class.ilMemberViewGUI.php

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<?php

class ilMemberViewGUI
{
    public static function showMemberViewSwitch(int $a_ref_id): bool
    {
        global $DIC;

        $ilAccess = $DIC->access();
        $ilCtrl = $DIC->ctrl();

        $settings = ilMemberViewSettings::getInstance();
        if (!$settings->isEnabled()) {
            return false;
        }
        $tree = $DIC->repositoryTree();
        $lng = $DIC->language();
        $ilToolbar = $DIC->toolbar();
        $ui = $DIC->ui();
        $ilTab = $DIC->tabs();

        // No course or group in path => aborting
        if (!$tree->checkForParentType($a_ref_id, 'crs') &&
            !$tree->checkForParentType($a_ref_id, 'grp')) {
            return false;
        }

        // TODO: check edit_permission

        $type = ilObject::_lookupType(ilObject::_lookupObjId($a_ref_id));

        $isCourseOrGroupContentTab =
            (
                $ilCtrl->getCmd() === 'view' &&
                ($type === 'crs' || $type === 'grp')
            ) || (
                $ilCtrl->getCmd() === '' &&
                $type === 'crs' &&
                strtolower($ilCtrl->getCmdClass()) === 'ilobjcoursegui'
            ) || (
                $ilCtrl->getCmd() === '' &&
                $type === 'grp' &&
                strtolower($ilCtrl->getCmdClass()) === 'ilobjgroupgui'
            );

        if (
            $isCourseOrGroupContentTab &&
            $ilAccess->checkAccess('write', '', $a_ref_id)
        ) {
            $ilCtrl->setParameterByClass("ilrepositorygui", "ref_id", $a_ref_id);
            $ilCtrl->setParameterByClass("ilrepositorygui", "mv", "1");
            $ilCtrl->setParameterByClass("ilrepositorygui", "set_mode", "flat");
            $ilToolbar->addComponent(
                $ui->factory()->button()->standard(
                    $lng->txt('mem_view_activate'),
                    $ilCtrl->getLinkTargetByClass("ilrepositorygui", "")
                )
            );
            $ilCtrl->clearParametersByClass("ilrepositorygui");
            return true;
        }
        return true;
    }
}