DownloadManager.h

#pragma once
#ifndef SM_DOWNMANAGER
#define SM_DOWNMANAGER
 
#include "Etterna/Globals/global.h"
#include "RageUtil/File/RageFile.h"
#include "Etterna/Models/HighScore/HighScore.h"
#include "ScreenManager.h"
#include "RageUtil/File/RageFileManager.h"
#include "Etterna/Models/Misc/Difficulty.h"
 
#include "curl/curl.h"
#include "rapidjson/document.h"
 
#include <deque>
#include <unordered_set>
#include <unordered_map>
#include <math.h>
 
class ScoreGoal;
class DownloadablePack;
class RageTexture;
 
class ProgressData
{
  public:
    std::atomic<curl_off_t> total{ 0 };
    std::atomic<curl_off_t> downloaded{ 0 };
    float time{ 0 };
};
 
class RageFileWrapper
{
  public:
    RageFile file;
    std::atomic<size_t> bytes{ 0 };
    std::atomic<bool> stop{ false };
};
 
class Download
{
  public:
    Download(
      std::string url,
      std::string filename = "");
    ~Download();
    void Install();
    void Update(float fDeltaSeconds);
    void Failed();
    std::string StartMessage()
    {
        auto str = "Downloading: " + m_TempFileName;
        if (str.length() > 64) {
            str = str.substr(0, 60) + "...";
        }
        return str;
    };
    std::string Status()
    {
        return m_TempFileName + "\n" + speed + " KB/s\n" + "Downloaded " +
               std::to_string((progress.downloaded.load() > 0
                                 ? progress.downloaded.load()
                                 : p_RFWrapper.bytes.load()) /
                              1024) +
               (progress.total.load() > 0
                  ? "/" + std::to_string(progress.total.load() / 1024) + " (KB)"
                  : "");
    }
    CURL* handle{ nullptr };
    int running{ 1 };
    ProgressData progress;
    std::string speed{ "" };
    curl_off_t downloadedAtLastUpdate{ 0 };
    curl_off_t lastUpdateDone{ 0 };
    std::string m_Url{ "" };
    RageFileWrapper p_RFWrapper;
    DownloadablePack* p_Pack{ nullptr };
    std::string m_TempFileName{ "" };
    // Lua
    void PushSelf(lua_State* L);
 
  protected:
    std::string MakeTempFileName(std::string s);
};
 
class DownloadablePack
{
  public:
    std::string name{ "" };
    int64_t size{ 0 };
    int id{ 0 };
    float avgDifficulty{ 0 };
    int plays{ 0 };
    int songs{ 0 };
    bool nsfw{ false };
    std::string url{ "" };
    std::string mirror{ "" };
    std::string bannerUrl{ "" };
    std::string thumbnail{ "" };
    bool downloading{ false };
    bool isQueued();
    RageTexture* GetThumbnailTexture();
    // Lua
    void PushSelf(lua_State* L);
};
 
class DownloadablePackPaginationKey
{
  public:
    DownloadablePackPaginationKey(const std::string& searchString,
                                  std::set<std::string>& tagFilters,
                                  bool tagsMatchAny,
                                  int perPage,
                                  const std::string& sortField,
                                  bool ascendingSort)
      : searchString(searchString)
      , tagFilters(tagFilters)
      , tagsMatchAny(tagsMatchAny)
      , perPage(perPage)
      , sortByField(sortField)
      , sortIsAsc(ascendingSort)
    {
    }
    DownloadablePackPaginationKey()
      : searchString("")
      , tagFilters({})
      , tagsMatchAny(true)
      , perPage(0)
      , sortByField("")
      , sortIsAsc(true)
    {
    }
 
    bool operator==(const DownloadablePackPaginationKey& other) const
    {
        return (perPage == other.perPage) &&
               (searchString == other.searchString) &&
               (tagFilters == other.tagFilters) &&
               (tagsMatchAny == other.tagsMatchAny) &&
               (sortByField == other.sortByField) &&
               (sortIsAsc == other.sortIsAsc);
    }
 
    std::string searchString{};
    std::set<std::string> tagFilters{};
    int perPage = 0;
    std::string sortByField{};
    bool sortIsAsc = true;
    bool tagsMatchAny = true;
};
 
