Ongoing development.

src/GeocodeWidget.php

@@ -0,0 +1,102 @@
+<?php
+
+/**
+ * @package    netzmacht
+ * @author     David Molineus <david.molineus@netzmacht.de>
+ * @copyright  2017 netzmacht David Molineus. All rights reserved.
+ * @filesource
+ *
+ */
+
+namespace Netzmacht\Contao\Leaflet\GeocodeWidget;
+
+/**
+ * Class GeocodeWidget
+ *
+ * @package Netzmacht\Contao\Leaflet\GeocodeWidget
+ */
+class GeocodeWidget extends \Widget
+{
+    /**
+     * Submit user input.
+     *
+     * @var boolean
+     */
+    protected $blnSubmitInput = true;
+
+    /**
+     * Add a for attribute.
+     *
+     * @var boolean
+     */
+    protected $blnForAttribute = true;
+
+    /**
+     * Template.
+     *
+     * @var string
+     */
+    protected $strTemplate = 'be_widget';
+
+    /**
+     * Template name.
+     *
+     * @var string
+     */
+    protected $widgetTemplate = 'be_widget_leaflet_geocode';
+
+    /**
+     * Validate the input.
+     *
+     * @param mixed $value Given value.
+     *
+     * @return mixed
+     */
+    protected function validator($value)
+    {
+        $value = parent::validator($value);
+
+        if (!$value) {
+            return $value;
+        }
+
+        if (
+            // See: http://stackoverflow.com/a/18690202
+            !preg_match(
+                '^[-+]?([1-8]?\d(\.\d+)?|90(\.0+)?),[-+]?(180(\.0+)?|((1[0-7]\d)|([1-9]?\d))(\.\d+)?)(,[-+]?\d+)?$',
+                $value
+            )
+        ) {
+            $this->addError(
+                sprintf(
+                    $GLOBALS['TL_LANG']['ERR']['leaflet_invalid_coordinate'],
+                    $value
+                )
+            );
+        }
+
+        return $value;
+    }
+
+    /**
+     * Generate the widget.
+     *
+     * @return string
+     */
+    public function generate()
+    {
+        $template = new \BackendTemplate($this->widgetTemplate);
+        $template->setData(
+            [
+                'widget'     => $this,
+                'value'      => specialchars($this->value),
+                'class'      => $this->strClass ? ' ' . $this->strClass : '',
+                'id'         => $this->strId,
+                'attributes' => $this->getAttributes(),
+                'wizard'     => $this->wizard,
+            ]
+        );
+
+        return $template->parse();
+    }
+}