invoice-fs/lib/invoice.js

Nostalgic command-line invoicing application producing plain text invoices and JSON data structures. Uses the file system as a database

var Api = require('invoice-api'),
    obj = require('javascript-object-paraphernalia'),
    state = require('./state'),
    paths = state.get('paths'),
    invoiceNumberGenerator = require('./invoiceNumberGenerator'),
    issuer = require('./issuer'),
    Customer = require('./customer'),
    fs = require('fs'),
    out = require('./out'),
    writeDataSync = require('./writeDataSync');

try { fs.lstatSync(paths.invoices); } catch (e) { fs.mkdirSync(paths.invoices); }
try { fs.lstatSync(paths.finished); } catch (e) { fs.mkdirSync(paths.finished); }

function Invoice(number) {
    if (number !== undefined) {
        this.open(number);
    }
}

Invoice.prototype.paid = function(callback) {
    this.data.status = "PAID";
    writeDataSync(paths.invoices + this.data.number.toUpperCase() + ".json", this.data, callback);
};

Invoice.prototype.lock = function(callback) {
    this.save(true, callback);
};

Invoice.prototype.unlock = function(callback) {
    this.save(false, callback);
};

Invoice.prototype.new = function(customer) {
    if (customer === undefined) {
        throw new Error("A new invoice must be provided a customer");
    }

    var invoiceNumber = invoiceNumberGenerator.getInvoiceNumber();

    try {
        this.data = new Api.Invoice(JSON.parse(fs.readFileSync(paths.invoices + invoiceNumber.toUpperCase() + '.json', 'utf8')));
    } catch (e) {
        this.data = new Api.Invoice({
            number: invoiceNumber,
            issuer: issuer.data,
            customer: new Customer(customer).data
        });
        state.set('invoice', invoiceNumber.toUpperCase());
        this.save();
        return;
    }

    throw new Error("Invoice already exists");
};

Invoice.prototype.open = function(number) {
    this.data = new Api.Invoice(JSON.parse(fs.readFileSync(paths.invoices + number.toUpperCase() + '.json', 'utf8')));
    state.set('invoice', number.toUpperCase());
};

Invoice.prototype.save = function(lock, callback) {
    lock ? this.data.lock() : this.data.unlock();
    writeDataSync(paths.invoices + this.data.number.toUpperCase() + ".json", this.data, callback);
};

Invoice.prototype.add = function(item) {
    if (this.data.status !== "LOCKED") {
        this.data.add(new Api.InvoiceItem(item));
    }
};

module.exports = Invoice;