private IEnumerable <ThreadMessage> TrimAndSortMessages(IEnumerable <ThreadMessage> messages, Enumerations.ChatOrder order, DateTime startDateTime = default(DateTime))
{
if (startDateTime != default(DateTime))
{
var dateFilteredMessages = messages.TakeWhile(m => m.Date >= startDateTime);
messages = dateFilteredMessages;
}
switch (order)
{
case Enumerations.ChatOrder.Desc:
return(messages);
case Enumerations.ChatOrder.Asc:
default:
return(messages.OrderBy(m => m.Date));
}
}
/// <summary>
/// Gets the last chatbot's messages in a specific thread.
/// </summary>
/// <param name="userIdentity">User to recover messages</param>
/// <param name="order"></param>
/// <param name="logger"></param>
/// <param name="cancellationToken"></param>
/// <param name="startDateTime">Date and time for first message</param>
/// <returns><c>IEnumerable</c> of Lime ThreadMessages</returns>
/// <exception cref="BlipHttpClientException">Failure getting chat history</exception>
/// <exception cref="Exception">Unknown error</exception>
public async Task <IEnumerable <ThreadMessage> > GetHistoryAsync(Identity userIdentity, Enumerations.ChatOrder order, ILogger logger, CancellationToken cancellationToken = default(CancellationToken), DateTime startDateTime = default(DateTime))
{
try
{
logger.Information("[GetHistory] Trying to get history for user {@userIdentity}", userIdentity);
var command = new Command
{
Method = CommandMethod.Get,
Uri = new LimeUri($"/threads/{userIdentity}")
};
var threadsResponse = await _sender.ProcessCommandAsync(command, cancellationToken);
if (threadsResponse.Status != CommandStatus.Success || threadsResponse.Resource == null)
{
throw new BlipHttpClientException("Failed to get chat history.", threadsResponse);
}
logger.Information("[GetHistory] Got history for user {@userIdentity}", userIdentity);
logger.Information("[GetHistory] Trying to order and trim history for user {@userIdentity}", userIdentity);
var messages = (threadsResponse.Resource as DocumentCollection)
.Items
.OfType <ThreadMessage>()
.ToArray();
var history = TrimAndSortMessages(messages, order, startDateTime);
logger.Information("[GetHistory] Trimmed and ordered history for user {@userIdentity}: {@history}", userIdentity, history);
return(history);
}
catch (BlipHttpClientException bex)
{
logger.Error(bex, "[GetHistory] Failed to get chat history for user {@userIdentity}", userIdentity);
throw;
}
catch (Exception ex)
{
logger.Error(ex, "[GetHistory] Failed to get chat history for user {@userIdentity}", userIdentity);
throw;
}
}