CSV Parser Library

This library allows you to define your CSV parsing in OOP style, allowing you to easily filter and test your imports. It's been in production on various large clients with multiples complex imports for quite some time now.

Main advantages are:

• OOP-style: One Parser class per import = meaningful for developers working on the project.
• Testable: A fixture csv and you can easily write tests for the import.
• Fully Customizable: each parsed result is also a PHP class where the developer can add its own logic.
• Lightly coupled: this package depends only on Symfony's Validator. Any database/persistence stuff is possible (see example below).

Installation

Install this package using composer:

composer require kaliop/csv-parser

Basic Usage

You'll need to describe the mapping between CSV columns and entity's properties. To do so, you should start by creating a Parser, but first, let's take a look at our CSV:

date;order_id;client_name;address;postal_code;country;amount
2019-04-15;678945;"Laurent Doe";"12 avenue PhpUnit";34000;France;12
2019-03-12;987564;"Ruh Doe";"15 rue du test";31001;France;50,53
2019-05-01;123456;"Julien Doe";"125 rue PHP";34440;France;69,12
2019-02-09;456123;"Gérard Doe";"15 blvd Bouchard";76000;France;789,10
2019-01-01;965478;"Jean-Luc Doe";"15 rue du test";34000;France;5,00
2019-05-01;126578;"Bernard Doe";"15 rue Symfony";75000;France;33,53
2019-05-01;216543;"Maël Doe";"Disneyland Paris";77000;France;1250,53
2019-05-01;987521;"Gros Doe";"15 rue de Behat";98520;France;50,98

our Entity looks like this:

<?php

namespace App\Entity;

class Order
{
    /**
     * @var int
     */
    public $id;

    /**
     * @var \DateTime
     */
    public $date;

    /**
     * @var string
     */
    public $clientName;

    /**
     * @var string
     */
    public $address;

    /**
     * @var int
     */
    public $postalCode;

    /**
     * @var string
     */
    public $country;

    /**
     * @var float
     */
    public $amount;
    
    /**
     * @var null|\DateTime
     */
    public $shipDate = null;
}

Creating the Parser:

<?php

namespace App\CSV;

use App\Entity\Order;
use Kaliop\CsvParser\Parser\AbstractParser;
use Kaliop\CsvParser\Parser\ParserInterface;
use Kaliop\CsvParser\ColumnHelper;

class OrderParser extends AbstractParser implements ParserInterface
{
    public function getMappingDefinition()
    {
        return [
            ColumnHelper::index('A') => [
                'property'  => 'entity.date',
                'filter'    => function($value) { return \DateTime::createFromFormat('Y-m-d', $value); }
            ],
            ColumnHelper::index('B') => [
                'property'  => 'entity.id',
                'filter'    => function($value) { return \intval($value); }
            ],
            ColumnHelper::index('C') => [
                'property'  => 'entity.clientName',
                'filter'    => function($value) { return \trim($value); }
            ],
            ColumnHelper::index('D') => [
                'property'  => 'entity.address',
                'filter'    => function($value) { return \trim($value); }
            ],
            ColumnHelper::index('E') => [
                'property'  => 'entity.postalCode',
                'filter'    => function($value) { return \intval($value); }
            ],
            ColumnHelper::index('F') => [
                'property'  => 'entity.country',
                'filter'    => function($value) { return \trim($value); }
            ],
            ColumnHelper::index('G') => [
                'property'  => 'entity.amount',
                'filter'    => function($value) { return \floatval($value); }
            ]
        ];
    }

    public function getEntityClassName()
    {
        return Order::class;
    }
}

And now do the magic! In this example we persist imported entities in database.

<?php

namespace App\Core;

use App\CSV\OrderParser;

class ImportOrdersFromCSV
{
    protected $em;
    
    public function __construct(EntityManagerInterface $em)
    {
        $this->em = $em;
    }
    
    public function import($csvFilePath)
    {
        $parser = new OrderParser($csvFilePath, ";");
        $results = $parser->execute();
        
        foreach ($results as $result) {
            if ($result->isValid()) {
                $this->em->persist($result->getEntity());
                continue;
            }
            
            // log or do something with invalid entities
        }
        
        $this->em->flush();
    }
}

Advanced Usage

You can decide to change the default ParserResult class to do you own logic once the Entity has been parsed. In the following example we will add a $shipDate which will be set by our custom result class, in the finalize() method:

<?php

namespace App\CSV;

use Kaliop\CsvParser\Result\ParserResult;
use App\Entity\Order;

class OrderParserResult extends ParserResult
{
    public function finalize()
    {
        if (!$this->entity instanceof Order || !$this->entity->date) {
            // do nothing on invalid entities
            return;
        }

        $shipDate = clone $this->entity->date;
        $shipDate->modify('+3 days');

        $this->entity->shipDate = $shipDate;
    }
}

Now just tell your Parser to use this Result class and you're ready:

<?php
// ... ImportOrdersFromCSV

$parser->setResultClassName(App\CSV\OrderParserResult::class);

Run PHPUnit Tests

./vendor/bin/phpunit