private void ReadData(string fileName)
{
string path = SessionData.currentPath + "\\" + fileName;
if (File.Exists(path))
{
OutputWriter.WriteMessageOnNewLine("Reading data...");
string pattern = @"([A-Z][a-zA-Z#\++]*_[A-Z][a-z]{2}_\d{4})\s+([A-Za-z]+\d{2}_\d{2,4})\s([\s0-9]+)";
Regex rgx = new Regex(pattern);
string[] allInputLines = File.ReadAllLines(path);
for (int line = 0; line < allInputLines.Length; line++)
{
if (!string.IsNullOrEmpty(allInputLines[line]) && rgx.IsMatch(allInputLines[line]))
{
Match currentMatch = rgx.Match(allInputLines[line]);
string courseName = currentMatch.Groups[1].Value;
string username = currentMatch.Groups[2].Value;
string scoresStr = currentMatch.Groups[3].Value;
try
{
int[] scores = scoresStr.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries)
.Select(int.Parse)
.ToArray();
if (scores.Any(x => x > 100 || x < 0))
{
OutputWriter.DisplayException(ExceptionMessages.InvalidScore);
continue;
}
if (scores.Length > SoftUniCourse.NumberOfTasksOnExam)
{
OutputWriter.DisplayException(ExceptionMessages.InvalidNumberOfScores);
continue;
}
if (!this.Students.ContainsKey(username))
{
this.students.Add(username, new SoftUniStudent(username));
}
if (!this.Courses.ContainsKey(courseName))
{
this.courses.Add(courseName, new SoftUniCourse(courseName));
}
SoftUniCourse course = this.Courses[courseName];
SoftUniStudent student = this.Students[username];
student.EnrollInCourse(course);
student.SetMarkOnCourse(courseName, scores);
course.EnrollStudent(student);
}
catch (Exception ex)
{
OutputWriter.DisplayException(ex.Message + $"at line : {line}");
}
}
}
this.isDataInitialized = true;
OutputWriter.WriteMessageOnNewLine("Data read!");
}
else
{
throw new InvalidPathException();
}
}