class.ilNewsForContextBlockGUI.php

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<?php

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

include_once("Services/Block/classes/class.ilBlockGUI.php");

class ilNewsForContextBlockGUI extends ilBlockGUI
{
    const OBJECTS_WITH_NEWS_SUBTAB = ["category", "course", "group", "forum"];

    protected $help;

    protected $settings;

    protected $tabs;

    public static $block_type = "news";
    public static $st_data;

    protected $obj_definition;
    
    public function __construct()
    {
        global $DIC;

        $this->ctrl = $DIC->ctrl();
        $this->lng = $DIC->language();
        $this->user = $DIC->user();
        $this->help = $DIC["ilHelp"];
        $this->access = $DIC->access();
        $this->settings = $DIC->settings();
        $this->tabs = $DIC->tabs();
        $this->obj_definition = $DIC["objDefinition"];
        $this->ui = $DIC->ui();

        $ilCtrl = $DIC->ctrl();
        $lng = $DIC->language();
        $ilUser = $DIC->user();
        $ilHelp = $DIC["ilHelp"];

        parent::__construct();
        
        $lng->loadLanguageModule("news");
        $ilHelp->addHelpSection("news_block");
        
        include_once("./Services/News/classes/class.ilNewsItem.php");
        $this->setBlockId($ilCtrl->getContextObjId());
        $this->setLimit(5);
        $this->setAvailableDetailLevels(3);
        $this->setEnableNumInfo(true);
        
        $this->dynamic = false;
        include_once("./Services/News/classes/class.ilNewsCache.php");
        $this->acache = new ilNewsCache();
        $cres = unserialize($this->acache->getEntry($ilUser->getId() . ":" . $_GET["ref_id"]));
        $this->cache_hit = false;

        if ($this->acache->getLastAccessStatus() == "hit" && is_array($cres)) {
            self::$st_data = ilNewsItem::prepareNewsDataFromCache($cres);
            $this->cache_hit = true;
        }
        if ($this->getDynamic() && !$this->cache_hit) {
            $this->dynamic = true;
            $data = array();
        } elseif ($this->getCurrentDetailLevel() > 0) {
            if (!empty(self::$st_data)) {
                $data = self::$st_data;
            } else {
                $data = $this->getNewsData();
                self::$st_data = $data;
            }
        } else {
            $data = array();
        }

        $this->setTitle($lng->txt("news_internal_news"));
        $this->setRowTemplate("tpl.block_row_news_for_context.html", "Services/News");
        $this->setData($data);
        $this->allow_moving = false;
        $this->handleView();
    }
    
    public function getNewsData()
    {
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;

        include_once("./Services/News/classes/class.ilNewsCache.php");
        $this->acache = new ilNewsCache();
        /*              $cres = $this->acache->getEntry($ilUser->getId().":".$_GET["ref_id"]);
                if ($this->acache->getLastAccessStatus() == "hit" && false)
                {
                    $news_data = unserialize($cres);
                }
                else
                {*/
        $news_item = new ilNewsItem();
        $news_item->setContextObjId($ilCtrl->getContextObjId());
        $news_item->setContextObjType($ilCtrl->getContextObjType());
            
        // workaround, better: reduce constructor and introduce
        //$prevent_aggregation = $this->getProperty("prevent_aggregation");
        $prevent_aggregation = true;
        if ($ilCtrl->getContextObjType() != "frm") {
            $forum_grouping = true;
        } else {
            $forum_grouping = false;
        }
    
            
        $news_data = $news_item->getNewsForRefId(
            $_GET["ref_id"],
            false,
            false,
            0,
            $prevent_aggregation,
            $forum_grouping
        );

        $this->acache->storeEntry(
            $ilUser->getId() . ":" . $_GET["ref_id"],
            serialize($news_data)
        );

        //              }
        //var_dump($news_data);
        return $news_data;
    }

    public function getBlockType() : string
    {
        return self::$block_type;
    }

    protected function isRepositoryObject() : bool
    {
        return false;
    }
    
    public static function getScreenMode()
    {
        global $DIC;

        $ilCtrl = $DIC->ctrl();
        
        if ($ilCtrl->getCmdClass() == "ilnewsitemgui") {
            return IL_SCREEN_FULL;
        }
        
        switch ($ilCtrl->getCmd()) {
            case "showNews":
            case "showFeedUrl":
                return IL_SCREEN_CENTER;
                break;
                
            case "editSettings":
            case "saveSettings":
                return IL_SCREEN_FULL;
                break;
            
            default:
                return IL_SCREEN_SIDE;
                break;
        }
    }

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

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

        switch ($next_class) {
            case "ilnewsitemgui":
                include_once("./Services/News/classes/class.ilNewsItemGUI.php");
                $news_item_gui = new ilNewsItemGUI();
                $news_item_gui->setEnableEdit($this->getEnableEdit());
                $html = $ilCtrl->forwardCommand($news_item_gui);
                return $html;
                
            default:
                return $this->$cmd();
        }
    }

    public function setEnableEdit($a_enable_edit = 0)
    {
        $this->enable_edit = $a_enable_edit;
    }

    public function getEnableEdit()
    {
        return $this->enable_edit;
    }

    public function fillDataSection()
    {
        if ($this->dynamic) {
            $this->setDataSection($this->getDynamicReload());
        } elseif ($this->getCurrentDetailLevel() > 1 && count($this->getData()) > 0) {
            parent::fillDataSection();
        } else {
            $this->setDataSection($this->getOverview());
        }
    }

    public function getHTML()
    {
        global $DIC;

        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        $ilUser = $this->user;
        
        $news_set = new ilSetting("news");
        $enable_internal_rss = $news_set->get("enable_rss_for_internal");

        $hide_block = ilBlockSetting::_lookup(
            $this->getBlockType(),
            "hide_news_block",
            0,
            $this->block_id
        );
        if ($hide_block) {
            $this->setFooterInfo($lng->txt("news_hidden_news_block"));
        }

        if ($this->getProperty("title") != "") {
            $this->setTitle($this->getProperty("title"));
        }

