Created abstract structures to keep complexity and code redundancy at bay.

src/admin/abstract/controller.php

@@ -0,0 +1,189 @@
+<?php
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\MVC\Controller\BaseController;
+use Joomla\CMS\Router\Route;
+
+// No direct access.
+defined('_JEXEC') or die;
+
+abstract class AbstractClubsController extends BaseController
+{
+    
+    protected abstract function getNameOfElement();
+    
+    protected function getModelName()
+    {
+        return $this->getNameOfElement();
+    }
+    
+    protected function getNameOfView()
+    {
+        return strtolower($this->getNameOfElement());
+    }
+    
+    protected abstract function getDataMapping();
+    
+    function new()
+    {
+        $obj = call_user_func(array('Clubs' . $this->getNameOfElement(), 'create' . $this->getNameOfElement()));
+        
+        // Fetch the posted data
+        $values = $this->loadData();
+
+        $this->filterPreCheck($values);
+        
+        // Check the input data
+        $error = $this->checkData($values);
+        
+        $view = $this->getNameOfView();
+        
+        if($error)
+        {
+            $urldata = $this->packData($values);
+            $this->setRedirect(Route::_("index.php?option=com_clubs&view={$view}&id=new&data={$urldata}", false));
+            return;
+        }
+        
+        $this->applyData($obj, $values);
+        
+        // Do the actual work
+        $obj->save();
+        $this->setRedirect(Route::_("index.php?option=com_clubs&view={$view}s", false));
+    }
+    
+    function change()
+    {
+        $app = Factory::getApplication();
+        $input = $app->input;
+        $id = (int) $input->post->getInt('id');
+        
+        $obj = call_user_func(array('Clubs' . $this->getNameOfElement(), 'load' . $this->getNameOfElement()), (int) $id);
+        
+        // Fetch the posted data
+        $values = $this->loadData();
+        
+        $this->filterPreCheck($values);
+        
+        // Check the input data
+        $error = $this->checkData($values);
+        
+        $view = $this->getNameOfView();
+        
+        if($error)
+        {
+            $urldata = $this->packData($values);
+            $this->setRedirect(Route::_("index.php?option=com_clubs&view={$view}&id={$id}&data={$urldata}", false));
+            return;
+        }
+        
+        $this->applyData($obj, $values);
+        
+        // Do the actual work
+        $obj->save();
+        $this->setRedirect(Route::_("index.php?option=com_clubs&view={$view}s", false));
+    }
+    
+    protected function loadData()
+    {
+        $values = array();
+        $input = Factory::getApplication()->input->post;
+        
+        foreach($this->getDataMapping() as $m => $f)
+        {
+            $filter = (isset($f['filter'])) ? $f['filter'] : 'string';
+            
+            $values[$m] = $input->get($m, null, $filter);
+        }
+        
+        return $values;
+    }
+    
+    protected function filterPreCheck(&$values){}
+    
+    protected function checkData($values)
+    {
+        $error = false;
+        // Check existence of the required fields
+        foreach ($this->getDataMapping() as $m => $v)
+        {
+            if(! isset($v['required']) || ! $v['required'])
+                continue;
+            
+            // Field is required
+            if(! $this->fieldValid($m, $values[$m], $v))
+            {
+                $fname = (isset($v['name'])) ? $v['name'] : $m;
+                Factory::getApplication()->enqueueMessage("Das Feld $fname ist obligatorisch.", 'error');
+                $error = true;
+            }
+        }
+        
+        return $error;
+    }
+    
+    protected function fieldValid($name, $value, $options)
+    {
+        if(empty($value))
+            return false;
+        
+        if(isset($options['filter']))
+        {
+            switch($options['filter'])
+            {
+                case 'string':
+                    if(empty(trim($value)))
+                        return false;
+            }
+        }
+        
+        return true;
+    }
+    
+    private function packData($values)
+    {
+        $data = array();
+        foreach($this->getDataMapping() as $i)
+            $data[$i] = $values[$i];
+            
+        return urlencode(json_encode($data));
+    }
+    
+    public function applyData($obj, $values)
+    {
+        foreach($this->getDataMapping() as $m => $v)
+        {
+            $functionName = $this->getSetterMethodName($m, $v);
+            $value = (isset($values[$m])) ? $values[$m] : null;
+            $obj->$functionName($value);
+        }
+    }
+    
+    private function getSetterMethodName($m, $options)
+    {
+        if(isset($options['setter']))
+            return $options['setter'];
+        
+        $firstChar = substr($m, 0, 1);
+        $restChars = substr($m, 1);
+        return 'set' . strtoupper($firstChar) . $restChars;
+    }
+    
+    function delete()
+    {
+        $app = Factory::getApplication();
+        
+        $id = $app->input->get->getInt('id');
+        $name = $this->getNameOfElement();
+        $app->enqueueMessage("Removal of $name with id $id.");
+        
+        $className = 'Clubs' . $this->getModelName();
+        $functionName = 'load' . $this->getModelName();
+        $element = call_user_func(array($className, $functionName), $id);
+        $element->delete();
+        
+        $view = $this->getNameOfView();
+        $this->setRedirect(Route::_("index.php?option=com_clubs&view={$view}s", false));
+    }
+    
+}

