private static void TryParseParametersForOrderAndTake(string takeCommand, string takeQuantity, string courseName, string order)
{
if (takeCommand == "take")
{
if (takeQuantity == "all")
{
StudentsRepository.OrderAndTake(courseName, order);
}
else
{
int studentsToTake;
bool isParsed = int.TryParse(takeQuantity, out studentsToTake);
if (isParsed)
{
StudentsRepository.OrderAndTake(courseName, order, studentsToTake);
}
else
{
OutputWriter.DisplayMessage(ExceptionMessages.InvalidTakeQuantityParameter);
}
}
}
else
{
OutputWriter.DisplayMessage(ExceptionMessages.InvalidTakeCommand);
}
}
private static bool IsQueryForStudentPossible(string courseName, string studentUserName)
{
if (IsQueryForCoursePossible(courseName) && studentsByCourse[courseName].ContainsKey(studentUserName))
{
return(true);
}
else
{
OutputWriter.DisplayMessage(ExceptionMessages.InexistingStudentInDataBase);
}
return(false);
}
public static void CreateDirectoryInCurrentFolder(string name)
{
string path = SessionData.currentPath + "\\" + name;
try
{
Directory.CreateDirectory(path);
}
catch (ArgumentException)
{
OutputWriter.DisplayMessage(ExceptionMessages.ForbiddenSymbolsContainedInName);
}
}
private static void ReadData(string fileName)
{
string path = SessionData.currentPath + "\\" + fileName;
if (File.Exists(path))
{
string pattern = @"([A-Z][a-zA-Z#+]*_[A-Z][a-z]{2}_\d{4})\s+([A-Z][a-z]{0,3}\d{2}_\d{2,4})\s+(\d+)";
Regex regex = new Regex(pattern);
string[] allInputLines = File.ReadAllLines(path);
for (int line = 0; line < allInputLines.Length; line++)
{
if (!string.IsNullOrEmpty(allInputLines[line]) && regex.IsMatch(allInputLines[line]))
{
Match currentMatch = regex.Match(allInputLines[line]);
string course = currentMatch.Groups[1].Value;
string student = currentMatch.Groups[2].Value;
int studentScoreOnTask;
bool hasParsedScore = int.TryParse(currentMatch.Groups[3].Value, out studentScoreOnTask);
if (hasParsedScore && studentScoreOnTask >= 0 && studentScoreOnTask <= 100)
{
if (!studentsByCourse.ContainsKey(course))
{
studentsByCourse.Add(course, new Dictionary <string, List <int> >());
}
if (!studentsByCourse[course].ContainsKey(student))
{
studentsByCourse[course].Add(student, new List <int>());
}
studentsByCourse[course][student].Add(studentScoreOnTask);
}
}
}
isDataInitialized = true;
OutputWriter.WriteMessageOnNewLine("Data read!");
}
else
{
OutputWriter.DisplayMessage(ExceptionMessages.InvalidPath);
}
}
public static void FilterAndTake(Dictionary <string, List <int> > wantedData, string wantedFilter, int studentsToTake)
{
if (wantedFilter == "excellent")
{
FilterAndTake(wantedData, x => x >= 5, studentsToTake);
}
else if (wantedFilter == "average")
{
FilterAndTake(wantedData, x => x < 5 && x >= 3.5, studentsToTake);
}
else if (wantedFilter == "poor")
{
FilterAndTake(wantedData, x => x < 3.5, studentsToTake);
}
else
{
OutputWriter.DisplayMessage(ExceptionMessages.InvalidStudentFilter);
}
}
public static void OrderAndTake(Dictionary <string, List <int> > wantedData, string comparison, int studentsToTake)
{
comparison = comparison.ToLower();
if (comparison == "ascending")
{
PrintStudents(wantedData.OrderBy(x => x.Value.Sum())
.Take(studentsToTake)
.ToDictionary(pair => pair.Key, pair => pair.Value));
}
else if (comparison == "descending")
{
PrintStudents(wantedData.OrderByDescending(x => x.Value.Sum())
.Take(studentsToTake)
.ToDictionary(pair => pair.Key, pair => pair.Value));
}
else
{
OutputWriter.DisplayMessage(ExceptionMessages.InvalidComparisonQuery);
}
}
private static bool IsQueryForCoursePossible(string courseName)
{
if (isDataInitialized)
{
if (studentsByCourse.ContainsKey(courseName))
{
return(true);
}
else
{
OutputWriter.DisplayMessage(ExceptionMessages.InexistingCourseInDataBase);
}
}
else
{
OutputWriter.DisplayMessage(ExceptionMessages.DataNotInitializedExceptionMessage);
}
return(false);
}
private static string[] GetLinesWithPossibleMismatches(string[] actualOutputLines, string[] expectedOutputLines, out bool hasMismatch)
{
hasMismatch = false;
string output = string.Empty;
OutputWriter.WriteMessageOnNewLine("Comparing files...");
