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JavaScript: Pub/Sub Mediator Pattern
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window.mediator = (function(){ | |
var subscribe = function(channel, fn, _context){ | |
_context = (typeof _context != 'undefined') ? _context : this; | |
if (!mediator.channels[channel]) mediator.channels[channel] = []; | |
mediator.channels[channel].push({ context: _context, callback: fn }); | |
return _context; | |
}, | |
publish = function(channel){ | |
if (!mediator.channels[channel]) return false; | |
var args = Array.prototype.slice.call(arguments, 1); | |
for (var i = 0, l = mediator.channels[channel].length; i < l; i++) { | |
var subscription = mediator.channels[channel][i]; | |
subscription.callback.apply(subscription.context, args); | |
} | |
return this; | |
}; | |
return { | |
channels: {}, | |
publish: publish, | |
subscribe: subscribe, | |
installTo: function(obj){ | |
obj.subscribe = subscribe; | |
obj.publish = publish; | |
} | |
}; | |
}()); |
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