Teaspeak-Server/server/src/DatabaseHelper.h

#pragma once

#include <Definitions.h>
#include <map>
#include <vector>
#include <chrono>
#include <PermissionManager.h>
#include <Properties.h>
#include <cstdint>

namespace ts {
    namespace server {
        class VirtualServer;
        class DataClient;

        struct ClientDatabaseInfo {
            ServerId sid;
            ClientDbId cldbid;
            std::chrono::time_point<std::chrono::system_clock> created;
            std::chrono::time_point<std::chrono::system_clock> lastjoin;
            std::string uniqueId;
            std::string lastName;
            uint32_t connections;
        };

        struct CachedPermissionManager {
            ServerId sid;
            ClientDbId cldbid;
            std::weak_ptr<permission::v2::PermissionManager> manager;
            std::shared_ptr<permission::v2::PermissionManager> ownLock;
            std::chrono::time_point<std::chrono::system_clock> lastAccess;
        };

        struct CachedProperties {
            ServerId sid;
            ClientDbId cldbid;
            std::weak_ptr<Properties> properties;
            std::shared_ptr<Properties> ownLock;
            std::chrono::time_point<std::chrono::system_clock> lastAccess;
        };

        /*
        CREATE_TABLE("properties", "`serverId` INTEGER DEFAULT -1, `type` INTEGER, `id` INTEGER, `key` VARCHAR(" UNKNOWN_KEY_LENGTH "), `value` TEXT", command_append_utf8);
        CREATE_TABLE("permissions", "`serverId` INT NOT NULL, `type` INT, `id` INT, `channelId` INT, `permId` VARCHAR(" UNKNOWN_KEY_LENGTH "), `value` INT, `grant` INT", command_append_utf8);
         */
        struct StartupPermissionEntry {
            permission::PermissionSqlType type = permission::SQL_PERM_CHANNEL;
            uint64_t id = 0;
            ChannelId channelId = 0;
            std::shared_ptr<permission::PermissionTypeEntry> permission = permission::PermissionTypeEntry::unknown;
            permission::PermissionValue value = 0;
            permission::PermissionValue grant = 0;

            bool flag_skip = false;
            bool flag_negate = false;
        };

        struct StartupPropertyEntry {
            property::PropertyType type = property::PropertyType::PROP_TYPE_UNKNOWN;
            uint64_t id{0};
            const property::PropertyDescription* info{&property::undefined_property_description};
            std::string value;
        };

        struct StartupCacheEntry {
            ServerId sid;

            std::deque<std::unique_ptr<StartupPermissionEntry>> permissions;
            std::deque<std::unique_ptr<StartupPropertyEntry>> properties;
        };

        struct FastPropertyEntry {
            const property::PropertyDescription* type;
            std::string value;
        };

        class DatabaseHelper {
            public:
                static std::shared_ptr<Properties> default_properties_client(std::shared_ptr<Properties> /* properties */, ClientType /* type */);
                static bool assignDatabaseId(sql::SqlManager *, ServerId id, std::shared_ptr<DataClient>);

                explicit DatabaseHelper(sql::SqlManager*);
                ~DatabaseHelper();

                void loadStartupCache();
                size_t cacheBinarySize();
                void clearStartupCache(ServerId sid = 0);

                void deleteClient(const std::shared_ptr<VirtualServer>&,ClientDbId);
                bool validClientDatabaseId(const std::shared_ptr<VirtualServer>&, ClientDbId);
                std::deque<std::shared_ptr<ClientDatabaseInfo>> queryDatabaseInfo(const std::shared_ptr<VirtualServer>&, const std::deque<ClientDbId>&);
                std::deque<std::shared_ptr<ClientDatabaseInfo>> queryDatabaseInfoByUid(const std::shared_ptr<VirtualServer> &, std::deque<std::string>);

                std::shared_ptr<permission::v2::PermissionManager> loadClientPermissionManager(const std::shared_ptr<VirtualServer>&, ClientDbId);
                void saveClientPermissions(const std::shared_ptr<VirtualServer>&, ClientDbId , const std::shared_ptr<permission::v2::PermissionManager>& /* permission manager */);

                std::shared_ptr<permission::v2::PermissionManager> loadChannelPermissions(const std::shared_ptr<VirtualServer>&, ChannelId);
                void saveChannelPermissions(const std::shared_ptr<VirtualServer>&, ChannelId, const std::shared_ptr<permission::v2::PermissionManager>& /* permission manager */);

                std::shared_ptr<permission::v2::PermissionManager> loadGroupPermissions(const std::shared_ptr<VirtualServer>&, GroupId);
                void saveGroupPermissions(const std::shared_ptr<VirtualServer>&, GroupId, const std::shared_ptr<permission::v2::PermissionManager>& /* permission manager */);

                std::shared_ptr<permission::v2::PermissionManager> loadPlaylistPermissions(const std::shared_ptr<VirtualServer>&, PlaylistId /* playlist id */);
                void savePlaylistPermissions(const std::shared_ptr<VirtualServer>&, PlaylistId, const std::shared_ptr<permission::v2::PermissionManager>& /* permission manager */);

                std::shared_ptr<Properties> loadServerProperties(const std::shared_ptr<VirtualServer>&); //Read and write
                std::shared_ptr<Properties> loadPlaylistProperties(const std::shared_ptr<VirtualServer>&, PlaylistId); //Read and write
                std::shared_ptr<Properties> loadChannelProperties(const std::shared_ptr<VirtualServer>&, ChannelId); //Read and write
                std::shared_ptr<Properties> loadClientProperties(const std::shared_ptr<VirtualServer>&, ClientDbId, ClientType);

                bool deleteGroupPermissions(const std::shared_ptr<VirtualServer>&, GroupId);
                bool deleteChannelPermissions(const std::shared_ptr<VirtualServer>&, ChannelId);
                bool deletePlaylist(const std::shared_ptr<VirtualServer>&, PlaylistId /* playlist id */);
                std::deque<std::unique_ptr<FastPropertyEntry>> query_properties(ServerId /* server */, property::PropertyType /* type */, uint64_t /* id */); /* required for server snapshots */

                void tick();
            private:
                void loadStartupPermissionCache();
                void loadStartupPropertyCache();

                bool use_startup_cache = false;
                threads::Mutex startup_lock;
                std::deque<std::shared_ptr<StartupCacheEntry>> startup_entries;

                sql::SqlManager* sql = nullptr;
                threads::Mutex permManagerLock;
                std::deque<CachedPermissionManager*> cachedPermissionManagers;
                threads::Mutex propsLock;
                std::deque<CachedProperties*> cachedProperties;
        };
    }
}