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// ==========================================
// Copyright 2013 Twitter, Inc
// Licensed under The MIT License
// ==========================================
"use strict";
define(
[
'./utils',
'./compose'
],
function (util, compose) {
var advice = {
around: function(base, wrapped) {
return function composedAround() {
// unpacking arguments by hand benchmarked faster
var i = 0, l = arguments.length, args = new Array(l + 1);
args[0] = base.bind(this);
for (; i < l; i++) args[i + 1] = arguments[i];
return wrapped.apply(this, args);
}
},
before: function(base, before) {
var beforeFn = (typeof before == 'function') ? before : before.obj[before.fnName];
return function composedBefore() {
beforeFn.apply(this, arguments);
return base.apply(this, arguments);
}
},
after: function(base, after) {
var afterFn = (typeof after == 'function') ? after : after.obj[after.fnName];
return function composedAfter() {
var res = (base.unbound || base).apply(this, arguments);
afterFn.apply(this, arguments);
return res;
}
},
// a mixin that allows other mixins to augment existing functions by adding additional
// code before, after or around.
withAdvice: function() {
['before', 'after', 'around'].forEach(function(m) {
this[m] = function(method, fn) {
compose.unlockProperty(this, method, function() {
if (typeof this[method] == 'function') {
return this[method] = advice[m](this[method], fn);
} else {
return this[method] = fn;
}
});
};
}, this);
}
};
return advice;
}
);