public static void help(string command)
{
if (command == "help")
{
Output.writeOut("'help' displays information about how to use a specific command.\nFor instance, 'help diff' shows how to use diff.");
}
else if (command == "diff")
{
Output.writeOut("'diff' returns the difference between two files.\nFor intance, 'diff fileOne.txt fileTwo.txt' will return the differences between those two files.\n'diff' takes at least two arguments.");
}
else if (command == "quit")
{
Output.writeOut("'quit' will quit from the program.\nFor instance, 'quit' will close the console window.");
}
else
{
UnknownCommand.unknownCommand(command); //If the command isn't listed in the help command, raise an error.
}
}
public void parse(string userInput) //Take the user's input as an argument
{
var words = userInput.Split(" "); //And split it into the seperate words
if (words[0] == "help") //Check what the first (command) word is
{
try
{
HelpCommand.help(words[1]); //If there's a command afterwards, for specific help, attempt to use that
}
catch (IndexOutOfRangeException)
{
HelpCommand.help(words[0]); //Else use "help" as the help argument
}
}
else if (words[0] == "diff")
{
List <List <string[]> > contents = new List <List <string[]> >(); //Create a new empty string to put the file contents
try
{
contents = FileRead.Read(words[1], words[2]); //Attempt to read the files given
}
catch (IndexOutOfRangeException) //If only one file was given
{
UnknownCommand.unknownArgument("diff"); //Raise an error
contents = FileRead.Read("nullOne.txt", "nullTwo.txt"); //Proceed with empty files to prevent later issues
}
catch (NullReferenceException) //If the tile is not a readable file
{
UnknownCommand.errorArgument("diff");
contents = FileRead.Read("nullOne.txt", "nullTwo.txt");
}
Diff.Difference(contents); //Find the difference using the contents
}
else if (words[0] == "debug") //Debug allows for quick testing of the diff command
{
List <List <string[]> > contents = new List <List <string[]> >();
try
{
contents = FileRead.Read("test1.txt", "test2.txt"); //The only two text files used are the test files.
}
catch (IndexOutOfRangeException)
{
UnknownCommand.unknownArgument("diff");
}
catch (NullReferenceException)
{
UnknownCommand.errorArgument("diff");
}
Diff.Difference(contents); //Custom files are ignored.
}
else if (words[0] == "quit")
{
Output.writeOut("Exiting the console...");
Environment.Exit(0); //Gracefully exit the console.
}
else if (words[0] == "" || words[0] == " ") //If the user accidentally enters nothing
{
Console.WriteLine(""); //Don't throw an error, just ignore it and move on
}
else
{
UnknownCommand.unknownCommand(words[0]); //If nothing is recognised, raise an error.
}
}