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
{
        static $block_type = "news";
        static $st_data;
        
        function ilNewsForContextBlockGUI()
        {
                global $ilCtrl, $lng, $ilUser, $ilHelp;

                parent::ilBlockGUI();
                
                $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 = $this->acache->getEntry($ilUser->getId().":".$_GET["ref_id"]);
                $this->cache_hit = false;

                if ($this->acache->getLastAccessStatus() == "hit")
                {
                        self::$st_data = unserialize($cres);
                        $this->cache_hit = true;
                }
                if ($this->getDynamic() && !$this->cache_hit)
                {
                        $this->dynamic = true;
                        $data = array();
                }
                else if ($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();
        }
        
        function getNewsData()
        {
                global $ilCtrl, $ilUser;

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

        static function isRepositoryObject()
        {
                return false;
        }
        
        static function getScreenMode()
        {
                global $ilCtrl;
                
                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;
                }
        }

        function &executeCommand()
        {
                global $ilCtrl;

                $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;
        }

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

        function getHTML()
        {
                global $ilCtrl, $lng, $ilUser;
                
                $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)
                {
                        $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;
        }

        function handleView()
        {
                global $ilUser;
                
                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)
                {
                        $this->show_view_selection = true;
                }
                else if ($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;
                }
*/
        }
        
        function fillRow($news)
        {
                global $ilUser, $ilCtrl, $lng;

                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();
                }
                
                // notification
                if ($news["priority"] == 0)
                {
/*
                        $this->tpl->setCurrentBlock("notification");
                        $this->tpl->setVariable("CHAR_NOT", $lng->txt("news_first_letter_of_word_notification"));
                        $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", "dbk", "htlm"))
                                ? "lres"
                                : "obj_".$type;

                        $this->tpl->setCurrentBlock("news_context");
                        $this->tpl->setVariable("TYPE", $lng->txt($lang_type));
                        $this->tpl->setVariable("IMG_TYPE",
                                ilObject::_getIcon($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);
        }

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

        function showNews()
        {
                global $lng, $ilCtrl, $ilUser;
                
                // 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");
                $news = new ilNewsItem($_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++;
                }
                
                // 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("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"]);
                }
                        
                foreach ($news_list as $item)
                {
                        // user
                        if ($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
                        if ($item["content_type"] == NEWS_AUDIO &&
                                $item["mob_id"] > 0 && ilObject::_exists($item["mob_id"]))
                        {
                                include_once("./Services/MediaObjects/classes/class.ilObjMediaObject.php");
                                include_once("./Services/MediaObjects/classes/class.ilMediaPlayerGUI.php");
                                $mob = new ilObjMediaObject($item["mob_id"]);
                                $med = $mob->getMediaItem("Standard");
                                $mpl = new ilMediaPlayerGUI("news_pl_".$item["mob_id"]);
                                if (strcasecmp("Reference", $med->getLocationType()) == 0)
                                        $mpl->setFile($med->getLocation());
                                else
                                        $mpl->setFile(ilObjMediaObject::_getURL($mob->getId())."/".$med->getLocation());
                                $mpl->setDisplayHeight($med->getHeight());
                                $tpl->setCurrentBlock("player");
                                $tpl->setVariable("PLAYER",
                                        $mpl->getMp3PlayerHtml());
                                $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
                        if (trim($item["content"]) != "")               // content
                        {
                                $tpl->setCurrentBlock("content");
                                $tpl->setVariable("VAL_CONTENT",
                                        nl2br($this->makeClickable(
                                        ilNewsItem::determineNewsContent($item["context_obj_type"], $item["content"], $item["content_text_is_lang_var"])
                                        )));
//$tpl->setVariable("VAL_CONTENT", nl2br($item["content"]));
                                $tpl->parseCurrentBlock();
                        }
                        if (trim($item["content_long"]) != "")  // long content
                        {
                                $tpl->setCurrentBlock("long");
                                $tpl->setVariable("VAL_LONG_CONTENT", $this->makeClickable($item["content_long"]));
                                $tpl->parseCurrentBlock();
                        }
                        if ($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("dbk", "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"];
                                }

        
                                $context_opened = false;                                
                                if ($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"]));
                        
                        $row_css = ($row_css != "tblrow1")
                                ? "tblrow1"
                                : "tblrow2";
                        
                        $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();
        }

        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);
        }
        
        
        function unsubscribeNews()
        {
                global $ilUser, $ilCtrl;
                
                include_once("./Services/News/classes/class.ilNewsSubscription.php");
                ilNewsSubscription::_unsubscribe($_GET["ref_id"], $ilUser->getId());
                $ilCtrl->returnToParent($this);
        }

        function subscribeNews()
        {
                global $ilUser, $ilCtrl;

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

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

        function showViewFooter()
        {
                global $ilUser, $lng, $ilCtrl;
                
                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();
        }
        
        function showNotifications()
        {
                global $ilCtrl, $ilUser;
                
                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);
                }
        }
        
        function hideNotifications()
        {
                global $ilCtrl, $ilUser;

                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);
                }
        }
        
        function editSettings()
        {
                $this->initSettingsForm();
                return $this->settings_form->getHTML();
        }
        
        function initSettingsForm()
        {
                global $ilUser, $lng, $ilCtrl, $ilSetting, $ilTabs;

                $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");
                                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));
        }
        
        function cancelSettings()
        {
                global $ilCtrl;
                
                $ilCtrl->returnToParent($this);
        }
        
        function saveSettings()
        {
                global $ilCtrl, $ilUser;
                
                $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->getInput("hide_news_date");
                                $hide_date = new ilDateTime($hd["date"]." ".
                                        $hd["time"],IL_CAL_DATETIME,$ilUser->getTimeZone());
                                ilBlockSetting::_write($this->getBlockType(), "hide_news_date",
                                        $hide_date->get(IL_CAL_DATETIME),
                                        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();
                }
        }

        function showFeedUrl()
        {
                global $lng, $ilCtrl, $ilUser;
                
                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();
        }

        function addCloseCommand($a_content_block)
        {
                global $lng, $ilCtrl;
                
                $a_content_block->addHeaderCommand($ilCtrl->getParentReturn($this),
                        $lng->txt("close"), true);
        }
        
        function getDynamic()
        {
                global $ilCtrl, $ilUser;
                
                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;
        }

        function getDynamicReload()
        {
                global $ilCtrl, $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();
        }
        
        function getJSEnabler()
        {
                global $ilCtrl, $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();
        }
        
        
        function disableJS()
        {
                global $ilCtrl, $ilUser;

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

}

?>