Validate aliases.

module/config/services.php

@@ -17,6 +17,7 @@ use Netzmacht\Contao\Leaflet\Dca\ControlCallbacks;
 use Netzmacht\Contao\Leaflet\Dca\FrontendIntegration;
 use Netzmacht\Contao\Leaflet\Dca\LayerCallbacks;
 use Netzmacht\Contao\Leaflet\Dca\MapCallbacks;
+use Netzmacht\Contao\Leaflet\Dca\Validator;
 use Netzmacht\Contao\Leaflet\DependencyInjection\LeafletServices;
 use Netzmacht\Contao\Leaflet\Frontend\MapElement;
 use Netzmacht\Contao\Leaflet\Frontend\MapModule;
@@ -226,6 +227,19 @@ $container['leaflet.dca.frontend-integration'] = $container->share(
     }
 );
 
+/**
+ * Validator helper class.
+ *
+ * @return Validator
+ */
+$container['leaflet.dca.validator'] = $container->share(
+    function ($container) {
+        return new Validator(
+            $container[Services::TRANSLATOR]
+        );
+    }
+);
+
 /**
  * Component factory for content element.
  *

module/dca/tl_leaflet_control.php

@@ -169,6 +169,7 @@ $GLOBALS['TL_DCA']['tl_leaflet_control'] = array
                     ['title'],
                     \Netzmacht\Contao\Leaflet\DependencyInjection\LeafletServices::ALIAS_GENERATOR
                 ),
+                \Netzmacht\Contao\Leaflet\Dca\Validator::callback('validateAlias'),
             ),
             'eval'          => array('mandatory' => false, 'maxlength' => 255, 'tl_class' => 'w50', 'unique' => true),
             'sql'           => "varchar(255) NOT NULL default ''"

module/dca/tl_leaflet_icon.php

@@ -180,6 +180,7 @@ $GLOBALS['TL_DCA']['tl_leaflet_icon'] = array
                     ['title'],
                     \Netzmacht\Contao\Leaflet\DependencyInjection\LeafletServices::ALIAS_GENERATOR
                 ),
+                \Netzmacht\Contao\Leaflet\Dca\Validator::callback('validateAlias'),
             ),
             'eval'          => array('mandatory' => false, 'maxlength' => 255, 'tl_class' => 'w50', 'unique' => true),
             'sql'           => "varchar(255) NOT NULL default ''"

module/dca/tl_leaflet_layer.php

@@ -267,6 +267,7 @@ $GLOBALS['TL_DCA']['tl_leaflet_layer'] = array
                     ['title'],
                     \Netzmacht\Contao\Leaflet\DependencyInjection\LeafletServices::ALIAS_GENERATOR
                 ),
+                \Netzmacht\Contao\Leaflet\Dca\Validator::callback('validateAlias'),
             ),
             'eval'          => array('mandatory' => false, 'maxlength' => 255, 'tl_class' => 'w50', 'unique' => true),
             'sql'           => "varchar(255) NOT NULL default ''"

module/dca/tl_leaflet_map.php

@@ -169,6 +169,7 @@ $GLOBALS['TL_DCA']['tl_leaflet_map'] = array
                     ['title'],
                     \Netzmacht\Contao\Leaflet\DependencyInjection\LeafletServices::ALIAS_GENERATOR
                 ),
+                \Netzmacht\Contao\Leaflet\Dca\Validator::callback('validateAlias')
             ),
             'eval'      => array('mandatory' => false, 'maxlength' => 255, 'tl_class' => 'w50', 'unique' => true),
             'sql'       => "varchar(255) NOT NULL default ''"

module/dca/tl_leaflet_marker.php

@@ -178,6 +178,7 @@ $GLOBALS['TL_DCA']['tl_leaflet_marker'] = array
                     ['title'],
                     \Netzmacht\Contao\Leaflet\DependencyInjection\LeafletServices::ALIAS_GENERATOR
                 ),
+                \Netzmacht\Contao\Leaflet\Dca\Validator::callback('validateAlias'),
             ),
             'eval'          => array('mandatory' => false, 'maxlength' => 255, 'tl_class' => 'w50', 'unique' => true),
             'sql'           => "varchar(255) NOT NULL default ''"

module/dca/tl_leaflet_popup.php

@@ -166,6 +166,7 @@ $GLOBALS['TL_DCA']['tl_leaflet_popup'] = array
                     ['title'],
                     \Netzmacht\Contao\Leaflet\DependencyInjection\LeafletServices::ALIAS_GENERATOR
                 ),
+                \Netzmacht\Contao\Leaflet\Dca\Validator::callback('validateAlias'),
             ),
             'eval'          => array('mandatory' => false, 'maxlength' => 255, 'tl_class' => 'w50', 'unique' => true),
             'sql'           => "varchar(255) NOT NULL default ''"

