class.ilADTBasedObjectGUI.php

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<?php
 
declare(strict_types=1);
abstract class ilADTBasedObjectGUI
{
    private ilObjectGUI $gui;
    protected ?ilADTBasedObject $object = null;
 
    protected ilGlobalTemplateInterface $tpl;
    protected ilLanguage $lng;
    protected ilCtrl $ctrl;
 
    public function __construct(ilObjectGUI $a_parent_gui)
    {
        global $DIC;
        $this->tpl = $DIC->ui()->mainTemplate();
        $this->lng = $DIC->language();
        $this->ctrl = $DIC->ctrl();
 
        $this->gui = $a_parent_gui;
        $this->object = $this->initObject();
    }
 
    abstract protected function initObject(): ilADTBasedObject;
 
 
    //
    // VERY BASIC EXAMPLE OF FORM HANDLING
    //
 
    public function editAction(?ilADTGroupFormBridge $a_form = null): bool
    {
        if (!$a_form) {
            $a_form = $this->initForm();
        }
 
        $this->tpl->setContent($a_form->getForm()->getHTML());
        return true;
    }
 
    abstract protected function prepareFormElements(ilADTGroupFormBridge $a_adt_form): void;
 
    protected function initForm(): ilADTFormBridge
    {
        $form = new ilPropertyFormGUI();
        $form->setFormAction($this->ctrl->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();
        $adt_form->addJS($this->tpl);
 
        // :TODO:
        $form->addCommandButton("updateAction", $this->lng->txt("save"));
 
        return $adt_form;
    }
 
    public function updateAction(): bool
    {
        $adt_form = $this->initForm();
        $valid = $adt_form->getForm()->checkInput();
 
        $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) {
            $this->tpl->setOnScreenMessage('failure', $this->lng->txt("form_input_not_valid"));
            return $this->editAction($adt_form);
        }
 
        // :TODO: experimental, update only if necessary
        if ($changed) {
            if ($this->object->update()) {
                $this->tpl->setOnScreenMessage('success', $this->lng->txt("settings_saved"), true);
            } else {
                // error occured in db-layer (primary/unique)
                foreach ($this->object->getDBErrors() as $element_id => $codes) {
                    $element = $adt_form->getElement($element_id);
                    if ($element) {
                        $element->setExternalErrors($this->object->translateDBErrorCodes($codes));
                    }
                }
 
                $this->tpl->setOnScreenMessage('failure', $this->lng->txt("form_input_not_valid"));
                return $this->editAction($adt_form);
            }
        }
 
        $this->ctrl->redirect($this->gui, "edit");
        return true;
    }
}