/*******Begin code to modify********/
/// <summary>
/// Create a new user of the LMS with the specified information.
/// Assigns the user a unique uID consisting of a 'u' followed by 7 digits.
/// </summary>
/// <param name="fName">First Name</param>
/// <param name="lName">Last Name</param>
/// <param name="DOB">Date of Birth</param>
/// <param name="SubjectAbbrev">The department the user belongs to (professors and students only)</param>
/// <param name="SubjectAbbrev">The user's role: one of "Administrator", "Professor", "Student"</param>
/// <returns>A unique uID that is not be used by anyone else</returns>
public string CreateNewUser(string fName, string lName, DateTime DOB, string SubjectAbbrev, string role)
{
string uID = "";
using (Team9LMSContext db = new Team9LMSContext())
{
Users newUser = new Users
{
FirstName = fName,
LastName = lName,
Dob = DOB
};
db.Users.Add(newUser);
db.SaveChanges();
var query = from u in db.Users
where u.FirstName == fName && u.LastName == lName
select new { uID = u.UId };
foreach (var q in query)
{
string[] sList = Convert.ToString(q.uID).Split(" ");
uID = sList[0];
}
if (role == "Administrator")
{
Administrators newAd = new Administrators
{
UId = uID
};
db.Administrators.Add(newAd);
db.SaveChanges();
}
if (role == "Professor")
{
Professors newPro = new Professors
{
UId = uID,
Subject = SubjectAbbrev
};
db.Professors.Add(newPro);
db.SaveChanges();
}
if (role == "Student")
{
Students newStu = new Students
{
UId = uID,
Subject = SubjectAbbrev
};
db.Students.Add(newStu);
db.SaveChanges();
}
}
return(uID);
}
/// <summary>
/// Adds a submission to the given assignment for the given student
/// The submission should use the current time as its DateTime
/// You can get the current time with DateTime.Now
/// The score of the submission should start as 0 until a Professor grades it
/// If a Student submits to an assignment again, it should replace the submission contents
/// and the submission time (the score should remain the same).
/// </summary>
/// <param name="subject">The course subject abbreviation</param>
/// <param name="num">The course number</param>
/// <param name="season">The season part of the semester for the class the assignment belongs to</param>
/// <param name="year">The year part of the semester for the class the assignment belongs to</param>
/// <param name="category">The name of the assignment category in the class</param>
/// <param name="asgname">The new assignment name</param>
/// <param name="uid">The student submitting the assignment</param>
/// <param name="contents">The text contents of the student's submission</param>
/// <returns>A JSON object containing {success = true/false}</returns>
public IActionResult SubmitAssignmentText(string subject, int num, string season, int year,
string category, string asgname, string uid, string contents)
{
//sub, num --> catalogID
// catalogID, year, season --> ClassID
// classID, category --> acID
// acID, asgname -- > aID
// aID, uID, Constents --> add to submission
using (Team9LMSContext db = new Team9LMSContext())
{
var aIDQuery = from acID in (from ci in (from cid in (from c in db.Courses
where c.Subject == subject && c.Num == num
select new { CatalogId = c.CatalogId })
join cl in db.Classes
on cid.CatalogId equals cl.CatalogId
where cl.Semester == year.ToString() + season
select new { classID = cl.ClassId })
join ac in db.AssignmentCategories
on ci.classID equals ac.ClassId
where ac.Name == category
select new { acID = ac.AcId })
join asg in db.Assignments
on acID.acID equals asg.AcId
where asg.Name == asgname
select new { asg.AId, asg.Points };
uint aID = aIDQuery.First().AId;
var subQuery = from s in db.Submission
where s.AId == aID && s.UId == uid
select s;
if (subQuery.Count() > 0)
{
subQuery.First().Time = DateTime.Now;
subQuery.First().Contents = contents;
try
{
db.Update(subQuery.First());
db.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine(e);
}
}
else
{
Submission newSub = new Submission();
newSub.AId = aID;
newSub.UId = uid;
newSub.Time = DateTime.Now;
newSub.Contents = contents;
//newSub.Score = 0;
db.Submission.Add(newSub);
db.SaveChanges();
}
}
return(Json(new { success = true }));
}
/// <summary>
/// Enrolls a student in a class.
/// </summary>
/// <param name="subject">The department subject abbreviation</param>
/// <param name="num">The course number</param>
/// <param name="season">The season part of the semester</param>
/// <param name="year">The year part of the semester</param>
/// <param name="uid">The uid of the student</param>
/// <returns>A JSON object containing {success = {true/false}.