        $public_feed = ilBlockSetting::_lookup(
            $this->getBlockType(),
            "public_feed",
            0,
            $this->block_id
        );
        if ($public_feed) {
            if ($enable_internal_rss) {
                include_once("./Services/News/classes/class.ilRSSButtonGUI.php");
                $this->addBlockCommand(
                    ILIAS_HTTP_PATH . "/feed.php?client_id=" . rawurlencode(CLIENT_ID) . "&" .
                        "ref_id=" . $_GET["ref_id"],
                    $lng->txt("news_feed_url"),
                    "",
                    "",
                    true,
                    false,
                    ilRSSButtonGUI::get(ilRSSButtonGUI::ICON_RSS)
                );
            }
        }

        /*      Subscription Concept is abandonded for now (Alex)
                // subscribe/unsibscribe link
                include_once("./Services/News/classes/class.ilNewsSubscription.php");
                if (ilNewsSubscription::_hasSubscribed($_GET["ref_id"], $ilUser->getId()))
                {
                    $this->addBlockCommand(
                        $ilCtrl->getLinkTarget($this, "unsubscribeNews"),
                        $lng->txt("news_unsubscribe"));
                }
                else
                {
                    $this->addBlockCommand(
                        $ilCtrl->getLinkTarget($this, "subscribeNews"),
                        $lng->txt("news_subscribe"));
                }
        */

        // add edit commands
        if ($this->getEnableEdit()) {
            $this->addBlockCommand(
                $ilCtrl->getLinkTargetByClass("ilnewsitemgui", "editNews"),
                $lng->txt("edit")
            );

            $ilCtrl->setParameter($this, "add_mode", "block");
            $this->addBlockCommand(
                $ilCtrl->getLinkTargetByClass("ilnewsitemgui", "createNewsItem"),
                $lng->txt("add")
            );
            $ilCtrl->setParameter($this, "add_mode", "");
        }

        if ($this->getProperty("settings") == true) {
            $ref_id = $_GET["ref_id"];
            $obj_def = $DIC["objDefinition"];
            $obj_id = ilObject::_lookupObjectId($ref_id);
            $obj_type = ilObject::_lookupType($ref_id, true);
            $obj_class = strtolower($obj_def->getClassName($obj_type));
            $parent_gui = "ilobj" . $obj_class . "gui";

            $ilCtrl->setParameterByClass("ilcontainernewssettingsgui", "ref_id", $ref_id);

            if (in_array($obj_class, ilNewsForContextBlockGUI::OBJECTS_WITH_NEWS_SUBTAB)) {
                $this->addBlockCommand(
                    $ilCtrl->getLinkTargetByClass(array("ilrepositorygui", $parent_gui, "ilcontainernewssettingsgui"), "show"),
                    $lng->txt("settings")
                );
            } else {
                $this->addBlockCommand(
                    $ilCtrl->getLinkTarget($this, "editSettings"),
                    $lng->txt("settings")
                );
            }
        }
        
        // do not display hidden repository news blocks for users
        // who do not have write permission
        if (!$this->getEnableEdit() && $this->getRepositoryMode() &&
            ilBlockSetting::_lookup(
                $this->getBlockType(),
                "hide_news_block",
                0,
                $this->block_id
            )) {
            return "";
        }

        // do not display empty news blocks for users
        // who do not have write permission
        if (count($this->getData()) == 0 && !$this->getEnableEdit() &&
            $this->getRepositoryMode() && !$this->dynamic
            && (!$news_set->get("enable_rss_for_internal") ||
                !ilBlockSetting::_lookup(
                    $this->getBlockType(),
                    "public_feed",
                    0,
                    $this->block_id
                ))) {
            return "";
        }

        $en = "";
        if ($ilUser->getPref("il_feed_js") == "n") {
            //                  $en = getJSEnabler();
        }

        return parent::getHTML() . $en;
    }

    public function handleView()
    {
        $ilUser = $this->user;
        
        include_once("Services/Block/classes/class.ilBlockSetting.php");
        $this->view = ilBlockSetting::_lookup(
            $this->getBlockType(),
            "view",
            $ilUser->getId(),
            $this->block_id
        );

        // check whether notices and messages exist
        $got_notices = $got_messages = false;
        foreach ($this->data as $row) {
            if ($row["priority"] == 0) {
                $got_notices = true;
            }
            if ($row["priority"] == 1) {
                $got_messages = true;
            }
        }
        $this->show_view_selection = false;

        if ($got_notices && $got_messages) {
            $this->show_view_selection = true;
        } elseif ($got_notices) {
            $this->view = "";
        }
        
        // remove notifications if hidden
/*
        if (($this->view == "hide_notifications") && $this->show_view_selection)
        {
            $rset = array();
            foreach($this->data as $k => $row)
            {
                if ($row["priority"] == 1)
                {
                    $rset[$k] = $row;
                }
            }
            $this->data = $rset;
        }
*/
    }
    
    public function fillRow($news)
    {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        $obj_definition = $this->obj_definition;

        if ($this->getCurrentDetailLevel() > 2) {
            $this->tpl->setCurrentBlock("long");
            //$this->tpl->setVariable("VAL_CONTENT", $news["content"]);
            $this->tpl->setVariable(
                "VAL_CREATION_DATE",
                ilDatePresentation::formatDate(new ilDateTime($news["creation_date"], IL_CAL_DATETIME))
            );
            $this->tpl->parseCurrentBlock();
        }

        // title image type
        if ($news["ref_id"] > 0) {
            if ($news["agg_ref_id"] > 0) {
                $obj_id = ilObject::_lookupObjId($news["agg_ref_id"]);
                $type = ilObject::_lookupType($obj_id);
                $context_ref = $news["agg_ref_id"];
            } else {
                $obj_id = $news["context_obj_id"];
                $type = $news["context_obj_type"];
                $context_ref = $news["ref_id"];
            }
            
