IcingaObject: add first rendering examples

library/Director/Objects/IcingaObject.php

@@ -3,6 +3,8 @@
 namespace Icinga\Module\Director\Objects;
 
 use Icinga\Module\Director\Data\Db\DbObject;
+use Icinga\Exception\ProgrammingError;
+use Exception;
 
 abstract class IcingaObject extends DbObject
 {
@@ -12,6 +14,8 @@ abstract class IcingaObject extends DbObject
 
     protected $supportsCustomVars = false;
 
+    private $type;
+
     public function supportsCustomVars()
     {
         return $this->supportsCustomVars;
@@ -19,13 +23,13 @@ abstract class IcingaObject extends DbObject
 
     public function isTemplate()
     {
-        return property_exists($this, 'object_type')
+        return $this->hasProperty('object_type')
             && $this->object_type === 'template';
     }
 
     public function isApplyRule()
     {
-        return property_exists($this, 'object_type')
+        return $this->hasProperty('object_type')
             && $this->object_type === 'apply';
     }
 
@@ -43,4 +47,170 @@ abstract class IcingaObject extends DbObject
     {
         DirectorActivityLog::logRemoval($this, $this->connection);
     }
+
+    protected function renderImports()
+    {
+        // TODO: parent_host ORDERed by weigth...
+        return '';
+    }
+
+    protected function renderProperties()
+    {
+        $out = '';
+        $blacklist = array(
+            'id',
+            'object_name',
+            'object_type',
+        );
+
+        foreach ($this->properties as $key => $value) {
+
+            if ($value === null) continue;
+            if (in_array($key, $blacklist)) continue;
+
+            $method = 'render' . ucfirst($key);
+            if (method_exists($this, $method)) {
+                $out .= $this->$method($value);
+            } else {
+                $out .= $this->renderKeyValue($key, $this->renderString($value));
+            }
+        }
+
+        return $out;
+    }
+
+    protected function renderKeyValue($key, $value, $prefix = '')
+    {
+        return sprintf(
+            "%s    %s = %s\n",
+            $prefix,
+            $key,
+            $value
+        );
+    }
+
+    protected function renderBoolean($value)
+    {
+        if ($value === 'y') {
+            return 'true';
+        } elseif ($value === 'n') {
+            return 'false';
+        } else {
+            throw new ProgrammingError('%s is not a valid boolean', $value);
+        }
+    }
+
+    protected function renderBooleanProperty($key)
+    {
+        return $this->renderKeyValue($key, $this->renderBoolean($this->$key));
+    }
+
+    protected function renderSuffix()
+    {
+        return "}\n";
+    }
+
+    protected function renderCustomVars()
+    {
+        if ($this->supportsCustomVars()) {
+            // TODO
+        }
+
+        return '';
+    }
+
+    protected function renderCommandProperty($commandId, $propertyName = 'check_command')
+    {
+        return $this->renderKeyValue(
+            $propertyName,
+            $this->renderString($this->connection->getCommandName($commandId))
+        );
+    }
+
+    protected function renderZoneProperty($zoneId, $propertyName = 'zone')
+    {
+        return $this->renderKeyValue(
+            $propertyName,
+            $this->renderString($this->connection->getZoneName($zoneId))
+        );
+    }
+
+    protected function renderZone_id()
+    {
+        return $this->renderZoneProperty($this->zone_id);
+    }
+
+    protected function renderObjectHeader()
+    {
+        return sprintf(
+            "%s %s %s {\n",
+            $this->getObjectTypeName(),
+            $this->getType(),
+            $this->renderString($this->getObjectName())
+        );
+    }
+
+    public function toConfigString()
+    {
+        return implode(array(
+            $this->renderObjectHeader(),
+            $this->renderImports(),
+            $this->renderProperties(),
+            $this->renderCustomVars(),
+            $this->renderSuffix()
+        ));
+    }
+
+    protected function renderString($string)
+    {
+        $string = preg_replace('~\\\~', '\\\\', $string);
+        $string = preg_replace('~"~', '\\"', $string);
+
+        return sprintf('"%s"', $string);
+    }
+
+    protected function getType()
+    {
+        if ($this->type === null) {
+            $parts = explode('\\', get_class($this));
+            // 6 = strlen('Icinga');
+            $this->type = substr(end($parts), 6);
+        }
+
+        return $this->type;
+    }
+
+    protected function getObjectTypeName()
+    {
+        if ($this->isTemplate()) {
+            return 'template';
+        } elseif ($this->isApplyRule()) {
+            return 'apply';
+        } else {
+            return 'object';
+        }
+    }
+
+    protected function getObjectName()
+    {
+        if ($this->hasProperty('object_name')) {
+            return $this->object_name;
+        } else {
+            // TODO: replace with an exception once finished
+            return 'ERROR: NO NAME';
+        }
+    }
+
+    public function __toString()
+    {
+        try {
+            return $this->toConfigString();
+        } catch (Exception $e) {
+            trigger_error($e);
+            $previousHandler = set_exception_handler(function () {});
+            restore_error_handler();
+            call_user_func($previousHandler, $e);
+            die();
+        }
+    }
 }