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'use strict';
var Functor = require('./functor'),
Pledge = require('./pledge');
var Cell = function(tuple) {
this._ext = tuple[0];
this._session = tuple[1];
this._functors = {
incoming: new Functor(this._session, 'processIncomingMessage'),
outgoing: new Functor(this._session, 'processOutgoingMessage')
};
};
Cell.prototype.pending = function(direction) {
var functor = this._functors[direction];
if (!functor._stopped) functor.pending += 1;
};
Cell.prototype.incoming = function(error, message, callback, context) {
this._exec('incoming', error, message, callback, context);
};
Cell.prototype.outgoing = function(error, message, callback, context) {
this._exec('outgoing', error, message, callback, context);
};
Cell.prototype.close = function() {
this._closed = this._closed || new Pledge();
this._doClose();
return this._closed;
};
Cell.prototype._exec = function(direction, error, message, callback, context) {
this._functors[direction].call(error, message, function(err, msg) {
if (err) err.message = this._ext.name + ': ' + err.message;
callback.call(context, err, msg);
this._doClose();
}, this);
};
Cell.prototype._doClose = function() {
var fin = this._functors.incoming,
fout = this._functors.outgoing;
if (!this._closed || fin.pending + fout.pending !== 0) return;
if (this._session) this._session.close();
this._session = null;
this._closed.done();
};
module.exports = Cell;