public async Task <IActionResult> OnPostAsync()
{
if (ResourceLink.CustomProperties.IsPresent())
{
if (!ResourceLink.CustomProperties.TryConvertToDictionary(out _))
{
ModelState.AddModelError(
$"{nameof(Tool)}.{nameof(Tool.CustomProperties)}",
"Cannot parse the Custom Properties.");
}
}
if (!ModelState.IsValid)
{
return(Page());
}
var user = await _context.GetUserFullAsync(User);
var tool = await _context.Tools.FindAsync(ResourceLink.ToolId);
// Add the resource link to the course
var resourceLink = ResourceLink.ToResourceLink(tool);
user.Course.ResourceLinks.Add(resourceLink);
// And add a gradebook column to the course
var gradebookColumn = new GradebookColumn
{
EndDateTime = DateTime.UtcNow.AddMonths(3),
Label = ResourceLink.Title,
ResourceLink = resourceLink,
ScoreMaximum = 100,
StartDateTime = DateTime.UtcNow,
Tag = tool.Name
};
user.Course.GradebookColumns.Add(gradebookColumn);
await _context.SaveChangesAsync();
return(RedirectToPage("./Index"));
}
/// <inheritdoc />
/// <summary>
/// Adds a gradebook column to a course.
/// </summary>
/// <returns>The line item corresponding to the new gradebook column.</returns>
protected override async Task <ActionResult <LineItem> > OnAddLineItemAsync(AddLineItemRequest request)
{
if (!int.TryParse(request.ContextId, out var contextId))
{
var name = $"{nameof(request)}.{nameof(request.ContextId)}";
ModelState.AddModelError(name, $"The {name} field cannot be converted into a course id.");
return(BadRequest(new ValidationProblemDetails(ModelState)));
}
if (!await _courseValidator.UserHasAccess(contextId))
{
return(Unauthorized(new ProblemDetails
{
Title = "Not authorized",
Detail = "User not authorized to access the requested course."
}));
}
var course = await _context.GetCourseAsync(contextId);
if (course == null)
{
return(NotFound(new ProblemDetails
{
Title = ReasonPhrases.GetReasonPhrase(StatusCodes.Status404NotFound),
Detail = "Course not found"
}));
}
// Add a gradebook column to the course
var gradebookColumn = new GradebookColumn
{
EndDateTime = request.LineItem.EndDateTime,
Label = request.LineItem.Label,
ScoreMaximum = request.LineItem.ScoreMaximum,
StartDateTime = request.LineItem.StartDateTime,
Tag = request.LineItem.Tag
};
if (request.LineItem.ResourceLinkId.IsPresent())
{
if (!int.TryParse(request.LineItem.ResourceLinkId, out var resourceLinkId))
{
var name = $"{nameof(request)}.{nameof(request.LineItem.ResourceLinkId)}";
ModelState.AddModelError(name, $"The {name} field cannot be converted into a resource link id.");
return(BadRequest(new ValidationProblemDetails(ModelState)));
}
var resourceLink = await _context.GetResourceLinkAsync(resourceLinkId);
if (resourceLink == null)
{
var name = $"{nameof(request)}.{nameof(request.LineItem)}.{request.LineItem.ResourceLinkId}";
ModelState.AddModelError(name, $"The {name} field is not a valid resource link id.");
return(BadRequest(new ValidationProblemDetails(ModelState)));
}
gradebookColumn.ResourceLink = resourceLink;
}
course.GradebookColumns.Add(gradebookColumn);
await _context.SaveChangesAsync();
request.LineItem.Id = Url.Link(LtiAdvantage.Constants.ServiceEndpoints.Ags.LineItemService,
new { contextId = request.ContextId, lineItemId = gradebookColumn.Id });
return(Created(request.LineItem.Id, request.LineItem));
}
/// <summary>
/// Returns the LTI claims for an LtiResourceLinkRequest.
