public LineItemsController()
{
OnDeleteLineItem = context =>
{
var lineItemUri = RoutingHelper.GetLineItemsUri(new HttpContextWrapper(HttpContext.Current), InMemoryDb.ContextId, context.Id);
if (InMemoryDb.LineItem == null || !InMemoryDb.LineItem.Id.Equals(lineItemUri))
{
context.StatusCode = HttpStatusCode.NotFound;
}
else
{
InMemoryDb.LineItem = null;
InMemoryDb.Result = null;
context.StatusCode = HttpStatusCode.OK;
}
return(Task.FromResult <object>(null));
};
OnGetLineItem = context =>
{
var lineItemUri = RoutingHelper.GetLineItemsUri(new HttpContextWrapper(HttpContext.Current), context.ContextId, context.Id);
if (InMemoryDb.LineItem == null || !InMemoryDb.LineItem.Id.Equals(lineItemUri))
{
context.StatusCode = HttpStatusCode.NotFound;
}
else
{
context.LineItem = InMemoryDb.LineItem;
context.StatusCode = HttpStatusCode.OK;
}
return(Task.FromResult <object>(null));
};
OnGetLineItemWithResults = context =>
{
OnGetLineItem(context);
if (context.LineItem != null && InMemoryDb.Result != null)
{
context.LineItem.Result = InMemoryDb.Result == null ? new LisResult[] {} : new[] { InMemoryDb.Result };
}
return(Task.FromResult <object>(null));
};
OnGetLineItems = context =>
{
context.LineItemContainerPage = new LineItemContainerPage
{
ExternalContextId = LtiConstants.LineItemContainerContextId,
Id = RoutingHelper.GetLineItemsUri(new HttpContextWrapper(HttpContext.Current), context.ContextId),
LineItemContainer = new LineItemContainer
{
MembershipSubject = new LineItemMembershipSubject
{
ContextId = context.ContextId,
LineItems = new LineItem[] { }
}
}
};
if (InMemoryDb.LineItem != null &&
(string.IsNullOrEmpty(context.ActivityId) ||
context.ActivityId.Equals(InMemoryDb.LineItem.AssignedActivity.ActivityId)))
{
context.LineItemContainerPage.LineItemContainer.MembershipSubject.LineItems = new[] { InMemoryDb.LineItem };
}
context.StatusCode = HttpStatusCode.OK;
return(Task.FromResult <object>(null));
};
// Create a LineItem
OnPostLineItem = context =>
{
if (InMemoryDb.LineItem != null)
{
context.StatusCode = HttpStatusCode.BadRequest;
return(Task.FromResult <object>(null));
}
// Normally LineItem.Id would be calculated based on an id assigned by the database
context.LineItem.Id = RoutingHelper.GetLineItemsUri(new HttpContextWrapper(HttpContext.Current), context.ContextId, InMemoryDb.LineItemId);
context.LineItem.Results = RoutingHelper.GetResultsUri(new HttpContextWrapper(HttpContext.Current), context.ContextId, InMemoryDb.LineItemId);
InMemoryDb.LineItem = context.LineItem;
context.StatusCode = HttpStatusCode.Created;
return(Task.FromResult <object>(null));
};
// Update LineItem (but not results)
OnPutLineItem = context =>
{
if (context.LineItem == null || InMemoryDb.LineItem == null || !InMemoryDb.LineItem.Id.Equals(context.LineItem.Id))
{
context.StatusCode = HttpStatusCode.NotFound;
}
else
{
context.LineItem.Result = InMemoryDb.LineItem.Result;
InMemoryDb.LineItem = context.LineItem;
context.StatusCode = HttpStatusCode.OK;
}
return(Task.FromResult <object>(null));
};
// Update LineItem and Result
OnPutLineItemWithResults = context =>
{
if (context.LineItem == null || InMemoryDb.LineItem == null || !InMemoryDb.LineItem.Id.Equals(context.LineItem.Id))
{
context.StatusCode = HttpStatusCode.NotFound;
}
else
{
InMemoryDb.LineItem = context.LineItem;
if (context.LineItem.Result != null && context.LineItem.Result.Length > 0)
{
InMemoryDb.Result = context.LineItem.Result[0];
}
context.StatusCode = HttpStatusCode.OK;
}
return(Task.FromResult <object>(null));
};
}
private string GetResultsServiceUrl(string contextId, string lineItemId, string id = null)
{
var uri = RoutingHelper.GetResultsUri(HttpContext, contextId, lineItemId, id);
return(uri == null ? null : uri.AbsoluteUri);
}
public ResultsController()
{
OnDeleteResult = context =>
{
var resultUri = RoutingHelper.GetResultsUri(new HttpContextWrapper(HttpContext.Current), context.ContextId, context.LineItemId, context.Id);
if (resultUri == null || InMemoryDb.Result == null)
{
context.StatusCode = HttpStatusCode.NotFound;
}
else
{
InMemoryDb.Result = null;
context.StatusCode = HttpStatusCode.OK;
}
return(Task.FromResult <object>(null));
};
OnGetResult = context =>
{
// https://www.imsglobal.org/specs/ltiomv2p0/specification-3
// When a line item is created, a result for each user is deemed to be created with a status value of “Initialized”.
