static void Main(string[] args)
{
string filePath = "dbcore.xml";
bool cycleProgram = true;
XmlSerializer formatter = new XmlSerializer(typeof(Test[]));
Console.WriteLine("TEST SYSTEM 'Sirik-9000' initialised");
Console.WriteLine("");
BTree <Test> tests = new BTree <Test>(default(Test));
while (cycleProgram)
{
string query = "";
Console.Write("> ");
query = Console.ReadLine();
Console.Write("");
var queryTokens = query.Split(' ');
switch (queryTokens[0])
{
case "exit":
{
Console.WriteLine("Exiting program...");
cycleProgram = false;
break;
}
case "create":
{
try
{
if (tests.Value is null)
{
tests.Value = new Test {
StudentName = queryTokens[1].ToString(), TestName = queryTokens[2].ToString(), TestPassDate = DateTime.Parse(queryTokens[3].ToString()), Mark = int.Parse(queryTokens[4])
}
}
;
else
{
tests.BranchLeft(new Test {
StudentName = queryTokens[1].ToString(), TestName = queryTokens[2].ToString(), TestPassDate = DateTime.Parse(queryTokens[3].ToString()), Mark = int.Parse(queryTokens[4])
});
}
}
catch
{
Console.WriteLine("Invalid arguments!");
}
break;
}
case "read":
{
try
{
if (queryTokens[1] == "-a")
{
int i = 0;
var resultquery = tests.ToArray();
Console.WriteLine("All records:");
foreach (Test item in resultquery)
{
Console.WriteLine($"{i}. '{item.StudentName}' wrote the test '{item.TestName}' in {item.TestPassDate.Year}-{item.TestPassDate.Month}-{item.TestPassDate.Day} with total points {item.Mark.ToString()}");
i++;
}
Console.WriteLine("");
}
else if (queryTokens[1] == "-p")
{
var resultquery = from t in tests.ToArray()
orderby t.Mark descending
where t.Mark >= int.Parse(queryTokens[2])
select t;
Console.WriteLine($"Students, that passed {queryTokens[2]} mark criteria:");
foreach (Test item in resultquery)
{
Console.WriteLine($"'{item.StudentName}' wrote the test '{item.TestName}' in {item.TestPassDate.Year}-{item.TestPassDate.Month}-{item.TestPassDate.Day} with total points {item.Mark.ToString()}");
}
Console.WriteLine("");
}
else if (queryTokens[1] == "-i")
{
var resultquery = tests.ToArray()[int.Parse(queryTokens[2])];
Console.WriteLine($"Student with index {int.Parse(queryTokens[2])}");
Console.WriteLine($"'{resultquery.StudentName}' wrote the test '{resultquery.TestName}' in {resultquery.TestPassDate.Year}-{resultquery.TestPassDate.Month}-{resultquery.TestPassDate.Day} with total points {resultquery.Mark.ToString()}");
Console.WriteLine("");
}
else if (queryTokens[1] == "-c")
{
int resultquery = tests.ToArray().Length;
Console.WriteLine($"Records in DB {resultquery}");
Console.WriteLine("");
}
else if (queryTokens[1] == "-s")
{
int i = 0;
var resultquery = from t in tests.ToArray()
orderby t.Mark descending
select t;
Console.WriteLine("Sorted records:");
foreach (Test item in resultquery)
{
Console.WriteLine($"{i}. '{item.StudentName}' wrote the test '{item.TestName}' in {item.TestPassDate.Year}-{item.TestPassDate.Month}-{item.TestPassDate.Day} with total points {item.Mark.ToString()}");
i++;
}
Console.WriteLine("");
}
else
{
Console.WriteLine("Invalid arguments!");
}
}
catch
{
Console.WriteLine("Invalid arguments!");
}
break;
}
case "update":
{
try
{
if (queryTokens[1] == "-n")
{
tests[int.Parse(queryTokens[2])].Value.StudentName = queryTokens[3].ToString();
}
else if (queryTokens[1] == "-t")
{
tests[int.Parse(queryTokens[2])].Value.TestName = queryTokens[3].ToString();
}
else if (queryTokens[1] == "-d")
{
tests[int.Parse(queryTokens[2])].Value.TestPassDate = DateTime.Parse(queryTokens[3]);
}
else if (queryTokens[1] == "-m")
{
tests[int.Parse(queryTokens[2])].Value.Mark = int.Parse(queryTokens[3]);
}
else
{
Console.WriteLine("Invalid arguments!");
}
}
catch
{
Console.WriteLine("Invalid arguments!");
}
break;
}
case "drop":
{
try
{
if ((tests[int.Parse(queryTokens[1]) - 1]?.LeftLink?.Value is null))
{
tests[int.Parse(queryTokens[1]) - 1] = new BTerminal <Test>(default(Test));
}
else
{
tests[int.Parse(queryTokens[1]) - 1] = tests[int.Parse(queryTokens[1]) - 1].LeftLink;
}
}
catch
{
Console.WriteLine("Invalid arguments!");
}
break;
}
