Update instructions

README.md

@@ -1,19 +1,114 @@
 [![Codacy Badge](https://api.codacy.com/project/badge/Grade/2fa8c0203a5b40e4b728c355b20de99e)](https://www.codacy.com/app/pabloveintimilla/facturaec?utm_source=github.com&utm_medium=referral&utm_content=pabloveintimilla/facturaec&utm_campaign=Badge_Grade)
+[![Coding Standards](https://img.shields.io/badge/cs-PSR--2--R-yellow.svg)](https://github.com/php-fig-rectified/fig-rectified-standards)
 
 # FacturaEC
 
+> Project in development process.
+
+## Introduction
+
+> This is a PHP Library to handle electronic invoice of Ecuador (SRI), support: Invoices (facturas). Include operations to import from xml, read an transform (xml, json, cvs) data. This not implement user interface, this shoul be used as a library.
+
+## Installation
+
+> composer require pabloveintimilla/facturaec
+
+## Use
+
+### Bootstrap. 
+
+This should be include to autoload classes
+
+```php
+<?php
+use Doctrine\Common\Annotations\AnnotationRegistry;
+
+$autoloader = require dirname(__DIR__).'/vendor/autoload.php';
+AnnotationRegistry::registerLoader([$autoloader, 'loadClass']);
+```
+
+### Read a xml file
+
+Get data from a xml file
+
+```php
+use PabloVeintimilla\FacturaEC\Model\Invoice;
+use PabloVeintimilla\FacturaEC\Reader\XML;
+use PabloVeintimilla\FacturaEC\Reader\Adapter;
+use PabloVeintimilla\FacturaEC\Reader\Loader;
+
+$invoice = (new Reader(Invoice::class))
+    ->loadFromFile('PATH TO FILE')
+    ->read();
+
+// Get data
+$invoice->getDate();
 ```
-Project in development.
+
+### Read miltiple files from directory
+
+Automatic detect xml files from directory
+
+```php
+use PabloVeintimilla\FacturaEC\Model\Collection\VoucherCollection;
+
+$loader = (new Loader())
+    ->loadXMLFromDirectory('PATH TO DIRECTORY');
+
+$invoices = new VoucherCollection();
+foreach ($loader as $data){
+    $adapter = new Adapter($data);
+    $type = ucfirst(strtolower($adapter->getVoucherType()));
+    $class = "PabloVeintimilla\FacturaEC\Model\\".$type;
+
+    $invoice = (new XML($adapter->tranformIn(), $class))
+        ->read();
+
+    $invoices->add($invoice);
+}
 ```
 
-## Introduction
+### Export
 
-> This is a PHP Library to handle electronic invoice of Ecuador (SRI), support: Facturas, Notas de débito, Notas de crédito, Retenciones, Guias de remisión. Include operations to write, read an transform (xml, pdf, json, cvs) data. This not implement user interface, this shoul be used as a library.
+Export data to csv fie
 
-## Code Samples
+```php
+use PabloVeintimilla\FacturaEC\Writer\Csv;
 
-> $factura = new Factura()
+$csv = new Csv($invoices);
+$csv->write($directory. DIRECTORY_SEPARATOR . 'FILE NAME');
+```
 
-## Installation
+### Create a invoice object
 
-> composer require pabloveintimilla/facturaec
+Create object with fluent methods.
+
+```php
+use PabloVeintimilla\FacturaEC\Model\InvoiceDetail;
+use PabloVeintimilla\FacturaEC\Model\Seller;
+
+$invoice = (new Invoice())
+    ->setStore('001')
+    ->setPoint('002')
+    ->setSequential('0000000003')
+    ->setVoucherType('01')
+    ->setEnviromentType('1')
+    ->setEmissionType('1');
+
+$seller = (new Seller())
+    ->setCompany('Pablo Veintimilla')
+    ->setName('Clouder 7')
+    ->setIdentification('1719415677')
+    ->setAddress('Quito');
+$invoice->setSeller($seller);
+
+for ($i = 1; $i <= 3; $i++) {
+    $detail = (new InvoiceDetail($invoice))
+        ->setDescription("Producto $i")
+        ->setQuantity($i)
+        ->setUnitPrice($i * 10)
+        ->setTotal(($i * 10) * $i);
+
+    $invoice->addDetail($detail);
+}
+```