3.5. The Mediator Pattern (ok)

C:\xampp\htdocs\php\js\main.js

require(['mediator/init'],function(init) {
	var examples = {
		mediator: init
	}
	for (var example in examples) {
		examples[example].init();
	}
});

C:\xampp\htdocs\php\js\mediator\init.js

define(function(require) {
  'use strict';
  return {
    init: function() {
      var mediator, colleague1, colleague2, colleague3;
      var Mediator = require('mediator/mediator');
      var colleague = require('mediator/colleague');
      mediator = new Mediator();
      colleague1 = colleague.create('colleague1', mediator);
      colleague2 = colleague.create('colleague2', mediator);
      colleague3 = colleague.create('colleague3', mediator);
      colleague1.sendMessage('Hey there', 'colleague2');
      colleague2.sendMessage('Hi colleague1', 'colleague1');
      colleague3.sendMessage('Hey guys!');
    }
  };
});

C:\xampp\htdocs\php\js\mediator\colleague.js

define(function() {
  'use strict';
  var Colleague = function(id, mediator) {
    this.id = id;
    this.mediator = mediator;
  };
  Colleague.prototype.receiveMessage = function(message) {
    console.log('Module', this.id, 'received message:', message);
    return true;
  };
  Colleague.prototype.sendMessage = function(message, recipientId) {
    (recipientId) ? this.mediator.send(recipientId, message): this.mediator.broadcast(message, this);
  };
  return {
    create: function(id, mediator) {
      var that = new Colleague(id, mediator);
      mediator.register(that);
      return that;
    }
  };
});

C:\xampp\htdocs\php\js\mediator\mediator.js

define(function() {
  'use strict';
  var Mediator = function() {
    this.colleagues = [];
  };
  Mediator.prototype.register = function(colleague) {
    this.colleagues.push(colleague);
  };
  Mediator.prototype.send = function(recipientId, message) {
    this.colleagues.some(function(colleague) {
      if (colleague.id === recipientId) {
        return colleague.receiveMessage(message);
      }
    });
  };
  Mediator.prototype.broadcast = function(message, sender) {
    this.colleagues.forEach(function(colleague) {
      if (colleague.id !== sender.id) {
        colleague.receiveMessage(message);
      }
    });
  };
  return Mediator;
});