class DownloadablePackPagination
{
  public:
    DownloadablePackPagination(const std::string& searchString,
                               std::set<std::string>& tagFilters,
                               bool tagsMatchAny,
                               int perPage,
                               const std::string& sortByField,
                               bool sortIsAsc)
      : key(searchString,
            tagFilters,
            tagsMatchAny,
            perPage,
            sortByField,
            sortIsAsc)
    {
    }
    DownloadablePackPagination(const DownloadablePackPaginationKey& key)
      : key(key)
    {
    }
    DownloadablePackPagination()
      : key({}) // ??
    {
    }
 
    bool operator==(const DownloadablePackPagination& other)
    {
        // under normal circumstances no two paginations
        // with the same key and different data
        // should exist
        return key == other.key;
    }
 
    DownloadablePackPaginationKey key;
 
    int currentPage = 0;
    int totalEntries = 0;
    std::vector<DownloadablePack*> results{};
 
    // if true, page can't move
    bool pendingRequest = false;
 
    // if true, a request was made and got no results
    bool noResults = false;
 
    bool initialized = false;
 
    void initialize(LuaReference& whenDone = EMPTY_REFERENCE) {
        setPage(0, whenDone);
    }
 
    // get the cached packs on the current page
    std::vector<DownloadablePack*> get() {
        auto it = results.begin();
        if (results.size() > currentPageStartIndex()) {
            // make sure the start iterator is valid
            it += currentPageStartIndex();
        }
 
        std::vector<DownloadablePack*> o{};
 
        while (it != results.end()) {
            o.push_back(*it);
            it++;
        }
        return o;
    }
 
    // get all the packs that are cached
    std::vector<DownloadablePack*> getCache() { return results; }
 
    // move to next page and send packs to lua function
    // possibly invoking a search request
    void nextPage(LuaReference& whenDone = EMPTY_REFERENCE)
    {
        setPage(getNextPageNbr(), whenDone);
    }
    // move to prev page and send packs to lua function
    // possibly invoking a search request
    void prevPage(LuaReference& whenDone = EMPTY_REFERENCE)
    {
        setPage(getPrevPageNbr(), whenDone);
    }
 
    // number of pages, so "1" has only a page "0"
    int getTotalPages() {
        return static_cast<int>(ceilf(static_cast<float>(totalEntries) /
                                      static_cast<float>(key.perPage)));
    }
 
    // Lua
    void PushSelf(lua_State* L);
 
  private:
    static LuaReference EMPTY_REFERENCE;
 
    std::set<int> finishedPageRequests{};
 
    // return inclusive starting index of page
    int currentPageStartIndex() {
        return key.perPage * currentPage;
    }
 
    int getNextPageNbr() {
        if (key.perPage >= totalEntries) {
            return 0;
        }
        if (currentPage == getTotalPages() - 1) {
            return 0;
        } else {
            return currentPage + 1;
        }
    }
    int getPrevPageNbr() {
        if (key.perPage >= totalEntries) {
            return 0;
        }
        if (currentPage == 0) {
            return getTotalPages() - 1;
        } else {
            return currentPage - 1;
        }
    }
    // move to n page and send packs to lua function
    // possibly invoking a search request
    void setPage(int page, LuaReference& whenDone = EMPTY_REFERENCE);
 
    bool mustRequestPage(int page) {
        const auto ind = key.perPage * page;
        if (results.size() <= ind) {
            // dont make requests out of range
            return false;
        }
        // if null, need to request it
        return results.at(ind) == nullptr;
    }
};
 
// required to actually use the key as a key
// in unordered containers
template<>
struct std::hash<DownloadablePackPaginationKey>
{
    std::size_t operator()(const DownloadablePackPaginationKey& k) const {
        size_t r = 17;
        r = r * 31 + std::hash<int>()(k.perPage);
        r = r * 31 + std::hash<std::string>()(k.searchString);
        size_t s = 0;
        for (const auto& tag : k.tagFilters) {
            std::hash<std::string> h;
            s ^= h(tag) + 0x9e3779b9 + (s << 6) + (s >> 2);
        }
        r = r * 31 + s;
        r = r * 31 + std::hash<std::string>()(k.sortByField);
        r = r * 31 + std::hash<bool>()(k.sortIsAsc);
        r = r * 31 + std::hash<bool>()(k.tagsMatchAny);
        return r;
    }
};
 
struct ApiSearchCriteria
{
    // request body
    std::string packName{};
    std::string songName{};
    std::string chartAuthor{};
    std::string songArtist{};
    std::vector<std::string> packTags{};
    bool packTagsMatchAny = true;
 
    std::string sortBy{};
    bool sortIsAscending = true;
 