// Thus, there is no need to actually create a result with a POST request; the first connection to a result may be a PUT or a GET request.
var lineItemUri = RoutingHelper.GetLineItemsUri(new HttpContextWrapper(HttpContext.Current), context.ContextId, context.LineItemId);
var resultUri = RoutingHelper.GetResultsUri(new HttpContextWrapper(HttpContext.Current), context.ContextId, context.LineItemId, context.Id);
if (InMemoryDb.LineItem == null || !InMemoryDb.LineItem.Id.Equals(lineItemUri))
{
context.StatusCode = HttpStatusCode.NotFound;
}
else if (InMemoryDb.Result == null || !InMemoryDb.Result.Id.Equals(resultUri))
{
context.Result = new LisResult
{
ExternalContextId = LtiConstants.ResultContextId,
Id = resultUri,
ResultOf = lineItemUri,
ResultStatus = ResultStatus.Initialized
};
context.StatusCode = HttpStatusCode.OK;
}
else
{
context.Result = InMemoryDb.Result;
context.StatusCode = HttpStatusCode.OK;
}
return(Task.FromResult <object>(null));
};
OnGetResults = context =>
{
var lineItemUri = RoutingHelper.GetLineItemsUri(new HttpContextWrapper(HttpContext.Current),
context.ContextId, context.LineItemId);
if (InMemoryDb.LineItem == null || !InMemoryDb.LineItem.Id.Equals(lineItemUri))
{
context.StatusCode = HttpStatusCode.NotFound;
}
else
{
context.ResultContainerPage = new ResultContainerPage
{
ExternalContextId = LtiConstants.ResultContainerContextId,
Id = RoutingHelper.GetResultsUri(new HttpContextWrapper(HttpContext.Current), context.ContextId, context.LineItemId),
ResultContainer = new ResultContainer
{
MembershipSubject = new ResultMembershipSubject
{
Results = InMemoryDb.Result == null ? new LisResult[] {} : new[] { InMemoryDb.Result }
}
}
};
context.StatusCode = HttpStatusCode.OK;
}
return(Task.FromResult <object>(null));
};
OnPostResult = context =>
{
var lineItemUri = RoutingHelper.GetLineItemsUri(new HttpContextWrapper(HttpContext.Current),
context.ContextId, context.LineItemId);
if (InMemoryDb.LineItem == null || !InMemoryDb.LineItem.Id.Equals(lineItemUri))
{
context.StatusCode = HttpStatusCode.BadRequest;
}
else
{
InMemoryDb.Result = context.Result;
InMemoryDb.Result.Id = RoutingHelper.GetResultsUri(new HttpContextWrapper(HttpContext.Current),
context.ContextId, context.LineItemId, InMemoryDb.ResultId);
context.Result = InMemoryDb.Result;
context.StatusCode = HttpStatusCode.Created;
}
return(Task.FromResult <object>(null));
};
OnPutResult = context =>
{
// https://www.imsglobal.org/specs/ltiomv2p0/specification-3
// When a line item is created, a result for each user is deemed to be created with a status value of “Initialized”.
// Thus, there is no need to actually create a result with a POST request; the first connection to a result may be a
// PUT or a GET request.
var lineItemUri = RoutingHelper.GetLineItemsUri(new HttpContextWrapper(HttpContext.Current),
context.ContextId, context.LineItemId);
if (InMemoryDb.LineItem == null || !InMemoryDb.LineItem.Id.Equals(lineItemUri))
{
context.StatusCode = HttpStatusCode.NotFound;
}
else
{
// If this is the first connection, the PUT is equivalent to a POST
InMemoryDb.Result = context.Result;
if (context.Result.Id == null)
{
InMemoryDb.Result.Id =
RoutingHelper.GetResultsUri(new HttpContextWrapper(HttpContext.Current),
context.ContextId, context.LineItemId, InMemoryDb.ResultId);
}
context.StatusCode = HttpStatusCode.OK;
}
return(Task.FromResult <object>(null));
};
}
