init

Controller/FrontController.php

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+<?php
+
+namespace KarolNet\RatingFilterBundle\Controller;
+
+use Symfony\Bundle\FrameworkBundle\Controller\Controller;
+use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
+use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
+
+class FrontController extends Controller
+{
+    /**
+     * @Route("/", name="home")
+     * @Template()
+     */
+    public function indexAction()
+    {
+        return [];
+    }
+}

DependencyInjection/Configuration.php

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+<?php
+
+namespace KarolNet\RatingFilterBundle\DependencyInjection;
+
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+use Symfony\Component\Config\Definition\ConfigurationInterface;
+
+/**
+ * This is the class that validates and merges configuration from your app/config files
+ *
+ * To learn more see {@link http://symfony.com/doc/current/cookbook/bundles/extension.html#cookbook-bundles-extension-config-class}
+ */
+class Configuration implements ConfigurationInterface
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function getConfigTreeBuilder()
+    {
+        $treeBuilder = new TreeBuilder();
+        $rootNode = $treeBuilder->root('rating_filter');
+
+        $rootNode
+            ->children()
+                ->integerNode('max_rating')
+                    ->defaultValue(5)
+                ->end()
+                ->scalarNode('star_full_template')
+                    ->defaultValue('<i class="fa fa-star fa-2xx" style="color: #f6d20b"></i>')
+                ->end()
+                ->scalarNode('set_star_half_empty_template')
+                    ->defaultValue('<i class="fa fa-star-half-o fa-2xx" style="color: #f6d20b "></i>')
+                ->end()
+                ->scalarNode('set_star_empty')
+                   ->defaultValue('<i class="fa fa-star fa-2xx" style="color: #FFFF80"></i>')
+                ->end()
+            ->end()
+        ;
+
+        return $treeBuilder;
+    }
+}

DependencyInjection/RatingFilterExtension.php

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+<?php
+
+namespace KarolNet\RatingFilterBundle\DependencyInjection;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\HttpKernel\DependencyInjection\Extension;
+use Symfony\Component\DependencyInjection\Loader;
+
+/**
+ * This is the class that loads and manages your bundle configuration
+ *
+ * To learn more see {@link http://symfony.com/doc/current/cookbook/bundles/extension.html}
+ */
+class RatingFilterExtension extends Extension
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function load(array $configs, ContainerBuilder $container)
+    {
+        $configuration = new Configuration();
+        $config = $this->processConfiguration($configuration, $configs);
+
+        $loader = new Loader\YamlFileLoader($container, new FileLocator(__DIR__.'/../Resources/config'));
+        $loader->load('services.yml');
+        $container->setParameter('rating_filter', $config);
+    }
+}

README.md

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+Description
+--------
+
+Karolnet RatingFilter is simple twig filter to generate stars rating from number
+
+Installation
+------------
+
+composer require karolnet/rating-filter
+
+add bundle to AppKernel
+
+configure if you want

RatingFilterBundle.php

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+<?php
+
+namespace KarolNet\RatingFilterBundle;
+
+use Symfony\Component\HttpKernel\Bundle\Bundle;
+
+class RatingFilterBundle extends Bundle
+{
+}

Resources/config/routing.yml

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+rating_filter_homepage:
+    path:     /hello/{name}
+    defaults: { _controller: RatingFilterBundle:Default:index }

Resources/config/services.yml

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+parameters:
+    max_rating: 10;
+    star_full_template: '<i class="fa fa-star fa-2xx" style="color: #f6d20b"></i>'
+    set_star_half_empty_template: '<i class="fa fa-star-half-o fa-2xx" style="color: #f6d20b "></i>'
+    set_star_empty: '<i class="fa fa-star fa-2xx" style="color: #FFFF80"></i>'
+
+services:
+    karol_net.twig_extension.rating:
+        class: KarolNet\RatingFilterBundle\Twig\RatingExtension
+        public: false
+        arguments:
+            - "%rating_filter%"
+        tags:
+            - { name: twig.extension }

Resources/translations/messages.fr.xlf

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+<?xml version="1.0"?>
+<xliff version="1.2" xmlns="urn:oasis:names:tc:xliff:document:1.2">
+    <file source-language="en" datatype="plaintext" original="file.ext">
+        <body>
+            <trans-unit id="1">
+                <source>Symfony2 is great</source>
+                <target>J'aime Symfony2</target>
+            </trans-unit>
+        </body>
+    </file>
+</xliff>

Resources/views/Front/index.html.twig

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+{% extends '::base.html.twig' %}
+
+{% block body %}
+    {{ 2 | rating }}
+{% endblock %}

Resources/views/Rating/starEmpty.html.twig

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+<i class="fa fa-star fa-2xx" style="color: #FFFF80"></i>

Resources/views/Rating/starFull.html.twig

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+<i class="fa fa-star fa-2xx" style="color: #f6d20b"></i>

Resources/views/Rating/starHalfEmpty.html.twig

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+<i class="fa fa-star-half-o fa-2xx" style="color: #f6d20b "></i>

Twig/RatingExtension.php

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+<?php
+
+namespace KarolNet\RatingFilterBundle\Twig;
+
+class RatingExtension extends \Twig_Extension
+{
+    /** @var  string */
+    private $starFull;
+    /** @var  string */
+    private $starHalfEmpty;
+    /** @var  string */
+    private $starEmpty;
+    /** @var  int */
+    private $maxRate;
+
+    public function __construct($configuration)
+    {
+        $this->maxRate = $configuration['max_rating'];
+        $this->starFull = $configuration['star_full_template'];
+        $this->starHalfEmpty = $configuration['set_star_half_empty_template'];
+        $this->starEmpty = $configuration['set_star_empty'];
+    }
+
+    public function getFilters()
+    {
+        return [
+            new \Twig_SimpleFilter(
+                'rating',
+                [$this, 'showRating'],
+                ['is_safe' => ['html']]
+            ),
+        ];
+    }
+
+    public function showRating($rating)
+    {
+        $output = '';
+
+        for($count = 0; $count < $this->maxRate; $count++) {
+
+            if ($rating <  $count) {
+                $output = $output . $this->starEmpty;
+            } elseif($rating ==  $count) {
+                $output = $output . $this->starHalfEmpty;
+            }else {
+                $output = $output . $this->starFull;
+            }
+        }
+
+        return $output;
+    }
+
+    /**
+     * @return string
+     */
+    public function getName()
+    {
+        return 'rating_extension';
+    }
+}