/// false if the student is already enrolled in the class, true otherwise.</returns>
public IActionResult Enroll(string subject, int num, string season, int year, string uid) //works
{
//sub , num --> catalogID
// catalogID, season, year --> classid
// classid, uied -- add to Enroll
var flag = false;
using (Team9LMSContext db = new Team9LMSContext())
{
var classIDQuery = from cid in (from c in db.Courses
where c.Subject == subject && c.Num == num
select new { CatalogId = c.CatalogId })
join cl in db.Classes
on cid.CatalogId equals cl.CatalogId
where cl.Semester == year.ToString() + season
select new { classID = cl.ClassId };
Enrolled newEn = new Enrolled();
newEn.UId = uid;
newEn.ClassId = (uint)Convert.ToInt32(classIDQuery.First().classID);
db.Enrolled.Add(newEn);
db.SaveChanges();
flag = true;
}
return(Json(new { success = flag }));
}
/// <summary>
/// Creates a course.
/// A course is uniquely identified by its number + the subject to which it belongs
/// </summary>
/// <param name="subject">The subject abbreviation for the department in which the course will be added</param>
/// <param name="number">The course number</param>
/// <param name="name">The course name</param>
/// <returns>A JSON object containing {success = true/false}.
/// false if the course already exists, true otherwise.</returns>
public IActionResult CreateCourse(string subject, int number, string name) //works
{
if (number > 9999 || number < 0)
{
return(Json(new { success = false }));
}
if (name.Length > 100)
{
return(Json(new { success = false }));
}
using (Team9LMSContext db = new Team9LMSContext())
{
//check to void duplicate (sub, num)
var query = from c in db.Courses
where c.Subject == subject && c.Num == (uint)number
select c;
if (query.Count() > 0)
{
return(Json(new { success = false }));
}
//add new entry to db
Courses newCourse = new Courses
{
Name = name,
Num = (uint)number,
Subject = subject
};
db.Courses.Add(newCourse);
db.SaveChanges();
}
return(Json(new { success = true }));
}
/// <summary>
/// Creates a new assignment for the given class and category.
/// </summary>
/// <param name="subject">The course subject abbreviation</param>
/// <param name="num">The course number</param>
/// <param name="season">The season part of the semester for the class the assignment belongs to</param>
/// <param name="year">The year part of the semester for the class the assignment belongs to</param>
/// <param name="category">The name of the assignment category in the class</param>
/// <param name="asgname">The new assignment name</param>
/// <param name="asgpoints">The max point value for the new assignment</param>
/// <param name="asgdue">The due DateTime for the new assignment</param>
/// <param name="asgcontents">The contents of the new assignment</param>
/// <returns>A JSON object containing success = true/false</returns>
public IActionResult CreateAssignment(string subject, int num, string season, int year, string category, string asgname, int asgpoints, DateTime asgdue, string asgcontents) // works
{
//subject, num -- catalogId
//catalogID, semester -- > classID
//class ID , Name - ACID
// asgname, asgcontenst, asgpoint, asgdue, acid --- add new assignment
using (Team9LMSContext db = new Team9LMSContext())
{
var acIDQuery = from ci in (from cid in (from c in db.Courses
where c.Subject == subject && c.Num == num
select new { CatalogId = c.CatalogId })
join cl in db.Classes
on cid.CatalogId equals cl.CatalogId
where cl.Semester == year.ToString() + season
select new { classID = cl.ClassId })
join ac in db.AssignmentCategories
on ci.classID equals ac.ClassId
where ac.Name == category
select new { acID = ac.AcId, ci.classID };
uint acID = (uint)Convert.ToInt32(acIDQuery.First().acID);
//check to void duiplicate (name , acID )
var duplicateCheckQuery = from asg in db.Assignments
where asg.Name == asgname && asg.AcId == acID
select asg;
if (duplicateCheckQuery.Count() > 0)
{
return(Json(new { success = false }));
}
if (asgpoints < 0)
{
return(Json(new { success = false }));
}
//add new entry to db
Assignments newAS = new Assignments();
newAS.AcId = acID;
newAS.Name = asgname;
newAS.Contents = asgcontents;
newAS.Points = (uint)asgpoints;
newAS.Due = asgdue;
db.Assignments.Add(newAS);
try
{
db.SaveChanges();
}
catch (Exception e)
{
return(Json(new { success = false }));
}
//updata all students's grades.