            $lang_type = in_array($type, array("sahs", "lm", "htlm"))
                ? "lres"
                : "obj_" . $type;

            $type_txt = ($obj_definition->isPlugin($news["context_obj_type"]))
                ? ilObjectPlugin::lookupTxtById($news["context_obj_type"], $lang_type)
                : $lng->txt($lang_type);

            $this->tpl->setCurrentBlock("news_context");
            $this->tpl->setVariable("TYPE", $type_txt);
            $this->tpl->setVariable(
                "IMG_TYPE",
                ilObject::_getIcon($obj_id, "tiny", $type)
            );
            $this->tpl->setVariable(
                "TITLE",
                ilUtil::shortenWords(ilObject::_lookupTitle($obj_id))
            );
            if ($news["user_read"] > 0) {
                $this->tpl->setVariable("TITLE_CLASS", 'class="light"');
            }
            
            $this->tpl->parseCurrentBlock();
            $ilCtrl->setParameter($this, "news_context", $context_ref);
        } else {
            $ilCtrl->setParameter($this, "news_context", "");
        }

        // title
        $this->tpl->setVariable(
            "VAL_TITLE",
            ilUtil::shortenWords(ilNewsItem::determineNewsTitle(
                $news["context_obj_type"],
                $news["title"],
                $news["content_is_lang_var"],
                $news["agg_ref_id"],
                $news["aggregation"]
            ))
        );
        
        
        if ($news["user_read"] > 0) {
            $this->tpl->setVariable("A_CLASS", 'class="light"');
        }
        
        $ilCtrl->setParameter($this, "news_id", $news["id"]);
        $this->tpl->setVariable(
            "HREF_SHOW",
            $ilCtrl->getLinkTarget($this, "showNews")
        );
        $ilCtrl->clearParameters($this);
    }

    public function getOverview()
    {
        $ilUser = $this->user;
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
                
        return '<div class="small">' . ((int) count($this->getData())) . " " . $lng->txt("news_news_items") . "</div>";
    }

    public function showNews()
    {
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;
        $ilAccess = $this->access;
        
        // workaround for dynamic mode (if cache is disabled, showNews has no data)
        if (empty(self::$st_data)) {
            $this->setData($this->getNewsData());
        }
        
        $news_set = new ilSetting("news");
        $enable_internal_rss = $news_set->get("enable_rss_for_internal");

        include_once("./Services/News/classes/class.ilNewsItem.php");
        $news = new ilNewsItem((int) $_GET["news_id"]);
        
        $tpl = new ilTemplate("tpl.show_news.html", true, true, "Services/News");

        // get current item in data set
        $previous = $next = "";
        reset($this->data);
        $c = current($this->data);
        $curr_cnt = 1;

        while ($c["id"] > 0 &&
             $c["id"] != $_GET["news_id"]) {
            $previous = $c;
            $c = next($this->data);
            $curr_cnt++;
        }

        if (!is_array($c) && is_object($news) && $news->getId() > 0
            && ilNewsItem::_lookupContextObjId($news->getId()) != $ilCtrl->getContextObjId()) {
            throw new ilException("News ID does not match object context.");
        }


        // collect news items to show
        $news_list = array();
        if (is_array($c["aggregation"])) {      // we have an aggregation
            $news_list[] = array("ref_id" => $c["agg_ref_id"],
                "agg_ref_id" => $c["agg_ref_id"],
                "aggregation" => $c["aggregation"],
                "user_id" => "",
                "content_type" => "text",
                "mob_id" => 0,
                "visibility" => "",
                "content" => "",
                "content_long" => "",
                "update_date" => $news->getUpdateDate(),
                "creation_date" => "",
                "content_is_lang_var" => false,
                "loc_context" => $_GET["news_context"],
                "context_obj_type" => $news->getContextObjType(),
                "title" => "");

            foreach ($c["aggregation"] as $c_item) {
                ilNewsItem::_setRead($ilUser->getId(), $c_item["id"]);
                $c_item["loc_context"] = $c_item["ref_id"];
                $c_item["loc_stop"] = $_GET["news_context"];
                $news_list[] = $c_item;
            }
        } else {                                                                // no aggregation, simple news item
            $news_list[] = array(
                "id" => $news->getId(),
                "ref_id" => $_GET["news_context"],
                "user_id" => $news->getUserId(),
                "content_type" => $news->getContentType(),
                "mob_id" => $news->getMobId(),
                "visibility" => $news->getVisibility(),
                "priority" => $news->getPriority(),
                "content" => $news->getContent(),
                "content_long" => $news->getContentLong(),
                "update_date" => $news->getUpdateDate(),
                "creation_date" => $news->getCreationDate(),
                "context_sub_obj_type" => $news->getContextSubObjType(),
                "context_obj_type" => $news->getContextObjType(),
                "context_sub_obj_id" => $news->getContextSubObjId(),
                "content_is_lang_var" => $news->getContentIsLangVar(),
                "content_text_is_lang_var" => $news->getContentTextIsLangVar(),
                "loc_context" => $_GET["news_context"],
                "title" => $news->getTitle());
            ilNewsItem::_setRead($ilUser->getId(), $_GET["news_id"]);
        }

        $row_css = "";
        $cache_deleted = false;
        foreach ($news_list as $item) {
            $row_css = ($row_css != "tblrow1")
                    ? "tblrow1"
                    : "tblrow2";

            if ($item["ref_id"] > 0 && !$ilAccess->checkAccess("read", "", $item["ref_id"])) {
                $tpl->setCurrentBlock("content");
                $tpl->setVariable("VAL_CONTENT", $lng->txt("news_sorry_not_accessible_anymore"));
                $tpl->parseCurrentBlock();
                $tpl->setCurrentBlock("item");
                $tpl->setVariable("ITEM_ROW_CSS", $row_css);
                $tpl->parseCurrentBlock();
                if (!$cache_deleted) {
                    $this->acache->deleteEntry($ilUser->getId() . ":" . $_GET["ref_id"]);
                    $cache_deleted = true;
                }
                continue;
            }

