class.ilSharedResourceGUI.php

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

class ilSharedResourceGUI
{
    protected $ctrl;

    protected $tpl;

    protected $main_menu;

    protected $locator;

    protected $user;

    protected $lng;

    protected $obj_definition;

    protected $tabs;

    protected $db;

    protected $node_id;
    protected $portfolio_id;
    protected $access_handler;

    public function __construct()
    {
        global $DIC;

        $this->ctrl = $DIC->ctrl();
        $this->tpl = $DIC["tpl"];
        $this->main_menu = $DIC["ilMainMenu"];
        $this->locator = $DIC["ilLocator"];
        $this->user = $DIC->user();
        $this->lng = $DIC->language();
        $this->obj_definition = $DIC["objDefinition"];
        $this->tabs = $DIC->tabs();
        $this->db = $DIC->database();
        $ilCtrl = $DIC->ctrl();
        
        $ilCtrl->saveParameter($this, "wsp_id");
        $ilCtrl->saveParameter($this, "prt_id");
        $this->node_id = (int) $_GET["wsp_id"];
        $this->portfolio_id = (int) $_GET["prt_id"];
    }
    
    public function executeCommand()
    {
        $ilCtrl = $this->ctrl;
        $tpl = $this->tpl;
        $ilMainMenu = $this->main_menu;
        $ilLocator = $this->locator;
        $ilUser = $this->user;
        $lng = $this->lng;
        
        $next_class = $ilCtrl->getNextClass($this);
        $cmd = $ilCtrl->getCmd();
        
        $tpl->getStandardTemplate();
        
        // #8509
        $ilMainMenu->setActive("desktop");
        
        // #12096
        if ($ilUser->getId() != ANONYMOUS_USER_ID &&
            $next_class &&
            !in_array($next_class, array("ilobjbloggui", "ilobjportfoliogui"))) {
            include_once "Services/PersonalWorkspace/classes/class.ilWorkspaceAccessHandler.php";
            include_once "Services/PersonalWorkspace/classes/class.ilWorkspaceTree.php";
            $tree = new ilWorkspaceTree($ilUser->getId());
            $access_handler = new ilWorkspaceAccessHandler($tree);
            $owner_id = $tree->lookupOwner($this->node_id);
            $obj_id = $tree->lookupObjectId($this->node_id);
            
            $lng->loadLanguageModule("wsp");

            // see ilPersonalWorkspaceGUI
            if ($owner_id != $ilUser->getId()) {
                $ilCtrl->setParameterByClass("ilpersonaldesktopgui", "dsh", $owner_id);
                $link = $ilCtrl->getLinkTargetByClass("ilpersonaldesktopgui", "jumptoworkspace");
                $ilLocator->addItem($lng->txt("wsp_tab_shared"), $link);

                include_once "Services/User/classes/class.ilUserUtil.php";
                $ilLocator->addItem(ilUserUtil::getNamePresentation($owner_id), $link);
            } else {
                $link = $ilCtrl->getLinkTargetByClass("ilpersonaldesktopgui", "jumptoworkspace");
                $ilLocator->addItem($lng->txt("wsp_tab_personal"), $link);
            }
            
            $link = $access_handler->getGotoLink($this->node_id, $obj_id);
            $ilLocator->addItem(ilObject::_lookupTitle($obj_id), $link);
            $tpl->setLocator($ilLocator);
        }
        
        switch ($next_class) {
            case "ilobjbloggui":
                include_once "Modules/Blog/classes/class.ilObjBlogGUI.php";
                $bgui = new ilObjBlogGUI($this->node_id, ilObject2GUI::WORKSPACE_NODE_ID);
                $ilCtrl->forwardCommand($bgui);
                break;
            
            case "ilobjfilegui":
                include_once "Modules/File/classes/class.ilObjFileGUI.php";
                $fgui = new ilObjFileGUI($this->node_id, ilObject2GUI::WORKSPACE_NODE_ID);
                $ilCtrl->forwardCommand($fgui);
                break;
            
            case "ilobjtestverificationgui":
                include_once "Modules/Test/classes/class.ilObjTestVerificationGUI.php";
                $tgui = new ilObjTestVerificationGUI($this->node_id, ilObject2GUI::WORKSPACE_NODE_ID);
                $ilCtrl->forwardCommand($tgui);
                break;
            
            case "ilobjexerciseverificationgui":
                include_once "Modules/Exercise/classes/class.ilObjExerciseVerificationGUI.php";
                $egui = new ilObjExerciseVerificationGUI($this->node_id, ilObject2GUI::WORKSPACE_NODE_ID);
                $ilCtrl->forwardCommand($egui);
                break;
            
            case "ilobjlinkresourcegui":
                include_once "Modules/WebResource/classes/class.ilObjLinkResourceGUI.php";
                $lgui = new ilObjLinkResourceGUI($this->node_id, ilObject2GUI::WORKSPACE_NODE_ID);
                $ilCtrl->forwardCommand($lgui);
                break;
            
            case "ilobjportfoliogui":
                include_once "Modules/Portfolio/classes/class.ilObjPortfolioGUI.php";
                $pgui = new ilObjPortfolioGUI($this->portfolio_id, ilObject2GUI::PORTFOLIO_OBJECT_ID);
                $ilCtrl->forwardCommand($pgui);
                break;
            
            default:
                if (!$cmd) {
                    $cmd = "process";
                }
                $this->$cmd();
        }
        
