const drogon::HttpRequestPtr& req,
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std::function<void(const drogon::HttpResponsePtr&)>&& cb) {
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try {
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const auto json = req->getJsonObject();
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if (!json) {
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auto resp = drogon::HttpResponse::newHttpJsonResponse(
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BuildMcpError(Json::nullValue, -32700, "body must be json"));
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resp->setStatusCode(drogon::k400BadRequest);
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cb(resp);
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return;
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}
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const Json::Value id = (*json).isMember("id") ? (*json)["id"] : Json::nullValue;
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const std::string method = (*json).get("method", "").asString();
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const Json::Value params = (*json).isMember("params") ? (*json)["params"] : Json::Value();
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if (method == "initialize") {
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Json::Value result;
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result["server_name"] = "csp-platform-mcp";
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result["server_version"] = "1.0.0";
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result["capabilities"]["tools"] = true;
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auto resp = drogon::HttpResponse::newHttpJsonResponse(BuildMcpOk(id, result));
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cb(resp);
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return;
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}
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if (method == "tools/list") {
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Json::Value result;
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result["tools"] = McpToolsList();
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auto resp = drogon::HttpResponse::newHttpJsonResponse(BuildMcpOk(id, result));
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cb(resp);
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return;
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}
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if (method != "tools/call") {
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auto resp = drogon::HttpResponse::newHttpJsonResponse(
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BuildMcpError(id, -32601, "method not found"));
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cb(resp);
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return;
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}
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const std::string tool_name = params.get("name", "").asString();
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const Json::Value args = params.isMember("arguments") ? params["arguments"] : Json::Value();
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if (tool_name == "health") {
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Json::Value result;
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result["ok"] = true;
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result["service"] = "csp-backend";
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auto resp = drogon::HttpResponse::newHttpJsonResponse(BuildMcpOk(id, result));
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cb(resp);
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return;
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}
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if (tool_name == "list_problems") {
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services::ProblemQuery q;
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q.q = args.get("q", "").asString();
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q.page = std::max(1, args.get("page", 1).asInt());
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q.page_size = std::max(1, std::min(100, args.get("page_size", 20).asInt()));
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q.source_prefix = args.get("source_prefix", "").asString();
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q.difficulty = std::max(0, std::min(10, args.get("difficulty", 0).asInt()));
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services::ProblemService svc(csp::AppState::Instance().db());
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const auto rows = svc.List(q);
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Json::Value items(Json::arrayValue);
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for (const auto& row : rows.items) {
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items.append(domain::ToJson(row));
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}
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Json::Value result;
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result["items"] = items;
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result["total_count"] = rows.total_count;
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auto resp = drogon::HttpResponse::newHttpJsonResponse(BuildMcpOk(id, result));
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cb(resp);
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return;
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}
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if (tool_name == "get_problem") {
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const int64_t problem_id = args.get("problem_id", 0).asInt64();
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services::ProblemService svc(csp::AppState::Instance().db());
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const auto p = svc.GetById(problem_id);
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if (!p.has_value()) {
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auto resp = drogon::HttpResponse::newHttpJsonResponse(
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BuildMcpError(id, -32004, "problem not found"));
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cb(resp);
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return;
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}
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Json::Value result = domain::ToJson(*p);
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auto resp = drogon::HttpResponse::newHttpJsonResponse(BuildMcpOk(id, result));
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cb(resp);
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return;
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}
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if (tool_name == "run_cpp") {
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const std::string code = args.get("code", "").asString();
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const std::string input = args.get("input", "").asString();
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services::SubmissionService svc(csp::AppState::Instance().db());
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const auto r = svc.RunOnlyCpp(code, input);
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Json::Value result;
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result["status"] = domain::ToString(r.status);
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result["time_ms"] = r.time_ms;
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result["stdout"] = r.stdout_text;
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result["stderr"] = r.stderr_text;
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result["compile_log"] = r.compile_log;
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auto resp = drogon::HttpResponse::newHttpJsonResponse(BuildMcpOk(id, result));
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cb(resp);
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return;
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}
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if (tool_name == "generate_cspj_problem") {
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const int count = std::max(1, std::min(5, args.get("count", 1).asInt()));
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const bool started =
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services::ProblemGenRunner::Instance().TriggerAsync("mcp", count);
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Json::Value result;
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result["started"] = started;
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result["count"] = count;
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result["running"] = services::ProblemGenRunner::Instance().IsRunning();
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auto resp = drogon::HttpResponse::newHttpJsonResponse(BuildMcpOk(id, result));
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cb(resp);
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return;
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}
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auto resp = drogon::HttpResponse::newHttpJsonResponse(
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BuildMcpError(id, -32602, "unknown tool"));
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cb(resp);
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} catch (const std::runtime_error& e) {
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auto resp = drogon::HttpResponse::newHttpJsonResponse(
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BuildMcpError(Json::nullValue, -32000, e.what()));
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resp->setStatusCode(drogon::k400BadRequest);
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cb(resp);
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} catch (const std::exception& e) {
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auto resp = drogon::HttpResponse::newHttpJsonResponse(
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BuildMcpError(Json::nullValue, -32000, e.what()));
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resp->setStatusCode(drogon::k500InternalServerError);
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cb(resp);
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}
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}
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} // namespace csp::controllers
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