//***** Delete TA by Id*****
public static bool Delete_TA(int Id)
{
bool isSuccessful = true;
using (TAhubContext db = new TAhubContext())
{
try
{
TeachersAssistant deleteTA = db.TAs.FirstOrDefault(x => x.Id == Id);
db.Entry(deleteTA).Collection(s => s.Messages).Load(); // loads TA's Messsages
//Removes TA's Messages from database
db.Messages.RemoveRange(deleteTA.Messages);
db.SaveChanges();
//Removes TA's WeeklySchedule from database
db.Schedules.RemoveRange(deleteTA.WeeklySchedule);
db.SaveChanges();
//Removes TA from database
db.Entry(deleteTA).State = System.Data.Entity.EntityState.Deleted;
db.SaveChanges();
}
catch (Exception ex)
{
isSuccessful = false;
}
}
return(isSuccessful);
}
//***** Insert TA *****
public static string Insert(TeachersAssistant TA_DB)
{
string errors = String.Empty;
using (TAhubContext db = new TAhubContext())
{
try
{
//Check for duplicates here
if (db.TAs.FirstOrDefault(x => x.Email == TA_DB.Email) == null)
{
db.TAs.Add(TA_DB);
db.SaveChanges();
}
else
{
errors += "Your email address has already been registered to another account. Do not try to fool us -_-\n";
}
}
catch (Exception ex)
{
errors += "Unable to Process Request.\n";
}
}
return(errors);
}
public static List <TeachersAssistant> Generate_TAs(int Count)
{
List <TeachersAssistant> TAs = new List <TeachersAssistant>();
for (int i = 0; i < Count; i++)
{
TeachersAssistant TA = new TeachersAssistant();
TA.Password = "******";
TA.StudentId = 11507800 + i;
TA.GPA = $"3.{i%10}{(i+7)%10}";
int majorIndex = i % TAhub.Models.EnumValues.Majors.Count;
TA.Major = TAhub.Models.EnumValues.Majors[majorIndex];
TA.HasExperience = true;
TA.Credits = 25 + (i % 50);
bool isMale = i % 2 == 0;
if (isMale)
{
TA.FirstName = FirstNames_Male[i % FirstNames_Male.Count];
TA.Gender = "Male";
}
else
{
TA.FirstName = FirstNames_Female[i % FirstNames_Female.Count];
TA.Gender = "Female";
}
TA.LastName = LastNames[i % LastNames.Count];
TA.Email = $"{TA.FirstName}.{TA.LastName}@wsu.edu";
TA.Messages = Generate_Messages();
TA.Preference1 = "Cpts 121";
TA.Preference2 = "Psych 230";
TA.Preference3 = "Cpts 322";
TAs.Add(TA);
}
return(TAs);
}
//***** TA DB *****
public static TeachersAssistant TA_ModelToDB(Models.TAModel TA_Model)
{
TeachersAssistant TA_DB = new TeachersAssistant();
using (TAhubContext db = new TAhubContext())
{
try
{
TA_DB.StudentId = Int32.Parse(TA_Model.StudentId);
TA_DB.FirstName = TA_Model.FirstName;
TA_DB.LastName = TA_Model.LastName;
TA_DB.Email = TA_Model.Login.Username;
TA_DB.Password = TA_Model.Login.Password;
TA_DB.Credits = Int32.Parse(TA_Model.Credits);
TA_DB.GPA = TA_Model.GPA;
TA_DB.HasExperience = Models.EnumValues.Bools[(int)TA_Model.HasExperience];
TA_DB.Lab = TA_Model.Lab;
TA_DB.Gender = Models.EnumValues.Genders[(int)TA_Model.Gender];
TA_DB.Major = Models.EnumValues.Majors[(int)TA_Model.Major];
TA_DB.WeeklySchedule = TA_Model.WeeklySchedule;
