public CreateEditAssignmentModel(Assignment assignment)
{
AssignmentId = assignment.AssignmentId;
ConsumerKey = assignment.ConsumerKey;
ConsumerSecret = assignment.ConsumerSecret;
CourseId = assignment.Course.CourseId;
CustomParameters = assignment.CustomParameters;
Description = assignment.Description;
Name = assignment.Name;
Url = assignment.Url;
}
public ActionResult Create(CreateEditAssignmentModel model)
{
if (ModelState.IsValid)
{
var course = ConsumerContext.Courses.Find(model.CourseId);
var assignment = new Assignment
{
ConsumerKey = model.ConsumerKey,
ConsumerSecret = model.ConsumerSecret,
Course = course,
CustomParameters = model.CustomParameters,
Description = model.Description,
Name = model.Name,
Url = model.Url
};
ConsumerContext.Assignments.Add(assignment);
ConsumerContext.SaveChanges();
return RedirectToAction("Details", "Course", new { id = model.CourseId });
}
return View(model);
}
/// <summary>
/// Create a basic launch request for the assignment.
/// </summary>
/// <param name="request">The browser request.</param>
/// <param name="assignment">The assignment to launch.</param>
/// <param name="user">The user that is launching the assignment.</param>
/// <returns>An LtiRequestViewModel which can be displayed by the View in such
/// a way that the browser will invoke the LTI launch.</returns>
public static LtiRequestViewModel CreateBasicLaunchRequestViewModel(HttpRequestBase request, Assignment assignment, ApplicationUser user)
{
var ltiRequest = new LtiRequest(LtiConstants.BasicLaunchLtiMessageType)
{
ConsumerKey = assignment.ConsumerKey,
ResourceLinkId = assignment.AssignmentId.ToString(CultureInfo.InvariantCulture),
Url = new Uri(assignment.Url)
};
var course = assignment.Course;
// Tool
ltiRequest.ToolConsumerInfoProductFamilyCode = Assembly.GetExecutingAssembly().GetName().Name;
ltiRequest.ToolConsumerInfoVersion = Assembly.GetExecutingAssembly().GetName().Version.ToString();
// Context
ltiRequest.ContextId = course.CourseId.ToString(CultureInfo.InvariantCulture);
ltiRequest.ContextTitle = course.Name;
ltiRequest.ContextType = course.EnrolledUsers.Any(u => u.Id == user.Id)
? LisContextType.CourseSection
: LisContextType.CourseTemplate;
// Instance
ltiRequest.ToolConsumerInstanceGuid = "~/".ToAbsoluteUrl();
var title = Assembly.GetExecutingAssembly().GetCustomAttributes<AssemblyTitleAttribute>().FirstOrDefault();
ltiRequest.ToolConsumerInstanceName = title == null ? null : title.Title;
ltiRequest.ResourceLinkTitle = assignment.Name;
ltiRequest.ResourceLinkDescription = assignment.Description;
// User
if (user.SendEmail.GetValueOrDefault(true))
{
ltiRequest.LisPersonEmailPrimary = user.Email;
}
if (user.SendName.GetValueOrDefault(true))
{
ltiRequest.LisPersonNameFamily = user.LastName;
ltiRequest.LisPersonNameGiven = user.FirstName;
}
ltiRequest.UserId = user.Id;
ltiRequest.UserName = user.UserName;
ltiRequest.SetRoles(GetLtiRolesForUser(user));
// Outcomes service
if (course.EnrolledUsers.Any(u => u.Id == user.Id))
{
var outcomesUrl = UrlHelper.GenerateUrl("DefaultApi", null, "Outcomes",
new RouteValueDictionary { { "httproute", string.Empty } }, RouteTable.Routes,
request.RequestContext, false);
Uri outcomesUri;
if (Uri.TryCreate(request.Url, outcomesUrl, out outcomesUri))
{
ltiRequest.LisOutcomeServiceUrl = outcomesUri.AbsoluteUri;
}
ltiRequest.LisResultSourcedId =
JsonConvert.SerializeObject(new LisResultSourcedId
{
AssignmentId = assignment.AssignmentId,
UserId = user.Id
});
}
// Tool Consumer Profile service
var profileUrl = UrlHelper.GenerateUrl("DefaultApi", null, "ToolConsumerProfile",
new RouteValueDictionary { { "httproute", string.Empty } }, RouteTable.Routes,
request.RequestContext, false);
Uri profileUri;
if (Uri.TryCreate(request.Url, profileUrl, out profileUri))
{
ltiRequest.ToolConsumerProfileUrl = profileUri.AbsoluteUri;
}
// Add the custom parameters. This consumer supports 3 special substitutions.
var customParameters = assignment.CustomParameters;
if (!string.IsNullOrWhiteSpace(customParameters))
{
ltiRequest.AddCustomParameters(customParameters);
}
return ltiRequest.GetViewModel(assignment.ConsumerSecret);
}
public ActionResult PlaceContentItem(LtiRequest model)
{
var ltiMessageType = model.LtiMessageType;
if (!string.IsNullOrEmpty(ltiMessageType) &&
!ltiMessageType.Equals(LtiConstants.ContentItemSelectionLtiMessageType))
{
return RedirectToAction("BadRequest", "Error", new { error = "Unknown LTI message" });
}
var ltiResponse = (IContentItemSelection)model;
var data = JsonConvert.DeserializeObject<ContentItemData>(ltiResponse.Data);
var contentItemTool = ConsumerContext.ContentItemTools.Find(data.ContentItemToolId);
if (contentItemTool == null)
{
return RedirectToAction("BadRequest", "Error", new { error = "Invalid content item tool id" });
}
var course = ConsumerContext.Courses.Find(data.CourseId);
if (course == null)
{
return RedirectToAction("BadRequest", "Error", new { error = "Invalid course id" });
}
var contentItems = JsonConvert.DeserializeObject<ContentItemSelectionGraph>(ltiResponse.ContentItems);
foreach (var contentItem in contentItems.Graph)
{
if (contentItem.Type == LtiConstants.LtiLinkType)
{
var custom = new StringBuilder();
foreach (var key in contentItem.Custom.Keys)
{
custom.AppendFormat("{0}={1}\n", key, contentItem.Custom[key]);
}
var assignment = new Assignment
{
ConsumerKey = contentItemTool.ConsumerKey,
Course = course,
ConsumerSecret = contentItemTool.ConsumerSecret,
CustomParameters = custom.ToString(),
Description = contentItem.Text,
Name = contentItem.Title,
Url = (contentItem.Id ?? new Uri(contentItemTool.Url)).AbsoluteUri
};
ConsumerContext.Assignments.Add(assignment);
}
}
ConsumerContext.SaveChanges();
return RedirectToAction("Details", "Course", new { id = data.CourseId });
}
public ScoredAssignmentModel(Assignment assignment)
{
AssignmentId = assignment.AssignmentId;
Course = assignment.Course;
Description = assignment.Description;
Name = assignment.Name;
Url = assignment.Url;
}