            // user
            if ($item["user_id"] > 0 && ilObject::_exists($item["user_id"])) {
                // get login
                if (ilObjUser::_exists($item["user_id"])) {
                    $user = new ilObjUser($item["user_id"]);
                    $displayname = $user->getLogin();
                } else {
                    // this should actually not happen, since news entries
                    // should be deleted when the user is going to be removed
                    $displayname = "&lt;" . strtolower($lng->txt("deleted")) . "&gt;";
                }
            
                $tpl->setCurrentBlock("user_info");
                $tpl->setVariable("VAL_AUTHOR", $displayname);
                $tpl->setVariable("TXT_AUTHOR", $lng->txt("author"));
                $tpl->parseCurrentBlock();
            }
                        
            // media player
            $ui_renderer = $this->ui->renderer();
            $ui_factory = $this->ui->factory();
            $this->ui->factory();
            if ($item["mob_id"] > 0 && ilObject::_exists($item["mob_id"])) {
                $media_path = $this->getMediaPath($item["mob_id"]);
                $mime = ilObjMediaObject::getMimeType($media_path);
                if (in_array($mime, array("image/jpeg", "image/svg+xml", "image/gif", "image/png"))) {
                    $title = basename($media_path);
                    $html = $ui_renderer->render($ui_factory->image()->responsive($media_path, $title));
                } elseif (in_array($mime, array("audio/mpeg", "audio/ogg", "video/mp4", "video/x-flv", "video/webm"))) {
                    $mp = new ilMediaPlayerGUI();
                    $mp->setFile($media_path);
                    $mp->setDisplayHeight(200);
                    $html = $mp->getMediaPlayerHtml();
                } else {
                    // download?
                    $html = "";
                }


                $tpl->setCurrentBlock("player");
                $tpl->setVariable(
                    "PLAYER",
                    $html
                );
                $tpl->parseCurrentBlock();
            }
            
            // access
            if ($enable_internal_rss && $item["visibility"] != "") {
                $obj_id = ilObject::_lookupObjId($item["ref_id"]);
                $tpl->setCurrentBlock("access");
                $tpl->setVariable("TXT_ACCESS", $lng->txt("news_news_item_visibility"));
                if ($item["visibility"] == NEWS_PUBLIC ||
                    ($item["priority"] == 0 &&
                    ilBlockSetting::_lookup(
                        "news",
                        "public_notifications",
                        0,
                        $obj_id
                    ))) {
                    $tpl->setVariable("VAL_ACCESS", $lng->txt("news_visibility_public"));
                } else {
                    $tpl->setVariable("VAL_ACCESS", $lng->txt("news_visibility_users"));
                }
                $tpl->parseCurrentBlock();
            }

            // content
            include_once("./Services/News/classes/class.ilNewsRendererFactory.php");
            $renderer = ilNewsRendererFactory::getRenderer($item["context_obj_type"]);
            if (trim($item["content"]) != "") {         // content
                $it = new ilNewsItem($item["id"]);
                $renderer->setNewsItem($it, $item["ref_id"]);
                $tpl->setCurrentBlock("content");
                $tpl->setVariable("VAL_CONTENT", $renderer->getDetailContent());
                $tpl->parseCurrentBlock();
            }
            if ($item["update_date"] != $item["creation_date"]) {               // update date
                $tpl->setCurrentBlock("ni_update");
                $tpl->setVariable("TXT_LAST_UPDATE", $lng->txt("last_update"));
                $tpl->setVariable(
                    "VAL_LAST_UPDATE",
                    ilDatePresentation::formatDate(new ilDateTime($item["update_date"], IL_CAL_DATETIME))
                );
                $tpl->parseCurrentBlock();
            }
            
            // creation date
            if ($item["creation_date"] != "") {
                $tpl->setCurrentBlock("ni_update");
                $tpl->setVariable(
                    "VAL_CREATION_DATE",
                    ilDatePresentation::formatDate(new ilDateTime($item["creation_date"], IL_CAL_DATETIME))
                );
                $tpl->setVariable("TXT_CREATED", $lng->txt("created"));
                $tpl->parseCurrentBlock();
            }


            // context / title
            if ($_GET["news_context"] > 0) {
                //$obj_id = ilObject::_lookupObjId($_GET["news_context"]);
                $obj_id = ilObject::_lookupObjId($item["ref_id"]);
                $obj_type = ilObject::_lookupType($obj_id);
                $obj_title = ilObject::_lookupTitle($obj_id);
                
                // file hack, not nice
                if ($obj_type == "file") {
                    $ilCtrl->setParameterByClass("ilrepositorygui", "ref_id", $item["ref_id"]);
                    $url = $ilCtrl->getLinkTargetByClass("ilrepositorygui", "sendfile");
                    $ilCtrl->setParameterByClass("ilrepositorygui", "ref_id", $_GET["ref_id"]);
                    
                    include_once "Services/UIComponent/Button/classes/class.ilLinkButton.php";
                    $button = ilLinkButton::getInstance();
                    $button->setUrl($url);
                    $button->setCaption("download");
                    
                    $tpl->setCurrentBlock("download");
                    $tpl->setVariable("BUTTON_DOWNLOAD", $button->render());
                    $tpl->parseCurrentBlock();
                }
                
                // forum hack, not nice
                $add = "";
                if ($obj_type == "frm" && $item["context_sub_obj_type"] == "pos"
                    && $item["context_sub_obj_id"] > 0) {
                    include_once("./Modules/Forum/classes/class.ilObjForumAccess.php");
                    $pos = $item["context_sub_obj_id"];
                    $thread = ilObjForumAccess::_getThreadForPosting($pos);
                    if ($thread > 0) {
                        $add = "_" . $thread . "_" . $pos;
                    }
                }

