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LabelConverter Bundle

 Introduction

This Symfony Bundle provides tools to convert an integer to a label like roman numeral, capital or lowercase letter

Label types currently supported are :

• Roman numeral : I, II, III, ...
• Capital letter : A, B, C, ...
• Lowercase letter : a, b, c, ...
• Arabic numeral : 1, 2, 3, ... (if you want to keep integers)

Tools included are :

• Form field type : Choices list which allows you to choose among label types to convert to
• Service to convert in your controllers
• Twig filter to convert integers in your templates

Installation

 Install GpatonLabelConverterBundle

Simply run assuming you have installed composer.phar or composer binary:

$ php composer.phar require gpaton/labelconverter-bundle 1.0.*

 Enable the bundle

Finally, enable the bundle in the kernel:

<?php
// app/AppKernel.php

public function registerBundles()
{
    $bundles = array(
        // ...
        new Gpaton\LabelConverterBundle\GpatonLabelConverterBundle(),

    );
}

 Usage

3 tools are provided to make your life easier, but you may not need to use all of them.

 Form field type

This tool is useful when you want to let the user choose in a form among label conversion types to use. Let's say for instance that you want the user to choose what type of label to use before answers in a quiz.

Add the form field in your Question form :

<?php
// Acme\DemoBundle\Form\QuestionType

// ...

class QuestionType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add(
            conversion',
            'gpaton_labelconverter',
            array(
                'label' => 'What kind of label to you want to use ?',
            )
        );
    }
}

You just have to get converter type choosen in your controller :

<?php
// Acme\DemoBundle\Controller\QuestionController

namespace Acme\DemoBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;
use Acme\DemoBundle\Form\QuestionType;

class QuestionController extends Controller {

    public function indexAction(Request $request) {

        $form = $this->createForm(new QuestionType());
        $form->handleRequest($request);

        if ($form->isValid()) {

            $converterType = $form->get('conversion')->getData();

        }

        // ...
    }
}

Service

To use the converter in your controller, load the service gpaton.labelconverter.factory then call the getLabel method like this :

<?php
// Acme\DemoBundle\Controller\QuestionController

namespace Acme\DemoBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;

class QuestionController extends Controller {

    public function indexAction() {

        $labelConverterFactory = $this->get('gpaton.labelconverter.factory');

        $label = $labelConverterFactory->getLabel('RomanNumeral', 3);

        // ...
    }
}

the getlabel method takes 2 arguments :

1. Converter type among the 4 currently supported :

   • RomanNumeral : I, II, III, ...
   • CapitalLetter : A, B, C, ...
   • LowercaseLetter : a, b, c, ...
   • ArabicNumeral : 1, 2, 3, ... (if you want to keep integers)
2. The integer to convert

 Twig filter

Use filter with converter type in argument :

// Acme\DemoBundle\Resources\views\Demo\index.html.twig

Question 1 : Do you lifke pancakes ?<br />
{{ 1 | tolabel('CapitalLetter') }}/ Yes<br />
{{ 2 | tolabel('CapitalLetter') }}/ No

This template will render :

Question 1 : Do you like pancakes ?
A/ Yes
B/ No

Choose converter type among the 4 currently supported :

• RomanNumeral : I, II, III, ...
• CapitalLetter : A, B, C, ...
• LowercaseLetter : a, b, c, ...
• ArabicNumeral : 1, 2, 3, ... (if you want to keep integers)

 Additonnal notes

 Letter conversion after 26

When you try to convert an integer greater than 26 to a capital or lowercase letter, the bundle use the system used by Excel with its columns names :

• 26 -> Z
• 27 -> AA
• 28 -> AB
• 29 -> AC
• ...

Integers supported

Only integers strictly greater than 0 are supported. Other numbers will throw a LabelConverterException you may catch.

 Invalid converter type

If you try to convert an integer by using a non existent converter type, a LabelConverterException will be thrown.

License

This bundle is under GPL v2 license. See the complete license in the bundle:

Resources/meta/LICENSE