src/admin/abstract/model.php

@@ -5,7 +5,7 @@ use Joomla\CMS\Factory;
 
 defined('_JEXEC') or die;
 
-abstract class ClubsAbstractModel
+abstract class AbstractClubsModel
 {
     protected $id;
     
@@ -98,12 +98,12 @@ abstract class ClubsAbstractModel
         foreach($mappings as $m)
             $values[$m] = $this->$m;
             
-        $this->preFilter($values);
+        $this->filter($values);
         
         foreach($mappings as $m)
             $values[$m] = $q->q($values[$m]);
             
-        $this->postFilter($values);
+        $this->postQuoteFilter($values);
         
         $q->insert($this->getTableName())
           ->columns(array_map(array($q, 'qn'), $mappings))
@@ -130,12 +130,12 @@ abstract class ClubsAbstractModel
         foreach($mapping as $m)
             $values[$m] = $this->$m;
         
-        $this->preFilter($values);
+        $this->filter($values);
         
         foreach($mapping as $m)
             $values[$m] = $q->q($values[$m]);
         
-        $this->postFilter($values);
+        $this->postQuoteFilter($values);
         
         $q->update($this->getTableName());
         foreach($mapping as $m)
@@ -146,11 +146,15 @@ abstract class ClubsAbstractModel
         $dbo->execute();
     }
     
+    protected function prepareDelete(){}
+    
     public function delete()
     {
         if($this->id === 'new')
             return;
         
+        $this->prepareDelete();
+        
         $dbo = Factory::getDbo();
         
         $q = $dbo->getQuery(true);
@@ -161,13 +165,23 @@ abstract class ClubsAbstractModel
         $dbo->execute();
     }
     
+    protected function getRequiredDataMappings()
+    {
+        return $this->getDataMappings();
+    }
+    
     protected function isDataValid()
     {
+        foreach($this->getRequiredDataMappings() as $m)
+        {
+            if(!isset($this->$m) || empty($this->$m) || $this->$m === null)
+                return false;
+        }
         return true;
     }
     
-    protected function preFilter(&$values){}
+    protected function filter(&$values){}
-    protected function postFilter(&$values){}
+    protected function postQuoteFilter(&$values){}
     
