public string GetInfo(string univerName)
{
var univers = GenerateUnivers();
var teacherLogic = new TeacherLogic();
var teachers = teacherLogic.GenerateTeachers();
var studentLogic = new StudentLogic();
var students = studentLogic.GenerateStudents();
var univer = univers
.SingleOrDefault(u => u.Name == univerName);
if (univer == null)
{
throw new Exception(" University with univerName = " +
$"{univerName} was not found. ");
}
int studentsCount = students
.Count(s => s.UniverId == univer.Id);
int teachersCount = teachers
.Count(t => t.UniverId == univer.Id);
return($" The {univer.FullName} ({univer.Name}) " +
$"has {studentsCount} students and " +
$"{teachersCount} teachers. ");
}
public Student GetStudent(int studentId)
{
StudentLogic studentLogic = new StudentLogic();
List <Student> students = studentLogic.GenerateStudents();
var student = students.SingleOrDefault(s => s.Id == studentId);
if (student == null)
{
throw new Exception($" Student with Id = {studentId} not found! ");
}
return(student);
}
public List <string> GetUniverStudents(int univerId)
{
var studentLogic = new StudentLogic();
var studentList = studentLogic.GenerateStudents();
if (studentList.Any(s => s.UniverId == univerId) == false)
{
throw new Exception(" Students studying at the university with " +
$"Id = {univerId} was not found. ");
}
return(studentList
.Where(student => student.UniverId == univerId)
.Select(student => student.Name)
.ToList());
}
public IEnumerable <string> GetAllInfo()
{
var univers = GenerateUnivers();
var teacherLogic = new TeacherLogic();
var teachers = teacherLogic.GenerateTeachers();
var studentLogic = new StudentLogic();
var students = studentLogic.GenerateStudents();
var univerTeachersStudents =
from univer in univers
join teacher in teachers on univer.Id equals teacher.UniverId
join student in students on univer.Id equals student.UniverId
select new UniverStudentTeacher(univer, teacher, student);
var groups = univerTeachersStudents
.GroupBy(x => x.Univer, elem => new { elem.Teacher, elem.Student })
.ToList();
List <string> univerTeachStudList = new List <string>();
foreach (var gr in groups)
{
var teachersGr = gr
.Where(t => t != null && t.Teacher != null)
.Select(t => t.Teacher)
.Distinct()
.ToList();
var teacherStr = GetTeacherDescription(teachersGr);
var studentsGr = gr
.Where(s => s?.Student != null)
.Select(s => s.Student)
.Distinct()
.ToList();
var sNameList = GetStudentDescription(studentsGr);
univerTeachStudList
.Add($" The {gr.Key.FullName} has " +
$" {teacherStr} and " +
$" {sNameList}. ");
}
return(univerTeachStudList);
}
public IEnumerable <string> GetAllUnivers()
{
var univers = GenerateUnivers();
var teacherLogic = new TeacherLogic();
var teachers = teacherLogic.GenerateTeachers();
var studentLogic = new StudentLogic();
var students = studentLogic.GenerateStudents();
List <string> univTeachSudList = new List <string>();
foreach (var univer in univers)
{
int teachersCount = teachers.Count(t => t.UniverId == univer.Id);
int studentsCount = students.Count(s => s.UniverId == univer.Id);
univTeachSudList.Add($" The {univer.FullName} " +
$"({univer.Name}) has " +
$"{teachersCount} teachers and " +
$"{studentsCount} students. ");
}
return(univTeachSudList);
}
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());
}