                // wiki hack, not nice
                if ($obj_type == "wiki" && $item["context_sub_obj_type"] == "wpg"
                    && $item["context_sub_obj_id"] > 0) {
                    include_once("./Modules/Wiki/classes/class.ilWikiPage.php");
                    $wptitle = ilWikiPage::lookupTitle($item["context_sub_obj_id"]);
                    if ($wptitle != "") {
                        $add = "_" . ilWikiUtil::makeUrlTitle($wptitle);
                    }
                }

                $url_target = "./goto.php?client_id=" . rawurlencode(CLIENT_ID) . "&target=" .
                    $obj_type . "_" . $item["ref_id"] . $add;

                // lm page hack, not nice
                if (in_array($obj_type, array("lm")) && $item["context_sub_obj_type"] == "pg"
                    && $item["context_sub_obj_id"] > 0) {
                    $url_target = "./goto.php?client_id=" . rawurlencode(CLIENT_ID) . "&target=" .
                        "pg_" . $item["context_sub_obj_id"] . "_" . $item["ref_id"];
                }
                
                // blog posting hack, not nice
                if ($obj_type == "blog" && $item["context_sub_obj_type"] == "blp"
                    && $item["context_sub_obj_id"] > 0) {
                    $url_target = "./goto.php?client_id=" . rawurlencode(CLIENT_ID) . "&target=" .
                        "blog_" . $item["ref_id"] . "_" . $item["context_sub_obj_id"];
                }
    
                $context_opened = false;
                if ($item["loc_context"] != null && $item["loc_context"] != $item["loc_stop"]) {
                    $tpl->setCurrentBlock("context");
                    $context_opened = true;
                    $cont_loc = new ilLocatorGUI();
                    $cont_loc->addContextItems($item["loc_context"], true, $item["loc_stop"]);
                    $tpl->setVariable("CONTEXT_LOCATOR", $cont_loc->getHTML());
                }
                
                //var_dump($item);
                if ($item["no_context_title"] !== true) {
                    if (!$context_opened) {
                        $tpl->setCurrentBlock("context");
                    }
                    $tpl->setVariable("HREF_CONTEXT_TITLE", $url_target);
                    $tpl->setVariable("CONTEXT_TITLE", $obj_title);
                    $tpl->setVariable("IMG_CONTEXT_TITLE", ilObject::_getIcon($obj_id, "big", $obj_type));
                }
                if ($context_opened) {
                    $tpl->parseCurrentBlock();
                }
    
                $tpl->setVariable("HREF_TITLE", $url_target);
            }
            
            // title
            $tpl->setVariable(
                "VAL_TITLE",
                ilNewsItem::determineNewsTitle(
                    $item["context_obj_type"],
                    $item["title"],
                    $item["content_is_lang_var"],
                    $item["agg_ref_id"],
                    $item["aggregation"]
                )
            );
            

            $tpl->setCurrentBlock("item");
            $tpl->setVariable("ITEM_ROW_CSS", $row_css);
            $tpl->parseCurrentBlock();
        }
        
        include_once("./Services/PersonalDesktop/classes/class.ilPDContentBlockGUI.php");
        $content_block = new ilPDContentBlockGUI();
        $content_block->setContent($tpl->get());
        if ($this->getProperty("title") != "") {
            $content_block->setTitle($this->getProperty("title"));
        } else {
            $content_block->setTitle($lng->txt("news_internal_news"));
        }
        $this->addCloseCommand($content_block);

        // previous
        if ($previous != "") {
            if ($previous["ref_id"] > 0) {
                $ilCtrl->setParameter($this, "news_context", $previous["ref_id"]);
            }
            $ilCtrl->setParameter($this, "news_id", $previous["id"]);
            $content_block->addFooterLink(
                $lng->txt("previous"),
                $ilCtrl->getLinkTarget($this, "showNews"),
                "",
                "",
                true
            );
            $ilCtrl->setParameter($this, "news_context", "");
        }
        
        // next
        if ($c = next($this->data)) {
            if ($c["ref_id"] > 0) {
                $ilCtrl->setParameter($this, "news_context", $c["ref_id"]);
            }
            $ilCtrl->setParameter($this, "news_id", $c["id"]);
            $content_block->addFooterLink(
                $lng->txt("next"),
                $ilCtrl->getLinkTarget($this, "showNews"),
                "",
                "",
                true
            );
        }
        $ilCtrl->setParameter($this, "news_context", "");
        $ilCtrl->setParameter($this, "news_id", "");
        $content_block->setCurrentItemNumber($curr_cnt);
        $content_block->setEnableNumInfo(true);
        $content_block->setData($this->getData());

        return $content_block->getHTML();
    }

    protected function getMediaPath(int $mob_id)
    {
        $media_path = "";
        if ($mob_id > 0) {
            $mob = new ilObjMediaObject($mob_id);
            $med = $mob->getMediaItem("Standard");
            if (strcasecmp("Reference", $med->getLocationType()) == 0) {
                $media_path = $med->getLocation();
            } else {
                $media_path = ilObjMediaObject::_getURL($mob->getId()) . "/" . $med->getLocation();
            }
        }
        return $media_path;
    }

    public function makeClickable($a_str)
    {
        // this fixes bug 8744. We assume that strings that contain < and >
        // already contain html, we do not handle these
        if (is_int(strpos($a_str, ">")) && is_int(strpos($a_str, "<"))) {
            return $a_str;
        }
        
        return ilUtil::makeClickable($a_str);
    }
    
    
    public function unsubscribeNews()
    {
        $ilUser = $this->user;
        $ilCtrl = $this->ctrl;
        
        include_once("./Services/News/classes/class.ilNewsSubscription.php");
        ilNewsSubscription::_unsubscribe($_GET["ref_id"], $ilUser->getId());
        $ilCtrl->returnToParent($this);
    }

