public IEnumerable <string> GetAllTeachers()
{
var teachers = GenerateTeachers();
var univerLogic = new UniverLogic();
var univers = univerLogic.GenerateUnivers();
var univerTeachers =
from teacher in teachers
join univer in univers
on teacher.UniverId equals univer.Id
select new UniverTeacher(teacher, univer);
List <string> teachersList = new List <string>();
foreach (var ut in univerTeachers)
{
teachersList.Add
(
$" {ut.Teacher.GendersDisplayNames[ut.Teacher.Gender]} " +
$"{ut.Teacher.Name} " +
$"{ut.Teacher.Patronymic} teaches " +
$"{ut.Teacher.Lesson} at " +
$"{ut.Univer.Name}. "
);
}
return(teachersList);
}
public string GetName(Student student)
{
var univerLogic = new UniverLogic();
var univers = univerLogic.GenerateUnivers();
var univer = univers
.SingleOrDefault(u => u.Id == student.UniverId);
if (univer == null)
{
throw new Exception($" Univer with Id = {student.UniverId} " +
$"in which student {student.Name} " +
$"(with Id = {student.Id}) is studying " +
"is not found in DataBase 'Univers'! ");
}
return($" A student {student.Name} aged {student.Age} years " +
$"studying at {univer.Name}. ");
}
internal List <string> GetAllStudents()
{
var studentLogic = new StudentLogic();
var students = studentLogic.GenerateStudents();
var univerLogic = new UniverLogic();
var univers = univerLogic.GenerateUnivers();
var univerStudent =
from student in students
join univer in univers
on student.UniverId equals univer.Id
select new UniverStudent(student, univer);
List <string> studentsList = new List <string>();
foreach (var uStudent in univerStudent)
{
studentsList.Add
(
$" A student {uStudent.Student.Name} aged {uStudent.Student.Age} " +
$"years studying at {uStudent.Univer.Name}. "
);
}
return(studentsList);
}
public List <string> GetUniverStudents(string univerName)
{
UniverLogic univerLogic = new UniverLogic();
List <Univer> univerList = univerLogic.GenerateUnivers();
var univerListSortedName = univerList
.Where(univer => univer.Name == univerName)
.ToList();
if (!univerListSortedName.Any())
{
throw new Exception($" University with name {univerName} " +
"was not found in the database 'Univer'. ");
}
var studentLogic = new StudentLogic();
var studentList = studentLogic.GenerateStudents();
var univerStudents = from student in studentList
join univer in univerListSortedName
on student.UniverId equals univer.Id
select new UniverStudent(student, univer);
return(univerStudents
.Select(su => $" {su.Student.Name} studies at {su.Univer.Name} ")
.ToList());
}
public string GetOneTeacher(int teacherId)
{
var teachers = GenerateTeachers();
var univerLogic = new UniverLogic();
var univers = univerLogic.GenerateUnivers();
var univerTeachers =
from teacher in teachers
join univer in univers
on teacher.UniverId equals univer.Id
select new UniverTeacher(teacher, univer);
var ut =
univerTeachers.SingleOrDefault(uT => uT.Teacher.Id == teacherId);
if (ut == null)
{
throw new Exception($" Teacher with Id = {teacherId} not found. ");
}
return($" {ut.Teacher.GendersDisplayNames[ut.Teacher.Gender]} " +
$"{ut.Teacher.Name} " +
$"{ut.Teacher.Patronymic} teaches " +
$"{ut.Teacher.Lesson} at " +
$"{ut.Univer.Name}. ");
}