uint classID = (uint)Convert.ToInt32(acIDQuery.First().classID);
GPA.ClassGradeUpdate(classID);
}
return(Json(new { success = true }));
}
/// <summary>
/// Set the score of an assignment submission
/// </summary>
/// <param name="subject">The course subject abbreviation</param>
/// <param name="num">The course number</param>
/// <param name="season">The season part of the semester for the class the assignment belongs to</param>
/// <param name="year">The year part of the semester for the class the assignment belongs to</param>
/// <param name="category">The name of the assignment category in the class</param>
/// <param name="asgname">The name of the assignment</param>
/// <param name="uid">The uid of the student who's submission is being graded</param>
/// <param name="score">The new score for the submission</param>
/// <returns>A JSON object containing success = true/false</returns>
public IActionResult GradeSubmission(string subject, int num, string season, int year, string category, string asgname, string uid, int score)
//works
{
uint classID = 0;
using (Team9LMSContext db = new Team9LMSContext())
{
var subQuery = from aid in (from acID in (from ci in (from cid in (from c in db.Courses
where c.Subject == subject && c.Num == num
select new { CatalogId = c.CatalogId })
join cl in db.Classes
on cid.CatalogId equals cl.CatalogId
where cl.Semester == year.ToString() + season
select new { classID = cl.ClassId })
join ac in db.AssignmentCategories
on ci.classID equals ac.ClassId
where ac.Name == category
select new { acID = ac.AcId })
join asg in db.Assignments
on acID.acID equals asg.AcId
where asg.Name == asgname
select new { asg.AId, asg.Points })
join s in db.Submission
on aid.AId equals s.AId
where s.UId == uid
select new { s, aid.Points };
uint points = (uint)subQuery.First().Points;
if (score < 0 || score > points)
{
return(Json(new { success = false }));
}
subQuery.First().s.Score = (uint)score;
db.Update(subQuery.First().s);
db.SaveChanges();
//update student's letter grade.
var classIDQuery = from cid in (from c in db.Courses
where c.Subject == subject && c.Num == num
select new { CatalogId = c.CatalogId })
join cl in db.Classes
on cid.CatalogId equals cl.CatalogId
where cl.Semester == year.ToString() + season
select new { classID = cl.ClassId };
classID = (uint)Convert.ToInt32(classIDQuery.First().classID);
GPA.GradeUpdate(uid, classID);
}
return(Json(new { success = true }));
}
/// <summary>
/// Creates a class offering of a given course.
/// </summary>
/// <param name="subject">The department subject abbreviation</param>
/// <param name="number">The course number</param>
/// <param name="season">The season part of the semester</param>
/// <param name="year">The year part of the semester</param>
/// <param name="start">The start time</param>
/// <param name="end">The end time</param>
/// <param name="location">The location</param>
/// <param name="instructor">The uid of the professor</param>
/// <returns>A JSON object containing {success = true/false}.
/// false if another class occupies the same location during any time
/// within the start-end range in the same semester, or if there is already
/// a Class offering of the same Course in the same Semester,
/// true otherwise.</returns>
public IActionResult CreateClass(string subject, int number, string season, int year, DateTime start, DateTime end, string location, string instructor) //works
{
using (Team9LMSContext db = new Team9LMSContext())
{
var catalogIDQuery = from c in db.Courses
where c.Subject == subject && c.Num == number
select new { c.CatalogId };
uint catalogID = 0;
foreach (var cq in catalogIDQuery)
{
catalogID = cq.CatalogId;
}
// To void Location and time overlay or duplicate class in same semester
TimeSpan nStart = DT2TimeSpan(start);
TimeSpan nEnd = DT2TimeSpan(end);
var locationTimeQuery = from c in db.Classes
where (c.CatalogId == catalogID && c.Semester == year.ToString() + season) || ((c.Location == location && ((c.StartTime <= nStart && c.EndTime >= nEnd) || (c.StartTime >= nStart && c.StartTime <= nEnd) || (c.EndTime >= nStart && c.EndTime <= nEnd))) && (c.Semester == year.ToString() + season))
select c;
if (locationTimeQuery.Count() > 0)
{
return(Json(new { success = false }));
}
Classes newClass = new Classes
{
Semester = Convert.ToString(year) + season,
CatalogId = catalogID,
Location = location,
StartTime = DT2TimeSpan(start),
EndTime = DT2TimeSpan(end),
UId = instructor
};
db.Classes.Add(newClass);
try
{
db.SaveChanges();
}
catch (Exception)
{
return(Json(new { success = false }));
}
}
return(Json(new { success = true }));
}
/// <summary>
/// Creates a new assignment category for the specified class.
/// If a category of the given class with the given name already exists, return success = false.
