Allows intercepting require.js define events. This is useful in userscripts that modify sites created using require.js

rjs-interceptor.js

/* jshint -W097 */
/* global require: true */
'use strict';

// If you want to hide categories from the budget overview, you can put their
// id's here. They will still be visibile on the budgets page.
var hide_budgets = [1404, 506, 204, 103];

//! require.js events

var initialize = function() {
	require(['underscore'], function(_) {
		var context = require.s.contexts._;
		var module = context.Module;
		var events = context.config.events;

		// we need to intercept init so that we can add custom event listeners to require.js modules

		var oldInit = module.prototype.init;

		module.prototype.init = function() {
			var self = this;

			// if we have listeners that haven't been added yet, add them now
			if(events && events[this.map.id]) {
				_.each(events[this.map.id], function(handlers, type) {
					_.each(handlers, function(handler) {
						self.on(type, handler.bind(self));
					});
				});

				// remove the temporary event listeners now that they've been added
				delete events[this.map.id];
			}

			return oldInit.apply(this, arguments);
		};
	});
};

if(typeof require === 'function') {
	require(['libs'], initialize);
	require.s.contexts._.config.events = {};
}
else {
	require.callback = initialize;
	require.deps = ['libs'];
	require.events = {};
}

// onRequire function
// Purpose: stores an event listener in the require.js config. it will be attached once the module is defined.
// Parameters: the id of the module, the event type, and the callback.
// Returns: none
var onRequire = function(id, event, callback) {
	var events = require.s ? require.s.contexts._.config.events : require.events;

	events[id] = events[id] || {};
	events[id][event] = events[id][event] || [];
	events[id][event].push(callback);
};

//! implementation examples

//! mint-better-account-overview

// swaps the institution name with the account name in the left sidebar
onRequire('views/authenticated/overview/modules/accounts/CashAccountView', 'defined', function(cashView) {
	var old = cashView.prototype.initialize;

	cashView.prototype.initialize = function() {
		old.apply(this, arguments);
		this._swapNames = false;
	};
});

// removes desired categories from buget overview
onRequire('legacy/js/overview/budget/OverviewBudgetList', 'defined', function() {
	/* global $M: true, _:true */

	var prototype = $M.OverviewBudgetList.prototype;
	var oldSetData = prototype.setData;

	prototype.setData = function(data) {
		data.budgets = _.filter(data.budgets, function(budget) {
			return (hide_budgets.indexOf(budget.category.id) === -1);
		});

		return oldSetData.apply(this, arguments);
	};
});