/// <summary>
/// Invokes this middleware component allowing it to perform its work against the supplied context.
/// </summary>
/// <param name="context">The context containing the request passed through the pipeline.</param>
/// <param name="next">The delegate pointing to the next piece of middleware to be invoked.</param>
/// <param name="cancelToken">The cancel token.</param>
/// <returns>Task.</returns>
public Task InvokeAsync(GraphQueryExecutionContext context, GraphMiddlewareInvocationDelegate <GraphQueryExecutionContext> next, CancellationToken cancelToken)
{
// create and attach the result
IResponseFieldSet fieldSet = null;
if (context.FieldResults != null && context.FieldResults.Any())
{
fieldSet = this.CreateFinalDictionary(context);
}
context.Result = new GraphOperationResult(context.Request, context.Messages, fieldSet, context.Metrics);
context.Logger?.RequestCompleted(context);
return(next(context, cancelToken));
}
/// <summary>
/// Initializes a new instance of the <see cref="GraphOperationResult" /> class.
/// </summary>
/// <param name="originalRequest">The original request.</param>
/// <param name="messages">The message collection containing any messages that may
/// have been generated during execution.</param>
/// <param name="dataItem">The top level field set resolved during the operation.</param>
/// <param name="metrics">The metrics package that was filled during the operation execution.</param>
public GraphOperationResult(
IGraphOperationRequest originalRequest,
IEnumerable <IGraphMessage> messages = null,
IResponseFieldSet dataItem = null,
IGraphQueryExecutionMetrics metrics = null)
{
this.Request = originalRequest;
this.Data = dataItem;
this.Messages = new GraphMessageCollection();
if (messages != null)
{
this.Messages.AddRange(messages);
}
this.Metrics = metrics;
}
/// <summary>
/// Walks the the object collection and writes it to the provided writer.
/// </summary>
/// <param name="writer">The json writer to output the reslts to.</param>
/// <param name="data">The dictionary to output to the writer.</param>
private void WriteObjectCollection(Utf8JsonWriter writer, IResponseFieldSet data)
{
if (data == null)
{
writer.WriteNullValue();
}
else
{
writer.WriteStartObject();
foreach (var kvp in data.Fields)
{
writer.WritePropertyName(kvp.Key);
this.WriteResponseItem(writer, kvp.Value);
}
writer.WriteEndObject();
}
}
/// <summary>
/// Sets the completed data response to the result.
/// </summary>
/// <param name="data">The data.</param>
public void SetDataResponse(IResponseFieldSet data)
{
this.Data = data;
}
