Challenges and solutions for handling CNAB files: Application of jrodella/cnab-layouts-parser library

In daily development, we often need to deal with bank reconciliation documents, especially when it comes to payments and financial management. CNAB (Centro Nacional de Automação Bancária) is a standard bank file format used to batch process bank transaction data. However, parsing and generating files in this format is a complex task involving multiple banks and different file formats.

In my project, I need to generate and parse files in CNAB240 format, which is a whole new challenge for me. I tried writing code manually to parse these files, but quickly found that this approach was not only time consuming, but also error prone. Every time there is a new bank format or rule change, I need to readjust the code, which is obviously not a sustainable solution.

Finally, I found the jrodella/cnab-layouts-parser library, which is a branch of glauberportella/cnab-layouts-parser. Installing this library through Composer is very simple, just execute the following command:

 <code>composer require jrodella/cnab-layouts-parser</code>

This library provides powerful capabilities to easily generate and parse CNAB files. Here is an example of how to use this library to generate a Remessa file in CNAB240 format:

 <code class="php"><?php require_once __DIR__.'/vendor/autoload.php';

use CnabParser\Parser\Layout;
use CnabParser\Model\Remessa;
use CnabParser\Output\RemessaFile;

$remessaLayout = new Layout('itau','cnab240','cobranca');
$remessa = new Remessa($remessaLayout);

// header arquivo
$remessa-> header->codigo_banco = 341; $remessa->header->tipo_inscricao = 2; $remessa->header->inscricao_numero = '12234567000186'; $remessa->header->agencia = 2932; $remessa->header->conta = 24992; $remessa->header->dac = 9; $remessa->header->nome_empresa = 'NOME DA EMPRESA'; $remessa->header->data_geracao = date('dmY'); $remessa->header->hora_geracao = date('His'); $remessa->header->numero_sequencial_arquivo_retorno = 1; // criar um novo lote de serviço para a remessa $lote = $remessa->novoLote(1); // ... 其他代码... // gera arquivo $remessaFile = new RemessaFile($remessa); $remessaFile->generate(__DIR__.'/tests/out/itaucobranca240.rem');</code>

Similarly, parsing the returned CNAB file is also very simple:

 <code class="php"><?php require_once __DIR__.'/vendor/autoload.php';

use CnabParser\Parser\Layout;
use CnabParser\Model\Retorno;
use CnabParser\Input\RetornoFile;

$layout = new Layout('itau','cnab240','cobranca');
$retornoFile = new RetornoFile($layout, __DIR__.'/data/cobranca-itau-cnab240.ret');

// Gera o objeto instancia de CnabParser\Model\Retorno com os dados do arquivo de retorno processado
$retorno = $retornoFile-> generate(); // ... utilize o $retorno em seu sistema para verificações, etc. ...</code>

Using the jrodella/cnab-layouts-parser library, I was able to quickly generate and parse CNAB files without worrying about complex formats and rules. It supports multiple banks and different file formats, allowing my project to more flexibly respond to various bank reconciliation needs.

This library not only improves my work efficiency, but also reduces the occurrence of errors. By using Composer for dependency management, I can easily update the library to the latest version, ensuring my code is always up to date. Overall, the jrodella/cnab-layouts-parser library is a powerful tool for handling CNAB files, greatly simplifying my workflow.

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