Merge pull request #499: Contact link viewhelper

* pr-499:
  Issue #496

module/Applications/view/applications/manage/detail.phtml

@@ -475,7 +475,7 @@ endif;
                     <?php endif;?>
                     <tr>
                         <td><?php echo $this->translate('agent')?>:</td>
-                        <td><?php echo $this->link($job->getUser()->getInfo()->getDisplayName())?></td>
+                        <td><?php echo $this->contactLink($job->getUser()->getInfo())?></td>
                     </tr>
                     <?php
                     if ($job->hasMetaData('organizations:managers')): ?>

module/Core/config/module.config.php

@@ -465,6 +465,7 @@
             'salutation' => 'Core\View\Helper\Salutation',
             'period' => 'Core\View\Helper\Period',
             'link'   => 'Core\View\Helper\Link',
+            'contactLink'   => 'Core\View\Helper\ContactLink',
             'languageSwitcher' => 'Core\View\Helper\LanguageSwitcher',
             'rating' => 'Core\View\Helper\Rating',
             'base64' => 'Core\View\Helper\Base64',

module/Core/src/View/Helper/ContactLink.php

@@ -0,0 +1,77 @@
+<?php
+/**
+ * YAWIK
+ *
+ * @filesource
+ * @copyright (c) 2013 - 2016 Cross Solution (http://cross-solution.de)
+ * @license   MIT
+ */
+
+/** Core view helpers */
+namespace Core\View\Helper;
+
+use Zend\View\Helper\AbstractHelper;
+use Auth\Entity\Info;
+
+/**
+ * This helper generates HTML email link markup from a user info entity.
+ *
+ * <code>
+ *
+ *      $this->contactLink($user->getInfo());
+ *      // Outputs: <a href="mailto:[email protected]">Fancy Name</a>
+ *
+ *      $this->contactLink($user->getInfo());
+ *      // Outputs: <a href="mailto:[email protected]">[email protected]</a>
+ *
+ *      $this->contactLink($user->getInfo());
+ *      // Outputs: Fancy Name
+ * </code>
+ * 
+ */
+class ContactLink extends AbstractHelper
+{
+
+    /**
+     * generates an email link from a user info entity
+     *
+     * @param \Auth\Entity\Info $userInfo
+     * @param array $attributes
+     * @return string
+     */
+    public function __invoke(Info $userInfo, array $attributes = array())
+    {
+        $email = $userInfo->getEmail();
+        $displayName = $userInfo->getDisplayName(false);
+
+        if ($email) {
+            $label = $displayName
+                       ? $displayName
+                       : $email;
+
+            $attributesStr = $attributes
+                       ? $this->createAttributesString($attributes)
+                       : '';
+
+            return sprintf('<a %s href="mailto:%s">%s</a>', $attributesStr, $email, $label);
+        } else {
+            return $displayName
+                       ? $displayName
+                       : '';
+        }
+    }
+
+    protected function createAttributesString(array $attributes)
+    {
+        $renderer   = $this->getView();
+        $escape     = $renderer->plugin('escapehtml');
+        $escapeAttr = $renderer->plugin('escapehtmlattr');
+        $attr       = array();
+
+        foreach ($attributes as $name => $value) {
+            $attr[] = $escape($name) . (strlen($value) ? ('="' . $escapeAttr($value) . '"') : '');
+        }
+
+        return implode(' ', $attr);
+    }
+}