int count = TA_Model.CoursePreferences != null ? TA_Model.CoursePreferences.Count : 0;
for (int i = 0; i < count; i++)
{
switch (i)
{
case 0:
TA_DB.Preference1 = TA_Model.CoursePreferences[i];
break;
case 1:
TA_DB.Preference2 = TA_Model.CoursePreferences[i];
break;
case 2:
TA_DB.Preference3 = TA_Model.CoursePreferences[i];
break;
default: break;
}
}
TA_DB.Course = TA_Model.CourseAssignment;
TA_DB.Messages = TA_Model.Messages;
}
catch (Exception)
{
TA_DB = null;
}
}
return(TA_DB);
}
//***** Update a TAs Course Information *****
public static string TA_UpdateCourse(TeachersAssistant TA_DB, Nullable <int> CourseId)
{
string errors = "";
using (TAhubContext db = new TAhubContext())
{
try
{
TA_DB.Lab = null;
TA_DB.CourseId = CourseId;
db.Entry(TA_DB).State = System.Data.Entity.EntityState.Modified;
db.SaveChanges();
}
catch (Exception ex)
{
errors += "Unable to Process Request.\n";
}
}
return(errors);
}
//*****Update TA Account Info *****
public static TeachersAssistant Update(TeachersAssistant TA_DB)
{
TeachersAssistant TA_Original = null;
using (TAhubContext db = new TAhubContext())
{
try
{
TA_Original = db.TAs.FirstOrDefault(x => x.Id == TA_DB.Id);
db.Entry(TA_Original).Reference(s => s.Course).Load(); // loads Course
db.Entry(TA_Original).Collection(s => s.Messages).Load(); // loads Message collection
db.Entry(TA_Original).Collection(s => s.WeeklySchedule).Load(); // loads Schedule collection
if (TA_Original != null)
{
//First Name
if (!String.IsNullOrWhiteSpace(TA_DB.FirstName) &&
!String.Equals(TA_Original.FirstName, TA_DB.FirstName))
{
TA_Original.FirstName = TA_DB.FirstName;
}
//Last Name
if (!String.IsNullOrWhiteSpace(TA_DB.LastName) &&
!String.Equals(TA_Original.LastName, TA_DB.LastName))
{
TA_Original.LastName = TA_DB.LastName;
}
//Email
if (!String.IsNullOrWhiteSpace(TA_DB.Email) &&
!String.Equals(TA_Original.Email, TA_DB.Email))
{
TA_Original.Email = TA_DB.Email;
}
//Password
if (!String.IsNullOrWhiteSpace(TA_DB.Password) &&
!String.Equals(TA_Original.Password, TA_DB.Password))
{
TA_Original.Password = TA_DB.Password;
}
//Gender
if (!String.IsNullOrWhiteSpace(TA_DB.Gender) &&
!String.Equals(TA_Original.Gender, TA_DB.Gender))
{
TA_Original.Gender = TA_DB.Gender;
}
//Major
if (!String.IsNullOrWhiteSpace(TA_DB.Major) &&
!String.Equals(TA_Original.Major, TA_DB.Major))
{
TA_Original.Major = TA_DB.Major;
}
//Lab
if (TA_Original.Lab != TA_DB.Lab)
{
TA_Original.Lab = TA_DB.Lab;
}
//GPA
if (!String.IsNullOrWhiteSpace(TA_DB.GPA) &&
!String.Equals(TA_Original.GPA, TA_DB.GPA))
{
TA_Original.GPA = TA_DB.GPA;
}
//Credits
if (TA_Original.Credits != TA_DB.Credits &&
TA_DB.Credits >= 0)
{
TA_Original.Credits = TA_DB.Credits;
}
db.Entry(TA_Original).State = System.Data.Entity.EntityState.Modified;
db.SaveChanges();
}
else
{
TA_Original = null;
}
}
catch (Exception ex)
{
TA_Original = null;
}
}
return(TA_Original);
}
