text: /*
   *  Original work: Copyright (c) 2014, Oculus VR, Inc.
   *  All rights reserved.
   *
   *  This source code is licensed under the BSD-style license found in the
   *  RakNet License.txt file in the licenses directory of this source tree. An additional grant 
   *  of patent rights can be found in the RakNet Patents.txt file in the same directory.
   *
   *
   *  Modified work: Copyright (c) 2017, SLikeSoft UG (haftungsbeschränkt)
   *
   *  This source code was modified by SLikeSoft. Modifications are licensed under the MIT-style
   *  license found in the license.txt file in the root directory of this source tree.
   */
  
  /// \file
  /// \brief An implementation of the AutopatcherRepositoryInterface to use MySQL to store the relevant data
  ///
  
  
  
  #ifndef __MYSQL_REPOSITORY_H
  #define __MYSQL_REPOSITORY_H
  
  #include "slikenet/AutopatcherRepositoryInterface.h"
  #include "MySQLInterface.h"
  #include "slikenet/Export.h"
  
  namespace SLNet
  {
  class FileListProgress;
  
  
  /// \ingroup Autopatcher
  ///  An implementation of the AutopatcherRepositoryInterface to use MySQL to store the relevant data
  class RAK_DLL_EXPORT AutopatcherMySQLRepository : public AutopatcherRepositoryInterface, public MySQLInterface
  {
  public:
  	AutopatcherMySQLRepository();
  	~AutopatcherMySQLRepository();
  
  	/// Create the tables used by the autopatcher, for all applications.  Call this first.
  	/// \return True on success, false on failure.
  	bool CreateAutopatcherTables(void);
  
  	/// Destroy the tables used by the autopatcher.  Don't call this unless you don't want to use the autopatcher anymore, or are testing.
  	/// \return True on success, false on failure.
  	bool DestroyAutopatcherTables(void);
  
  	/// Add an application for use by files.  Call this second.
  	/// \param[in] applicationName A null terminated string.
  	/// \param[in] userName Stored in the database, but otherwise unused.  Useful to track who added this application.
  	/// \return True on success, false on failure.
  	bool AddApplication(const char *applicationName, const char *userName);
  
  	/// Remove an application and files used by that application.
  	/// \param[in] applicationName A null terminated string previously passed to AddApplication
  	/// \return True on success, false on failure.
  	bool RemoveApplication(const char *applicationName);
  
  	/// Update all the files for an application to match what is at the specified directory.  Call this third.
  	/// Be careful not to call this with the wrong directory.
  	/// This is implemented in a Begin and Rollback block so you won't a messed up database from get partial updates.
  	/// \param[in] applicationName A null terminated string previously passed to AddApplication
  	/// \param[in] applicationDirectory The base directory of your application.  All files in this directory and subdirectories are added.
  	/// \param[in] userName Stored in the database, but otherwise unused.  Useful to track who added this revision
  	/// \param[in] cb Callback to get progress updates. Pass 0 to not use.
  	/// \return True on success, false on failure.
  	bool UpdateApplicationFiles(const char *applicationName, const char *applicationDirectory, const char *userName, FileListProgress *cb);
  
  	/// Get list of files added and deleted since a certain date.  This is used by AutopatcherServer and not usually explicitly called.
  	/// \param[in] applicationName A null terminated string previously passed to AddApplication
  	/// \param[out] addedFiles A list of the current versions of filenames with SHA1_LENGTH byte hashes as their data that were created after \a sinceData
  	/// \param[out] deletedFiles A list of the current versions of filenames that were deleted after \a sinceData
  	/// \param[in] An input date, in the string format of a timestamp.
  	/// \return True on success, false on failure.
  	virtual bool GetChangelistSinceDate(const char *applicationName, FileList *addedOrModifiedFilesWithHashData, FileList *deletedFiles, double sinceDate);
  
  	/// Get patches (or files) for every file in input, assuming that input has a hash for each of those files.  This is used by AutopatcherServer and not usually explicitly called.
  	/// \param[in] applicationName A null terminated string previously passed to AddApplication
  	/// \param[in] input A list of files with hashes to get from the database.  If this hash exists, a patch to the current version is returned if this file is not the current version.  Otherwise the current version is returned.
  	/// \param[out] patchList A list of files with either the filedata or the patch.  This is a subset of \a input.  The context data for each file will be either PC_WRITE_FILE (to just write the file) or PC_HASH_WITH_PATCH (to patch).  If PC_HASH_WITH_PATCH, then the file contains a SHA1_LENGTH byte patch followed by the hash.  The datalength is patchlength + SHA1_LENGTH
  	/// \return 1 on success, 0 on database failure, -1 on tried to download original unmodified file
  	virtual int GetPatches(const char *applicationName, FileList *input, bool allowDownloadOfOriginalUnmodifiedFiles, FileList *patchList);
  
  	// Not yet implemented
  	virtual bool GetMostRecentChangelistWithPatches(SLNet::RakString &applicationName, FileList *patchedFiles, FileList *addedFiles, FileList *addedOrModifiedFileHashes, FileList *deletedFiles, double *priorRowPatchTime, double *mostRecentRowPatchTime);
  
  	/// If any of the above functions fail, the error string is stored internally.  Call this to get it.
  	virtual const char *GetLastError(void) const;
  
  	/// Read part of a file into \a destination
  	/// Return the number of bytes written. Return 0 when file is done.
  	/// \param[in] filename Filename to read
  	/// \param[in] startReadBytes What offset from the start of the file to read from
  	/// \param[in] numBytesToRead How many bytes to read. This is also how many bytes have been allocated to preallocatedDestination
  	/// \param[out] preallocatedDestination Write your data here
  	/// \return The number of bytes read, or 0 if none
  	virtual unsigned int GetFilePart( const char *filename, unsigned int startReadBytes, unsigned int numBytesToRead, void *preallocatedDestination, FileListNodeContext context);
  
  	/// \return Passed to FileListTransfer::Send() as the _chunkSize parameter.
  	virtual const int GetIncrementalReadChunkSize(void) const;
  
  	st_mysql *filePartConnection;
  	SimpleMutex filePartConnectionMutex;
  };
  
  } // namespace SLNet
  
  #endif
  