public async Task DeleteFile(FolderQuery query, string filename)
{
var folder = await GetFolder(query);
var file = await folder.GetFileAsync(filename);
await file.DeleteAsync();
}
public async Task <Stream?> GetStreamAsync(FolderQuery query, string filename, FileAccess access)
{
var folder = await GetFolder(query);
return(access switch
{
FileAccess.Read => await folder.OpenStreamForReadAsync(filename),
FileAccess.Write => await folder.OpenStreamForWriteAsync(filename, CreationCollisionOption.ReplaceExisting),
_ => null,
});
public Task <Stream?> GetStreamAsync(FolderQuery query, string filename, FileAccess access)
{
if (access == FileAccess.Read)
{
return(Task.FromResult((Stream?)new FileStream(FullFileName(query, filename), FileMode.Open, access)));
}
else
{
return(Task.FromResult((Stream?)new FileStream(FullFileName(query, filename), FileMode.Create, access)));
}
}
private async Task <StorageFolder> GetFolder(FolderQuery query)
{
if (string.IsNullOrEmpty(query.SubFolder))
{
return(folder !);
}
else
{
return(await folder !.CreateFolderAsync(query.SubFolder, CreationCollisionOption.OpenIfExists));
}
}
private string FolderPath(FolderQuery query)
{
string folder;
if (string.IsNullOrEmpty(query.SubFolder))
{
folder = DataPath;
}
else
{
folder = Path.Combine(DataPath, query.SubFolder);
}
if (!Directory.Exists(folder))
{
Directory.CreateDirectory(folder);
}
return(folder);
}
public async Task <string[]> GetFiles(FolderQuery query)
{
var folder = await GetFolder(query);
var queryOptions = new QueryOptions(CommonFileQuery.DefaultQuery, new[] { query.Extension })
{
FolderDepth = FolderDepth.Shallow
};
var queryResult = folder.CreateFileQueryWithOptions(queryOptions);
var files = await queryResult.GetFilesAsync();
var result = new string[files.Count];
for (int i = 0; i < result.Length; ++i)
{
result[i] = files[i].Name;
}
return(result);
}
protected FileDataStore(FolderQuery folder, IDataSerializer <T> dataSerializer)
{
Folder = folder;
this.dataSerializer = dataSerializer;
}
public Task <bool> FileExists(FolderQuery query, string filename)
{
return(Task.FromResult(File.Exists(FullFileName(query, filename))));
}
public Task <string[]> GetFiles(FolderQuery query)
{
var path = FolderPath(query);
return(Task.FromResult(Directory.GetFiles(path, $"*{query.Extension}", SearchOption.TopDirectoryOnly)));
}
public Task DeleteFile(FolderQuery query, string filename)
{
return(Task.Run(() => File.Delete(FullFileName(query, filename))));
}
private string FullFileName(FolderQuery query, string filename)
{
return(Path.Combine(FolderPath(query), filename));
}