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Synchronization.cs
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Synchronization.cs
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//********************************************************************************************
//Author: Sergiy Stoyan
// s.y.stoyan@gmail.com, sergiy.stoyan@outlook.com, stoyan@cliversoft.com
// http://www.cliversoft.com
//********************************************************************************************
using System;
using System.IO;
using System.Text.RegularExpressions;
using System.Threading;
using System.Collections.Generic;
using System.Linq;
namespace Cliver
{
/// <summary>
/// Template for synchronizing Settings storage files, any files and application setup files through a cloud service. (The local system is required to have the service synchronizing app running.)
/// </summary>
abstract public class Synchronization
{
/// <summary>
///
/// </summary>
abstract protected HashSet<string> synchronizedSettingsFieldFullNames { get; }
//abstract protected HashSet<Type> synchronizedSettingsTypes { get; }
/// <summary>
///
/// </summary>
/// <param name="settings"></param>
abstract protected void onNewerSettingsFile(Settings settings);
//{
// throw new Exception("TBD: A newer settings " + settings.__Info.FullName + " have been downloaded from the remote storage. Upon closing this message they will be updated in the application.");
//}
/// <summary>
///
/// </summary>
abstract protected HashSet<SynchronizedFolder> synchronizedFolders { get; }
public struct SynchronizedFolder
{
readonly public string Folder;
readonly public string SynchronizationFolderName;
readonly public Regex FileNameFilter;
public SynchronizedFolder(string folder, Regex fileNameFilter = null, string synchronizationFolderName = null)
{
Folder = folder;
FileNameFilter = fileNameFilter;
SynchronizationFolderName = synchronizationFolderName;
}
}
/// <summary>
///
/// </summary>
/// <param name="file"></param>
abstract protected void onNewerFile(string file);
//{
// throw new Exception("TBD: A newer file " + file + " has been downloaded from the remote storage. Upon closing this message it will be updated in the application.");
//}
/// <summary>
///
/// </summary>
abstract protected Regex appSetupFileFilter { get; }// = new Regex(System.Diagnostics.Process.GetCurrentProcess().ProcessName + @"\.Setup\-(\d+\.\d+\.\d+)", RegexOptions.IgnoreCase);
/// <summary>
///
/// </summary>
abstract protected Version programVersion { get; }// = Program.Version;
/// <summary>
///
/// </summary>
/// <param name="appSetupFile"></param>
abstract protected void onNewerAppVersion(string appSetupFile);
//{
// throw new Exception("TBD: A newer app version has been downloaded: " + appSetupFile + "\r\nWould you like to install it now?");
//}
/// <summary>
///
/// </summary>
/// <param name="e"></param>
abstract protected void ErrorHandler(Exception e);
/// <summary>
///
/// </summary>
public class Parameters
{
/// <summary>
///
/// </summary>
public string SynchronizationFolder = null;
/// <summary>
///
/// </summary>
public readonly string DownloadFolderName = "_download";
/// <summary>
///
/// </summary>
public readonly string UploadFolderName = "_upload";
/// <summary>
///
/// </summary>
public bool Synchronize = false;
/// <summary>
///
/// </summary>
public int PollingPeriodMss = 60000;
}
/// <summary>
/// Actualize new parameters.
/// </summary>
/// <param name="parameters"></param>
virtual public void Switch(Parameters parameters)
{
try
{
if (parameters.Synchronize)
{
if (string.IsNullOrWhiteSpace(parameters.SynchronizationFolder))
throw new Exception("SynchronizationFolder is not set.");
//if (string.IsNullOrWhiteSpace(parameters.UploadFolderName))
// throw new Exception("UploadFolderName is not set.");
//if (string.IsNullOrWhiteSpace(parameters.DownloadFolderName))
// throw new Exception("DownloadFolderName is not set.");
this.parameters = parameters;
//synchronizedSettingsFieldFullNames= synchronizedSettingsFieldFullNames.Distinct().ToList();
downloadFolder = FileSystemRoutines.CreateDirectory(parameters.SynchronizationFolder + Path.DirectorySeparatorChar + parameters.DownloadFolderName);
uploadFolder = FileSystemRoutines.CreateDirectory(parameters.SynchronizationFolder + Path.DirectorySeparatorChar + parameters.UploadFolderName);
//if (PathRoutines.IsDirWithinDir(downloadFolder, uploadFolder))
// throw new Exception("DownloadFolder cannot be within UploadFolder: \r\n" + downloadFolder + "\r\n" + uploadFolder);
//if (PathRoutines.IsDirWithinDir(downloadFolder, uploadFolder))
// throw new Exception("UploadFolder cannot be within DownloadFolder: \r\n" + uploadFolder + "\r\n" + downloadFolder);
