public async Task <Response> Get(
GetStreamMetadataOperation operation,
CancellationToken cancellationToken)
{
var result = await operation.Invoke(_streamStore, cancellationToken);
var response = new HalJsonResponse(new HALResponse(new
{
result.StreamId,
result.MetadataStreamVersion,
result.MaxAge,
result.MaxCount,
result.MetadataJson
})
.AddLinks(
Links
.FromOperation(operation)
.Index()
.Find()
.Browse()
.StreamMetadataNavigation(operation))
.AddEmbeddedResource(
Constants.Relations.Metadata,
metadata),
result.MetadataStreamVersion >= 0 ? 200 : 404)
{
Headers =
{
ETag.FromStreamVersion(result.MetadataStreamVersion)
}
};
return(response);
}
public async Task <Response> Post(
AppendStreamOperation operation,
CancellationToken cancellationToken)
{
if (operation.ExpectedVersion < Constants.Headers.MinimumExpectedVersion)
{
return(new HalJsonResponse(new HALResponse(new
{
type = typeof(WrongExpectedVersionException).Name,
title = "Wrong expected version.",
detail =
$"Expected header '{Constants.Headers.ExpectedVersion}' to have an expected version => {ExpectedVersion.NoStream}."
}),
400));
}
var result = await operation.Invoke(_streamStore, cancellationToken);
var links = Links
.FromOperation(operation)
.Index()
.Find()
.Browse()
.Add(Constants.Relations.Feed, LinkFormatter.Stream(operation.StreamId)).Self();
var response = new HalJsonResponse(
new HALResponse(result)
.AddLinks(links),
operation.ExpectedVersion == ExpectedVersion.NoStream
? 201
: 200);
if (response.StatusCode == 201)
{
response.Headers[Constants.Headers.Location] =
new[] { $"{_relativePathToRoot}{LinkFormatter.Stream(operation.StreamId)}" };
}
return(response);
}
public async Task <Response> Post(
SetStreamMetadataOperation operation,
CancellationToken cancellationToken)
{
await operation.Invoke(_streamStore, cancellationToken);
var response = new HalJsonResponse(new HALResponse(new
{
operation.StreamId,
operation.MaxAge,
operation.MaxCount,
operation.MetadataJson
})
.AddLinks(
Links
.FromOperation(operation)
.Index()
.Find()
.StreamMetadataNavigation(operation)));
return(response);
}
public async Task <Response> Get(ReadStreamOperation operation, CancellationToken cancellationToken)
{
if (_useCanonicalUrls && !operation.IsUriCanonical)
{
return(new PermanentRedirectResponse($"../{operation.Self}"));
}
var page = await operation.Invoke(_streamStore, cancellationToken);
var streamMessages = page.Messages.OrderByDescending(m => m.Position).ToArray();
var payloads = await Task.WhenAll(
Array.ConvertAll(
streamMessages,
message => operation.EmbedPayload
? message.GetJsonData(cancellationToken)
: SkippedPayload.Instance));
var response = new HalJsonResponse(
new HALResponse(new
{
page.LastStreamVersion,
page.LastStreamPosition,
page.FromStreamVersion,
page.NextStreamVersion,
page.IsEnd
})
.AddLinks(Links
.FromOperation(operation)
.Index()
.Find()
.Browse()
.StreamsNavigation(page, operation))
.AddEmbeddedResource(
Constants.Relations.AppendToStream,
append)
.AddEmbeddedResource(
Constants.Relations.DeleteStream,
delete)
.AddEmbeddedCollection(
Constants.Relations.Message,
streamMessages.Zip(
payloads,
(message, payload) => new StreamMessageHALResponse(message, payload)
.AddLinks(
Links
.FromOperation(operation)
.Add(
Constants.Relations.Message,
LinkFormatter.StreamMessageByStreamVersion(
message.StreamId,
message.StreamVersion),
$"{message.StreamId}@{message.StreamVersion}")
.Self()
.Add(
Constants.Relations.Feed,
LinkFormatter.Stream(message.StreamId),
message.StreamId)))),
page.Status == PageReadStatus.StreamNotFound ? 404 : 200);