     
 }

src/admin/abstract/view/single.php

@@ -0,0 +1,77 @@
+<?php
+
+use Joomla\CMS\Factory;
+use Joomla\CMS\MVC\View\HtmlView;
+use Joomla\CMS\Router\Route;
+
+// No direct access.
+defined('_JEXEC') or die;
+
+abstract class AbstractClubsViewSingle extends HtmlView
+{
+    
+    protected $address;
+    protected $object;
+    protected $isNew;
+    
+    function display($tpl = null)
+    {
+        
+        $input = Factory::getApplication()->input;
+        $id =  $input->get->get('id');
+        
+        $modelClass = 'Clubs' . $this->getModelName();
+        
+        $controller = $this->getControllerName();
+        if($id === 'new')
+        {
+            $this->address = Route::_("index.php?option=com_clubs&task={$controller}.new");
+            $this->object = call_user_func(array($modelClass, 'create' . $this->getModelName()));
+            $this->isNew = true;
+        }
+        else if(is_numeric($id))
+        {
+            $this->address = Route::_("index.php?option=com_clubs&task={$controller}.change");
+            $this->object = call_user_func(array($modelClass, 'load' . $this->getModelName()), (int) $id);
+            $this->isNew = false;
+        }
+        else
+            throw new Exception('Need an object id.');
+            
+        if($input->get->get('data', null, 'json') != null)
+        {
+            // Restore previous data
+            $dataurl = $input->get->get('data', null, 'json');
+            $data = json_decode($dataurl, true);
+            
+            $controller = $this->getElementController();
+            $controller->applyData($this->object, $data);
+            
+        }
+        
+        parent::display($tpl);
+    }
+    
+    protected abstract function getViewName();
+    
+    protected function getControllerName()
+    {
+        return $this->getViewName();
+    }
+    
+    protected function getModelName()
+    {
+        $name = $this->getViewName();
+        return $this->capitalize($name);
+    }
+    
+    private function capitalize($s)
+    {
+        $first = substr($s, 0, 1);
+        $rest = substr($s, 1);
+        return strtoupper($first) . $rest;
+    }
+    
+    protected abstract function getElementController();
+    
+}

src/admin/clubs.php

@@ -7,6 +7,7 @@ use Joomla\CMS\MVC\Controller\BaseController;
 defined('_JEXEC') or die;
 
 JLoader::discover('Clubs', JPATH_ROOT . '/administrator/components/com_clubs/mymodels');
+JLoader::registerPrefix('AbstractClubs', JPATH_ROOT . '/administrator/components/com_clubs/abstract');
 
 $controller = BaseController::getInstance("Clubs");
 $input = Factory::getApplication()->input;

src/admin/controllers/offer.php

@@ -1,108 +1,23 @@
 <?php
 
-use Joomla\CMS\Factory;
-use Joomla\CMS\MVC\Controller\BaseController;
-use Joomla\CMS\Router\Route;
 
 // No direct access.
 defined('_JEXEC') or die;
 
-class ClubsControllerOffer extends BaseController
+class ClubsControllerOffer extends AbstractClubsController
 {
-    
+    protected function getNameOfElement()
-    function new()
     {
-        $app = Factory::getApplication();
+        return 'offer';
-        $input = $app->input;
-        $o = ClubsOffer::createOffer();
-        
-        // Fetch the posted data
-        $name = $input->post->getString('name');
-        
-        // Check the input data
-        $error = false;
-        
-        // Check existence of the other fields
-        $fields = array('name'=>'Bezeichnung');
-        foreach ($fields as $f => $fname)
-        {
-            $fvalue = $$f;
-            if(! isset($fvalue) || empty(trim($fvalue)))
-            {
-                $app->enqueueMessage("Das Feld $fname ist obligatorisch.", 'error');
-                $error = true;
-            }
     }
 
-        if($error)
+    protected function getDataMapping()
     {
-            $data = array();
+        return array(
-            foreach(array('name') as $i)
+            'name' => array('required'=>true, 'name'=>'Bezeichnung', 'filter'=>'string')
-                $data[$i] = $$i;
+        );
-                
-            $urldata = urlencode(json_encode($data));
-            $this->setRedirect(Route::_('index.php?option=com_clubs&view=offer&id=new&data=' . $urldata, false));
-            return;
     }
 
-        $o->setName($name);
     