/// </summary>
/// <param name="resourceLink">The resource link.</param>
/// <param name="gradebookColumn">The gradebool column for this resource link.</param>
/// <param name="person">The person being authorized.</param>
/// <param name="course">The course (can be null).</param>
/// <param name="platform">The platform.</param>
/// <returns></returns>
private List <Claim> GetResourceLinkRequestClaims(
ResourceLink resourceLink,
GradebookColumn gradebookColumn,
Person person,
Course course,
Platform platform)
{
var httpRequest = _httpContextAccessor.HttpContext.Request;
var request = new LtiResourceLinkRequest
{
DeploymentId = resourceLink.Tool.DeploymentId,
FamilyName = person.LastName,
GivenName = person.FirstName,
LaunchPresentation = new LaunchPresentationClaimValueType
{
DocumentTarget = DocumentTarget.Window,
Locale = CultureInfo.CurrentUICulture.Name,
ReturnUrl = $"{httpRequest.Scheme}://{httpRequest.Host}"
},
Lis = new LisClaimValueType
{
PersonSourcedId = person.SisId,
CourseSectionSourcedId = course?.SisId
},
Lti11LegacyUserId = person.Id.ToString(),
Platform = new PlatformClaimValueType
{
ContactEmail = platform.ContactEmail,
Description = platform.Description,
Guid = platform.Id.ToString(),
Name = platform.Name,
ProductFamilyCode = platform.ProductFamilyCode,
Url = platform.Url,
Version = platform.Version
},
ResourceLink = new ResourceLinkClaimValueType
{
Id = resourceLink.Id.ToString(),
Title = resourceLink.Title,
Description = resourceLink.Description
},
Roles = PeopleModel.ParsePersonRoles(person.Roles),
TargetLinkUri = resourceLink.Tool.LaunchUrl
};
// Add the context if the launch is from a course.
if (course == null)
{
// Remove context roles
request.Roles = request.Roles.Where(r => !r.ToString().StartsWith("Context")).ToArray();
}
else
{
request.Context = new ContextClaimValueType
{
Id = course.Id.ToString(),
Title = course.Name,
Type = new[] { ContextType.CourseSection }
};
request.AssignmentGradeServices = new AssignmentGradeServicesClaimValueType
{
Scope = new List <string>
{
Constants.LtiScopes.Ags.LineItem
},
LineItemUrl = gradebookColumn == null ? null : _linkGenerator.GetUriByRouteValues(Constants.ServiceEndpoints.Ags.LineItemService,
new { contextId = course.Id, lineItemId = gradebookColumn.Id }, httpRequest.Scheme, httpRequest.Host),
LineItemsUrl = _linkGenerator.GetUriByRouteValues(Constants.ServiceEndpoints.Ags.LineItemsService,
new { contextId = course.Id }, httpRequest.Scheme, httpRequest.Host)
};
request.NamesRoleService = new NamesRoleServiceClaimValueType
{
ContextMembershipUrl = _linkGenerator.GetUriByRouteValues(Constants.ServiceEndpoints.Nrps.MembershipService,
new { contextId = course.Id }, httpRequest.Scheme, httpRequest.Host)
};
}
// Collect custom properties
if (!resourceLink.Tool.CustomProperties.TryConvertToDictionary(out var custom))
{
custom = new Dictionary <string, string>();
}
if (resourceLink.CustomProperties.TryConvertToDictionary(out var linkDictionary))
{
foreach (var property in linkDictionary)
{
if (custom.ContainsKey(property.Key))
{
custom[property.Key] = property.Value;
}
else
{
custom.Add(property.Key, property.Value);
}
}
}
// Prepare for custom property substitutions
var substitutions = new CustomPropertySubstitutions
{
LtiUser = new LtiUser
{
Username = person.Username
}
};
request.Custom = substitutions.ReplaceCustomPropertyValues(custom);
return(new List <Claim>(request.Claims));
}
