jingtum-lib/src/account.js

jingtum lib

/**
 * Created by Administrator on 2016/11/21.
 */
var util = require('util');
var Event = require('events').EventEmitter;
var utils = require('./utils');

/**
 * account stub for subscribe accounts transaction event
 * can be used for many accounts
 * @param remote
 * @constructor
 */
function Account(remote) {
    Event.call(this);

    var self = this;
    self.setMaxListeners(0);
    self._remote = remote;
    self._accounts = {};

    self.on('newListener', function(account, listener) {
        if (account === 'removeListener') return;
        if (!utils.isValidAddress(account)) {
            self.account = new Error("invalid account");
            return self;
        }
        self._accounts[account] = listener;
    });
    self.on('removeListener', function(account) {
        if (!utils.isValidAddress(account)) {
            self.account = new Error("invalid account");
            return self;
        }
        delete self._accounts[account];
    });
    // subscribe all transactions, so just dispatch event by account
    self._remote.on('transactions', self.__infoAffectedAccounts.bind(self));
}
util.inherits(Account, Event);

Account.prototype.__infoAffectedAccounts = function(data) {
    var self = this;
    // dispatch
    var accounts = utils.affectedAccounts(data);

    for (var i in accounts) {
        var callback = self._accounts[accounts[i]];
        var _tx = utils.processTx(data, accounts[i]);
        if (callback) callback(_tx);
    }
};

module.exports = Account;