gistfile1.txt

// Defining a struct named WhoIsCommand
// Has 3 fields
// 1. Base Command Type
// 2. target of type Name
// 3. masks of type array name

type WhoisCommand struct {
	BaseCommand
	target Name
	masks  []Name
}

// Function that takes argumemnts as a string array and a command (in this case /whois)
// WHOIS [ <target> ] <mask> *( "," <mask> )
func ParseWhoisCommand(args []string) (Command, error) {
	// Checking if we actually have an argument
  if len(args) < 1 {
		return nil, NotEnoughArgsError
	}

  // Creating two variables of type string named masks and target
	var masks string
	var target string
  
  // Checking if we have more than one argument
  // If we do assigning the passed in variable to our newly created ones
	if len(args) > 1 {
		target = args[0]
		masks = args[1]
	} else {
    // If we have have one argument assigning our arguments to masks
		masks = args[0]
	}

  // Returning the WhoIsCommand by reference.
  // See: (https://github.com/prologic/eris/blob/233238b709626fb40a8bd637674e0208746e8b33/irc/server.go#L656)
  // See: (RplWhois /irc/reply.go)
	return &WhoisCommand{
		target: NewName(target),
		masks:  NewNames(strings.Split(masks, ",")),
	}, nil
}