public void ShowPersonalMessage(int id)
{
ICollection <Trainer> trainers = DBTrainer.ReadTrainers();
Trainer me = trainers.Where(t => t.Id == id).First();
ConsoleUI.ShowLine($"Hello {me.FirstName} {me.LastName}");
}
public static bool IsEmptyDB()
{
int UserSize = DBUser.ReadUsers().Count();
int AssignmentSize = DBAssignment.ReadAssignments().Count();
int StudentSize = DBStudent.ReadStudents().Count();
int CourseSize = DBCourse.ReadCourses().Count();
int TrainerSize = DBTrainer.ReadTrainers().Count();
bool basicEntities = UserSize == 0 &&
AssignmentSize == 0 &&
StudentSize == 0 &&
CourseSize == 0 &&
TrainerSize == 0;
return(basicEntities);
}
public void Read()
{
ICollection <Trainer> trainers = DBTrainer.ReadTrainers();
if (trainers.Count() == 0)
{
ConsoleUI.ShowLine("no trainers yet");
}
else
{
foreach (Trainer t in trainers)
{
ConsoleUI.ShowLine(t);
}
}
ConsoleUI.ReadKey();
ConsoleUI.Clear();
}
public void Delete()
{
bool exit;
ICollection <Trainer> trainers = DBTrainer.ReadTrainers();
if (trainers.Count() == 0)
{
ConsoleUI.ShowLine("no trainers yet");
ConsoleUI.ReadKey();
ConsoleUI.Clear();
return;
}
else
{
ConsoleUI.ShowLine("select trainer to delete, type 0 to exit");
foreach (Trainer t in trainers)
{
ConsoleUI.ShowLine(t);
}
}
exit = ConsoleUI.GetInt(out int TrainerID, "give trainer id: ");
if (exit)
{
return;
}
Trainer trainer;
try
{
trainer = trainers.Where(t => t.Id == TrainerID).First();
}
catch (Exception)
{
ConsoleUI.ShowLine($"NO TRAINER FOUND WITH ID: {TrainerID}");
ConsoleUI.ReadKey();
return;
}
bool confirmed = ConsoleUI.GetConfirmation($"are you sure you want to delete trainer {trainer.FirstName} {trainer.LastName}? [y/n]: ");
int result = 0;
if (confirmed)
{
try
{
result = DBTrainer.DeleteTrainer(TrainerID);
if (result == 0)
{
throw new Exception("could NOT delete trainer");
}
}
catch (Exception e)
{
ConsoleUI.ShowLine(e.Message);
ConsoleUI.ReadKey();
return;
}
try
{
result = DBUser.DeleteUser(TrainerID);
if (result == 0)
{
throw new Exception("could NOT delete user");
}
}
catch (Exception e)
{
ConsoleUI.ShowLine(e.Message);
ConsoleUI.ReadKey();
return;
}
ConsoleUI.ShowLine("trainer deleted successfully");
ConsoleUI.ReadKey();
}
}
public void Update()
{
bool exit;
ICollection <Trainer> trainers = DBTrainer.ReadTrainers();
if (trainers.Count() == 0)
{
ConsoleUI.ShowLine("No trainers yet");
ConsoleUI.ReadKey();
ConsoleUI.Clear();
return;
}
else
{
ConsoleUI.ShowLine("select trainer to update, type 0 to exit");
foreach (Trainer t in trainers)
{
ConsoleUI.ShowLine(t);
}
}
exit = ConsoleUI.GetInt(out int TrainerID, "give trainer id: ");
if (exit)
{
return;
}
ConsoleUI.Clear();
Trainer trainer;
try
{
trainer = trainers.Where(t => t.Id == TrainerID).First();
}
catch (Exception)
{
ConsoleUI.ShowLine($"NO TRAINER FOUND WITH ID: {TrainerID}");
ConsoleUI.ReadKey();
return;
}
ConsoleUI.ShowLine($"you selected to edit trainer: {trainer.FirstName} {trainer.LastName}");
ConsoleUI.ShowLine($"select attribute to edit, type 0 anytime to exit");
ConsoleUI.ShowLine("1. Username");
ConsoleUI.ShowLine("2. Password");
ConsoleUI.ShowLine("3. First name");
ConsoleUI.ShowLine("4. Last name");
ConsoleUI.ShowLine("5. Subject");
exit = ConsoleUI.GetInt(out int choice);
if (exit)
{
return;
}
ConsoleUI.Clear();
Object attribute;
if (choice == 1 || choice == 2)
{
attribute = (UserAttributes)choice;
}
else
{
attribute = (TrainerAttributes)choice;
}
string newInput = "";
bool entitySpecificUpdate = false;
switch (attribute)
{
case TrainerAttributes.Fname:
exit = ConsoleUI.GetString(out newInput, "enter new first name: ");
entitySpecificUpdate = true;
break;
case TrainerAttributes.Lname:
exit = ConsoleUI.GetString(out newInput, "enter new last name: ");
entitySpecificUpdate = true;
break;
case TrainerAttributes.Subject:
exit = ConsoleUI.GetString(out newInput, "enter new subject: ");
entitySpecificUpdate = true;
break;
case UserAttributes.Username:
exit = ConsoleUI.GetString(out newInput, "enter new username: "******"enter new password: "******"trainer update failed");
}
ConsoleUI.ShowLine("trainer updated successfully");
}
catch (Exception e)
{
ConsoleUI.ShowLine(e.Message);
ConsoleUI.ReadKey();
return;
}
}
else
{
try
{
result = DBUser.UpdateUser(TrainerID, attribute, newInput);
if (result == 0)
{
throw new Exception("user update failed");
}
ConsoleUI.ShowLine("user updated successfully");
}
catch (Exception e)
{
ConsoleUI.ShowLine(e.Message);
ConsoleUI.ReadKey();
return;
}
}
ConsoleUI.ReadKey();
}