-        // Do the actual work
-        $o->save();
-        $this->setRedirect(Route::_('index.php?option=com_clubs&view=offers', false));
-    }
-    
-    function change()
-    {
-        $app = Factory::getApplication();
-        $input = $app->input;
-        $id = (int) $input->post->getInt('id');
-        $o = ClubsOffer::loadOffer((int) $id);
-        
-        // Fetch the posted data
-        $name = $input->post->getString('name');
-        
-        // Check the input data
-        $error = false;
-        
-        // Check existence of the other fields
-        $fields = array('name'=>'Bezeichnung');
-        foreach ($fields as $f => $fname)
-        {
-            $fvalue = $$f;
-            if(! isset($fvalue) || empty(trim($fvalue)))
-            {
-                $app->enqueueMessage("Das Feld $fname ist obligatorisch.", 'error');
-                $error = true;
-            }
-        }
-        
-        if($error)
-        {
-            $data = array();
-            foreach(array('name') as $i)
-                $data[$i] = $$i;
-                
-                $urldata = urlencode(json_encode($data));
-                $this->setRedirect(Route::_('index.php?option=com_clubs&view=offer&id=' . $id . '&data=' . $urldata, false));
-                return;
-        }
-        
-        $o->setName($name);
-        
-        // Do the actual work
-        $o->save();
-        $this->setRedirect(Route::_('index.php?option=com_clubs&view=offers', false));
-    }
-    
-    function delete()
-    {
-        $app = Factory::getApplication();
-        $id = $app->input->get->getInt('id');
-        $app->enqueueMessage("Removal of offer with id $id.");
-        $user = ClubsOffer::loadOffer($id);
-        $user->delete();
-        $this->setRedirect(Route::_('index.php?option=com_clubs&view=offers', false));
-    }
     
 }

src/admin/mymodels/offer.php

@@ -1,21 +1,12 @@
 <?php
 
 // No direct access.
-use Joomla\CMS\Factory;
 
 defined('_JEXEC') or die;
 
-class ClubsOffer
+class ClubsOffer extends AbstractClubsModel
 {
-    protected $id;
     protected $name;
-    /**
-     * @return int
-     */
-    public function getId()
-    {
-        return $this->id;
-    }
 
     /**
      * @return string
@@ -28,62 +19,26 @@ class ClubsOffer
     /**
      * @param string $name
      */
-    public function setName(string $name)
+    public function setName($name)
     {
         $this->name = $name;
     }
 
-    protected function loadData(array $data)
-    {
-        $this->id = $data['id'];
-        $this->name = $data['name'];
-    }
-    
     protected function __construct()
     {}
     
+    private const tableName = '#__club_offers';
+    private const className = 'ClubsOffer';
+    
     public static function loadOffers()
     {
-        $dbo = Factory::getDbo();
+        return self::loadElements(self::tableName, self::className);
-        $q = $dbo->getQuery(true);
-        $q->select('*')
-        ->from('#__club_offers');
-        $dbo->setQuery($q);
-        $dbo->execute();
-        $list = $dbo->loadAssocList('id');
-        
-        $ret = array();
-        foreach($list as $o)
-        {
-            $oo = new ClubsOffer();
-            $oo->loadData($o);
-            
-            $ret[] = $oo;
-        }
-        
-        return $ret;
     }
     
     
     public static function loadOffer(int $id)
     {
-        $dbo = Factory::getDbo();
+        return self::loadElement($id, self::tableName, self::className);
-        $q = $dbo->getQuery(true);
-        $q->select('*')->from('#__club_offers')->where('id=' . (int) $id);
-        $dbo->setQuery($q);
-        $dbo->execute();
-        
-        $row = $dbo->loadAssoc();
-        
-        if($row == null)
-        {
-            throw new Exception("No offer found.");
-            // TODO
-        }
-        
-        $offer = new ClubsOffer();
-        $offer->loadData($row);
-        return $offer;
     }
     
     public static function createOffer()
@@ -93,65 +48,14 @@ class ClubsOffer
         return $offer;
     }
     
-    
+    protected function getDataMappings()
-    public function save()
     {
-        if($this->id === 'new')
+        return array('name');
-            $this->insertOffer();
-        else
-            $this->updateOffer();
     }
 