    // request params (actual names)
    int page = 0;
    int per_page = 0;
 
    auto DebugString() const -> std::string
    {
        std::string o = "(ApiSearchCriteria ";
        o += fmt::format("page: {}, per_page: {}", page, per_page);
        if (!packName.empty()) {
            o += fmt::format(", packName: {}", packName);
        }
        if (!songName.empty()) {
            o += fmt::format(", songName: {}", songName);
        }
        if (!chartAuthor.empty()) {
            o += fmt::format(", chartAuthor: {}", chartAuthor);
        }
        if (!songArtist.empty()) {
            o += fmt::format(", songArtist: {}", songArtist);
        }
        if (!packTags.empty()) {
            o += fmt::format(", tags (matchAny={}): [", packTagsMatchAny);
            for (auto& s : packTags) {
                o += fmt::format("'{}'", s);
            }
            o += "]";
        }
        if (!sortBy.empty()) {
            o += fmt::format(
              ", sortBy: {}:{}", sortBy, sortIsAscending ? "asc" : "desc");
        }
        return o + ")";
    }
};
 
 
class HTTPRequest
{
  public:
    HTTPRequest(
      CURL* h,
      std::function<void(HTTPRequest&)> done = [](HTTPRequest& req) {},
      curl_httppost* postform = nullptr,
      std::function<void(HTTPRequest&)> fail = [](HTTPRequest& req) {},
      bool requiresLogin = false)
      : handle(h)
      , form(postform)
      , Done(done)
      , Failed(fail)
      , requiresLogin(requiresLogin){};
    long response_code{ 0 };
    CURL* handle{ nullptr };
    curl_httppost* form{ nullptr };
    std::string result;
    std::string headers;
    std::function<void(HTTPRequest&)> Done;
    std::function<void(HTTPRequest&)> Failed;
    bool requiresLogin = false;
};
enum class RequestMethod
{
    GET = 0,
    POST = 1,
    PATCH = 2,
    DEL = 3,
};
class OnlineTopScore
{
  public:
    float wifeScore{ 0.0f };
    std::string songName;
    float rate{ 0.0f };
    float ssr{ 0.0f };
    float overall{ 0.0f };
    std::string chartkey;
    std::string scorekey;
    Difficulty difficulty;
    std::string steps;
};
struct OnlineHighScore : HighScore
{
  public:
    bool hasReplay;
    bool HasReplayData() override { return hasReplay; }
};
class OnlineScore
{
  public:
    std::map<Skillset, float> SSRs;
    float rate{ 0.0f };
    float wife{ 0.0f };
    int wifeversion{ 0 };
    int maxcombo{ 0 };
    int miss{ 0 };
    int bad{ 0 };
    int good{ 0 };
    int great{ 0 };
    int perfect{ 0 };
    int marvelous{ 0 };
    int minehits{ 0 };
    int held{ 0 };
    int holdmiss{ 0 };
    std::string songId;
    int letgo{ 0 };
    bool valid{ false };
    bool nocc{ false };
    std::string username;
    float playerRating{ 0.0f };
    std::string modifiers;
    std::string scoreid;
    std::string avatar;
    int userid;
    DateTime datetime;
    bool hasReplay{ false };
    std::vector<std::pair<float, float>> replayData;
    std::string countryCode;
    OnlineHighScore hs;
    void Push(lua_State* L) { hs.PushSelf(L); }
    bool HasReplayData() { return hasReplay; }
};
 
class DownloadManager
{
  // new
  public:
    DownloadManager();
    ~DownloadManager();
 
    // Upkeep
    void Init();
    void Update(float fDeltaSeconds);
    void UpdatePacks(float fDeltaSeconds);
    void UpdateHTTP(float fDeltaSeconds);
    void UpdateGameplayState(bool gameplay);
 
    // Lua external access
    void PushSelf(lua_State* L);
 
    // State getters
    bool LoggedIn();
    bool ShouldUploadScores();
    bool InGameplay() { return gameplay; }
 
