class.ilBlogPostingGUI.php

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

include_once("./Services/COPage/classes/class.ilPageObjectGUI.php");
include_once("./Modules/Blog/classes/class.ilBlogPosting.php");

class ilBlogPostingGUI extends ilPageObjectGUI
{
        protected $node_id; // [int]
        protected $access_handler; // [object]
        protected $enable_public_notes; // [bool]
        protected $may_contribute; // [bool]

        function __construct($a_node_id, $a_access_handler = null, $a_id = 0, $a_old_nr = 0, $a_enable_public_notes = true, $a_may_contribute = true, $a_style_sheet_id = 0)
        {
                global $tpl, $lng;

                $lng->loadLanguageModule("blog");

                $this->node_id = $a_node_id;
                $this->access_handler = $a_access_handler;
                $this->enable_public_notes = (bool)$a_enable_public_notes;

                parent::__construct("blp", $a_id, $a_old_nr);

                // needed for notification
                $this->getBlogPosting()->setBlogNodeId($this->node_id, $this->isInWorkspace());
                
                // #11151
                $this->may_contribute = (bool)$a_may_contribute;
                $this->setEnableEditing($a_may_contribute);
                
                // content style
                include_once("./Services/Style/classes/class.ilObjStyleSheet.php");
                
                $tpl->setCurrentBlock("SyntaxStyle");
                $tpl->setVariable("LOCATION_SYNTAX_STYLESHEET",
                        ilObjStyleSheet::getSyntaxStylePath());
                $tpl->parseCurrentBlock();
                
                // #17814
                $tpl->setCurrentBlock("ContentStyle");
                $tpl->setVariable("LOCATION_CONTENT_STYLESHEET",
                        ilObjStyleSheet::getContentStylePath($a_style_sheet_id));
                $tpl->parseCurrentBlock();              
                                        
                // needed for editor                    
                $this->setStyleId($a_style_sheet_id);   
        }

        function executeCommand()
        {
                global $ilCtrl, $ilTabs, $ilLocator, $tpl;
                
                $next_class = $ilCtrl->getNextClass($this);
                $cmd = $ilCtrl->getCmd();

                $posting = $this->getBlogPosting();
                $ilCtrl->setParameter($this, "blpg", $posting->getId());
                
                switch($next_class)
                {
                        case "ilnotegui":                               
                                // $this->getTabs();
                                // $ilTabs->setTabActive("pg");
                                return $this->previewFullscreen();

                        /*
                        case "ilratinggui":
                                include_once("./Services/Rating/classes/class.ilRatingGUI.php");
                                $rating_gui = new ilRatingGUI();
                                $rating_gui->setObject($this->getBlogPosting()->getParentId(), "blog",
                                        $this->getBlogPosting()->getId(), "blp");
                                $this->ctrl->forwardCommand($rating_gui);
                                $ilCtrl->redirect($this, "preview");
                                break;
                        */
                                
                        case "ilpageobjectgui":
                die("Deprecated. Blog Posting gui forwarding to ilpageobject");
                                return;
                                
                        default:
                                if($posting)
                                {
                                        $this->setPresentationTitle($posting->getTitle());
                                        
                                        $tpl->setTitle(ilObject::_lookupTitle($this->getBlogPosting()->getBlogId()).": ". // #15017
                                                $posting->getTitle());
                                        $tpl->setTitleIcon(ilUtil::getImagePath("icon_blog.svg"),
                                                $this->lng->txt("obj_blog")); // #12879
                                        
                                        $ilLocator->addItem($posting->getTitle(),
                                                $ilCtrl->getLinkTarget($this, "preview"));                                                      
                                }
                                return parent::executeCommand();
                }
        }

        function setBlogPosting(ilBlogPosting $a_posting)
        {
                $this->setPageObject($a_posting);
        }

        function getBlogPosting()
        {
                return $this->getPageObject();
        }

        protected function checkAccess($a_cmd)
        {
                if($a_cmd == "contribute")
                {
                        return $this->may_contribute;
                }
                return $this->access_handler->checkAccess($a_cmd, "", $this->node_id);
        }

        function preview($a_mode = null)
        {
                global $ilCtrl, $tpl, $ilSetting;
                
