public Transformed(ITextFileInfo source, Func <string, string> trans)
{
Debug.Assert(source.Exists && !source.IsDirectory);
Debug.Assert(trans != null);
_source = source;
_trans = trans;
}
/// <summary>
/// Deletes the file if it exists.
/// </summary>
/// <param name="m">The monitor to use.</param>
public void Delete(IActivityMonitor m)
{
if (GetFile() != null)
{
FileSystem.Delete(m, FilePath);
_file = null;
OnDeleted(m);
}
}
/// <summary>
/// Saves (creates or updates), this file with a new content or calls <see cref="Delete"/>
/// if content is null.
/// If the content is the same as the current <see cref="TextContent"/> the save is skipped.
/// </summary>
/// <param name="m">The monitor to use.</param>
/// <param name="newContent">The content. Null to delete the file.</param>
/// <param name="forceSave">True to always save the file.</param>
/// <returns>True on success, false on error.</returns>
protected bool CreateOrUpdate(IActivityMonitor m, string newContent, bool forceSave = false)
{
string oldContent = GetFile()?.TextContent;
if (oldContent == newContent && !forceSave)
{
return(true);
}
if (newContent == null)
{
Delete(m);
return(true);
}
if (!FileSystem.CopyTo(m, newContent, FilePath, _encoding))
{
return(false);
}
OnSaved(m);
_file = null;
return(true);
}
ITextFileInfo GetFile() => _file ?? (_file = FileSystem.GetFileInfo(FilePath).AsTextFileInfo(ignoreExtension: true));
public static ITextFileInfo WithTransformedText(this ITextFileInfo f, Func <string, string> trans)
{
return(new Transformed(f, trans));
}
