banker/lib/utils.js

Downloads transactions and balances from online banking websites using Zombie.js.

var BigNumber = require('bignumber.js'),
    events    = require('events'),
    Lazy      = require('lazy');

exports.readLines = function(stream, cb, done) {
    var data = null;

    if (typeof stream == 'string' || Buffer.isBuffer(stream)) {
        data   = stream;
        stream = new events.EventEmitter();
    }

    Lazy(stream)
        .lines
        .map(function(line) {
            line = String(line).replace(/\r$/, '');
            cb(null, line);
        })
        .join(function() {
            if (typeof done == 'function') {
                done(null);
            }
        });

    if (data) {
        stream.emit('data', data);
        stream.emit('end');
    }
};

BigNumber.prototype.toJSON = function() {
    return this.toString();
};

exports.decimal = function(num) {
    if (typeof num == 'undefined' || num === null) {
        return null;
    }
    num = num.replace(/[\s$,]/g, '');
    if (/^\(.*\)$/.test(num)) {
        // BigNumber doesn't like negative numbers formatted like (1.25)
        num = '-' + num.substring(1, num.length - 1);
    } else if (/-$/.test(num)) {
        // BigNumber doesn't like negative numbers formatted like 1.25-
        num = '-' + num.substring(0, num.length - 1);
    }
    return BigNumber(num);
};