    public function subscribeNews()
    {
        $ilUser = $this->user;
        $ilCtrl = $this->ctrl;

        include_once("./Services/News/classes/class.ilNewsSubscription.php");
        ilNewsSubscription::_subscribe($_GET["ref_id"], $ilUser->getId());
        $ilCtrl->returnToParent($this);
    }
    
    public function fillFooter()
    {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        $ilUser = $this->user;

        parent::fillFooter();
        
        if ($this->show_view_selection) {
            $this->showViewFooter();
        }
    }

    public function showViewFooter()
    {
        $ilUser = $this->user;
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
        
        return;         // notifications always shown
        
        $this->clearFooterLinks();
        $this->addFooterLink("[" . $lng->txt("news_first_letter_of_word_notification") . "] " .
            $lng->txt("news_notifications") . ": ", "", "", "", false, true);
        if ($this->view == "hide_notifications") {
            $this->addFooterLink(
                $lng->txt("show"),
                $ilCtrl->getLinkTarget(
                    $this,
                    "showNotifications"
                ),
                $ilCtrl->getLinkTarget(
                    $this,
                    "showNotifications",
                    "",
                    true
                ),
                "block_" . $this->getBlockType() . "_" . $this->block_id
            );
            $this->addFooterLink($lng->txt("hide"));
        } else {
            $this->addFooterLink($lng->txt("show"));
            $this->addFooterLink(
                $lng->txt("hide"),
                $ilCtrl->getLinkTarget(
                    $this,
                    "hideNotifications"
                ),
                $ilCtrl->getLinkTarget(
                    $this,
                    "hideNotifications",
                    "",
                    true
                ),
                "block_" . $this->getBlockType() . "_" . $this->block_id
            );
        }

        $this->fillFooterLinks();
    }
    
    public function showNotifications()
    {
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;
        
        include_once("Services/Block/classes/class.ilBlockSetting.php");
        $view = ilBlockSetting::_write(
            $this->getBlockType(),
            "view",
            "",
            $ilUser->getId(),
            $this->block_id
        );

        // reload data
        $data = $this->getNewsData();
        $this->setData($data);
        $this->handleView();

        if ($ilCtrl->isAsynch()) {
            echo $this->getHTML();
            exit;
        } else {
            $ilCtrl->returnToParent($this);
        }
    }
    
    public function hideNotifications()
    {
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;

        include_once("Services/Block/classes/class.ilBlockSetting.php");
        $view = ilBlockSetting::_write(
            $this->getBlockType(),
            "view",
            "hide_notifications",
            $ilUser->getId(),
            $this->block_id
        );

        // reload data
        $data = $this->getNewsData();
        $this->setData($data);
        $this->handleView();

        if ($ilCtrl->isAsynch()) {
            echo $this->getHTML();
            exit;
        } else {
            $ilCtrl->returnToParent($this);
        }
    }
    
    public function editSettings()
    {
        $this->initSettingsForm();
        return $this->settings_form->getHTML();
    }
    
    public function initSettingsForm()
    {
        $ilUser = $this->user;
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
        $ilSetting = $this->settings;
        $ilTabs = $this->tabs;

        $ilTabs->clearTargets();

        $news_set = new ilSetting("news");
        $enable_internal_rss = $news_set->get("enable_rss_for_internal");

        $public = ilBlockSetting::_lookup(
            $this->getBlockType(),
            "public_notifications",
            0,
            $this->block_id
        );
        $public_feed = ilBlockSetting::_lookup(
            $this->getBlockType(),
            "public_feed",
            0,
            $this->block_id
        );
        $hide_block = ilBlockSetting::_lookup(
            $this->getBlockType(),
            "hide_news_block",
            0,
            $this->block_id
        );
        $hide_news_per_date = ilBlockSetting::_lookup(
            $this->getBlockType(),
            "hide_news_per_date",
            0,
            $this->block_id
        );
        $hide_news_date = ilBlockSetting::_lookup(
            $this->getBlockType(),
            "hide_news_date",
            0,
            $this->block_id
        );

        if ($hide_news_date != "") {
            $hide_news_date = explode(" ", $hide_news_date);
        }

        include_once("./Services/Form/classes/class.ilPropertyFormGUI.php");
        $this->settings_form = new ilPropertyFormGUI();
        $this->settings_form->setTitle($lng->txt("news_settings"));
        
        // hide news block for learners
        if ($this->getProperty("hide_news_block_option")) {
            $ch = new ilCheckboxInputGUI(
                $lng->txt("news_hide_news_block"),
                "hide_news_block"
            );
            $ch->setInfo($lng->txt("news_hide_news_block_info"));
            $ch->setChecked($hide_block);
            $this->settings_form->addItem($ch);
            
            $hnpd = new ilCheckboxInputGUI(
                $lng->txt("news_hide_news_per_date"),
                "hide_news_per_date"
            );
            $hnpd->setInfo($lng->txt("news_hide_news_per_date_info"));
            $hnpd->setChecked($hide_news_per_date);
            
            $dt_prop = new ilDateTimeInputGUI(
                $lng->txt("news_hide_news_date"),
                "hide_news_date"
            );
            $dt_prop->setRequired(true);
            if ($hide_news_date != "") {
                $dt_prop->setDate(new ilDateTime($hide_news_date[0] . ' ' . $hide_news_date[1], IL_CAL_DATETIME));
            }
            #$dt_prop->setDate($hide_news_date[0]);
            #$dt_prop->setTime($hide_news_date[1]);
            $dt_prop->setShowTime(true);
            //$dt_prop->setInfo($lng->txt("news_hide_news_date_info"));
            $hnpd->addSubItem($dt_prop);
                
            $this->settings_form->addItem($hnpd);
        }

        // default visibility
        if ($this->getProperty("default_visibility_option") &&
            $enable_internal_rss) {
            $default_visibility = ilBlockSetting::_lookup(
                $this->getBlockType(),
                "default_visibility",
                0,
                $this->block_id
            );
            if ($default_visibility == "") {
                $default_visibility =
                    ilNewsItem::_getDefaultVisibilityForRefId($_GET["ref_id"]);
            }

