Verbs.java

import java.util.Scanner;
import java.util.Vector;

public class Verbs{

	static final String EOL = System.getProperty("line.separator");
	
	/**
	* Prints whitespace, finds the verb.
	*/
	public static void parse(String input)
	{
		if (!input.equals("")) {
			Scanner scan = new Scanner(input.toLowerCase());
			String i = scan.next(); //first word
			Vector<String> words = new Vector<String>(); //remaining words
			if(!scan.hasNext()){words.add("");}
			else{while(scan.hasNext()){words.add(scan.next());}}
			scan.close();
			System.out.println(EOL);

			//The following act on the verb, passing arguments if necessary
			//The string 'words' contains any arguments,
			if (i.equals("north") || i.equals("n")) {north();}
			else if (i.equals("east") || i.equals("e")) {east();}
			else if (i.equals("south") || i.equals("s")) {south();}
			else if (i.equals("west") || i.equals("w")) {west();}
			else if (i.equals("up") || i.equals("u")) {up();}
			else if (i.equals("down") || i.equals("d")) {down();}
			else if (i.equals("use")) {use(words);}
			else if (i.equals("talk")) {talk(words);}
			else if (i.equals("examine") || i.equals("x")) {examine(words);}
			else if (i.equals("look") || i.equals("l")) {look();}
			else if (i.equals("inventory") || i.equals("i")) {inventory();}
			else if (i.equals("exit") || i.equals("quit")) {System.exit(0);}
			else if (i.equals("help") || i.equals("?")) {help();}
			else if (i.equals("save") || i.equals("save game")){save();}
			else if (i.equals("load") || i.equals("load game")){load();}
			else {nope();}
		}
	}
	
	private static void north()
	{
		if(World.getRoom(Exe.getX(), Exe.getY(), Exe.getZ()).checkExit(0)){
			int z = Exe.getZ();
			Exe.setZ(z+1);
			look();
		}
		else{
			nope();
		}
	}

	private static void east()
	{
		if(World.getRoom(Exe.getX(), Exe.getY(), Exe.getZ()).checkExit(2)){
			int x = Exe.getX();
			Exe.setX(x+1);
			look();
		}
		else{
			nope();
		}
	}

	private static void south()
	{
		if(World.getRoom(Exe.getX(), Exe.getY(), Exe.getZ()).checkExit(1)){
			int z = Exe.getZ();
			Exe.setZ(z-1);
			look();
		}
		else{
			nope();
		}
	}

	private static void west()
	{
		if(World.getRoom(Exe.getX(), Exe.getY(), Exe.getZ()).checkExit(3)){
			int x = Exe.getX();
			Exe.setX(x-1);
			look();
		}
		else{
			nope();
		}
	}

	private static void up()
	{
		if(World.getRoom(Exe.getX(), Exe.getY(), Exe.getZ()).checkExit(4)){
			int y = Exe.getY();
			Exe.setY(y+1);
			look();
		}
		else{
			nope();
		}
	}

	private static void down()
	{
		if(World.getRoom(Exe.getX(), Exe.getY(), Exe.getZ()).checkExit(5)){
			int y = Exe.getY();
			Exe.setY(y-1);
			look();
		}
		else{
			nope();
		}
	}

	private static void use(Vector<String> i)
	{
		try
		{
			System.out.println(Player.getInv().getItem(i.firstElement()).getUseEffect());
		}
		catch (IllegalArgumentException ex) {}
		try
		{
			System.out.println(World.getRoom(Exe.getX(),Exe.getY(),Exe.getZ()).getItems().getItem(i.firstElement()).getUseEffect());
		}
		catch (IllegalArgumentException ex)
		{
			nope();
		} 
	}

	private static void talk(Vector<String> i)
	{
		try {
			if(Player.getInv().getItem(i.firstElement()).getCanTalk()) {
				Player.getInv().getItem(i.firstElement()).talk();
			}
			else {
				System.out.println("No response...");
			}
		}
		catch (IllegalArgumentException ex) {}
		try {
			if(World.getRoom(Exe.getX(),Exe.getY(),Exe.getZ()).getItems().getItem(i.firstElement()).getCanTalk()) {
				World.getRoom(Exe.getX(),Exe.getY(),Exe.getZ()).getItems().getItem(i.firstElement()).talk();
			}
			else {
				System.out.println("No response...");
			}
		}
		catch (IllegalArgumentException ex)
		{
			nope();
		}
	}

	private static void examine(Vector<String> i)
	{
		try
		{
			System.out.println(Player.getInv().getItem(i.firstElement()).getDescription());
		}
		catch (IllegalArgumentException ex) {}
		try
		{
			System.out.println(World.getRoom(Exe.getX(),Exe.getY(),Exe.getZ()).getItems().getItem(i.firstElement()).getDescription());
		}
		catch (IllegalArgumentException ex)
		{
			nope();
		} 
	}

	private static void look(){
		World.getRoom(Exe.getX(),Exe.getY(),Exe.getZ()).printRoom();
	}

	private static void inventory(){
		Player.getInv().printItems();
	}

	private static void help(){
		System.out.println(
			"Here's what you can do: (type indicated letter or full word)" + EOL +
			"You can go (n)orth, (s)outh, (e)ast, or (w)est." + EOL +
			"Sometimes, you can even go (u)p or (d)own." + EOL +
			"You can (use) an item, or e(x)amine one in your (i)nventory." + EOL +
			"You can always take a (l)ook around, and if all else fails," + EOL +
			"you can always (quit) and never, ever, ever come back.");
	}

	private static void save(){
		Exe.saveFile();
	}

	private static void load(){
		Exe.readSaveFile("adventure_save.txt");
	}

	public static void nope(){
		System.out.println("I can't do that, Dave.");
	}
	
}