                $this->getBlogPosting()->increaseViewCnt();
                
                $wtpl = new ilTemplate("tpl.blog_page_view_main_column.html",
                        true, true, "Modules/Blog");
                
                // page commands                 
                if(!$a_mode)
                {               
                        /*
                        // delete
                        $page_commands = false;
                        if ($this->checkAccess("write"))
                        {
                                $wtpl->setCurrentBlock("page_command");
                                $wtpl->setVariable("HREF_PAGE_CMD",
                                        $ilCtrl->getLinkTarget($this, "deleteBlogPostingConfirmationScreen"));
                                $wtpl->setVariable("TXT_PAGE_CMD", $lng->txt("delete"));
                                $wtpl->parseCurrentBlock();
                        }               
                        if ($page_commands)
                        {
                                $wtpl->setCurrentBlock("page_commands");
                                $wtpl->parseCurrentBlock();
                        }                         
                        */
                }
                else
                {
                        $callback = array($this, "observeNoteAction");
                                                                        
                        // notes
                        
                        $may_delete_comments = ($this->checkAccess("contribute") &&
                                $ilSetting->get("comments_del_tutor", 1));
                        
                        $wtpl->setVariable("NOTES", $this->getNotesHTML($this->getBlogPosting(),
                                false, $this->enable_public_notes, $may_delete_comments, $callback));
                }

                // permanent link
                if($a_mode != "embedded")
                {
                        $append = ($_GET["blpg"] != "")
                                ? "_".$_GET["blpg"]
                                : "";
                        if($this->isInWorkspace())
                        {
                                $append .= "_wsp";
                        }
                        $tpl->setPermanentLink("blog", $this->node_id, $append);
                }
                
                $wtpl->setVariable("PAGE", parent::preview());

                $tpl->setLoginTargetPar("blog_".$this->node_id.$append);

                $ilCtrl->setParameter($this, "blpg", $this->getBlogPosting()->getId());

                return $wtpl->get();
        }
        
        function previewEmbedded()
        {               
                return $this->preview("embedded");
        }
        
        function previewFullscreen()
        {               
                $this->add_date = true;
                return $this->preview("fullscreen");
        }

        function showPage()
        {
                $this->setTemplateOutput(false);

                if (!$this->getAbstractOnly())
                {
                        $this->setPresentationTitle($this->getBlogPosting()->getTitle());
                }
                $this->getBlogPosting()->increaseViewCnt();
                
                return parent::showPage();
        }
        
        protected function isInWorkspace()
        {
                return stristr(get_class($this->access_handler), "workspace");
        }

        function postOutputProcessing($a_output)
        {
                // #8626/#9370
                if(($this->getOutputMode() == "preview" || $this->getOutputMode() == "offline") 
                        && !$this->getAbstractOnly() && $this->add_date)
                {                       
                        $author = "";
                        if(!$this->isInWorkspace())             
                        {
                                $authors = array();
                                $author_id = $this->getBlogPosting()->getAuthor();
                                if($author_id)
                                {
                                        include_once "Services/User/classes/class.ilUserUtil.php";
                                        $authors[] = ilUserUtil::getNamePresentation($author_id);
                                }               
                                                                
                                foreach(ilBlogPosting::getPageContributors("blp", $this->getBlogPosting()->getId()) as $editor)
                                {
                                        if($editor["user_id"] != $author_id)
                                        {
                                                $authors[] = ilUserUtil::getNamePresentation($editor["user_id"]);
                                        }
                                }
                                
                                if($authors)
                                {
                                        $author = implode(", ", $authors)." - ";
                                }
                        }
                        
                        // prepend creation date
                        $rel = ilDatePresentation::useRelativeDates();
                        ilDatePresentation::setUseRelativeDates(false);
                        $prefix = "<div class=\"il_BlockInfo\" style=\"text-align:right\">".
                                $author.ilDatePresentation::formatDate($this->getBlogPosting()->getCreated()).
                                "</div>";                       
                        ilDatePresentation::setUseRelativeDates($rel);
                        
