foul-magics/Mage/src/main/java/mage/watchers/common/PlayersAttackedThisTurnWatcher.java

package mage.watchers.common;

import mage.constants.WatcherScope;
import mage.game.Game;
import mage.game.events.GameEvent;
import mage.players.PlayerList;
import mage.watchers.Watcher;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

/**
 * @author JayDi85
 */
public class PlayersAttackedThisTurnWatcher extends Watcher {

    // how many players or opponents each player attacked this turn
    private final Map<UUID, PlayerList> playersAttackedThisTurn = new HashMap<>();
    private final Map<UUID, PlayerList> opponentsAttackedThisTurn = new HashMap<>();

    public PlayersAttackedThisTurnWatcher() {
        super(WatcherScope.GAME);
    }

    @Override
    public void watch(GameEvent event, Game game) {
        if (event.getType() == GameEvent.EventType.BEGINNING_PHASE_PRE) {
            playersAttackedThisTurn.clear();
            opponentsAttackedThisTurn.clear();
        }

        if (event.getType() == GameEvent.EventType.ATTACKER_DECLARED) {

            // players
            PlayerList playersAttacked = playersAttackedThisTurn.get(event.getPlayerId());
            if (playersAttacked == null) {
                playersAttacked = new PlayerList();
            }
            UUID playerDefender = game.getCombat().getDefendingPlayerId(event.getSourceId(), game);
            if (playerDefender != null
                    && !playersAttacked.contains(playerDefender)) {
                playersAttacked.add(playerDefender);
            }
            playersAttackedThisTurn.putIfAbsent(event.getPlayerId(), playersAttacked);

            // opponents
            PlayerList opponentsAttacked = opponentsAttackedThisTurn.get(event.getPlayerId());
            if (opponentsAttacked == null) {
                opponentsAttacked = new PlayerList();
            }
            UUID opponentDefender = game.getCombat().getDefendingPlayerId(event.getSourceId(), game);
            if (opponentDefender != null
                    && game.getOpponents(event.getPlayerId()).contains(opponentDefender)
                    && !opponentsAttacked.contains(opponentDefender)) {
                opponentsAttacked.add(opponentDefender);
            }
            opponentsAttackedThisTurn.putIfAbsent(event.getPlayerId(), opponentsAttacked);
        }
    }

    public int getAttackedPlayersCount(UUID playerID) {
        PlayerList defendersList = playersAttackedThisTurn.getOrDefault(playerID, null);
        if (defendersList != null) {
            return defendersList.size();
        }
        return 0;
    }

    public int getAttackedOpponentsCount(UUID playerID) {
        PlayerList defendersList = opponentsAttackedThisTurn.getOrDefault(playerID, null);
        if (defendersList != null) {
            return defendersList.size();
        }
        return 0;
    }
}