/// <summary>
/// Parses the changes into change objects.
/// </summary>
/// <param name="text">The text to parse change objects from.</param>
/// <returns>A list of change objects. NOTE: If no items have been deleted, index = 0 will be null. If no items have been created, index = 1 will be null</returns>
public static IList<AbstractChange> ParseChanges(String[] text)
{
if (text.Any(s => s == null)) throw new ArgumentNullException("text");
if (!text.Any()) throw new ArgumentException("Argument was empty");
IList<AbstractChange> parsedChanges = new List<AbstractChange>();
ItemsCreatedChange itemsCreated = null;
ItemsDeletedChange itemsDeleted = null;
parsedChanges.Add(itemsDeleted);
parsedChanges.Add(itemsCreated);
int pointer = 0;
while (pointer < text.Length)
{
if (text[pointer].StartsWith(AbstractChange.ItemCreationMark))
{ // An item has been created
if (parsedChanges[1] == null)
{
parsedChanges[1] = new ItemsCreatedChange();
}
// The item is a folder
if (text[pointer].EndsWith(FileSystem.PathSeparator))
{
if (parsedChanges[1] is ItemsCreatedChange)
{
((ItemsCreatedChange)parsedChanges[1]).CreateItem(new FolderCreation(text[pointer].Substring(AbstractChange.ItemCreationMark.Length)));
}
pointer++;
}
else
{
IList<String> fileContents = new List<string>();
String createdFilePath = text[pointer].Substring(AbstractChange.ItemCreationMark.Length);
pointer++;
while (pointer < text.Length)
{
// No more modifications for this file
if (text[pointer].Equals(AbstractChange.BlockSeparatorMark)) break;
// Line insertion
if (text[pointer].StartsWith(AbstractChange.LineInsertionMark))
{
String lineNumber = text[pointer].Substring(AbstractChange.LineInsertionMark.Length);
int tmp = lineNumber.IndexOf(AbstractChange.LineInsertionMark);
String line = lineNumber.Substring(tmp + AbstractChange.LineInsertionMark.Length);
fileContents.Add(line);
pointer++;
}
}
if (parsedChanges[1] is ItemsCreatedChange)
{
((ItemsCreatedChange)parsedChanges[1]).CreateItem(new FileCreation(createdFilePath, fileContents.ToArray()));
}
}
}
else if (text[pointer].StartsWith(AbstractChange.ItemDeletionMark))
{
// An item has been deleted
String path = text[pointer].Substring(AbstractChange.ItemDeletionMark.Length);
if (parsedChanges[0] == null)
{
parsedChanges[0] = new ItemsDeletedChange();
}
if (parsedChanges[0] is ItemsDeletedChange)
{
((ItemsDeletedChange)parsedChanges[0]).DeleteItem(path);
}
pointer++;
}
else if (text[pointer].StartsWith(AbstractChange.ItemModificationMark))
{
// A file has been modified
String path = text[pointer].Substring(AbstractChange.ItemModificationMark.Length);
FileModifiedChange modified = new FileModifiedChange(path);
pointer++;
// Iterate through the file modifications until there are no more (end of file or linebreak)
while (pointer < text.Length)
{
// No more modifications for this file
if (text[pointer].Equals(AbstractChange.BlockSeparatorMark)) break;
// Line insertion
if (text[pointer].StartsWith(AbstractChange.LineInsertionMark))
{
String lineNumber = text[pointer].Substring(AbstractChange.LineInsertionMark.Length);
int tmp = lineNumber.IndexOf(AbstractChange.LineInsertionMark);
int number = int.Parse(lineNumber.Substring(0, tmp));
String line = lineNumber.Substring(tmp + AbstractChange.LineInsertionMark.Length);
modified.AddInsertion(number, line);
pointer++;
}
// Line deletion
if (text[pointer].StartsWith(AbstractChange.LineDeletionMark))
{
String lineNumber = text[pointer].Substring(AbstractChange.LineDeletionMark.Length);
int tmp = lineNumber.IndexOf(AbstractChange.LineDeletionMark);
int number = int.Parse(lineNumber.Substring(0, tmp));
String line = lineNumber.Substring(tmp + AbstractChange.LineDeletionMark.Length);
modified.AddDeletion(number, line);
pointer++;
}
}
parsedChanges.Add(modified);
}
if (pointer < text.Length && text[pointer].Equals(AbstractChange.BlockSeparatorMark))
{ // Current line is empty
pointer++;
}
}
return parsedChanges;
}
/// <summary>
/// Compares the file modifications.