/// </summary>
/// <param name="subject">The course subject abbreviation</param>
/// <param name="num">The course number</param>
/// <param name="season">The season part of the semester for the class the assignment belongs to</param>
/// <param name="year">The year part of the semester for the class the assignment belongs to</param>
/// <param name="category">The new category name</param>
/// <param name="catweight">The new category weight</param>
/// <returns>A JSON object containing {success = true/false} </returns>
public IActionResult CreateAssignmentCategory(string subject, int num, string season, int year, string category, int catweight) //works
{
if (catweight.GetType() != typeof(int) || catweight < 0)
{
return(Json(new { success = false }));
}
using (Team9LMSContext db = new Team9LMSContext())
{
var classIDQuery = from cid in (from c in db.Courses
where c.Subject == subject && c.Num == num
select new { CatalogId = c.CatalogId })
join cl in db.Classes
on cid.CatalogId equals cl.CatalogId
where cl.Semester == year.ToString() + season
select new { classID = cl.ClassId };
if (classIDQuery.Count() == 0)
{
return(Json(new { success = false }));
}
foreach (var cq in classIDQuery)
{
var ClassID = Convert.ToInt32(cq.classID);
AssignmentCategories newAC = new AssignmentCategories();
newAC.ClassId = (uint)ClassID;
newAC.Name = category;
newAC.Weight = (uint)catweight;
db.AssignmentCategories.Add(newAC);
}
try
{
db.SaveChanges();
}
catch (Exception e)
{
System.Diagnostics.Debug.WriteLine("CreateAssignmentCategoryCreateAssignmentCategory");
}
}
return(Json(new { success = true }));
}
public static void GradeUpdate(string uid, uint classID)
{
Dictionary <uint, uint> acIDAndWeight = new Dictionary <uint, uint>();
Dictionary <uint, uint> acIDAndTotalPoints = new Dictionary <uint, uint>();
Dictionary <uint, uint> acIDAndTotalScores = new Dictionary <uint, uint>();
Dictionary <uint, uint> acIDAndTotalAsgs = new Dictionary <uint, uint>();
List <uint> acIDs = new List <uint>();
uint totalWeight = 0;
using (Team9LMSContext db = new Team9LMSContext())
{
//Get all categories of this class
var awQuery = from ac in db.AssignmentCategories
where ac.ClassId == classID
select new { ac.AcId, ac.Weight };
foreach (var aw in awQuery)
{
acIDAndWeight.Add(aw.AcId, (uint)aw.Weight);
acIDAndTotalPoints.Add(aw.AcId, 0);
acIDAndTotalScores.Add(aw.AcId, 0);
acIDs.Add(aw.AcId);
}
//Get all score of each assignment in each assignment category
var asgsQuery = from asg1 in (from acID in (from ac in db.AssignmentCategories
where ac.ClassId == classID
select new { ac.AcId })
join asg in db.Assignments
on acID.AcId equals asg.AcId
select new { asg.AId, asg.Points, asg.AcId })
join s in db.Submission
on asg1.AId equals s.AId
where s.UId == uid
select new { s, points = asg1.Points, acID = asg1.AcId };
foreach (var a1 in asgsQuery)
{
uint acID = (uint)a1.acID;
uint score = (uint?)a1.s.Score ?? 0;
acIDAndTotalScores[acID] += score;
}
//Get all point of each assignment
var pointsQuery = from acID in (from ac in db.AssignmentCategories
where ac.ClassId == classID
select new { ac.AcId })
join asg in db.Assignments
on acID.AcId equals asg.AcId
select new { asg.AId, points = asg.Points, acID = asg.AcId };
foreach (var pq in pointsQuery)
{
uint acID = (uint)pq.acID;
uint points = (uint)pq.points;
acIDAndTotalPoints[acID] += points;
}
//Get number of assignments for each assignment category
var asgNumQuery = from ac in db.AssignmentCategories
where ac.ClassId == classID
select new { acID = ac.AcId, numAsg = numAssignments(ac.AcId) };
foreach (var aNQ in asgNumQuery)
{
acIDAndTotalAsgs.Add(aNQ.acID, aNQ.numAsg);
}
//calculation of total weight and scalefactor
for (int i = 0; i < acIDs.Count(); i++)
{
var tempAcID = acIDs[i];
if (acIDAndTotalAsgs[tempAcID] != 0)
{
totalWeight += acIDAndWeight[tempAcID];
}
}
double scaleFactor = 100.00 / totalWeight;
//Calculation for final score for this class
double finalScore = 0.0;
for (int i = 0; i < acIDs.Count(); i++)
{
var tempAcID = acIDs[i];
if (acIDAndTotalPoints[tempAcID] != 0) // denominator should not be zero --- mean no assigments in this category or this assignment will not be counted.
{
double tempScore = (double)acIDAndTotalScores[tempAcID] / acIDAndTotalPoints[tempAcID] * acIDAndWeight[tempAcID] * scaleFactor;
finalScore += tempScore;
}
}
//convert score to letter grade
List <int> percentage = new List <int> {
93, 90, 87, 83, 80, 77, 73, 70, 67, 63, 60, 0
};
List <string> letters = new List <string> {
"A", "A-", "B+", "B", "B-", "C+", "C", "C-", "D+", "D", "D-", "E"
};
int index = indexOfLetters(percentage, finalScore);
string letterGrade = letters[index];
//update letter grade to DB
var gradeQuery = from e in db.Enrolled
where e.ClassId == classID && e.UId == uid
select e;
gradeQuery.First().Grade = letterGrade;
db.Update(gradeQuery.First());
db.SaveChanges();
}
}