            // Default Visibility
            $radio_group = new ilRadioGroupInputGUI($lng->txt("news_default_visibility"), "default_visibility");
            $radio_option = new ilRadioOption($lng->txt("news_visibility_users"), "users");
            $radio_group->addOption($radio_option);
            $radio_option = new ilRadioOption($lng->txt("news_visibility_public"), "public");
            $radio_group->addOption($radio_option);
            $radio_group->setInfo($lng->txt("news_news_item_visibility_info"));
            $radio_group->setRequired(false);
            $radio_group->setValue($default_visibility);
            $this->settings_form->addItem($radio_group);
        }

        // public notifications
        if ($this->getProperty("public_notifications_option") &&
            $enable_internal_rss) {
            $ch = new ilCheckboxInputGUI(
                $lng->txt("news_notifications_public"),
                "notifications_public"
            );
            $ch->setInfo($lng->txt("news_notifications_public_info"));
            $ch->setChecked($public);
            $this->settings_form->addItem($ch);
        }

        // extra rss feed
        if ($enable_internal_rss) {
            $ch = new ilCheckboxInputGUI(
                $lng->txt("news_public_feed"),
                "notifications_public_feed"
            );
            $ch->setInfo($lng->txt("news_public_feed_info"));
            $ch->setChecked($public_feed);
            $this->settings_form->addItem($ch);
        }

        
        //$this->settings_form->addCheckboxProperty($lng->txt("news_public_feed"), "notifications_public_feed",
        //      "1", $public_feed, $lng->txt("news_public_feed_info"));
        //if ($this->getProperty("public_notifications_option"))
        //{
        //      $this->settings_form->addCheckboxProperty($lng->txt("news_notifications_public"), "notifications_public",
        //              "1", $public, $lng->txt("news_notifications_public_info"));
        //}
        $this->settings_form->addCommandButton("saveSettings", $lng->txt("save"));
        $this->settings_form->addCommandButton("cancelSettings", $lng->txt("cancel"));
        $this->settings_form->setFormAction($ilCtrl->getFormaction($this));
    }

    public static function addToSettingsForm(ilFormPropertyGUI $a_input)
    {
        global $DIC;

        $lng = $DIC->language();
        $block_id = $DIC->ctrl()->getContextObjId();

        $news_set = new ilSetting("news");
        $enable_internal_rss = $news_set->get("enable_rss_for_internal");

        //$public_notification = ilBlockSetting::_lookup(self::$block_type, "public_notifications",0, $block_id);
        $public_feed = ilBlockSetting::_lookup(
            self::$block_type,
            "public_feed",
            0,
            $block_id
        );

        $default_visibility = ilBlockSetting::_lookup(self::$block_type, "default_visibility", 0, $block_id);
        if ($default_visibility == "") {
            $default_visibility =
                ilNewsItem::_getDefaultVisibilityForRefId($_GET["ref_id"]);
        }
        $radio_group = new ilRadioGroupInputGUI($lng->txt("news_default_visibility"), "default_visibility");
        $radio_option = new ilRadioOption($lng->txt("news_visibility_users"), "users");
        $radio_group->addOption($radio_option);
        $radio_option = new ilRadioOption($lng->txt("news_visibility_public"), "public");
        $radio_group->addOption($radio_option);
        $radio_group->setInfo($lng->txt("news_news_item_visibility_info"));
        $radio_group->setRequired(false);
        $radio_group->setValue($default_visibility);
        $a_input->addSubItem($radio_group);

        // extra rss feed
        if ($enable_internal_rss) {
            $radio_rss = new ilCheckboxInputGUI(
                $lng->txt("news_public_feed"),
                "notifications_public_feed"
            );
            $radio_rss->setInfo($lng->txt("news_public_feed_info"));
            $radio_rss->setChecked($public_feed);
            $a_input->addSubItem($radio_rss);
        }
    }

    public static function writeSettings($a_values)
    {
        global $DIC;

        $block_id = $DIC->ctrl()->getContextObjId();
        foreach ($a_values as $key => $value) {
            ilBlockSetting::_write(self::$block_type, $key, $value, 0, $block_id);
        }
    }

    public function cancelSettings()
    {
        $ilCtrl = $this->ctrl;
        
        $ilCtrl->returnToParent($this);
    }
    
    public function saveSettings()
    {
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;
        
        $this->initSettingsForm();
        if ($this->settings_form->checkInput()) {
            $news_set = new ilSetting("news");
            $enable_internal_rss = $news_set->get("enable_rss_for_internal");
            
            if ($enable_internal_rss) {
                ilBlockSetting::_write(
                    $this->getBlockType(),
                    "public_notifications",
                    $_POST["notifications_public"],
                    0,
                    $this->block_id
                );
                ilBlockSetting::_write(
                    $this->getBlockType(),
                    "public_feed",
                    $_POST["notifications_public_feed"],
                    0,
                    $this->block_id
                );
                ilBlockSetting::_write(
                    $this->getBlockType(),
                    "default_visibility",
                    $_POST["default_visibility"],
                    0,
                    $this->block_id
                );
            }
            
            if ($this->getProperty("hide_news_block_option")) {
                ilBlockSetting::_write(
                    $this->getBlockType(),
                    "hide_news_block",
                    $_POST["hide_news_block"],
                    0,
                    $this->block_id
                );
                ilBlockSetting::_write(
                    $this->getBlockType(),
                    "hide_news_per_date",
                    $_POST["hide_news_per_date"],
                    0,
                    $this->block_id
                );