/// </summary>
/// <param name="relativePath">The relative path to the original file with respect to this version control system.</param>
/// <param name="originalText">The original text.</param>
/// <param name="latestText">The latest text.</param>
/// <returns></returns>
public static FileModifiedChange CompareFileModifications(String relativePath, string[] originalText, string[] latestText)
{
FileModifiedChange fileModified = new FileModifiedChange(relativePath);
Contract.Requires(originalText != null && latestText != null);
Contract.Requires(originalText.Length > 0 || latestText.Length > 0);
int o = 0;
int n = 0;
while (o <= originalText.Length && n <= latestText.Length)
{
if (o == originalText.Length && n == latestText.Length)
{ // Both o and n point beyond their respective arrays. No more to merge
break;
}
else if (o == originalText.Length && n != latestText.Length)
{ // All remaining lines in latestText are new
for (int i = n; i < latestText.Length; i++)
{
fileModified.AddInsertion(i, latestText[i]);
}
break;
}
else if (o != originalText.Length && n == latestText.Length)
{ // The rest of lines in originalText have been removed
for (; o < originalText.Length; o++)
{
fileModified.AddDeletion(o, originalText[o]);
}
break;
}
else if (originalText[o].Equals(latestText[n]))
{ // No changes have occured at this line
o++;
n++;
}
else if (!originalText[o].Equals(latestText[n]))
{ // A line has changed
bool found = false;
// Search all lines in latestText[t..end] for originalText[o]
int t = n + 1;
for (; t < latestText.Length; t++)
{
// Search was successfull
if (originalText[o].Equals(latestText[t]))
{
found = true;
break;
}
}
if (!found)
{ // Line has been deleted
fileModified.AddDeletion(o, originalText[o]);
o++;
}
else
{ // Lines in latestText[n..t] was added
for (; n < t; n++)
{
fileModified.AddInsertion(n, latestText[n]);
}
n++;
o++;
}
}
}
return fileModified;
}
/// <summary>
/// Tries to save the folder according to the info shown in the view.
/// If the folder can't be renamed or moved the change wont take effect.
/// And the user is sent back to the info.aspx page
/// </summary>
protected void SaveChanges(object sender, EventArgs e)
{
string oldFolderName = _path.Substring(0, _path.LastIndexOf(@"\"));
string newName = NameTextBox.Text;
bool hasBeenMoved = !oldFolderName.Equals(FolderDropDown.SelectedItem.ToString());
bool hasBeenRenamed = !_name.Equals(newName);
var vsc = VersionSystemFacade.GetVersionControlSystem(_path.Substring(4));
if (hasBeenRenamed)
{
FileModifiedChange modification = new FileModifiedChange(VersionSystemFacade.GetPathRelativeToRepository(_absolutPath));
modification.Rename(newName + "\\");
if (vsc.Save(modification) != null)
{
base.ShowWarning();
Response.Redirect("Info.aspx?path=" + _path);
}
}
// respond URI is the orignal path (but might be with a new name)
_responeUri = "info.aspx?path=Pie\\" + newName;
if (hasBeenMoved)
{
string newFolder = FolderDropDown.SelectedItem.ToString().Substring(3) + @"\";
List<AbstractChange> fileMovedChanges = new List<AbstractChange>();
ICollection<AbstractChange> moveChanges = base.MoveFolder(_path.Substring(3), (newFolder + newName));
fileMovedChanges.AddRange(moveChanges);
// Adds the move-changes to the version control system.
// Sets the respond URI.
if (vsc.Save(fileMovedChanges).Any())
{
// If there was any errors while moving (returned a not-empty collction),
// respond URI is the orignal path (but might be with a new name).
_responeUri = "info.aspx?path=Pie\\" + newName;
}
else
{
// Else the respond URI is the new path.
_responeUri = "info.aspx?path=Pie\\" + newFolder + newName;
}
}
// Redirect to view the info.aspx page, for the current file.
Response.Redirect(_responeUri);
}