                        $a_output = $prefix.$a_output;
                }
                
                return $a_output;
        }

        function getTabs($a_activate = "")
        {
                global $ilCtrl;

                $ilCtrl->setParameterByClass("ilobjbloggui", "blpg", $this->getBlogPosting()->getId());

                parent::getTabs($a_activate);
        }

        function deleteBlogPostingConfirmationScreen()
        {
                global $tpl, $ilCtrl, $lng;

                if ($this->checkAccess("write") || $this->checkAccess("contribute"))
                {
                        include_once("./Services/Utilities/classes/class.ilConfirmationGUI.php");
                        $confirmation_gui = new ilConfirmationGUI();
                        $confirmation_gui->setFormAction($ilCtrl->getFormAction($this));
                        $confirmation_gui->setHeaderText($lng->txt("blog_posting_deletion_confirmation"));
                        $confirmation_gui->setCancel($lng->txt("cancel"), "cancelBlogPostingDeletion");
                        $confirmation_gui->setConfirm($lng->txt("delete"), "confirmBlogPostingDeletion");
                        
                        $dtpl = new ilTemplate("tpl.blog_posting_deletion_confirmation.html", true,
                                true, "Modules/Blog");
                                
                        $dtpl->setVariable("PAGE_TITLE", $this->getBlogPosting()->getTitle());
                        
                        // notes/comments
                        include_once("./Services/Notes/classes/class.ilNote.php");
                        $cnt_note_users = ilNote::getUserCount($this->getBlogPosting()->getParentId(),
                                $this->getBlogPosting()->getId(), "wpg");
                        $dtpl->setVariable("TXT_NUMBER_USERS_NOTES_OR_COMMENTS",
                                $lng->txt("blog_number_users_notes_or_comments"));
                        $dtpl->setVariable("TXT_NR_NOTES_COMMENTS", $cnt_note_users);
                        
                        $confirmation_gui->addItem("", "", $dtpl->get());
                        
                        $tpl->setContent($confirmation_gui->getHTML());
                }
        }

        function cancelBlogPostingDeletion()
        {
                global $ilCtrl;
                
                $ilCtrl->redirect($this, "preview");
        }
        
        function confirmBlogPostingDeletion()
        {
                global $ilCtrl, $lng;

                if ($this->checkAccess("write") || $this->checkAccess("contribute"))
                {                       
                        // delete all md keywords
                        $md_section = $this->getBlogPosting()->getMDSection();
                        foreach($md_section->getKeywordIds() as $id)
                        {
                                $md_key = $md_section->getKeyword($id);                         
                                $md_key->delete();                              
                        }
                        
                        $this->getBlogPosting()->delete();
                        ilUtil::sendSuccess($lng->txt("blog_posting_deleted"), true);
                }
                
                $ilCtrl->setParameterByClass("ilobjbloggui", "blpg", ""); // #14363
                $ilCtrl->redirectByClass("ilobjbloggui", "render");
        }
        
        function editTitle($a_form = null)
        {
                global $tpl, $ilTabs;
                
                $ilTabs->activateTab("edit");
                
                if(!$a_form)
                {
                        $a_form = $this->initTitleForm();
                }
                
                $tpl->setContent($a_form->getHTML());
        }
        
        function updateTitle()
        {
                global $ilCtrl, $lng;
                
                $form = $this->initTitleForm();
                if($form->checkInput())
                {
                        $page = $this->getPageObject();
                        $page->setTitle($form->getInput("title"));
                        $page->update();                        
                        
                        ilUtil::sendSuccess($lng->txt("settings_saved"), true);
                        $ilCtrl->redirect($this, "preview");
                }
                
                $form->setValuesByPost();
                $this->editTitle($form);                
        }
        
        function initTitleForm()
        {
                global $lng, $ilCtrl;
                
                include_once('Services/Form/classes/class.ilPropertyFormGUI.php');
                $form = new ilPropertyFormGUI();
                $form->setFormAction($ilCtrl->getFormAction($this));
                $form->setTitle($lng->txt('blog_rename_posting'));
                