    // External Facing API Request Generators
    void Login(
      const std::string& username,
      const std::string& password,
      std::function<void(bool)> done = [](bool loggedIn) {})
    {
        LoginRequest(username, password, done);
    }
    void LoginWithToken(
      const std::string& sessionToken,
      std::function<void(bool)> done = [](bool loggedIn) {});
    void Logout();
    void LogoutIfLoggedIn()
    {
        if (LoggedIn())
            Logout();
    }
 
    void GetRankedChartkeys(
      std::function<void(void)> callback = []() {},
      const DateTime start = DateTime::GetFromString("1990-01-01 12:00:00"),
      const DateTime end = DateTime::GetFromString("2100-01-01 12:00:00"))
    {
        GetRankedChartkeysRequest(callback, start, end);
    }
    void AddFavorite(const std::string& chartKey)
    {
        AddFavoriteRequest(chartKey);
    }
    void BulkAddFavorites(
      std::vector<std::string> chartKeys,
      std::function<void()> = []() {});
    void RemoveFavorite(const std::string& chartKey)
    {
        RemoveFavoriteRequest(chartKey);
    }
    void RefreshFavorites(
      const DateTime start = DateTime::GetFromString("1990-01-01 12:00:00"),
      const DateTime end = DateTime::GetFromString("2100-01-01 12:00:00"));
    void AddGoal(ScoreGoal* goal) {
        AddGoalRequest(goal);
    }
    void BulkAddGoals(
      std::vector<ScoreGoal*> goals,
      std::function<void()> callback = []() {});
    void UpdateGoal(ScoreGoal* goal) {
        UpdateGoalRequest(goal);
    }
    void RemoveGoal(ScoreGoal* goal, bool oldGoal = false) {
        RemoveGoalRequest(goal, oldGoal);
    }
    void RefreshGoals(
      const DateTime start = DateTime::GetFromString("1990-01-01 12:00:00"),
      const DateTime end = DateTime::GetFromString("2100-01-01 12:00:00"));
    void AddPlaylist(const std::string& name) {
        AddPlaylistRequest(name);
    }
    void UpdatePlaylist(const std::string& name)
    {
        UpdatePlaylistRequest(name);
    }
    void RemovePlaylist(const std::string& name)
    {
        RemovePlaylistRequest(name);
    }
    // the point of this is to maintain the online id of playlists
    void LoadPlaylists(
      const DateTime start = DateTime::GetFromString("1990-01-01 12:00:00"),
      const DateTime end = DateTime::GetFromString("2100-01-01 12:00:00"));
    void DownloadMissingPlaylists(
      const DateTime start = DateTime::GetFromString("1990-01-01 12:00:00"),
      const DateTime end = DateTime::GetFromString("2100-01-01 12:00:00"));
    void DownloadPlaylist(const std::string& name);
 
    // Score upload functions
    void UploadScore(HighScore* hs,
                     std::function<void()> callback,
                     bool load_from_disk);
    void UploadScoreWithReplayData(HighScore* hs);
    void UploadScoreWithReplayDataFromDisk(
      HighScore* hs,
      std::function<void()> callback = []() {});
    void UploadBulkScores(
      std::vector<HighScore*> hsList,
      std::function<void()> callback = []() {});
 
    void RefreshPackTags();
    void SearchForPacks(ApiSearchCriteria searchCriteria,
                        std::function<void(rapidjson::Document&)> packSearchParser)
    {
        MultiSearchRequest(searchCriteria, packSearchParser);
    }
 
    // Mass score upload functions
    bool ForceUploadPBsForChart(const std::string& ck, bool startNow = false);
    bool ForceUploadPBsForPack(const std::string& pack, bool startNow = false);
    bool ForceUploadAllPBs();
    bool InitialScoreSync();
 
    void GetChartLeaderboard(const std::string& chartkey,
                             LuaReference& ref = EMPTY_REFERENCE)
    {
        GetChartLeaderboardRequest(chartkey, ref);
    }
    void GetReplayData(const std::string& scorekey,
                       int userid,
                       const std::string& username,
                       const std::string& chartkey,
                       LuaReference& callback = EMPTY_REFERENCE)
    {
        GetReplayDataRequest(scorekey, userid, username, chartkey, callback);
    }
 
    OnlineTopScore GetTopSkillsetScore(unsigned int rank,
                                       Skillset ss,
                                       bool& result);
    float GetSkillsetRating(Skillset ss);
    int GetSkillsetRank(Skillset ss);
 
