JavaScript設計模式之中介者模式詳解

function Player(name) {
	this.name = name
	this.enemy = null; // 敵人
};
Player.prototype.win = function () {
	console.log(this.name + ' won ');
};
Player.prototype.lose = function () {
	console.log(this.name + ' lost');
};
Player.prototype.die = function () {
	this.lose();
	this.enemy.win();
};

const player1 = new Player('玩傢一');
const player2 = new Player('玩傢二');

player1.enemy = player2; 
player2.enemy = player1;

player1.die();// 輸出：玩傢一 lost、玩傢二 won 

player1.partners = [player1, player2, player3, player4];
player1.enemies = [player5, player6, player7, player8];
Player5.partners = [player5, player6, player7, player8];
Player5.enemies = [player1, player2, player3, player4];

const players = []; 

function Player(name, teamColor) {
	this.partners = []; // 隊友列表
	this.enemies = []; // 敵人列表
	this.state = 'live'; // 玩傢狀態
	this.name = name; // 角色名字
	this.teamColor = teamColor; // 隊伍顏色
};

Player.prototype.win = function () { // 玩傢團隊勝利
	console.log('winner: ' + this.name);
};
Player.prototype.lose = function () { // 玩傢團隊失敗
	console.log('loser: ' + this.name);
};

Player.prototype.die = function () { // 玩傢死亡
	let all_dead = true;
	this.state = 'dead'; // 設置玩傢狀態為死亡
	for (let i = 0; i < this.partners.length; i++) { // 遍歷隊友列表
		if (this.partners[i].state !== 'dead') { // 如果還有一個隊友沒有死亡，則遊戲還未失敗
			all_dead = false;
			break;
		}
	}
	if (all_dead === true) { // 如果隊友全部死亡
		this.lose(); // 通知自己遊戲失敗
		for (let i = 0; i < this.partners.length; i++) { // 通知所有隊友玩傢遊戲失敗
			this.partners[i].lose();
		}
		for (let i = 0; i < this.enemies.length; i++) { // 通知所有敵人遊戲勝利
			this.enemies[i].win();
		}
	}
};

const playerFactory = function (name, teamColor) {
	const newPlayer = new Player(name, teamColor); // 創建新玩傢
	for (let i = 0; i < players.length; i++) { // 通知所有的玩傢，有新角色加入
		if (players[i].teamColor === newPlayer.teamColor) { // 如果是同一隊的玩傢
			players[i].partners.push(newPlayer); // 相互添加到隊友列表
			newPlayer.partners.push(players[i]);
		} else {
			players[i].enemies.push(newPlayer); // 相互添加到敵人列表
			newPlayer.enemies.push(players[i]);
		}
	}
	players.push(newPlayer);
	return newPlayer;
};

//紅隊：
var player1 = playerFactory('皮蛋', 'red'),
	player2 = playerFactory('小乖', 'red'),
	player3 = playerFactory('寶寶', 'red'),
	player4 = playerFactory('小強', 'red');
//藍隊：
var player5 = playerFactory('黑妞', 'blue'),
	player6 = playerFactory('蔥頭', 'blue'),
	player7 = playerFactory('胖墩', 'blue'),
	player8 = playerFactory('海盜', 'blue');

player1.die();
player2.die();
player4.die();
player3.die();

function Player(name, teamColor) {
	this.name = name; // 角色名字
	this.teamColor = teamColor; // 隊伍顏色 
	this.state = 'alive'; // 玩傢生存狀態
};
Player.prototype.win = function () {
	console.log(this.name + ' won ');
};
Player.prototype.lose = function () {
	console.log(this.name + ' lost');
};
/*******************玩傢死亡*****************/
Player.prototype.die = function () {
	this.state = 'dead';
	playerDirector.reciveMessage('playerDead', this); // 給中介者發送消息，玩傢死亡
};
/*******************移除玩傢*****************/
Player.prototype.remove = function () {
	playerDirector.reciveMessage('removePlayer', this); // 給中介者發送消息，移除一個玩傢
};
/*******************玩傢換隊*****************/
Player.prototype.changeTeam = function (color) {
	playerDirector.reciveMessage('changeTeam', this, color); // 給中介者發送消息，玩傢換隊
};

