monitoring: Add Link view helper

Most of the monitoring overviews link to detail information, e.g. the full information of the involved monitored
object. Instead of reintroducing link generation and translation in those views, this helper contains most
frequently used jump links.

modules/monitoring/application/views/helpers/Link.php

@@ -0,0 +1,59 @@
+<?php
+
+/**
+ * Helper for generating frequently used jump links
+ *
+ * Most of the monitoring overviews link to detail information, e.g. the full information of the involved monitored
+ * object. Instead of reintroducing link generation and translation in those views, this helper contains most
+ * frequently used jump links.
+ */
+class Zend_View_Helper_Link extends Zend_View_Helper_Abstract
+{
+    /**
+     * Helper entry point
+     *
+     * @return $this
+     */
+    public function link()
+    {
+        return $this;
+    }
+
+    /**
+     * Create a host link
+     *
+     * @param   string  $host       Hostname
+     * @param   string  $linkText   Link text, e.g. the host's display name
+     *
+     * @return  string
+     */
+    public function host($host, $linkText)
+    {
+        return $this->view->qlink(
+            $linkText,
+            $this->view->href('monitoring/host/show', array('host' => $host))
+        );
+    }
+
+    /**
+     * Create a service link
+     *
+     * @param   string  $service            Service name
+     * @param   string  $serviceLinkText    Text for the service link, e.g. the service's display name
+     * @param   string  $host               Hostname
+     * @param   string  $hostLinkText       Text for the host link, e.g. the host's display name
+     *
+     * @return  string
+     */
+    public function service($service, $serviceLinkText, $host, $hostLinkText)
+    {
+        return sprintf(
+            $this->view->translate('%s on %s', 'Service running on host'),
+            $this->view->qlink(
+                $serviceLinkText,
+                $this->view->href('monitoring/service/show', array('host' => $host, 'service' => $service))
+            ),
+            $this->host($host, $hostLinkText)
+        );
+    }
+}