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Peer.java
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Peer.java
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import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Peer {
// methods
private static User login(String[] args) {
String name;
String address = null;
int port;
try {
address = InetAddress.getLocalHost().getHostAddress();
} catch (UnknownHostException exc) {
exc.printStackTrace();
}
if (args.length > 0) {
name = args[0];
port = Integer.parseInt(args[1]);
} else {
CheckFunction<String> checkName = (input) -> {
Pattern pattern = Pattern.compile("[a-zA-Z0-9_]+");
Matcher matcher = pattern.matcher(input);
if (!matcher.matches()) {
System.out.println("Sorry, the name can only contain alphanumeric characters and the underscore character.");
return false;
}
return true;
};
final String addressFinal = address;
CheckFunction<String> checkPort = (input) -> {
Pattern pattern = Pattern.compile("[0-9]+");
Matcher matcher = pattern.matcher(input);
if (!matcher.matches()) {
System.out.println("Incorrect port number, please use only numeric characters.");
return false;
}
int tmp = Integer.parseInt(input);
if (!(1023 < tmp && tmp <= 65535)) {
System.out.println("Incorrect port number, must be between 1024 and 65535.");
return false;
}
return true;
};
String input;
do {
System.out.println("Which name do you want to use?");
input = getInput();
} while (input == null || !checkName.check(input));
name = input;
do {
System.out.println("Which port do you want to use?");
input = getInput();
} while (input == null || !checkPort.check(input));
port = Integer.parseInt(input);
}
User user = new User(name, address, port);
MessageType result = SRC.addUser(user);
if (result != MessageType.OK) {
System.out.println("Sorry, this port number is already used by another player with your same IP address.");
return null;
}
return user;
}
private static boolean logout(User user) {
String key = user.getAddress() + "-" + user.getPort();
MessageType result = SRC.removeUser(key);
if (result != MessageType.OK) {
// ...
return false;
}
return true;
}
private static Game chooseGame() throws QuitApplicationException {
Game[] games = SRC.gameList();
int j = 0;
int n = 1 + (int) Math.log10(games.length);
System.out.println("The games in progress are:");
if(games.length == 0) {
System.out.println(" *** there are no games in progress ***");
} else {
for (Game game : games) {
System.out.format(" %" + n + "d. %s%n", ++j, game.getName());
}
}
System.out.println(
"To choose a game type the corresponding number,\n" +
"to create one type 0, to quit type Q."
);
CheckFunction<String> checkInput = (input) -> {
Pattern pattern = Pattern.compile("[0-9]+|q|Q");
Matcher matcher = pattern.matcher(input);
if (!matcher.matches()) {
System.out.println("Sorry, you typed an invalid character.");
return false;
}
pattern = Pattern.compile("[0-9]+");
matcher = pattern.matcher(input);
if (matcher.matches() && Integer.parseInt(input) > games.length) {
System.out.println("Sorry, you have selected a non-existent or finished game.");
return false;
}
return true;
};
String input;
do {
input = getInput();
} while (!checkInput.check(input));
switch (input) {
case "0":
return newGame();
case "q":
case "Q":
throw new QuitApplicationException();
default:
int idx = Integer.parseInt(input) - 1;
return viewGame(games[idx].getName());
}
}
private static Game newGame() {
String name;
int grid;
int score;
CheckFunction<String> checkName = (input) -> {
Pattern pattern = Pattern.compile("[a-zA-Z0-9_]+");
Matcher matcher = pattern.matcher(input);
if (!matcher.matches()) {
System.out.println("Sorry, the name can only contain alphanumeric characters and the underscore character.");
return false;
}
return true;
};
CheckFunction<String> checkGrid = (input) -> {
Pattern pattern = Pattern.compile("[0-9]+");
Matcher matcher = pattern.matcher(input);
if (!matcher.matches()) {
System.out.println("Sorry, you typed an invalid character.");
return false;
}
int tmp = Integer.parseInt(input);
if (!((tmp > 0) && (tmp % 2 == 0))) {
System.out.println("Sorry, the grid size must be an even positive number.");
return false;
}
return true;
};
CheckFunction<String> checkScore = (input) -> {
Pattern pattern = Pattern.compile("[0-9]+");
Matcher matcher = pattern.matcher(input);
if (!matcher.matches()) {
System.out.println("Sorry, you typed an invalid character.");
return false;
}
if (Integer.parseInt(input) == 0) {
System.out.println("Sorry, the target score must be a positive number.");
return false;
}
return true;
};
System.out.println(" *** CREATING A NEW GAME ***");
String input;
System.out.println("Please, type the name of the game.");
do {
input = getInput();
} while (!checkName.check(input));
name = input;
System.out.println("Please, type the size of the grid.");
do {
input = getInput();
} while (!checkGrid.check(input));
grid = Integer.parseInt(input);
System.out.println("Please, type the target score.");
do {
input = getInput();
} while (!checkScore.check(input));
score = Integer.parseInt(input);
Game game = new Game(name, grid, score);
if (SRC.addGame(game) == MessageType.GAME_NAME_UNAVAILABLE) {
System.out.println("Sorry, this name is already used by a game in progress.");
return null;
} else {
return game;
}
}
private static Game viewGame(String name) {
Message response = SRC.viewGame(name);
if (response.getType() == MessageType.GAME_NOT_EXIST) {
System.out.println("Sorry, you have selected a non-existent or finished game.");
return null;
}
Game game = (Game) Json.fromJson(response.getBody(), Game.class);
System.out.format("Game \"%s\".%n", game.getName());
System.out.format("Grid of size: %d%n", game.getGrid());
System.out.format("Target score: %d%n", game.getScore());
System.out.println("The players are:");
if(game.getUsers().isEmpty()) {
System.out.println(" *** there are no players in the game ***");
} else {
for (User user : game.getUsers()) {
System.out.format(" * %s%n", user.getName());
}
}
System.out.println("Confirm your entry to the game? (Y/N)");
CheckFunction<String> checkAnswer = (input) -> {
Pattern pattern = Pattern.compile("y|Y|n|N");
Matcher matcher = pattern.matcher(input);
if (!matcher.matches()) {
System.out.println("Sorry, you typed an invalid character.");
return false;
}
return true;
};
String input;
do {
input = getInput();
} while (!checkAnswer.check(input));
return (input.equals("n") || input.equals("N")) ? null : game;
}
// keyboard input
private static BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
private static String getInput() {
String input = null;
try {
input = bufferedReader.readLine();
} catch (IOException exc) {
exc.printStackTrace();
}
return input;
}
// main
public static void main(String[] args) {
User user;
Game game;
System.out.println(" *** Welcome to MMOG! ***");
do {
user = login(args);
} while (user == null);
try {
while (true) {
do {
game = chooseGame();
} while (game == null);
try {
(new PlayGame(user, game)).join();
} catch (InterruptedException exc) {
exc.printStackTrace();
}
System.out.println("Do you want to play another game? (Y/N)");
CheckFunction<String> checkAnswer = (input) -> {
Pattern pattern = Pattern.compile("y|Y|n|N");
Matcher matcher = pattern.matcher(input);
if (!matcher.matches()) {
System.out.println("Sorry, you typed an invalid character.");
return false;
}
return true;
};
String input;
do {
input = getInput();
} while (!checkAnswer.check(input));
if (input.equals("n") || input.equals("N")) {
throw new QuitApplicationException();
}
}
} catch (QuitApplicationException exc) {
System.out.println("Thanks for playing, see you! ;)");
logout(user);
}
}
}