appSetupFolder = FileSystemRoutines.CreateDirectory(parameters.SynchronizationFolder);
if (pollingThread?.IsAlive != true)
pollingThread = ThreadRoutines.Start(polling);
}
}
catch (Exception e)
{
ErrorHandler(e);
}
}
Parameters parameters = null;
string downloadFolder = null;
string uploadFolder = null;
string appSetupFolder = null;
Thread pollingThread = null;
void polling()
{
try
{
while (parameters.Synchronize)
{
foreach (string ssfn in synchronizedSettingsFieldFullNames)
{
SettingsFieldInfo sfi = Config.GetSettingsFieldInfo(ssfn);
Settings settings = sfi.GetObject();
if (settings == null)
continue;
pollDownloadSettingsFile(settings);
pollUploadSettingsFile(settings);
}
//foreach (Type sst in synchronizedSettingsTypes)
//{
// List<SettingsFieldInfo> sfis = Config.GetSettingsFieldInfos(sst);
// if (sfis.Count < 1)
// throw new Exception("Settings type " + sst.FullName + " was not found.");
// foreach (SettingsFieldInfo sfi in sfis)
// {
// Settings settings = sfi.GetObject();
// if (settings == null)
// continue;
// pollUploadSettingsFile(settings);
// pollDownloadSettingsFile(settings);
// }
//}
if (synchronizedFolders != null)
foreach (SynchronizedFolder sf in synchronizedFolders)
{
string synchronizationFolder = downloadFolder + Path.DirectorySeparatorChar + sf.SynchronizationFolderName;
if (Directory.Exists(synchronizationFolder))
foreach (string file in Directory.GetFiles(synchronizationFolder))
{
if (sf.FileNameFilter.IsMatch(PathRoutines.GetFileName(file)) == false)
continue;
try
{
DateTime downloadLWT = File.GetLastWriteTime(file);
if (downloadLWT.AddSeconds(100) > DateTime.Now)//it is being written
continue;
string file2 = sf.Folder + Path.DirectorySeparatorChar + PathRoutines.GetFileName(file);
if (File.Exists(file2) && downloadLWT <= File.GetLastWriteTime(file2))
continue;
copy(file, file2);
onNewerFile(file);
}
catch (Exception e)
{
ErrorHandler(e);
}
}
foreach (string file in Directory.GetFiles(sf.Folder))
{
if (sf.FileNameFilter.IsMatch(PathRoutines.GetFileName(file)) == false)
continue;
try
{
DateTime uploadLWT = File.GetLastWriteTime(file);
if (uploadLWT.AddSeconds(10) > DateTime.Now)//it is being written
continue;
string file2 = FileSystemRoutines.CreateDirectory(uploadFolder + Path.DirectorySeparatorChar + sf.SynchronizationFolderName) + Path.DirectorySeparatorChar + PathRoutines.GetFileName(file);
if (File.Exists(file2) && uploadLWT <= File.GetLastWriteTime(file2))
continue;
copy(file, file2);
}
catch (Exception e)
{
ErrorHandler(e);
}
}
}
string appSetupFile = null;
foreach (string file in Directory.GetFiles(appSetupFolder))
{
Match m = appSetupFileFilter?.Match(file);
if (m?.Success != true)
continue;
if (!Version.TryParse(m.Groups[1].Value, out Version v))
continue;
if (v > programVersion && v > lastAppVersion)
{
lastAppVersion = v;
appSetupFile = file;
}
}
if (appSetupFile != null)
{
AppNewSetupFile = appSetupFile;
onNewerAppVersion(appSetupFile);
continue;
}
Thread.Sleep(parameters.PollingPeriodMss);
}
}
catch (Exception e)
{
ErrorHandler(new Exception("Synchronization thread exited due to exception.", e));
}
}
Version lastAppVersion = new Version(0, 0, 0);
public string AppNewSetupFile { get; private set; } = null;
void pollUploadSettingsFile(Settings settings)
{
try
{
if (!File.Exists(settings.__Info.File))
return;
DateTime uploadLWT = File.GetLastWriteTime(settings.__Info.File);
if (uploadLWT.AddSeconds(10) > DateTime.Now)//it is being written
return;
string file2 = uploadFolder + Path.DirectorySeparatorChar + PathRoutines.GetFileName(settings.__Info.File);
if (File.Exists(file2) && uploadLWT <= File.GetLastWriteTime(file2))
return;
copy(settings.__Info.File, file2);
}
catch (Exception e)
{
ErrorHandler(e);
}
}
void pollDownloadSettingsFile(Settings settings)
{
try
{
string file = downloadFolder + Path.DirectorySeparatorChar + PathRoutines.GetFileName(settings.__Info.File);
if (!File.Exists(file))
return;
DateTime downloadLWT = File.GetLastWriteTime(file);
if (downloadLWT.AddSeconds(100) > DateTime.Now)//it is being written
return;
if (File.Exists(settings.__Info.File) && downloadLWT <= File.GetLastWriteTime(settings.__Info.File))
return;
copy(file, settings.__Info.File);
onNewerSettingsFile(settings);
}
catch (Exception e)
{
ErrorHandler(e);
}
}
static void copy(string file, string file2)
{
for (int i = 0; ; i++)
try
{
Log.Inform("Copying " + file + " to " + file2);
FileSystemRoutines.CopyFile(file, file2, true);
return;
}
catch (IOException ex)//no access while locked by sycnhronizing app
{
if (i >= 100)
throw new Exception("Could not copy file '" + file + "' to '" + file2 + "'", ex);
Thread.Sleep(1000);
}
}
}
}