        $tpl->show();
    }
    
    protected function process()
    {
        if (!$this->node_id && !$this->portfolio_id) {
            exit("invalid call");
        }
            
        // if already logged in, we need to re-check for public password
        if ($this->node_id) {
            if (!self::hasAccess($this->node_id)) {
                exit("no permission");
            }
            $this->redirectToResource($this->node_id);
        } else {
            if (!self::hasAccess($this->portfolio_id, true)) {
                exit("no permission");
            }
            $this->redirectToResource($this->portfolio_id, true);
        }
    }
    
    public static function hasAccess($a_node_id, $a_is_portfolio = false)
    {
        global $DIC;

        $ilUser = $DIC->user();
        $ilSetting = $DIC->settings();
    
        // if we have current user - check with normal access handler
        if ($ilUser->getId() != ANONYMOUS_USER_ID) {
            if (!$a_is_portfolio) {
                include_once "Services/PersonalWorkspace/classes/class.ilWorkspaceAccessHandler.php";
                include_once "Services/PersonalWorkspace/classes/class.ilWorkspaceTree.php";
                $tree = new ilWorkspaceTree($ilUser->getId());
                $access_handler = new ilWorkspaceAccessHandler($tree);
            } else {
                include_once "Modules/Portfolio/classes/class.ilPortfolioAccessHandler.php";
                $access_handler = new ilPortfolioAccessHandler();
            }
            if ($access_handler->checkAccess("read", "", $a_node_id)) {
                return true;
            }
        }
        
        // not logged in yet or no read access
        include_once "Services/PersonalWorkspace/classes/class.ilWorkspaceAccessGUI.php";
            
        if (!$a_is_portfolio) {
            include_once "Services/PersonalWorkspace/classes/class.ilWorkspaceAccessHandler.php";
            $shared = ilWorkspaceAccessHandler::_getPermissions($a_node_id);
        } else {
            // #12059
            if (!$ilSetting->get('user_portfolios')) {
                return false;
            }
            
            // #12039
            include_once "Modules/Portfolio/classes/class.ilObjPortfolio.php";
            $prtf = new ilObjPortfolio($a_node_id, false);
            if (!$prtf->isOnline()) {
                return false;
            }
                        
            include_once "Modules/Portfolio/classes/class.ilPortfolioAccessHandler.php";
            $shared = ilPortfolioAccessHandler::_getPermissions($a_node_id);
        }
        
        // object is "public"
        if (in_array(ilWorkspaceAccessGUI::PERMISSION_ALL, $shared)) {
            return true;
        }

        // password protected
        if (in_array(ilWorkspaceAccessGUI::PERMISSION_ALL_PASSWORD, $shared)) {
            if (!$a_is_portfolio) {
                ilUtil::redirect("ilias.php?baseClass=ilSharedResourceGUI&cmd=passwordForm&wsp_id=" . $a_node_id);
            } else {
                ilUtil::redirect("ilias.php?baseClass=ilSharedResourceGUI&cmd=passwordForm&prt_id=" . $a_node_id);
            }
        }
        
        return false;
    }
    
    protected function redirectToResource($a_node_id, $a_is_portfolio = false)
    {
        $ilCtrl = $this->ctrl;
        $objDefinition = $this->obj_definition;
                
        if (!$a_is_portfolio) {
            include_once "Services/PersonalWorkspace/classes/class.ilWorkspaceAccessHandler.php";
            $object_data = ilWorkspaceAccessHandler::getObjectDataFromNode($a_node_id);
            if (!$object_data["obj_id"]) {
                exit("invalid object");
            }
        } else {
            if (!ilObject::_lookupType($a_node_id, false)) {
                exit("invalid object");
            }
            $object_data["obj_id"] = $a_node_id;
            $object_data["type"] = "prtf";
        }
        
        $class = $objDefinition->getClassName($object_data["type"]);
        $gui = "ilobj" . $class . "gui";
        
        switch ($object_data["type"]) {
            case "blog":
                $ilCtrl->setParameterByClass($gui, "wsp_id", $a_node_id);
                $ilCtrl->setParameterByClass($gui, "gtp", (int) $_GET["gtp"]);
                $ilCtrl->redirectByClass($gui, "preview");
                
                // no break
            case "tstv":
            case "excv":
            case "crsv":
            case "scov":
                $ilCtrl->setParameterByClass($gui, "wsp_id", $a_node_id);
                $ilCtrl->redirectByClass($gui, "deliver");
                