module/dca/tl_leaflet_style.php

@@ -159,6 +159,7 @@ $GLOBALS['TL_DCA']['tl_leaflet_style'] = array
                     ['title'],
                     \Netzmacht\Contao\Leaflet\DependencyInjection\LeafletServices::ALIAS_GENERATOR
                 ),
+                \Netzmacht\Contao\Leaflet\Dca\Validator::callback('validateAlias'),
             ),
             'eval'          => array('mandatory' => false, 'maxlength' => 255, 'tl_class' => 'w50', 'unique' => true),
             'sql'           => "varchar(255) NOT NULL default ''"

module/dca/tl_leaflet_vector.php

@@ -204,6 +204,7 @@ $GLOBALS['TL_DCA']['tl_leaflet_vector'] = array
                     ['title'],
                     \Netzmacht\Contao\Leaflet\DependencyInjection\LeafletServices::ALIAS_GENERATOR
                 ),
+                \Netzmacht\Contao\Leaflet\Dca\Validator::callback('validateAlias'),
             ),
             'eval'          => array('mandatory' => false, 'maxlength' => 255, 'tl_class' => 'w50', 'unique' => true),
             'sql'           => "varchar(255) NOT NULL default ''"

module/languages/en/leaflet.php

@@ -45,3 +45,5 @@ $GLOBALS['TL_LANG']['leaflet_vector']['rectangle'][1]  = 'Rectangle overlay. For
 
 $GLOBALS['TL_LANG']['leaflet']['searchPosition'] = 'Search location';
 $GLOBALS['TL_LANG']['leaflet']['applyPosition']  = 'Apply position';
+
+$GLOBALS['TL_LANG']['leaflet']['invalidAlias'] = 'Invalid alias given. Alias may not be empty, begin with a numeric value nor contain any special chars (underscore allowed).';

src/Netzmacht/Contao/Leaflet/Dca/Validator.php

@@ -0,0 +1,115 @@
+<?php
+
+/**
+ * @package    netzmacht
+ * @author     David Molineus <david.molineus@netzmacht.de>
+ * @copyright  2016 netzmacht David Molineus. All rights reserved.
+ * @filesource
+ *
+ */
+
+namespace Netzmacht\Contao\Leaflet\Dca;
+
+use ContaoCommunityAlliance\Translator\TranslatorInterface as Translator;
+use Netzmacht\Contao\Toolkit\Dca\Callback\CallbackFactory;
+use Netzmacht\LeafletPHP\Value\LatLng;
+
+/**
+ * Class Validator.
+ *
+ * @package Netzmacht\Contao\Leaflet\Dca
+ */
+class Validator
+{
+    /**
+     * Translator.
+     *
+     * @var Translator;
+     */
+    private $translator;
+
+    /**
+     * Validator constructor.
+     *
+     * @param Translator $translator Translator.
+     */
+    public function __construct(Translator $translator)
+    {
+        $this->translator = $translator;
+    }
+
+    /**
+     * Generate the callback definition.
+     *
+     * @param string $methodName Callback method name.
+     *
+     * @return callable
+     */
+    public static function callback($methodName)
+    {
+        return CallbackFactory::service('leaflet.dca.validator', $methodName);
+    }
+
+    /**
+     * Validate coordinates.
+     *
+     * @param mixed $value Given value.
+     *
+     * @return mixed
+     */
+    public function validateCoordinates($value)
+    {
+        try {
+            LatLng::fromString($value);
+        } catch (\Exception $e) {
+            throw new \InvalidArgumentException(
+                $this->translator->translate('invalidCoordinates', 'leaflet', [$value]),
+                0,
+                $e
+            );
+        }
+
+        return $value;
+    }
+
+    /**
+     * Validate multiple coordinates.
+     *
+     * @param mixed $values Given value.
+     *
+     * @return mixed
+     */
+    public function validateMultipleCoordinates($values)
+    {
+        if (!is_array($values)) {
+            $lines = explode("\n", $values);
+        } else {
+            $lines = $values;
+        }
+
+        foreach ($lines as $coordinate) {
+            LatLng::fromString($coordinate);
+        }
+
+        return $values;
+    }
+
+    /**
+     * Validate an alias.
+     *
+     * @param string $value Given value
+     *
+     * @return string
+     * @throws \InvalidArgumentException When invalid value given.
+     */
+    public function validateAlias($value)
+    {
+        if (preg_match('/[A-Za-z_][A-Za-z0-9_]+/', $value) !== 1) {
+            throw new \InvalidArgumentException(
+                $this->translator->translate('invalidAlias', 'leaflet')
+            );
+        }
+
+        return $value;
+    }
+}