private void WriteToPackageList(Func <FileStream> packageListOpenStream, Action <PackageList> actionToPerformOnPackageList)
{
FileStream fileStream;
bool fileExists = true;
try
{
fileStream = packageListOpenStream.Invoke();
}
catch (FileNotFoundException)
{
string packageListFileName = GetPackageListFilePath();
fileStream = File.Open(packageListFileName, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.None);
fileExists = false;
}
using (fileStream)
{
PackageList packageList;
if (fileExists)
{
packageList = LoadPackageList(fileStream);
}
else
{
packageList = PackageList.CreateNewPackageList();
}
actionToPerformOnPackageList.Invoke(packageList);
fileStream.SetLength(0);
packageList.Save(fileStream);
}
}
private PackageList LoadPackageList(FileStream fileStream)
{
PackageList packageList;
try
{
packageList = PackageList.Load(fileStream, packageListMigrations);
}
catch (Exception e)
{
throw new InvalidOperationException($"Reading of package list from '{fileStream.Name}' failed: {e.Message}", e);
}
return(packageList);
}
internal IPackageInfo GetSinglePackageInfo(string packageId, ListMode listMode)
{
try
{
using (FileStream fileStream = OpenPackageListForReadOperation())
{
PackageList packageList = LoadPackageList(fileStream);
IPackageInfo packageInfo = packageList.FetchSinglePackageListInfo(packageId, listMode);
return(packageInfo);
}
}
catch (FileNotFoundException)
{
return(null);
}
}
// TODO For MatchMode.All the searchPattern is useless
public IReadOnlyCollection <IPackageInfo> GetPackageInfo(string searchPattern, ListMode listMode, MatchMode matchMode)
{
try
{
using (FileStream fileStream = OpenPackageListForReadOperation())
{
PackageList packageList = LoadPackageList(fileStream);
var packageInfos = packageList.FetchPackageListInfo(searchPattern, listMode, matchMode);
return(packageInfos);
}
}
catch (FileNotFoundException)
{
return(null);
}
}