-    private function insertOffer()
+    protected function getTableName()
     {
-        $dbo = Factory::getDbo();
+        return self::tableName;
-        $q = $dbo->getQuery(true);
-        
-        $vname = $q->q($this->name);
-        
-        $q->insert('#__club_offers')
-        ->columns(array('name'))
-        ->values("$vname")
-        ;
-        
-        $dbo->transactionStart();
-        $dbo->setQuery($q);
-        $dbo->execute();
-        $this->id = $dbo->insertid();
-        $dbo->transactionCommit();
     }
     
-    private function updateOffer()
-    {
-        $dbo = Factory::getDbo();
-        $q = $dbo->getQuery(true);
-        
-        $vname = $q->q($this->name);
-        
-        $q->update('#__club_offers')
-        ->set(array(
-            "name=$vname"
-        ))
-        ->where("id=". (int) $this->id)
-        ;
-        
-        $dbo->setQuery($q);
-        $dbo->execute();
-    }
-    
-    public function delete()
-    {
-        if($this->id === 'new')
-            return;
-        $dbo = Factory::getDbo();
-        
-        $q = $dbo->getQuery(true);
-        $q->delete('#__club_offers')
-          ->where('id=' . (int) $this->id);
-        
-        $dbo->setQuery($q);
-        $dbo->execute();
-    }
-    
-    
 }

src/admin/mymodels/position.php

@@ -1,21 +1,11 @@
 <?php
 
 // No direct access.
-use Joomla\CMS\Factory;
-
 defined('_JEXEC') or die;
 
-class ClubsPosition
+class ClubsPosition extends ClubsAbstractModel
 {
-    protected $id;
     protected $name;
-    /**
-     * @return int
-     */
-    public function getId()
-    {
-        return $this->id;
-    }
 
     /**
      * @return string
@@ -33,57 +23,21 @@ class ClubsPosition
         $this->name = $name;
     }
 
-    protected function loadData(array $data)
-    {
-        $this->id = $data['id'];
-        $this->name = $data['name'];
-    }
-    
     protected function __construct()
     {}
     
+    private const tableName = '#__club_positions';
+    private const className = 'ClubsPosition';
+    
     public static function loadPositions()
     {
-        $dbo = Factory::getDbo();
+        return self::loadElements(self::tableName, self::className);
-        $q = $dbo->getQuery(true);
-        $q->select('*')
-        ->from('#__club_positions');
-        $dbo->setQuery($q);
-        $dbo->execute();
-        $list = $dbo->loadAssocList('id');
-        
-        $ret = array();
-        foreach($list as $p)
-        {
-            $po = new ClubsPosition();
-            $po->loadData($p);
-            
-            $ret[] = $po;
-        }
-        
-        return $ret;
     }
     
     
     public static function loadPosition(int $id)
     {
-        $dbo = Factory::getDbo();
+        return self::loadElement($id, self::tableName, self::className);
-        $q = $dbo->getQuery(true);
-        $q->select('*')->from('#__club_positions')->where('id=' . (int) $id);
-        $dbo->setQuery($q);
-        $dbo->execute();
-        
-        $row = $dbo->loadAssoc();
-        
-        if($row == null)
-        {
-            throw new Exception("No position found.");
-            // TODO
-        }
-        
-        $position = new ClubsPosition();
-        $position->loadData($row);
-        return $position;
     }
     
     public static function createPosition()
@@ -93,65 +47,16 @@ class ClubsPosition
         return $position;
     }
     
-    
+    protected function getDataMappings()
-    public function save()
     {
-        if($this->id === 'new')
+        return array('name');
-            $this->insertPosition();
-        else
-            $this->updatePosition();
     }
 
