private void ValidateDownloadArgs(DownloadArgs downloadArgs)
{
Contracts.NullCheck(downloadArgs.Files);
if (downloadArgs.MaintainSameDirectoryStructure)
{
Contracts.NullCheck(downloadArgs.RootFolderForDownload);
}
else
{
foreach (var file in downloadArgs.Files)
{
Contracts.NullCheck(file.Source);
Contracts.NullCheck(file.Destination);
}
}
}
public void Download(DownloadArgs downloadArgs)
{
ValidateDownloadArgs(downloadArgs);
var files = GetSourceAndDestination(downloadArgs);
var postFetchContentOverride = downloadArgs.PostFetchContentOverride;
foreach (var file in files)
{
var(source, destination) = (file.source, file.destination);
if (downloadArgs.PostFetchContentOverride is null)
{
DownloadFile(source, destination);
}
else
{
var contents = ReadFileAsText(source.ToString());
ApplyTextOverrideAndSaveFile(destination, contents, postFetchContentOverride);
}
if (downloadArgs.ProgressTracker != null)
{
downloadArgs.ProgressTracker((source.ToString(), destination));
}
}
List <(Uri source, string destination)> GetSourceAndDestination(DownloadArgs _args)
{
List <(Uri _source, string _destination)> result = _args.MaintainSameDirectoryStructure switch
{
true => _args.Files.Select(x => (x.Source, GetDestinationFilename(x.Source, _args.RootFolderForDownload))).ToList(),
false => _args.Files
};
return(result);
string GetDestinationFilename(Uri _source, string _rootFoldername)
{
var fullPathExcludingHostname = _source.PathAndQuery;
var result = $@"{_rootFoldername}\{fullPathExcludingHostname}";
return(result);
}
}
void DownloadFile(Uri _source, string _destination)
{
var dir = Path.GetDirectoryName(_destination);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
_webClientInstance.DownloadFile(_source, _destination);
}
void ApplyTextOverrideAndSaveFile(string _destination, string _contents, Func <string, string> func)
{
var overrideContents = func(_contents);
var dir = Path.GetDirectoryName(_destination);
if (!Directory.Exists(dir))
{
Directory.CreateDirectory(dir);
}
File.WriteAllText(_destination, overrideContents);
}
}