Implement task navigation info

Controller.php

@@ -75,7 +75,9 @@ class Controller extends ModuleAbstract implements WebInterface
      * @var string
      * @since 1.0.0
      */
-    protected static $providing = [];
+    protected static $providing = [
+        'Navigation'
+    ];
 
     /**
      * Dependencies.
@@ -183,6 +185,11 @@ class Controller extends ModuleAbstract implements WebInterface
         return [];
     }
 
+    public function openNav(int $account) : int
+    {
+        return TaskMapper::countUnread($account);
+    }
+
     /**
      * @param RequestAbstract  $request  Request
      * @param ResponseAbstract $response Response

Models/TaskMapper.php

@@ -157,6 +157,30 @@ class TaskMapper extends DataMapperAbstract
         return $objId;
     }
 
+    public static function countUnread(int $user) : int
+    {
+        try {
+            $query = new Builder(self::$db);
+
+            $query->prefix(self::$db->getPrefix())
+                  ->count()
+                  ->from(self::$table)
+                  ->where(self::$table . '.task_created_by', '=', $user)
+                  ->where(self::$table . '.task_status', '=', TaskStatus::OPEN, 'and');
+
+            $sth = self::$db->con->prepare($query->toSql());
+            $sth->execute();
+
+            $count = $sth->fetchAll()[0][0] ?? 0;
+        } catch (\Exception $e) {
+            var_dump($e->getMessage());
+
+            return false;
+        }
+
+        return $count;
+    }
+
     /**
      * Find.
      *