-    private function insertPosition()
+    protected function getTableName()
     {
-        $dbo = Factory::getDbo();
+        return self::tableName;
-        $q = $dbo->getQuery(true);
-        
-        $vname = $q->q($this->name);
-        
-        $q->insert('#__club_positions')
-          ->columns(array('name'))
-          ->values("$vname")
-          ;
-        
-        $dbo->transactionStart();
-        $dbo->setQuery($q);
-        $dbo->execute();
-        $this->id = $dbo->insertid();
-        $dbo->transactionCommit();
-    }
-    
-    private function updatePosition()
-    {
-        $dbo = Factory::getDbo();
-        $q = $dbo->getQuery(true);
-        
-        $vname = $q->q($this->name);
-        
-        $q->update('#__club_positions')
-          ->set(array(
-            "name=$vname"
-          ))
-          ->where("id=". (int) $this->id)
-          ;
-        
-        $dbo->setQuery($q);
-        $dbo->execute();
-    }
-    
-    public function delete()
-    {
-        if($this->id === 'new')
-            return;
-        $dbo = Factory::getDbo();
-        
-        $q = $dbo->getQuery(true);
-        $q->delete('#__club_positions')
-          ->where('id=' . (int) $this->id);
-        
-        $dbo->setQuery($q);
-        $dbo->execute();
     }
 
     
+    
 }

src/admin/views/offer/tmpl/default.php

@@ -8,16 +8,16 @@ defined('_JEXEC') or die;
 ?>
 
 <form method="post" action="<?php echo $this->address; ?>">
-<input type='hidden' name='id' value='<?php echo $this->offer->getId(); ?>'>
+<input type='hidden' name='id' value='<?php echo $this->object->getId(); ?>'>
 <table>
   <tr>
     <td>Bezeichnung</td>
-    <td><input type='text' name='name' value='<?php echo htmlentities($this->offer->getName()); ?>'></td>
+    <td><input type='text' name='name' value='<?php echo htmlentities($this->object->getName()); ?>'></td>
   </tr>
   <?php if(! $this->isNew): ?>
   <tr>
     <td>ID</td>
-    <td><?php echo $this->offer->getId(); ?></td>
+    <td><?php echo $this->object->getId(); ?></td>
   </tr>
   <?php endif; ?>
 </table>

src/admin/views/offer/view.html.php

@@ -1,47 +1,29 @@
 <?php
 
-use Joomla\CMS\Factory;
-use Joomla\CMS\MVC\View\HtmlView;
-use Joomla\CMS\Router\Route;
 use Joomla\CMS\Toolbar\ToolbarHelper;
 
 // No direct access.
 defined('_JEXEC') or die;
 
-class ClubsViewOffer extends HtmlView
+JLoader::register("ClubsControllerOffer", JPATH_ROOT . "/administrator/components/com_clubs/controllers/offer.php");
+
+class ClubsViewOffer extends AbstractClubsViewSingle
 {
     function display($tpl = null)
     {
         
-        $input = Factory::getApplication()->input;
-        $id =  $input->get->get('id');
-        
-        if($id === 'new')
-        {
-            $this->address = Route::_('index.php?option=com_clubs&task=offer.new');
-            $this->offer = ClubsOffer::createOffer();
-            $this->isNew = true;
-        }
-        else if(is_numeric($id))
-        {
-            $this->address = Route::_('index.php?option=com_clubs&task=offer.change');
-            $this->offer = ClubsOffer::loadOffer((int) $id);
-            $this->isNew = false;
-        }
-        else
-            throw new Exception('Need a user id.');
-            
-        if($input->get->get('data', null, 'json') != null)
-        {
-            // Restore previous data
-            $dataurl = $input->get->get('data', null, 'json');
-            $data = json_decode($dataurl, true);
-            
-            $this->offer->setName($data['name']);
-            
-        }
-        
         ToolbarHelper::title('Club-Management - Angebot');
         parent::display($tpl);
     }
+    
+    protected function getViewName()
+    {
+        return 'offer';
+    }
+    protected function getElementController()
+    {
+        return new ClubsControllerOffer();
+    }
+
+
 }

src/site/clubs.php

@@ -7,6 +7,7 @@ use Joomla\CMS\Factory;
 defined('_JEXEC') or die;
 
 JLoader::discover('Clubs', JPATH_ROOT . '/administrator/components/com_clubs/mymodels');
+JLoader::registerPrefix('AbstractClubs', JPATH_ROOT . '/administrator/components/com_clubs/abstract');
 
 $controller = BaseController::getInstance("Clubs");
 $input = Factory::getApplication()->input;