private void FileBtn_Click(object sender, EventArgs e)
{
OutputTxt.Text = "";
Digraph graph = new Digraph();
GraphImg.Image = GraphImg.InitialImage;
OpenFileDialog ofd = new OpenFileDialog
{
Filter = "TXT|*.txt"
};
if (ofd.ShowDialog() == DialogResult.OK)
{
FilePathTxt.Text = ofd.FileName;
}
Parser p = new Parser();
graph = p.Parse(FilePathTxt.Text, ref OutputTxt);
GraphImg.Image = Image.FromFile(graph.SaveGraphAsImg(IMG_PATH));
GraphImg.Focus();
}
public BestExchange(Digraph graph)
{
vertices = graph.nodes;
edges = graph.edges;
path = new List <CurrencyVertex>();
}
public Arbitrage(Digraph graph)
{
digraph = graph;
vertices = graph.nodes;
edges = graph.edges;
}
public Digraph Parse(string input, ref TextBox outputTxt)
{
Digraph parsed = new Digraph();
try
{
var lines = new List <string>();
using (var reader = new StreamReader(input))
{
string line;
while ((line = reader.ReadLine()) != null)
{
lines.Add(line);
}
}
int hashCounter = 0;
foreach (var line in lines)
{
if (line.StartsWith("#"))
{
hashCounter++;
}
}
if (hashCounter != 2)
{
throw new Exception("There should be two comment lines, each starting with a hash symbol. " +
"Currently there are " + hashCounter + " such lines");
}
if (!lines.Find(x => x.StartsWith("#")).Equals("# Waluty (id | symbol | pełna nazwa)"))
{
throw new Exception("The 1st comment line not correct. Expected: # Waluty (id | symbol | pełna nazwa)");
}
else if (!lines.FindLast(x => x.StartsWith("#")).Equals("# Kursy walut (id | symbol (waluta wejściowa) | symbol (waluta wyjściowa) | kurs | typ opłaty | opłata"))
{
throw new Exception("The 2nd comment line not correct. Expected: # Kursy walut (id | symbol (waluta wejściowa) | symbol (waluta wyjściowa) | kurs | typ opłaty | opłata");
}
int secondCommentLine = lines.FindLastIndex(x => x.StartsWith("#"));
for (int i = 1; i < secondCommentLine; i++)
{
string[] words = lines[i].Split();
for (int j = 2; j < words.Length; j++)
{
if (!words[j].Equals(words[j].ToLower()))
{
throw new Exception("Currency long name has to be all lowercase. Line: " + (i + 1));
}
if (words[j].Any(c => char.IsDigit(c)))
{
throw new Exception("Currency long name cannot contain digits. Line: " + (i + 1));
}
}
if (words.Length < 3)
{
throw new Exception("There are " + words.Length + " elements in line " + (i + 1) + ". There should be at least 3.");
}
else if (words[1].Length != 3)
{
throw new Exception("Impossible currency symbol at line " + (i + 1) + ": " + words[1]);
}
else if (!words[1].Equals(words[1].ToUpper()))
{
throw new Exception("Currency symbol has to be uppercase. Invalid symbol: " + words[1] + ", at line: " + (i + 1));
}
else if (!int.TryParse(words[0], out var res))
{
throw new Exception("IDs have to be integers. Line: " + (i + 1));
}
else if (int.Parse(words[0]) != i - 1)
{
throw new Exception("IDs in input file have to be in ascending order, unique, starting from 0.");
}
parsed.nodes.Add(new CurrencyVertex(words[1]));
}
for (int i = ++secondCommentLine; i < lines.Count; i++)
{
string[] words = lines[i].Split();
double rate = 0, fee = 0;
if (parsed.nodes.Find(x => x.Symbol.Equals(words[1])) == null)
{
throw new Exception("At line " + (i + 1) + ": " + "There is no such currency symbol as: " + words[1]);
}
else if (parsed.nodes.Find(x => x.Symbol.Equals(words[2])) == null)
{
throw new Exception("At line " + (i + 1) + ": " + "There is no such currency symbol as: " + words[2]);
}
else if (words.Length < 6)
{
throw new Exception("Not enough words in line: " + (i + 1) + ". There should be 6 words, instead of: " + words.Length);
}
else if (words.Length > 6)
{
throw new Exception("Too many words in line: " + (i + 1) + ". There should be 6 words, instead of: " + words.Length);
}
else if (!double.TryParse(words[3], out rate))
{
throw new Exception("Exchange rate cannot be read from: " + words[3] + ". Line: " + (i + 1));
}
else if (!double.TryParse(words[5], out fee))
{
throw new Exception("Exchange fee cannot be read from: " + words[5] + ". Line: " + (i + 1));
}
else if (!int.TryParse(words[0], out var res))
{
throw new Exception("IDs have to be integers. Line: " + (i + 1));
}
else if (int.Parse(words[0]) != i - secondCommentLine)
{
throw new Exception("IDs in input file have to be in ascending order, unique, starting from 0. Invalid line: " + (i + 1));
}
int feeType;
if (words[4].Equals("STAŁA"))
{
feeType = (int)ExchangeEdge.ChargeType.Standing;
}
else if (words[4].Equals("PROC"))
{
feeType = (int)ExchangeEdge.ChargeType.Percent;
}
else
{
throw new Exception("Unknown charge type: " + words[4] + ". Could not load the whole graph!");
}
parsed.edges.Add(new ExchangeEdge(parsed.nodes.Find(x => x.Symbol == words[1]),
parsed.nodes.Find(x => x.Symbol == words[2]),
rate,
feeType,
fee));
}
}
catch (Exception e)
{
outputTxt.Text = "Exception: " + e.Message;
}
return(parsed);
}