                $title = new ilTextInputGUI($lng->txt("title"), "title");
                $title->setRequired(true);
                $form->addItem($title);
                
                $title->setValue($this->getPageObject()->getTitle());
        
                $form->addCommandButton('updateTitle', $lng->txt('save'));
                $form->addCommandButton('preview', $lng->txt('cancel'));

                return $form;           
        }
        
        function editDate($a_form = null)
        {
                global $tpl, $ilTabs;
                
                $ilTabs->activateTab("edit");
                
                if(!$a_form)
                {
                        $a_form = $this->initDateForm();
                }
                
                $tpl->setContent($a_form->getHTML());
        }
        
        function updateDate()
        {
                global $ilCtrl, $lng;
                
                $form = $this->initDateForm();
                if($form->checkInput())
                {
                        $dt = $form->getInput("date");
                        $dt = new ilDateTime($dt["date"]." ".$dt["time"], IL_CAL_DATETIME);
                        
                        $page = $this->getPageObject();
                        $page->setCreated($dt);
                        $page->update();                        
                        
                        ilUtil::sendSuccess($lng->txt("settings_saved"), true);
                        $ilCtrl->redirect($this, "preview");
                }
                
                $form->setValuesByPost();
                $this->editTitle($form);                
        }
        
        function initDateForm()
        {
                global $lng, $ilCtrl;
                
                include_once('Services/Form/classes/class.ilPropertyFormGUI.php');
                $form = new ilPropertyFormGUI();
                $form->setFormAction($ilCtrl->getFormAction($this));
                $form->setTitle($lng->txt('blog_edit_date'));
                
                $date = new ilDateTimeInputGUI($lng->txt("date"), "date");
                $date->setRequired(true);
                $date->setShowTime(true);
                $date->setInfo($lng->txt('blog_edit_date_info'));
                $form->addItem($date);
                
                $date->setDate($this->getPageObject()->getCreated());
        
                $form->addCommandButton('updateDate', $lng->txt('save'));
                $form->addCommandButton('preview', $lng->txt('cancel'));

                return $form;           
        }
        
        function observeNoteAction($a_blog_id, $a_posting_id, $a_type, $a_action, $a_note_id)
        {
                // #10040 - get note text
                include_once "Services/Notes/classes/class.ilNote.php";
                $note = new ilNote($a_note_id);
                $note = $note->getText();
                
                include_once "Modules/Blog/classes/class.ilObjBlog.php";
                ilObjBlog::sendNotification("comment", $this->isInWorkspace(), $this->node_id, $a_posting_id, $note);           
        }
        
        protected function getActivationCaptions()
        {
                global $lng;
                
                return array("deactivatePage" => $lng->txt("blog_toggle_draft"),
                                "activatePage" => $lng->txt("blog_toggle_final"));
        }       
        
        function deactivatePageToList()
        {
                $this->deactivatePage(true);
        }
        
        function deactivatePage($a_to_list = false)
        {
                $this->getBlogPosting()->setApproved(false);
                $this->getBlogPosting()->setActive(false);
                $this->getBlogPosting()->update(true, false, false);
                if(!$a_to_list)
                {
                        $this->ctrl->redirect($this, "edit");
                }
                else
                {
                        $this->ctrl->setParameterByClass("ilobjbloggui", "blpg", ""); 
                        $this->ctrl->redirectByClass("ilobjbloggui", "");
                }
        }
        
        function activatePageToList()
        {
                $this->activatePage(true);      
        }
        
        function activatePage($a_to_list = false)
        {
                // send notifications
                include_once "Modules/Blog/classes/class.ilObjBlog.php";
                ilObjBlog::sendNotification("new", $this->isInWorkspace(), $this->node_id, $this->getBlogPosting()->getId());            
                
