Attache.js

Javascript implementation of Aspect Oriented Programming paradigm, enclosed in Node.js module

How to use:

var attache = require('attache.js');

attache.after(some_object, "some_object_function", function() {
	// Code which will be executed _after_ some.object.some_function() call	
});

attache.once_after(some_object, "some_object_function", function() {
	// Code which will be executed _only once_ after some.object.some_function() call	
});

// Removing aspect function
// Note: basically, we need to have stored aspect function in the value to pass it properly to remove function
attache.remove_after(some_object, some_object_function, aspect_function);

attache.before(some_object, "some_object_function", function() {
	// Code which will be executed _before_ some.object.some_function() call	
});

attache.once_before(some_object, "some_object_function", function() {
	// Code which will be executed _only once_ before some.object.some_function() call	
});

// Removing aspect function
// Note: basically, we need to have stored aspect function in the value to pass it properly to remove function
attache.remove_before(some_object, "some_object_function", aspect_function);

Example:

attache = require('attache.js');

var obj = {
  test: function(x) { return x; }
};

var fake = function() {
  var fake_val = 100;
  attache.before(obj, "test", function() {
  	console.log(fake_val);
	console.log(arguments);    
  });
}

fake();
console.log(obj.test(2, 3, 4));

Output:

100
{ '0': 2, '1': 3, '2': 4 }
2