Add uptime to server details page

Author: carlbennett

src/controllers/Server/View.php

@@ -9,6 +9,7 @@
 use \BNETDocs\Libraries\Packet;
 use \BNETDocs\Libraries\Router;
 use \BNETDocs\Libraries\Server;
+use \BNETDocs\Libraries\ServerMetric;
 use \BNETDocs\Libraries\ServerType;
 use \BNETDocs\Libraries\UserSession;
 use \BNETDocs\Models\Server\View as ServerViewModel;
@@ -48,6 +49,10 @@ public function run(Router &$router) {
       $model->server_type = null;
     }
 
+    if ($model->server) {
+      $model->server_uptime = ServerMetric::getUptime($this->server_id);
+    }
+
     ob_start();
     $view->render($model);
     $router->setResponseCode(($model->server ? 200 : 404));

src/libraries/ServerMetric.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace BNETDocs\Libraries;
+
+use \BNETDocs\Libraries\Server;
+use \CarlBennett\MVC\Libraries\Common;
+use \CarlBennett\MVC\Libraries\Database;
+use \CarlBennett\MVC\Libraries\DatabaseDriver;
+use \DateTime;
+use \DateTimeZone;
+use \PDO;
+use \PDOException;
+
+class ServerMetric {
+
+  const CACHE_UPTIME_TTL = 300;
+
+  public static function &getUptime($server_id) {
+    $cache_key = "bnetdocs-servermetric-uptime-" . (int) $server_id;
+    $cache_val = Common::$cache->get($cache_key);
+    //if ($cache_val !== false) return unserialize($cache_val);
+    if (!isset(Common::$database)) {
+      Common::$database = DatabaseDriver::getDatabaseObject();
+    }
+    $stmt = Common::$database->prepare("
+      SELECT
+        MIN(`metric_datetime`) AS `lbound`,
+        MAX(`metric_datetime`) AS `ubound`
+      FROM `server_metrics`
+      WHERE `server_id` = :server_id AND `metric_datetime` >= (
+        SELECT `metric_datetime`
+        FROM `server_metrics`
+        WHERE `server_id` = :server_id AND NOT (`metric_flags` & "
+          . Server::STATUS_ONLINE . ")
+        ORDER BY `metric_datetime` DESC LIMIT 1
+      );
+    ");
+    $stmt->bindParam(":server_id", $server_id, PDO::PARAM_INT);
+    $stmt->execute();
+    $obj = $stmt->fetch(PDO::FETCH_OBJ);
+    $stmt->closeCursor();
+
+    $tz     = new DateTimeZone("UTC");
+    $lbound = new DateTime($obj->lbound, $tz);
+    $ubound = new DateTime($obj->ubound, $tz);
+    $range  = $ubound->diff($lbound);
+
+    Common::$cache->set($cache_key, serialize($range), self::CACHE_UPTIME_TTL);
+    return $range;
+  }
+
+}

src/models/Server/View.php

@@ -9,14 +9,16 @@ class View extends Model {
   public $server;
   public $server_id;
   public $server_type;
+  public $server_uptime;
   public $user_session;
 
   public function __construct() {
     parent::__construct();
-    $this->server       = null;
-    $this->server_id    = null;
-    $this->server_type  = null;
-    $this->user_session = null;
+    $this->server        = null;
+    $this->server_id     = null;
+    $this->server_type   = null;
+    $this->server_uptime = null;
+    $this->user_session  = null;
   }
 
 }

src/templates/Server/View.phtml

@@ -15,6 +15,11 @@ $object_user        = ($object      ? $object->getUser()             : null);
 $object_user_avatar = ($object_user ? $object_user->getAvatarURI(22) : null);
 $object_user_url    = ($object_user ? $object_user->getURI()         : null);
 
+$object_uptime = Common::intervalToString(
+  $this->getContext()->server_uptime,
+  "0 seconds"
+);
+
 $title       = ($object ? $object->getName() : "Server Not Found");
 $description = ($object ? "The BNETDocs Status Page for " . $object->getName()
   : "The requested server does not exist or could not be found.");
@@ -57,6 +62,7 @@ require("./header.inc.phtml");
             <tr><th>Owner</th><td><?php if ($object_user) { ?><a href="<?php echo $object_user_url; ?>"><img class="avatar" src="<?php echo $object_user_avatar; ?>"/> <?php echo filter_var($object_user->getName(), FILTER_SANITIZE_FULL_SPECIAL_CHARS); ?></a><?php } else { echo "Anonymous"; } ?></td></tr>
             <tr><th>Type</th><td><?php echo filter_var($object_type->getLabel(), FILTER_SANITIZE_FULL_SPECIAL_CHARS); ?></td></tr>
             <tr><th>Current Status:</th><td><?php echo $object_status; ?></td></tr>
+            <tr><th>Uptime:</th><td><?php echo $object_uptime; ?></td></tr>
           </tbody></table>
         </section>
       </article>