int minOutputLines = actualOutputLines.Length;
if (actualOutputLines.Length != expectedOutputLines.Length)
{
hasMismatch = true;
minOutputLines = Math.Min(actualOutputLines.Length, expectedOutputLines.Length);
OutputWriter.DisplayMessage(ExceptionMessages.ComparisonOfFilesWithDifferentSizes);
}
string[] mismatches = new string[minOutputLines];
for (int index = 0; index < minOutputLines; index++)
{
string actualLine = actualOutputLines[index];
string expectedLine = expectedOutputLines[index];
if (!actualOutputLines[index].Equals(expectedLine))
{
output = string.Format(
$"Mismatch at line {index} -- expected: \"{expectedLine}\", actual: \"{actualLine}\"");
output += Environment.NewLine;
hasMismatch = true;
}
else
{
output = actualLine;
output += Environment.NewLine;
}
mismatches[index] = output;
}
return(mismatches);
}
public static void CompareContent(string userOutputPath, string expectedOutputPath)
{
OutputWriter.WriteMessageOnNewLine("Reading files...");
try
{
string mismatchPath = GetMismatchPath(expectedOutputPath);
string[] actualOutputLines = File.ReadAllLines(userOutputPath);
string[] expectedOutputLines = File.ReadAllLines(expectedOutputPath);
bool hasMismatch;
string[] mismatches =
GetLinesWithPossibleMismatches(actualOutputLines, expectedOutputLines, out hasMismatch);
PrintOutput(mismatches, hasMismatch, mismatchPath);
OutputWriter.WriteMessageOnNewLine("Files read!");
}
catch (FileNotFoundException)
{
OutputWriter.DisplayMessage(ExceptionMessages.InvalidPath);
}
}
public static void TraverseDirectory(int depth)
{
OutputWriter.WriteEmptyLine();
int initialIdentation = SessionData.currentPath.Split('\\').Length;
Queue <string> subFolders = new Queue <string>();
subFolders.Enqueue(SessionData.currentPath);
while (subFolders.Count != 0)
{
string currentPath = subFolders.Dequeue();
int identation = currentPath.Split('\\').Length - initialIdentation;
if (depth - identation < 0)
{
break;
}
OutputWriter.WriteMessageOnNewLine($"{new string('-', identation)}{currentPath}");
try
{
foreach (var file in Directory.GetFiles(currentPath))
{
int indexOfLastSlash = file.LastIndexOf("\\");
string fileName = file.Substring(indexOfLastSlash);
OutputWriter.WriteMessageOnNewLine($"{new string('-', indexOfLastSlash) + fileName}");
}
foreach (var directory in Directory.GetDirectories(currentPath))
{
subFolders.Enqueue(directory);
}
}
catch (UnauthorizedAccessException)
{
OutputWriter.DisplayMessage(ExceptionMessages.UnauthorizedAccessExceptionMessage);
}
}
}
private static void PrintOutput(string[] mismatches, bool hasMismatch, string mismatchPath)
{
if (hasMismatch)
{
foreach (string mismatch in mismatches)
{
OutputWriter.WriteMessageOnNewLine(mismatch);
}
try
{
File.WriteAllLines(mismatchPath, mismatches);
}
catch (DirectoryNotFoundException)
{
OutputWriter.DisplayMessage(ExceptionMessages.InvalidPath);
}
}
else
{
OutputWriter.WriteMessageOnNewLine("Files are identical. There are no mismatches.");
}
}
public static void ChangeCurrentDirectoryRelative(string relativePath)
{
if (relativePath == "..")
{
try
{
string currentPath = SessionData.currentPath;
int indexOfLastSlash = currentPath.LastIndexOf("\\");
string newPath = currentPath.Substring(0, indexOfLastSlash);
SessionData.currentPath = newPath;
}
catch (ArgumentOutOfRangeException)
{
OutputWriter.DisplayMessage(ExceptionMessages.UnableToGoHigherInPartitionHierarchy);
}
}
else
{
string currentPath = SessionData.currentPath;
currentPath += "\\" + relativePath;
ChangeCurrentDirectoryAbsolute(currentPath);
}
}
private static void TryTraverseFolders(string input, string[] data)
{
if (data.Length == 1)
{
IOManager.TraverseDirectory(0);
}
else if (data.Length == 2)
{
int depth;
bool hasParsed = int.TryParse(data[1], out depth);
if (hasParsed)
{
IOManager.TraverseDirectory(depth);
}
else
{
OutputWriter.DisplayMessage(ExceptionMessages.UnableToParseNumber);
}
}
else
{
DisplayInvalidCommandMessage(input);
}
}
private static void DisplayInvalidCommandMessage(string input)
{
OutputWriter.DisplayMessage($"The command '{input}' is invalid");
}