    DownloadablePackPagination& GetPackPagination(
      const std::string& searchString,
      std::set<std::string> tagFilters,
      bool tagsMatchAny,
      int perPage,
      const std::string& sortBy,
      bool sortIsAsc);
    std::shared_ptr<Download> DownloadAndInstallPack(const std::string& url,
                                                     std::string filename = "");
    std::shared_ptr<Download> DownloadAndInstallPack(DownloadablePack* pack,
                                                     bool mirror = false);
 
    void DownloadCoreBundle(const std::string& bundlename, bool mirror = false);
    std::vector<DownloadablePack*> GetCoreBundle(const std::string& bundlename);
 
    bool OpenSitePage(const std::string& path);
    bool OpenProjectPage(const std::string& path);
 
    bool ShowPackPage(int packid) {
        return OpenSitePage(fmt::format("/packs/{}", packid));
    }
    bool ShowUserPage(const std::string& username){
        return OpenSitePage(fmt::format("/users/{}", username));
    }
    bool ShowScorePage(const std::string& username, int scoreid)
    {
        return OpenSitePage(
          fmt::format("/users/{}/scores/{}", username, scoreid));
    }
    bool ShowBugReportSite();
    bool ShowEditorSite();
    bool ShowProjectReleases() {
        return OpenProjectPage("/releases");
    }
    bool ShowProjectSite() {
        return OpenProjectPage("");
    }
 
    // User session
    // Session cookie content
    std::string authToken{ "" };
    // Currently logged in username
    std::string sessionUser{ "" };
    // Leaderboard ranks for logged in user by skillset
    std::map<Skillset, int> sessionRanks{};
    // Online profile skillset ratings
    std::map<Skillset, double> sessionRatings{};
 
    // Score uploads
    std::deque<HighScore*> ScoreUploadSequentialQueue;
    unsigned int sequentialScoreUploadTotalWorkload{ 0 };
 
    // Goal uploads
    std::deque<ScoreGoal*> GoalUploadSequentialQueue;
    unsigned int sequentialGoalUploadTotalWorkload{ 0 };
 
    // Favorite uploads
    std::deque<std::string> FavoriteUploadSequentialQueue;
    unsigned int sequentialFavoriteUploadTotalWorkload{ 0 };
 
    // Pack downloads
    // Active downloads
    std::map<std::string, std::shared_ptr<Download>> downloads;
    // (pack,isMirror)
    std::deque<std::pair<DownloadablePack*, bool>> DownloadQueue;
    std::map<std::string, std::shared_ptr<Download>> finishedDownloads;
    std::map<std::string, std::shared_ptr<Download>> pendingInstallDownloads;
    std::map<int, DownloadablePack> downloadablePacks;
    std::unordered_map<std::string, std::vector<std::string>> packTags;
    std::unordered_map<DownloadablePackPaginationKey,
                       DownloadablePackPagination>
      downloadablePackPaginations{};
    // (tag_name, list of pack ids) -- we use this for bundles
    std::unordered_map<std::string, std::set<int>> tagPacks;
 
    // Chart leaderboards
    std::map<std::string, std::vector<OnlineScore>> chartLeaderboards{};
    std::map<Skillset, std::vector<OnlineTopScore>> topScores{};
    std::set<std::string> unrankedCharts{};
    bool currentrateonly = false;
    bool topscoresonly = true;
    bool validonly = true;
 
    // Misc information
    // Last version according to server (Or current if non was obtained)
    std::string lastVersion{ "" };
    std::string countryCode{ "" };
 
  private:
    static LuaReference EMPTY_REFERENCE;
 
    // Events
    void OnLogin();
 
    // Checks for generic response codes where we have consistent behavior
    // status 401 - log out the user, cancel uploads
    bool HandleAuthErrorResponse(const std::string& endpoint, HTTPRequest& req);
    // status 429 - requeue the request, wait a while
    bool HandleRatelimitResponse(const std::string& endpoint, HTTPRequest& req);
    bool QueueRequestIfRatelimited(const std::string& endpiont,
                                   HTTPRequest& req);
    void QueueRatelimitedRequest(const std::string& endpoint, HTTPRequest& req);
    // basically returns HandleAuthErrorResponse || HandleRatelimitResponse
    // and runs the given lambda for the 401 or the 429. Won't run the 429
    // if a 401 is given first.
    bool Handle401And429Response(
      const std::string& endpoint,
      HTTPRequest& req,
      std::function<void()> if401 = []() {},
      std::function<void()> if429 = []() {});
 
