relu-core/modules/rp/lib/handled.js

Core for bot

var base = require("./base");

module.exports = function rpHandled(origin, changedHandler, addedHandler, removedHandler) {
	var p = base();
	p.constructor = rpHandled;

	if(!addedHandler && !removedHandler) {
		var orgChangedHandler = changedHandler;
		changedHandler = function() {
			orgChangedHandler(p());
		};
		origin.onChanged(changedHandler);
	} else {
		addedHandler = addedHandler || function(){};
		removedHandler = removedHandler || function(){};
		origin.onUpdated(changedHandler);
		origin.onAdded(addedHandler);
		origin.onRemoved(removedHandler);
	}
	origin.ref(p);

	p.onceDisposed(function() {
		if(!addedHandler && !removedHandler) {
			origin.removeChangedListener(changedHandler);
		} else {
			origin.removeUpdatedListener(changedHandler);
			origin.removeAddedListener(addedHandler);
			origin.removeRemovedListener(removedHandler);
		}
		origin.unref(p);
	});

	p._getUndependend = p._get = function() {
		return origin._getUndependend();
	};

	return p;
};