public static async Task CopyAsync(this IDataStore store, DocumentAddress sourceAddress, DocumentAddress targetAddress)
{
var source = store.ToChannel(sourceAddress);
var target = store.ToChannel(targetAddress);
if (target.Exists())
{
target.Delete();
}
await source
.GetReadStream()
.CopyToAsync(target.GetWriteStream())
.ConfigureAwait(false);
}
/// <summary>
/// If the document with the specified <paramref name="address"/> does not exist,
/// adds it using the specified <paramref name="addData"/> delegate.
/// Else, returns it.
/// </summary>
public static Task <IResult <TData> > GetOrAddAsync <TData>(
this IDocumentStore source, DocumentAddress address,
Func <TData> addData) where TData : class
{
if (source is null)
{
throw new ArgumentNullException(nameof(source));
}
if (addData is null)
{
throw new ArgumentNullException(nameof(addData));
}
return(source.GetOrAddAsync(
address: address,
addDataAsync: _ => Task.FromResult(addData())
));
}
/// <summary>
/// If the document with the specified <paramref name="address"/> does not exist,
/// adds it using the specified <paramref name="addData"/> delegate.
/// Else, Updates it using the specified <paramref name="updateData"/> delegate.
/// </summary>
public static Task <IResult <TData> > AddOrUpdateAsync <TData>(
this IDocumentStore source, DocumentAddress address,
Func <TData> addData, Func <TData, TData> updateData) where TData : class
{
if (source is null)
{
throw new ArgumentNullException(nameof(source));
}
if (addData is null)
{
throw new ArgumentNullException(nameof(addData));
}
if (updateData is null)
{
throw new ArgumentNullException(nameof(updateData));
}
return(source.AddOrUpdateAsync(
address: address,
addDataAsync: _ => Task.FromResult(addData()),
updateDataAsync: (_, data) => Task.FromResult(updateData(data))
));
}
public static IDataChannel ToChannel(this IDataStore store, DocumentAddress address) => new DataChannel(store, address);
public static async Task MoveAsync(this IDataStore store, DocumentAddress sourceAddress, DocumentAddress targetAddress)
{
await store.CopyAsync(sourceAddress, targetAddress).ConfigureAwait(false);
store.Delete(sourceAddress);
}
