public static ReplacementModel ToReplacementModel(this Replacement replacement)
{
if (replacement == null)
{
return null;
}
ReplacementModel model = new ReplacementModel();
model.DeletedLength = replacement.DeletedLength;
if (!String.IsNullOrEmpty(replacement.InsertedBytes))
{
model.InsertedString = Encoding.UTF8.GetString(Convert.FromBase64String(replacement.InsertedBytes));
model.InsertedBytes = Encoding.UTF8.GetBytes(model.InsertedString);
}
model.Offset = replacement.Offset;
return model;
}
internal bool TryFixFile(string filePath, IEnumerable <ReplacementModel> replacements, bool isPreview, out byte[] fixedFile)
{
fixedFile = null;
if (_fileSystem.FileExists(filePath))
{
// Sort the replacements from top to bottom.
var sortedReplacements = replacements.OrderBy(r => r.Offset);
// Delete/Insert the bytes for each replacement.
List <byte> bytes = _fileSystem.ReadAllBytes(filePath).ToList();
FixOffsetList list = null;
string path = filePath.ToLower();
if (!s_sourceFileFixLedger.ContainsKey(path))
{
// Create a new dictionary entry for this file
list = new FixOffsetList();
s_sourceFileFixLedger.Add(path, list);
}
else
{
list = s_sourceFileFixLedger[path];
}
// Sum all of the changes that have been made up to and including
// the first replacement location
ReplacementModel rm = sortedReplacements.First();
int delta = list.Offsets.Where(kvp => kvp.Key <= rm.Offset)
.Sum(kvp => kvp.Value);
foreach (ReplacementModel replacement in sortedReplacements)
{
int offset = replacement.Offset + delta;
int thisDelta = 0;
if (replacement.DeletedLength > 0)
{
bytes.RemoveRange(offset, replacement.DeletedLength);
thisDelta -= replacement.DeletedLength;
}
if (replacement.InsertedBytes.Length > 0)
{
bytes.InsertRange(offset, replacement.InsertedBytes);
thisDelta += replacement.InsertedBytes.Length;
}
// If it's a preview, don't record the offset changes
if (!isPreview)
{
if (!list.Offsets.ContainsKey(replacement.Offset))
{
// First change at this offset
list.Offsets.Add(replacement.Offset, thisDelta);
}
else
{
// Add to previous change(s) at this location
list.Offsets[replacement.Offset] += thisDelta;
}
}
delta += thisDelta;
}
fixedFile = bytes.ToArray();
}
return(fixedFile != null);
}
