Validate aliases.

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;
+    }
+}