class.ilNavigationHistoryGUI.php

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<?php

/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilNavigationHistoryGUI
{
    protected $ctrl;

    protected $nav_history;

    protected $lng;


    private $items;

    public function __construct()
    {
        global $DIC;

        $this->ctrl = $DIC->ctrl();
        $this->nav_history = $DIC["ilNavigationHistory"];
        $this->lng = $DIC->language();
    }

    public function executeCommand()
    {
        $ilCtrl = $this->ctrl;

        $next_class = $ilCtrl->getNextClass();
        $cmd = $ilCtrl->getCmd();

        switch ($next_class) {
            default:
                $this->$cmd();
                break;
        }
    }

    public function getHTML()
    {
        $ilNavigationHistory = $this->nav_history;
        $lng = $this->lng;
        
        include_once("./Services/UIComponent/AdvancedSelectionList/classes/class.ilAdvancedSelectionListGUI.php");
        $selection = new ilAdvancedSelectionListGUI();
        $selection->setFormSelectMode(
            "url_ref_id",
            "ilNavHistorySelect",
            true,
            "goto.php?target=navi_request",
            "ilNavHistory",
            "ilNavHistoryForm",
            "_top",
            $lng->txt("go"),
            "ilNavHistorySubmit"
        );
        $selection->setListTitle($lng->txt("last_visited"));
        $selection->setId("lastvisited");
        $selection->setSelectionHeaderClass("MMInactive");
        $selection->setHeaderIcon(ilAdvancedSelectionListGUI::NO_ICON);
        $selection->setItemLinkClass("small");
        $selection->setUseImages(true);
        include_once("./Services/Accessibility/classes/class.ilAccessKey.php");
        $selection->setAccessKey(ilAccessKey::LAST_VISITED);
        
        $items = $ilNavigationHistory->getItems();
        //$sel_arr = array(0 => "-- ".$lng->txt("last_visited")." --");
        reset($items);
        $cnt = 0;
        foreach ($items as $k => $item) {
            if ($cnt++ > 20) {
                break;
            }
            if (!isset($item["ref_id"]) || !isset($_GET["ref_id"]) ||
                $item["ref_id"] != $_GET["ref_id"] || $k > 0) {                 // do not list current item
                $obj_id = ilObject::_lookupObjId($item["ref_id"]);
                $selection->addItem(
                    $item["title"],
                    $item["ref_id"],
                    $item["link"],
                    ilObject::_getIcon($obj_id, "tiny", $item["type"]),
                    $lng->txt("obj_" . $item["type"]),
                    "_top"
                );
            }
        }
        $html = $selection->getHTML();
        
        if ($html == "") {
            $selection->addItem(
                $lng->txt("no_items"),
                "",
                "#",
                "",
                "",
                "_top"
            );
            $selection->setUseImages(false);
            $html = $selection->getHTML();
        }
        return $html;
    }
    
    public function handleNavigationRequest()
    {
        $ilNavigationHistory = $this->nav_history;
        $ilCtrl = $this->ctrl;
        
        if ($_GET["target"] == "navi_request") {
            $items = $ilNavigationHistory->getItems();
            foreach ($items as $item) {
                if ($item["ref_id"] == $_POST["url_ref_id"]) {
                    ilUtil::redirect($item["link"]);
                }
            }
            reset($items);
            $item = current($items);
            if ($_POST["url_ref_id"] == 0 && $item["ref_id"] == $_GET["ref_id"]) {
                $item = next($items);           // omit current item
            }
            if ($_POST["url_ref_id"] == 0 && $item["link"] != "") {
                ilUtil::redirect($item["link"]);
            }
            
            $ilCtrl->setParameterByClass("ilrepositorygui", "ref_id", "");
            $ilCtrl->setParameterByClass("ilrepositorygui", "getlast", "true");
            $ilCtrl->redirectByClass("ilrepositorygui", "frameset");
        }
    }
    
    public function removeEntries()
    {
        $ilNavigationHistory = $this->nav_history;
        
        $ilNavigationHistory->deleteDBEntries();
        $ilNavigationHistory->deleteSessionEntries();
    }
}