Added data providers for choice fields.

Author: fernando.carletti

DataProvider.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace Linio\DynamicFormBundle;
+
+
+interface DataProvider
+{
+    /**
+     * Retrieve data for collection fields.
+     *
+     * @return array
+     */
+    public function getData();
+}

DependencyInjection/CompilerPass.php

@@ -12,6 +12,16 @@ class CompilerPass implements CompilerPassInterface
      * @param ContainerBuilder $container
      */
     public function process(ContainerBuilder $container)
+    {
+        $this->loadFormlyFields($container);
+        $this->loadDataProviders($container);
+
+    }
+
+    /**
+     * @param ContainerBuilder $container
+     */
+    public function loadFormlyFields(ContainerBuilder $container)
     {
         if (!$container->hasDefinition('container.formly_field')) {
             return;
@@ -26,4 +36,19 @@ public function process(ContainerBuilder $container)
             }
         }
     }
+
+    /**
+     * @param ContainerBuilder $container
+     */
+    public function loadDataProviders(ContainerBuilder $container)
+    {
+        $containerDefinition = $container->getDefinition('dynamic_form.factory');
+        $taggedServices = $container->findTaggedServiceIds('dynamic_form.data_provider');
+
+        foreach ($taggedServices as $id => $tags) {
+            foreach ($tags as $attributes) {
+                $containerDefinition->addMethodCall('addDataProvider', [$attributes['alias'], new Reference($id)]);
+            }
+        }
+    }
 }

DependencyInjection/Configuration.php

@@ -4,6 +4,7 @@
 
 use Symfony\Component\Config\Definition\Builder\TreeBuilder;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
+use Linio\DynamicFormBundle\DataProvider;
 
 /**
  * This is the class that validates and merges configuration from your app/config files
@@ -30,6 +31,7 @@ public function getConfigTreeBuilder()
                         ->booleanNode('enabled')
                             ->defaultFalse()
                         ->end()
+
                         ->scalarNode('type')
                             ->isRequired()
                         ->end()
@@ -42,6 +44,9 @@ public function getConfigTreeBuilder()
 
                         ->variableNode('validation')
                         ->end()
+
+                        ->scalarNode('data_provider')
+                        ->end()
                     ->end()
                 ->end()
             ->end()

Exception/NotExistentDataProviderException.php

@@ -0,0 +1,7 @@
+<?php
+
+namespace Linio\DynamicFormBundle\Exception;
+
+class NotExistentDataProviderException extends DynamicFormException
+{
+}

Form/FormFactory.php

@@ -2,6 +2,7 @@
 
 namespace Linio\DynamicFormBundle\Form;
 
+use Linio\DynamicFormBundle\DataProvider;
 use Linio\DynamicFormBundle\Exception\NonExistentFormException;
 use Symfony\Component\Form\FormBuilderInterface;
 use Symfony\Component\Form\FormFactory as SymfonyFormFactory;
@@ -19,6 +20,11 @@ class FormFactory
      */
     protected $configuration;
 
+    /**
+     * @var DataProvider[]
+     */
+    protected $dataProviders = [];
+
     /**
      * @param SymfonyFormFactory $formFactory
      */
@@ -35,6 +41,15 @@ public function setConfiguration(array $configuration)
         $this->configuration = $configuration;
     }
 
+    /**
+     * @param string       $alias
+     * @param DataProvider $dataProvider
+     */
+    public function addDataProvider($alias, DataProvider $dataProvider)
+    {
+        $this->dataProviders[$alias] = $dataProvider;
+    }
+
     /**
      * @param string $key     The key of the Form in the form configuration
      * @param array  $data
@@ -75,6 +90,10 @@ public function createBuilder($key, $data = [], $options = [], $name = null)
 
             $fieldOptions = isset($fieldConfiguration['options']) ? $fieldConfiguration['options'] : [];
 
+            if (isset($fieldConfiguration['data_provider'])) {
+                $fieldOptions['choices'] = $this->loadDataProvider($fieldConfiguration['data_provider'])->getData();
+            }
+
             if (isset($fieldConfiguration['validation'])) {
                 $constraints = [];
 
@@ -106,6 +125,20 @@ public function createBuilder($key, $data = [], $options = [], $name = null)
         return $formBuilder;
     }
 
+    /**
+     * @param string $alias
+     *
+     * @return DataProvider
+     */
+    public function loadDataProvider($alias)
+    {
+        if (!isset($this->dataProviders[$alias])) {
+            throw new NotExistentDataProviderException();
+        }
+
+        return $this->dataProviders[$alias];
+    }
+
     /**
      * @param string $name
      *