const playerFactory = function (name, teamColor) {
	const newPlayer = new Player(name, teamColor); // 創造一個新的玩傢對象
	playerDirector.reciveMessage('addPlayer', newPlayer); // 給中介者發送消息，新增玩傢
	return newPlayer;
};

const playerDirector = (function () {
	const players = {}, // 保存所有玩傢
		operations = {}; // 中介者可以執行的操作
	/**
	 * 新增一個玩傢
	 * @param {Player} player 玩傢
	 */
	operations.addPlayer = function (player) {
		const teamColor = player.teamColor; // 玩傢的隊伍顏色
		// 如果該顏色的玩傢還沒有成立隊伍，則新成立一個隊伍
		players[teamColor] = players[teamColor] || [];
		players[teamColor].push(player); // 添加玩傢進隊伍
	};
	/**
	 * 移除一個玩傢
	 * @param {Player} player 玩傢
	 */
	operations.removePlayer = function (player) {
		const teamColor = player.teamColor, // 玩傢的隊伍顏色
			teamPlayers = players[teamColor] || []; // 該隊伍所有成員
		for (let i = teamPlayers.length - 1; i >= 0; i--) { // 遍歷刪除
			if (teamPlayers[i] === player) {
				teamPlayers.splice(i, 1);
			}
		}
	};
	/**
	 * 玩傢換隊
	 * @param {Player} player 玩傢
	 * @param {string} newTeamColor 隊伍顏色
	 */
	operations.changeTeam = function (player, newTeamColor) { // 玩傢換隊
		operations.removePlayer(player); // 從原隊伍中刪除
		player.teamColor = newTeamColor; // 改變隊伍顏色
		operations.addPlayer(player); // 增加到新隊伍中
	};
	/**
	 * 玩傢死亡
	 * @param {Player} player 玩傢
	 */
	operations.playerDead = function (player) {
		const teamColor = player.teamColor,
			teamPlayers = players[teamColor]; // 玩傢所在隊伍
		let all_dead = true;
		for (let i = 0; i < teamPlayers.length; i++) {
			if (teamPlayers[i].state !== 'dead') {
				all_dead = false;
				break;
			}
		}
		if (all_dead) { // 全部死亡
			for (let i = 0; i < teamPlayers.length; i++) {
				teamPlayers[i].lose(); // 本隊所有玩傢 lose 
			}
			for (const color in players) {
				if (color !== teamColor) {
					const teamPlayers = players[color]; // 其他隊伍的玩傢
					for (let i = 0; i < teamPlayers.length; i++) {
						teamPlayers[i].win(); // 其他隊伍所有玩傢 win 
					}
				}
			}
		}
	};
	const reciveMessage = function () {
		// arguments 的第一個參數為消息名稱
		const message = Array.prototype.shift.call(arguments); 
		operations[message].apply(this, arguments);
	};
	return {
		reciveMessage
	}
})();

// 紅隊：
var player1 = playerFactory('皮蛋', 'red'),
	player2 = playerFactory('小乖', 'red'),
	player3 = playerFactory('寶寶', 'red'),
	player4 = playerFactory('小強', 'red');
// 藍隊：
var player5 = playerFactory('黑妞', 'blue'),
	player6 = playerFactory('蔥頭', 'blue'),
	player7 = playerFactory('胖墩', 'blue'),
	player8 = playerFactory('海盜', 'blue');
player1.die();
player2.die();
player3.die();
player4.die();

player1.remove(); 
player2.remove(); 
player3.die(); 
player4.die(); 

player1.changeTeam( 'blue' ); 
player2.die(); 
player3.die(); 
player4.die();