if (page.TryGetETag(out var eTag))
{
response.Headers.Add(eTag);
}
return(response);
}
public async Task <Response> Get(
ReadAllStreamOperation operation,
CancellationToken cancellationToken)
{
if (_useCanonicalUrls && !operation.IsUriCanonical)
{
return(new HalJsonResponse(new HALResponse(null), 308)
{
Headers = { [Constants.Headers.Location] = new[] { operation.Self } }
});
}
var page = await operation.Invoke(_streamStore, cancellationToken);
var streamMessages = page.Messages.OrderByDescending(m => m.Position).ToArray();
var payloads = await Task.WhenAll(
Array.ConvertAll(
streamMessages,
message => operation.EmbedPayload
? message.GetJsonData(cancellationToken)
: SkippedPayload.Instance));
var response = new HalJsonResponse(
new HALResponse(new
{
page.FromPosition,
page.NextPosition,
page.IsEnd
})
.AddLinks(
Links
.FromOperation(operation)
.Index()
.Find()
.Browse()
.AllStreamNavigation(page, operation))
.AddEmbeddedCollection(
Constants.Relations.Message,
streamMessages.Zip(
payloads,
(message, payload) => new StreamMessageHALResponse(message, payload)
.AddLinks(
Links
.FromOperation(operation)
.Add(
Constants.Relations.Message,
LinkFormatter.StreamMessageByStreamVersion(message.StreamId, message.StreamVersion),
$"{message.StreamId}@{message.StreamVersion}")
.Self()
.Add(
Constants.Relations.Feed,
LinkFormatter.Stream(message.StreamId),
message.StreamId)))));
if (operation.FromPositionInclusive == Position.End)
{
var headPosition = streamMessages.Length > 0
? streamMessages[0].Position
: Position.End;
response.Headers[Constants.Headers.HeadPosition] = new[] { $"{headPosition}" };
}
if (page.TryGetETag(operation.FromPositionInclusive, out var eTag))
{
response.Headers.Add(eTag);
response.Headers.Add(CacheControl.NoCache);
}
else
{
response.Headers.Add(CacheControl.OneYear);
}
return(response);
}
public async Task <Response> Get(ReadStreamOperation operation, CancellationToken cancellationToken)
{
if (!operation.IsUriCanonical)
{
return(new HalJsonResponse(new HALResponse(null), 308)
{
Headers = { [Constants.Headers.Location] = new[] { $"../{operation.Self}" } }
});
}
var page = await operation.Invoke(_streamStore, cancellationToken);
var streamMessages = page.Messages.OrderByDescending(m => m.Position).ToArray();
var payloads = await Task.WhenAll(
Array.ConvertAll(
streamMessages,
message => operation.EmbedPayload
? message.GetJsonData(cancellationToken)
: SkippedPayload.Instance));
var response = new HalJsonResponse(
new HALResponse(new
{
page.LastStreamVersion,
page.LastStreamPosition,
page.FromStreamVersion,
page.NextStreamVersion,
page.IsEnd
})
.AddLinks(Links
.FromOperation(operation)
.Index()
.Find()
.Browse()
.StreamsNavigation(page, operation))
.AddEmbeddedResource(
Constants.Relations.AppendToStream,
append)
.AddEmbeddedResource(
Constants.Relations.DeleteStream,
delete)
.AddEmbeddedCollection(
Constants.Relations.Message,
streamMessages.Zip(
payloads,
(message, payload) => new HALResponse(new
{
message.MessageId,
message.CreatedUtc,
message.Position,
message.StreamId,
message.StreamVersion,
message.Type,
payload,
metadata = message.JsonMetadata
})
.AddLinks(
Links
.FromOperation(operation)
.Add(
Constants.Relations.Message,
$"{Constants.Streams.Stream}/{message.StreamId}/{message.StreamVersion}",
$"{message.StreamId}@{message.StreamVersion}")
.Self()
.Add(
Constants.Relations.Feed,
$"streams/{message.StreamId}",
message.StreamId)))),
page.Status == PageReadStatus.StreamNotFound ? 404 : 200);
if (page.TryGetETag(out var eTag))
{
response.Headers.Add(eTag);
}
return(response);
}