                // no break
            case "file":
            case "webr":
                $ilCtrl->setParameterByClass($gui, "wsp_id", $a_node_id);
                $ilCtrl->redirectByClass($gui);
                
                // no break
            case "prtf":
                $ilCtrl->setParameterByClass($gui, "prt_id", $a_node_id);
                $ilCtrl->setParameterByClass($gui, "gtp", (int) $_GET["gtp"]);
                if ($_GET["back_url"]) {
                    $ilCtrl->setParameterByClass($gui, "back_url", rawurlencode($_GET["back_url"]));
                }
                $ilCtrl->redirectByClass($gui, "preview");
                
                // no break
            default:
                exit("invalid object type");
        }
    }
    
    protected function passwordForm($form = null)
    {
        $tpl = $this->tpl;
        $lng = $this->lng;
        
        $lng->loadLanguageModule("wsp");
        
        $tpl->setTitle($lng->txt("wsp_password_protected_resource"));
        $tpl->setDescription($lng->txt("wsp_password_protected_resource_info"));
        
        if (!$form) {
            $form = $this->initPasswordForm();
        }
    
        $tpl->setContent($form->getHTML());
    }
    
    protected function initPasswordForm()
    {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        $ilUser = $this->user;
        $ilTabs = $this->tabs;
        
        if ($this->node_id) {
            include_once "Services/PersonalWorkspace/classes/class.ilWorkspaceAccessHandler.php";
            $object_data = ilWorkspaceAccessHandler::getObjectDataFromNode($this->node_id);
        } else {
            $object_data["title"] = ilObject::_lookupTitle($this->portfolio_id);
        }
        
        include_once "Services/Form/classes/class.ilPropertyFormGUI.php";
        $form = new ilPropertyFormGUI();
        $form->setFormAction($ilCtrl->getFormAction($this, "checkPassword"));
        $form->setTitle($lng->txt("wsp_password_for") . ": " . $object_data["title"]);
        
        $password = new ilPasswordInputGUI($lng->txt("password"), "password");
        $password->setRetype(false);
        $password->setRequired(true);
        $password->setSkipSyntaxCheck(true); // #17757
        $form->addItem($password);
        
        $form->addCommandButton("checkPassword", $lng->txt("submit"));
        
        if ($ilUser->getId() && $ilUser->getId() != ANONYMOUS_USER_ID) {
            $ilTabs->setBackTarget($lng->txt("back"), $ilCtrl->getLinkTarget($this, "cancelPassword"));
            $form->addCommandButton("cancelPassword", $lng->txt("cancel"));
        }
        
        return $form;
    }
    
    protected function cancelPassword()
    {
        $ilUser = $this->user;
        
        if ($ilUser->getId() && $ilUser->getId() != ANONYMOUS_USER_ID) {
            if ($this->node_id) {
                include_once "Services/PersonalWorkspace/classes/class.ilWorkspaceAccessHandler.php";
                include_once "Services/PersonalWorkspace/classes/class.ilWorkspaceTree.php";
                $tree = new ilWorkspaceTree($ilUser->getId());
                $owner = $tree->lookupOwner($this->node_id);
                ilUtil::redirect("ilias.php?baseClass=ilPersonalDesktopGUI&cmd=jumpToWorkspace&dsh=" . $owner);
            } else {
                include_once "Modules/Portfolio/classes/class.ilObjPortfolio.php";
                $prtf = new ilObjPortfolio($this->portfolio_id, false);
                $owner = $prtf->getOwner();
                ilUtil::redirect("ilias.php?baseClass=ilPersonalDesktopGUI&cmd=jumpToPortfolio&dsh=" . $owner);
            }
        }
    }
    
    protected function checkPassword()
    {
        $ilDB = $this->db;
        $lng = $this->lng;
        
        $lng->loadLanguageModule("wsp");
         
        $form = $this->initPasswordForm();
        if ($form->checkInput()) {
            $input = md5($form->getInput("password"));
            if ($this->node_id) {
                include_once "Services/PersonalWorkspace/classes/class.ilWorkspaceAccessHandler.php";
                $password = ilWorkspaceAccessHandler::getSharedNodePassword($this->node_id);
            } else {
                include_once "Modules/Portfolio/classes/class.ilPortfolioAccessHandler.php";
                $password = ilPortfolioAccessHandler::getSharedNodePassword($this->portfolio_id);
            }
            if ($input == $password) {
                if ($this->node_id) {
                    ilWorkspaceAccessHandler::keepSharedSessionPassword($this->node_id, $input);
                    $this->redirectToResource($this->node_id);
                } else {
                    ilPortfolioAccessHandler::keepSharedSessionPassword($this->portfolio_id, $input);
                    $this->redirectToResource($this->portfolio_id, true);
                }
            } else {
                $item = $form->getItemByPostVar("password");
                $item->setAlert($lng->txt("wsp_invalid_password"));
                ilUtil::sendFailure($lng->txt("form_input_not_valid"));
            }
        }
        
        $form->setValuesByPost();
        $this->passwordForm($form);
    }
}