/// <summary>
/// Pushes the version taken as a parameter
/// Will return any changes that conflicts
/// IMPORTANT: The version is not commited at the server before null is returned!
/// </summary>
/// <param name="path">The path to the repository to push</param>
/// <param name="number">The version number used to identify the right version</param>
/// <param name="log">The changes given by a number of text-.</param>
/// <param name="user">The user to submit changes.</param>
/// <returns>
/// Any changes that conflicts or null if version is commited
/// </returns>
/// <exception cref="System.ArgumentNullException">Log can't be null</exception>
/// <exception cref="System.ArgumentException">Log can't be empty</exception>
public string[][] PushVersion(String path, int number, string[] log, User user)
{
if (log == null) throw new ArgumentNullException("Log can't be null");
if (log.Length < 1) throw new ArgumentException("Log can't be empty");
if (user == null) throw new ArgumentNullException("User can't be null");
if (String.IsNullOrEmpty(user.Name)) throw new ArgumentException("User's name is invalid: " + user.Name);
if (String.IsNullOrEmpty(user.Password)) throw new ArgumentException("User's password is invalid");
if (user.MAC == null) throw new ArgumentNullException("User's MAC address is invalid (" + user.MAC + " and can therefore not push");
Console.WriteLine("[" + DateTime.Now + "]: " + "User is pushing to the server: " + user.MAC);
//See if the user is known - if not: Throw an exception
//Connect(user);
var returnArray = new string[0][];
// Test that the version number is correct - otherwise we'll just store things at the wrong places.
var vcs = new ServerVersionControlSystem(path, _fileSystem);
var currentVersion = vcs.GetLatestVersionNumber();
if (currentVersion != number - 1)
{
throw new ArgumentException("Can not push version " + number + " to the server version " + currentVersion);
}
// If the last user that attempted to push is the same as the current user, no conflicts will occur.
if (PushedLastVersion(user))
{
// We can assume that everything has been resolved client side and execute all the changes made
IList<AbstractChange> changeList = ChangeParser.ParseChanges(log).Where(item => item != null).ToList();
// Store the version
SaveChanges(number, user, vcs, changeList);
}
else
{
String[] simpleChanges = SearchForSimpleChanges(log);
String[,] complexChanges = SearchForComplexChanges(log);
ISet<String> conflictingPathsOnServerSet = new SortedSet<string>();
ISet<String> conflictingPathsOnClientSet = new SortedSet<string>();
//Get paths to all text files in project directory and all sub directories.
String absolutePath = vcs.GetFileSystemRoot() + path;
IList<String> projectFilesList = new List<string>(Directory.GetFileSystemEntries(absolutePath, "*", SearchOption.AllDirectories).Where(s => s.Contains(FileSystem.META_DIR) == false));
// Discover potential conflicts
for (int i = 0; i < projectFilesList.Count; i++)
{
projectFilesList[i] = projectFilesList[i].Substring(vcs.GetFileSystemRoot().Length);
}
foreach (String filePath in simpleChanges)
{
if (projectFilesList.Contains(filePath))
{
conflictingPathsOnServerSet.Add(filePath);
conflictingPathsOnClientSet.Add(filePath);
}
}
for (int i = 0; i < complexChanges.Length; i++)
{
if (projectFilesList.Contains(complexChanges[i, 0]))
{
conflictingPathsOnServerSet.Add(complexChanges[i, 0]);
conflictingPathsOnClientSet.Add(complexChanges[i, 1]);
}
}
// If no conflicts arises we can save the change to the file system
if (conflictingPathsOnServerSet.Count == 0)
{
SaveChanges(number, user, vcs, ChangeParser.ParseChanges(log));
}
else // Otherwise we find the conflicting paths and return the contents of the file on the
// server for the client to merge
{
IList<String> conflictingPathsOnServer = new List<string>(conflictingPathsOnServerSet);
IList<String> conflictingPathsOnClient = new List<string>(conflictingPathsOnClientSet);
var list = new List<string[]>();
for (int i = 0; i < conflictingPathsOnServer.Count; i++)
{
var fileList = new List<string>() { conflictingPathsOnClient[i] };
fileList.AddRange(vcs.ReadAllLines(conflictingPathsOnServer[i]));
list.Add(fileList.ToArray());
}
returnArray = list.ToArray();
}
}
// Save the last MAC adress
_lastPushUser = user.Name;
//AddToPushHistory(user);
// Return the conflicts to the client
return returnArray;
}
/// <summary>
/// Get the logs containing changes for the specified versions
/// </summary>
/// <param name="path">The relative path to the project root</param>
/// <param name="from">The version number from</param>
/// <param name="to">The version number to</param>
/// <returns></returns>
public String[][] GetVersions(String path, int from, int to)
{
var vcs = new ServerVersionControlSystem(path, _fileSystem);
IEnumerable<int> enu = Enumerable.Range(from, to - from + 1);
IEnumerable<String[]> esu = enu.Select(vcs.GetVersionLog);
return new List<string[]>(esu).ToArray();
}
