/// <summary>
/// Validate a JWT
/// </summary>
/// <param name="formVariables"></param>
/// <param name="secret"></param>
/// <returns></returns>
private LTI11Request ValidateJwt(NameValueCollection formVariables, string secret)
{
Exception exception = null;
LTI11Request LTIReq = this;
LTIReq.valid = false;
try
{
buildLtiRequest(formVariables, LTIReq);
}
catch (Exception e)
{
exception = e;
}
return(LTIReq);
}
/// <summary>
/// Build a validated LTI request
/// </summary>
/// <param name="formVariables"></param>
/// <param name="LTIReq"></param>
private static void buildLtiRequest(NameValueCollection formVariables, LTI11Request LTIReq)
{
//TODO: validate timestamp: LTIReq.oauth_timestamp
LTIReq.custom_canvas_css_common = formVariables[LTIRequestKeys.CustomCanvasCss] ?? "";
LTIReq.user_id = formVariables[LTIRequestKeys.UserId] ?? "";
LTIReq.roles = formVariables[LTIRequestKeys.Roles] ?? "";
LTIReq.context_id = formVariables[LTIRequestKeys.ContextId] ?? "";
LTIReq.context_title = formVariables[LTIRequestKeys.ContextTitle] ?? "";
LTIReq.custom_canvas_api_domain = formVariables[LTIRequestKeys.CustomCanvasApiDomain] ?? "";
LTIReq.custom_canvas_user_id = formVariables[LTIRequestKeys.CustomCanvasUserId] ?? "";
LTIReq.custom_canvas_user_login_id = formVariables[LTIRequestKeys.CustomCanvasUserLoginId] ?? "";
LTIReq.custom_canvas_sis_course_id = formVariables[LTIRequestKeys.CustomCanvasSisCourseId] ?? "";
LTIReq.custom_psu_external_tool_id = formVariables[LTIRequestKeys.CustomPsuExternalToolId] ?? "";
LTIReq.ext_roles = formVariables[LTIRequestKeys.ExtRoles] ?? "";
LTIReq.launch_presentation_return_url = formVariables[LTIRequestKeys.LaunchPresentationReturnUrl] ?? "";
var contextLabel = (formVariables[LTIRequestKeys.ContextLabel] ?? "").Trim();
if (contextLabel.Length > 0)
{
LTIReq.context_label = contextLabel;
}
//srg25 7/6/2015 - Adding a check to see if there is a course id or not
var customCanvasCourseId = (formVariables[LTIRequestKeys.CustomCanvasCourseId] ?? "").Trim();
if (customCanvasCourseId.Length > 0)
{
LTIReq.custom_canvas_course_id = customCanvasCourseId;
}
//srg25 7/6/2015 - Adding a check to see if there is an enrollment state.
var customCanvasEncollmentState = (formVariables[LTIRequestKeys.CustomCanvasEnrollmentState] ?? "").Trim();
if (customCanvasEncollmentState.Length > 0)
{
LTIReq.custom_canvas_enrollment_state = customCanvasEncollmentState;
}
// populate role flags
LTIReq.isAdmin = HasAdminRole(formVariables);
LTIReq.isInstructor = (formVariables[LTIRequestKeys.ExtRoles] ?? "").Contains(LTIRequestKeys.ExtRoleInstructor);
LTIReq.isStudent = LTIReq.roles.Contains(LTIRequestKeys.RoleStudent);
LTIReq.isCourseInstructor = LTIReq.roles.Contains(LTIRequestKeys.RoleInstructor);
//sxn82-2016/11/29 - null check for user id.
//if ((formVariables[LTIRequestKeys.ExtRoles] ?? "").Contains(LTIRequestKeys.ExtRoleAdministrator) && !string.IsNullOrWhiteSpace(LTIReq.custom_canvas_user_id))
//{
// //srg25-2016/4/11 - need to check to see if this person is in an allowable admin position
// var admRoles = CanvasAdminApiBL.ListAccountAdmins(Settings.PsuAccountId, new[] { Convert.ToInt64(LTIReq.custom_canvas_user_id) });
// // srg25-2016/4/11 - Get the allowable admin roles to use tool from env var value
// var helpdeskAdminRoles = PsuDbDal.GetEnvVar("HelpdeskAdminRoles", "1").Split(',').ToList();
// LTIReq.isHelpDeskAdmin = admRoles.Any(r => helpdeskAdminRoles.Contains(r.Role));
// // Start Revision: 2017/4/10 srg25 -- Needed another property for dev team admins
// var devTeamAdminRoles = PsuDbDal.GetEnvVar("DevTeamAdminRoles", "1").Split(',').ToList();
// LTIReq.isDevTeamAdmin = admRoles.Any(r => devTeamAdminRoles.Contains(r.Role));
//}
//else
//{
// LTIReq.isHelpDeskAdmin = false;
// LTIReq.isDevTeamAdmin = false;
// // End Revision: 2017/4/10 srg25
//}
//// Get all 'Pride Admins' for this course
//LTIReq.isGroupAdmin = false;
//long courseid;
//long.TryParse(LTIReq.custom_canvas_course_id, out courseid);
//List<CanvasEnrollmentApiStruct> TAEnrollments = CanvasEnrollmentApiBL.GetCourseEnrollments(courseid, type: new string[] { "TaEnrollment" });
//var groupAdmins = TAEnrollments.Where(r => r.Role.Equals("Pride Admin")).ToList();
//foreach (var thisEnrollment in groupAdmins)
//{
// if (thisEnrollment.User.Id.ToString() == LTIReq.custom_canvas_user_id)
// {
// LTIReq.isGroupAdmin = true;
// }
//}
//LTIReq.isCourseAdmin = false;
//List<CanvasEnrollmentApiStruct> TeacherEnrollments = CanvasEnrollmentApiBL.GetCourseEnrollments(courseid, type: new string[] { "TeacherEnrollment" });
//var courseAdmins = TeacherEnrollments.Where(r => r.Role.Equals("Course Admin")).ToList();
//foreach (var thisEnrollment in courseAdmins)
//{
// if (thisEnrollment.User.Id.ToString() == LTIReq.custom_canvas_user_id)
// {
// LTIReq.isCourseAdmin = true;
// }
//}
LTIReq.valid = true;
}