Settings: remove settings logic from DB...

...and keep helper method for easy instantiation

application/controllers/HostController.php

@@ -84,10 +84,7 @@ class HostController extends ObjectController
             $tables[0] = $table;
         }
 
-        if ($applied = $host->vars()->get($db->getSetting(
+        if ($applied = $host->vars()->get($db->settings()->magic_apply_for)) {
-            'magic_apply_for',
-            '_director_apply_for'
-        ))) {
             $table = $this->loadTable('IcingaHostAppliedForService')
                 ->setHost($host)
                 ->setDictionary($applied)
@@ -126,10 +123,7 @@ class HostController extends ObjectController
         $host = $this->object;
         $serviceName = $this->params->get('service');
 
-        $applied = $host->vars()->get($db->getSetting(
+        $applied = $host->vars()->get($db->settings()->magic_apply_for);
-            'magic_apply_for',
-            '_director_apply_for'
-        ));
 
         $props = $applied->{$serviceName};
 

library/Director/Db.php

@@ -61,6 +61,15 @@ class Db extends DbConnection
         return (int) $db->fetchOne($query);
     }
 
+    public function settings()
+    {
+        if ($this->settings === null) {
+            $this->settings = new Settings($this);
+        }
+
+        return $this->settings;
+    }
+
     public function getMasterZoneName()
     {
         if ($this->masterZoneName === null) {
@@ -72,7 +81,7 @@ class Db extends DbConnection
 
     protected function detectMasterZoneName()
     {
-        if ($zone = $this->getSetting('master_zone')) {
+        if ($zone = $this->settings()->master_zone) {
             return $zone;
         }
 
@@ -93,7 +102,7 @@ class Db extends DbConnection
 
     public function getDefaultGlobalZoneName()
     {
-        return $this->getSetting('default_global_zone', 'director-global');
+        return $this->settings()->default_global_zone;
     }
 
     public function hasDeploymentEndpoint()
@@ -152,63 +161,6 @@ class Db extends DbConnection
         return IcingaEndpoint::load($this->getDeploymentEndpointName(), $this);
     }
 
-    public function getSetting($name, $default = null)
-    {
-        if ($this->settings === null) {
-            $this->fetchSettings();
-        }
-
-        if (array_key_exists($name, $this->settings)) {
-            return $this->settings[$name];
-        }
-
-        return $default;
-    }
-
-    public function storeSetting($name, $value)
-    {
-        $db = $this->db();
-        if ($this->getSetting($name) === $value) {
-            return $this;
-        }
-
-        $updated = $db->update(
-            'director_setting',
-            array('setting_value' => $value),
-            $db->quoteInto('setting_name = ?', $name)
-        );
-
-        if ($updated === 0) {
-            $db->insert(
-                'director_setting',
-                array(
-                    'setting_name'  => $name,
-                    'setting_value' => $value,
-                )
-            );
-        }
-
-        if ($this->settings !== null) {
-            $this->settings[$name] = $value;
-        }
-
-        return $this;
-    }
-
-    public function fetchSettings($force = true)
-    {
-        if ($force || $this->settings === null) {
-            $db = $this->db();
-            $query = $db->select()->from(
-                array('s' => 'director_setting'),
-                array('setting_name', 'setting_value')
-            );
-            $this->settings = (array) $db->fetchPairs($query);
-        }
-
-        return $this->settings;
-    }
-
     public function getActivitylogNeighbors($id, $type = null, $name = null)
     {
         $db = $this->db();

library/Director/KickstartHelper.php

@@ -268,7 +268,7 @@ class KickstartHelper
             $object->store();
         }
 
-        $db->storeSetting('master_zone', $this->deploymentEndpoint->zone);
+        $db->settings()->master_zone = $this->deploymentEndpoint->zone;
 
         return $this;
     }

library/Director/Settings.php

@@ -0,0 +1,127 @@
+<?php
+
+namespace Icinga\Module\Director;
+
+class Settings
+{
+    protected $connection;
+
+    protected $db;
+
+    protected $cache;
+
+    protected $defaults = array(
+        'default_global_zone'            => 'director-global',
+        'magic_apply_for'                => '_director_apply_for',
+        'config_format'                  => 'v2',
+        'override_services_varname'      => '_override_servicevars',
+        'override_services_templatename' => 'host var overrides (Director)',
+        // 'experimental_features'       => null, // 'allow'
+        // 'master_zone'                 => null,
+    );
+
+    public function __construct(Db $connection)
+    {
+        $this->connection = $connection;
+        $this->db = $connection->getDbAdapter();
+    }
+
+    public function get($key, $default = null)
+    {
+        if (null === ($value = $this->getSetting($key))) {
+            if ($default === null) {
+                return $this->getDefaultValue($key);
+            } else {
+                return $default;
+            }
+        }
+    }
+
+    public function getDefaultValue($key)
+    {
+        if (array_key_exists($key, $this->defaults)) {
+            return $this->defaults[$key];
+        } else {
+            return null;
+        }
+    }
+
+    public function set($name, $value)
+    {
+        $db = $this->db;
+
+        if ($this->getSetting($name) === $value) {
+            return $this;
+        }
+
+        $updated = $db->update(
+            'director_setting',
+            array('setting_value' => $value),
+            $db->quoteInto('setting_name = ?', $name)
+        );
+
+        if ($updated === 0) {
+            $db->insert(
+                'director_setting',
+                array(
+                    'setting_name'  => $name,
+                    'setting_value' => $value,
+                )
+            );
+        }
+
+        if ($this->cache !== null) {
+            $this->cache[$name] = $value;
+        }
+
+        return $this;
+    }
+
+    public function clearCache()
+    {
+        $this->cache = null;
+        return $this;
+    }
+
+    protected function getSetting($name, $default = null)
+    {
+        if ($this->cache === null) {
+            $this->refreshCache();
+        }
+
+        if (array_key_exists($name, $this->cache)) {
+            return $this->cache[$name];
+        }
+
+        return $default;
+    }
+
+    protected function refreshCache()
+    {
+        $db = $this->db;
+
+        $query = $db->select()->from(
+            array('s' => 'director_setting'),
+            array('setting_name', 'setting_value')
+        );
+
+        $this->cache = (array) $db->fetchPairs($query);
+    }
+
+    public function __get($key)
+    {
+        return $this->get($key);
+    }
+
+    public function __set($key, $value)
+    {
+        $this->set($key, $value);
+    }
+
+    public function __destruct()
+    {
+        $this->clearCache();
+        unset($this->db);
+        unset($this->connection);
+    }
+}

library/Director/Web/Form/DirectorObjectForm.php

@@ -1429,7 +1429,7 @@ abstract class DirectorObjectForm extends QuickForm
         // NO, it is NOT a good idea to use this. You'll break your monitoring
         // and nobody will help you.
         if ($this->allowsExperimental === null) {
-            $this->allowsExperimental = $this->db->getSetting(
+            $this->allowsExperimental = $this->db->settings()->get(
                 'experimental_features'
             ) === 'allow';
         }