pipe.js•1.18 kB
'use strict';
var aFrom = require('es5-ext/array/from')
, remove = require('es5-ext/array/#/remove')
, value = require('es5-ext/object/valid-object')
, d = require('d')
, emit = require('./').methods.emit
, defineProperty = Object.defineProperty
, hasOwnProperty = Object.prototype.hasOwnProperty
, getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
module.exports = function (e1, e2/*, name*/) {
var pipes, pipe, desc, name;
(value(e1) && value(e2));
name = arguments[2];
if (name === undefined) name = 'emit';
pipe = {
close: function () { remove.call(pipes, e2); }
};
if (hasOwnProperty.call(e1, '__eePipes__')) {
(pipes = e1.__eePipes__).push(e2);
return pipe;
}
defineProperty(e1, '__eePipes__', d('c', pipes = [e2]));
desc = getOwnPropertyDescriptor(e1, name);
if (!desc) {
desc = d('c', undefined);
} else {
delete desc.get;
delete desc.set;
}
desc.value = function () {
var i, emitter, data = aFrom(pipes);
emit.apply(this, arguments);
for (i = 0; (emitter = data[i]); ++i) emit.apply(emitter, arguments);
};
defineProperty(e1, name, desc);
return pipe;
};