 
    // Specialized API Requests
    void LoginRequest(const std::string& username,
                      const std::string& password,
                      std::function<void(bool)> done);
    void GetRankedChartkeysRequest(std::function<void(void)> callback,
                                   const DateTime start,
                                   const DateTime end);
    void AddFavoriteRequest(const std::string& chartKey);
    void RemoveFavoriteRequest(const std::string& chartKey);
    void GetFavoritesRequest(
      std::function<void(std::set<std::string>)> onSuccess,
      const DateTime start,
      const DateTime end);
    void AddGoalRequest(ScoreGoal* goal);
    void UpdateGoalRequest(ScoreGoal* goal);
    void RemoveGoalRequest(ScoreGoal* goal, bool oldGoal);
    void GetGoalsRequest(std::function<void(std::vector<ScoreGoal>)> onSuccess,
                         const DateTime start,
                         const DateTime end);
    void AddPlaylistRequest(const std::string& name);
    void UpdatePlaylistRequest(const std::string& name);
    void RemovePlaylistRequest(const std::string& name);
    void GetPlaylistsRequest(
      std::function<void(std::unordered_map<std::string, Playlist>)> onSuccess,
      const DateTime start,
      const DateTime end);
    void GetPlaylistRequest(std::function<void(Playlist)> onSuccess, int id);
    void GetChartLeaderboardRequest(const std::string& chartkey,
                                    LuaReference& ref);
    void GetReplayDataRequest(const std::string& scorekey,
                              int userid,
                              const std::string& username,
                              const std::string& chartkey,
                              LuaReference& callback);
 
    void RefreshUserData();
    void RequestTop25(Skillset ss);
    void RefreshLastVersion();
 
    void GetPackTagsRequest();
    void CachePacksForTag(const std::string& tag);
 
    void MultiSearchRequest(ApiSearchCriteria searchCriteria,
                            std::function<void(rapidjson::Document&)> whenDoneParser);
 
    // To send a request to API base URL and ratelimit at that URL
    HTTPRequest* SendRequest(
      std::string requestName,
      std::vector<std::pair<std::string, std::string>> params,
      std::function<void(HTTPRequest&)> done,
      bool requireLogin = true,
      RequestMethod httpMethod = RequestMethod::GET,
      bool compressed = false,
      bool async = true,
      bool withBearer = true);
    // To send a request to API based URL, ratelimit at different path
    HTTPRequest* SendRequest(
      std::string requestName,
      std::string apiPath,
      std::vector<std::pair<std::string, std::string>> params,
      std::function<void(HTTPRequest&)> done,
      bool requireLogin = true,
      RequestMethod httpMethod = RequestMethod::GET,
      bool compressed = false,
      bool async = true,
      bool withBearer = true);
    // Send a request directly to a given URL, ratelimit at other path
    HTTPRequest* SendRequestToURL(
      std::string url,
      std::string apiPath,
      std::vector<std::pair<std::string, std::string>> params,
      std::function<void(HTTPRequest&)> done,
      bool requireLogin,
      RequestMethod httpMethod,
      bool compressed,
      bool async,
      bool withBearer);
 
    // Active HTTP requests (async, curlMulti)
    std::vector<HTTPRequest*> HTTPRequests;
 
    CURLM* pack_multi_handle = nullptr;
    CURLM* http_req_handle = nullptr;
 
    // Currently logging in (Since it's async, to not try twice)
    bool loggingIn{ false };
    // Currently in gameplay y/n
    bool gameplay{ false };
    bool initialized{ false };
 
    float timeSinceLastDownload = 0.F;
 
    std::unordered_map<std::string, std::chrono::steady_clock::time_point>
      endpointRatelimitTimestamps{};
    std::unordered_map<std::string, std::vector<HTTPRequest*>>
      ratelimitedRequestQueue{};
    std::unordered_set<std::string> newlyRankedChartkeys{};
 
 
  // old
  public:
 
    void RefreshPackList(const std::string& url);
};
 
extern std::shared_ptr<DownloadManager> DLMAN;
 
#endif