                // hide date
                $hd = $this->settings_form->getItemByPostVar("hide_news_date");
                $hide_date = $hd->getDate();
                if ($_POST["hide_news_per_date"] && $hide_date != null) {
                    ilBlockSetting::_write(
                        $this->getBlockType(),
                        "hide_news_date",
                        $hide_date->get(IL_CAL_DATETIME),
                        0,
                        $this->block_id
                    );
                } else {
                    ilBlockSetting::_write(
                        $this->getBlockType(),
                        "hide_news_date",
                        "",
                        0,
                        $this->block_id
                    );
                }
            }
            
            include_once("./Services/News/classes/class.ilNewsCache.php");
            $cache = new ilNewsCache();
            $cache->deleteEntry($ilUser->getId() . ":" . $_GET["ref_id"]);

            $ilCtrl->returnToParent($this);
        } else {
            $this->settings_form->setValuesByPost();
            return $this->settings_form->getHtml();
        }
    }

    public function showFeedUrl()
    {
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;
        
        include_once("./Services/News/classes/class.ilNewsItem.php");
        
        $title = ilObject::_lookupTitle($this->block_id);
        
        $tpl = new ilTemplate("tpl.show_feed_url.html", true, true, "Services/News");
        $tpl->setVariable(
            "TXT_TITLE",
            sprintf($lng->txt("news_feed_url_for"), $title)
        );
        $tpl->setVariable("TXT_INFO", $lng->txt("news_get_feed_info"));
        $tpl->setVariable("TXT_FEED_URL", $lng->txt("news_feed_url"));
        $tpl->setVariable(
            "VAL_FEED_URL",
            ILIAS_HTTP_PATH . "/feed.php?client_id=" . rawurlencode(CLIENT_ID) . "&user_id=" . $ilUser->getId() .
                "&obj_id=" . $this->block_id .
                "&hash=" . ilObjUser::_lookupFeedHash($ilUser->getId(), true)
        );
        $tpl->setVariable(
            "VAL_FEED_URL_TXT",
            ILIAS_HTTP_PATH . "/feed.php?client_id=" . rawurlencode(CLIENT_ID) . "&<br />user_id=" . $ilUser->getId() .
                "&obj_id=" . $this->block_id .
                "&hash=" . ilObjUser::_lookupFeedHash($ilUser->getId(), true)
        );
        
        include_once("./Services/PersonalDesktop/classes/class.ilPDContentBlockGUI.php");
        $content_block = new ilPDContentBlockGUI();
        $content_block->setContent($tpl->get());
        $content_block->setTitle($lng->txt("news_internal_news"));
        $content_block->addHeaderCommand(
            $ilCtrl->getParentReturn($this),
            $lng->txt("close"),
            true
        );

        return $content_block->getHTML();
    }

    public function addCloseCommand($a_content_block)
    {
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
        
        $a_content_block->addHeaderCommand(
            $ilCtrl->getParentReturn($this),
            $lng->txt("close"),
            true
        );
    }
    
    public function getDynamic()
    {
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;
        
        if ($ilCtrl->getCmd() == "hideNotifications" ||
            $ilCtrl->getCmd() == "showNotifications") {
            return false;
        }
        
        if ($ilCtrl->getCmdClass() != "ilcolumngui" && $ilCtrl->getCmd() != "enableJS") {
            $sess_feed_js = "";
            if (isset($_SESSION["il_feed_js"])) {
                $sess_feed_js = $_SESSION["il_feed_js"];
            }
            
            if ($sess_feed_js != "n" &&
                ($ilUser->getPref("il_feed_js") != "n" || $sess_feed_js == "y")) {
                // do not get feed dynamically, if cache hit is given.
                //                              if (!$this->feed->checkCacheHit())
                //                              {
                return true;
                //                              }
            }
        }
        
        return false;
    }

    public function getDynamicReload()
    {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        
        $ilCtrl->setParameterByClass(
            "ilcolumngui",
            "block_id",
            "block_" . $this->getBlockType() . "_" . $this->getBlockId()
        );

        $rel_tpl = new ilTemplate("tpl.dynamic_reload.html", true, true, "Services/News");
        $rel_tpl->setVariable("TXT_LOADING", $lng->txt("news_loading_news"));
        $rel_tpl->setVariable("BLOCK_ID", "block_" . $this->getBlockType() . "_" . $this->getBlockId());
        $rel_tpl->setVariable(
            "TARGET",
            $ilCtrl->getLinkTargetByClass("ilcolumngui", "updateBlock", "", true)
        );
            
        // no JS
        $rel_tpl->setVariable("TXT_NEWS_CLICK_HERE", $lng->txt("news_no_js_click_here"));
        $rel_tpl->setVariable(
            "TARGET_NO_JS",
            $ilCtrl->getLinkTargetByClass(strtolower(get_class($this)), "disableJS")
        );

        return $rel_tpl->get();
    }
    
    public function getJSEnabler()
    {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        
        $ilCtrl->setParameterByClass(
            "ilcolumngui",
            "block_id",
            "block_" . $this->getBlockType() . "_" . $this->getBlockId()
        );
        //echo "hh";
        $rel_tpl = new ilTemplate("tpl.js_enabler.html", true, true, "Services/News");
        $rel_tpl->setVariable("BLOCK_ID", "block_" . $this->getBlockType() . "_" . $this->getBlockId());
        $rel_tpl->setVariable(
            "TARGET",
            $ilCtrl->getLinkTargetByClass(strtolower(get_class($this)), "enableJS", true, "", false)
        );
            
        return $rel_tpl->get();
    }
    
    
    public function disableJS()
    {
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;

        $_SESSION["il_feed_js"] = "n";
        $ilUser->writePref("il_feed_js", "n");
        $ilCtrl->returnToParent($this);
        //$ilCtrl->redirectByClass("ilpersonaldesktopgui", "show");
    }
    
    public function enableJS()
    {
        $ilUser = $this->user;
        //echo "enableJS";
        $_SESSION["il_feed_js"] = "y";
        $ilUser->writePref("il_feed_js", "y");
        echo $this->getHTML();
        exit;
    }
}