public string Execute(IList <string> parameters, ISchoolSystemData data)
{
var studentId = int.Parse(parameters[0]);
var student = data.Students.GetById(studentId);
return(student.ListMarks());
}
/* Could also extract Database provider for Teachers and Students collections
* But it will become too complex for the purposes of this exam */
public Engine(IReader readerProvider, IWriter writerProvider, IParser parserProvider, ISchoolSystemData schoolSystemData)
{
if (readerProvider == null)
{
throw new ArgumentNullException($"Reader {NullProvidersExceptionMessage}");
}
if (writerProvider == null)
{
throw new ArgumentNullException($"Writer {NullProvidersExceptionMessage}");
}
if (parserProvider == null)
{
throw new ArgumentNullException($"Parser {NullProvidersExceptionMessage}");
}
if (schoolSystemData == null)
{
throw new ArgumentNullException($"Data {NullProvidersExceptionMessage}");
}
this.reader = readerProvider;
this.writer = writerProvider;
this.parser = parserProvider;
this.schoolSystemData = schoolSystemData;
}
public CreateTeacherCommand(ITeacherFactory teacherFactory, ISchoolSystemData schoolSystemData, IMarkFactory markFactory)
{
this.teacherFactory = teacherFactory ?? throw new ArgumentNullException("Teacher Factory cannot be null!");
this.schoolSystemData = schoolSystemData ?? throw new ArgumentNullException("School system data cannot be null!");
this.markFactory = markFactory ?? throw new ArgumentNullException("Mark factory cannot be null!");
this.currentTeacherId = 0;
}
public string Execute(IList <string> parameters, ISchoolSystemData data)
{
var teacherId = int.Parse(parameters[0]);
data.Teachers.Remove(teacherId);
return($"Teacher with ID {teacherId} was sucessfully removed.");
}
public string Execute(IList <string> parameters, ISchoolSystemData data)
{
var studentId = int.Parse(parameters[0]);
data.Students.Remove(studentId);
return($"Student with ID {studentId} was sucessfully removed.");
}
public string Execute(IList <string> parameters, ISchoolSystemData data)
{
var firstName = parameters[0];
var lastName = parameters[1];
var grade = (Grade)int.Parse(parameters[2]);
var student = this.studentFactory.CreateStudent(firstName, lastName, grade);
var studentId = data.Students.Add(student);
return($"A new student with name {firstName} {lastName}, grade {grade} and ID {studentId} was created.");
}
public string Execute(IList <string> parameters, ISchoolSystemData data)
{
var firstName = parameters[0];
var lastName = parameters[1];
var subject = (Subject)int.Parse(parameters[2]);
var teacher = this.teacherFactory.CreateTeacher(firstName, lastName, subject);
var teacherId = data.Teachers.Add(teacher);
return
($"A new teacher with name {firstName} {lastName}, subject {subject} and ID {teacherId} was created.");
}
public string Execute(IList <string> parameters, ISchoolSystemData schoolSystemData)
{
var studentId = int.Parse(parameters[0]);
if (!this.studentData.Students.ContainsKey(studentId))
{
throw new ArgumentException("The given key was not present in the dictionary.");
}
this.studentData.Students.Remove(studentId);
return($"Student with ID {studentId} was sucessfully removed.");
}
public string Execute(IList <string> parameters, ISchoolSystemData schoolSystemData)
{
var teacherId = int.Parse(parameters[0]);
var studentId = int.Parse(parameters[1]);
var mark = float.Parse(parameters[2]);
var student = this.studentData.Students.GetById(studentId);
var teacher = this.teachersData.Teachers.GetById(teacherId);
teacher.AddMark(student, mark);
return($"Teacher {teacher.FirstName} {teacher.LastName} added mark {mark} to student {student.FirstName} {student.LastName} in {teacher.Subject}.");
}
public StudentListMarksCommand(ISchoolSystemData schoolSystemData)
{
this.schoolSystemData = schoolSystemData ?? throw new ArgumentNullException("School system data cannot be null!");
}
public TeacherAddMarkCommand(ISchoolSystemData schoolSystemData)
{
this.schoolSystemData = schoolSystemData ?? throw new ArgumentNullException("School system data cannot be null!");
}
public CreateStudentCommand(IStudentFactory studentFactory, ISchoolSystemData schoolSystemData)
{
this.schoolSystemData = schoolSystemData ?? throw new ArgumentNullException("School system data cannot be null!");
this.studentFactory = studentFactory ?? throw new ArgumentNullException("Student factory cannot be null!");
this.currentStudentId = 0;
}
