class.ilADTBasedObjectGUI.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

abstract class ilADTBasedObjectGUI
{
    protected $object; // [ilADTBasedObject]
    
    public function __construct(ilObjectGUI $a_parent_gui)
    {
        $this->gui = $a_parent_gui;
        $this->object = $this->initObject();
    }
    
    abstract protected function initObject();
    
    
    //
    // VERY BASIC EXAMPLE OF FORM HANDLING
    //
    
    public function editAction(ilADTGroupFormBridge $a_form = null)
    {
        global $tpl;
        
        if (!$a_form) {
            $a_form = $this->initForm();
        }
                
        $tpl->setContent($a_form->getForm()->getHTML());
    }
    
    abstract protected function prepareFormElements(ilADTGroupFormBridge $a_adt_form);
    
    protected function initForm()
    {
        global $tpl, $lng, $ilCtrl;
        
        include_once "Services/Form/classes/class.ilPropertyFormGUI.php";
        $form = new ilPropertyFormGUI();
        $form->setFormAction($ilCtrl->getFormAction($this->gui, "updateAction"));
        
        $adt_form = ilADTFactory::getInstance()->getFormBridgeForInstance($this->object->getProperties());
        
        // has to be done BEFORE prepareFormElements() ...
        $adt_form->setForm($form);
            
        $this->prepareFormElements($adt_form);
        
        $adt_form->addToForm();
        $adt_form->addJS($tpl);
        
        // :TODO:
        $form->addCommandButton("updateAction", $lng->txt("save"));
                
        return $adt_form;
    }
    
    public function updateAction()
    {
        global $lng, $ilCtrl;
        
        $adt_form = $this->initForm();
        $valid = $adt_form->getForm()->checkInput(); // :TODO: return value is obsolete
        
        $old_chksum = $this->object->getProperties()->getCheckSum();
        
        $adt_form->importFromPost();
        $valid = $adt_form->validate();
        
        $changed = ($old_chksum != $this->object->getProperties()->getCheckSum());
        
        // validation errors have top priority
        if (!$valid) {
            ilUtil::sendFailure($lng->txt("form_input_not_valid"));
            return $this->editAction($adt_form);
        }
                
        // :TODO: experimental, update only if necessary
        if ($changed) {
            if ($this->object->update()) {
                ilUtil::sendSuccess($lng->txt("settings_saved"), true);
            } else {
                // error occured in db-layer (primary/unique)
                foreach ($this->object->getDBErrors() as $element_id => $codes) {
                    $element = $adt_form->getElement($element_id);
                    if ($element) {
                        $element->setExternalErrors($this->object->translateDBErrorCodes($codes));
                    }
                }
                
                ilUtil::sendFailure($lng->txt("form_input_not_valid"));
                return $this->editAction($adt_form);
            }
        }
        
        $ilCtrl->redirect($this->gui, "edit");
    }
}