                $this->getBlogPosting()->setActive(true);
                $this->getBlogPosting()->update(true, false, false);
                if(!$a_to_list)
                {
                        $this->ctrl->redirect($this, "edit");
                }
                else
                {
                        $this->ctrl->setParameterByClass("ilobjbloggui", "blpg", ""); 
                        $this->ctrl->redirectByClass("ilobjbloggui", "");
                }
        }
        
        function editKeywords(ilPropertyFormGUI $a_form = null)
        {
                global $ilTabs, $tpl;
                
                if (!$this->checkAccess("contribute"))
                {
                        return;
                }
                
                $ilTabs->activateTab("pg");
                
                if(!$a_form)
                {
                        $a_form = $this->initKeywordsForm();
                }
                
                $tpl->setContent($a_form->getHTML());
        }
        
        protected function initKeywordsForm()
        {
                global $ilUser;
                
                include_once("Services/Form/classes/class.ilPropertyFormGUI.php");
                $form = new ilPropertyFormGUI();                
                $form->setFormAction($this->ctrl->getFormAction($this, "saveKeywordsForm"));
                $form->setTitle($this->lng->txt("blog_edit_keywords"));
                
                $txt = new ilTextInputGUI($this->lng->txt("blog_keywords"), "keywords");
                // $txt->setRequired(true); #10504
                $txt->setMulti(true);
                $txt->setDataSource($this->ctrl->getLinkTarget($this, "keywordAutocomplete", "", true));
                $txt->setMaxLength(200);
                $txt->setSize(50);
                $txt->setInfo($this->lng->txt("blog_keywords_info"));
                $form->addItem($txt);
                                
                $md_section = $this->getBlogPosting()->getMDSection();
                
                $keywords = array();
                foreach($ids = $md_section->getKeywordIds() as $id)
                {
                        $md_key = $md_section->getKeyword($id);
                        if (trim($md_key->getKeyword()) != "")
                        {
                                $keywords[$md_key->getKeywordLanguageCode()][]
                                        = $md_key->getKeyword();
                        }
                }
                                                                                
                // language is not "used" anywhere
                $ulang = $ilUser->getLanguage();
                if($keywords[$ulang])
                {
                        asort($keywords[$ulang]);
                        $txt->setValue($keywords[$ulang]);
                }
                
                // other keywords in blog
                $other = array();
                foreach(array_keys(ilBlogPosting::getAllPostings($this->getBlogPosting()->getBlogId())) as $posting_id)
                {
                        if($posting_id != $this->getBlogPosting()->getId())
                        {
                                $other = array_merge($other, ilBlogPosting::getKeywords($this->getBlogPosting()->getBlogId(), $posting_id));
                        }
                }
                // #17414
                $other = array_unique($other);
                sort($other, SORT_LOCALE_STRING);
                if(is_array($keywords[$ulang]))
                {                       
                        $other = array_diff($other, $keywords[$ulang]);
                }
                if(sizeof($other))
                {
                        $html = "";
                        foreach($other as $item)
                        {
                                $html .= '<span class="ilTag">'.$item.'</span>';
                        }
                        $info = new ilNonEditableValueGUI($this->lng->txt("blog_keywords_other"), "", true);
                        $info->setInfo($this->lng->txt("blog_keywords_other_info"));
                        $info->setValue($html);
                        $form->addItem($info);
                }
                
                $form->addCommandButton("saveKeywordsForm", $this->lng->txt("save"));
                $form->addCommandButton("preview", $this->lng->txt("cancel"));

                return $form;                           
        }
        
        protected function getParentObjId()
        {
                if($this->node_id)
                {
                        if($this->isInWorkspace())
                        {
                                return $this->access_handler->getTree()->lookupObjectId($this->node_id);
                        }
                        else
                        {
                                return ilObject::_lookupObjId($this->node_id);
                        }
                }
        }
        
        function saveKeywordsForm()
        {               
                $form = $this->initKeywordsForm();
                if($form->checkInput())
                {                       
                        $keywords = $form->getInput("keywords");
                        if(is_array($keywords))
                        {
                                $this->getBlogPosting()->updateKeywords($keywords);
                        }
                        
                        $this->ctrl->redirect($this, "preview");
                }
                
                $form->setValuesByPost();
                $this->editKeywords($form);
        }
        
        function keywordAutocomplete()
        {                               
                $force_all = (bool)$_GET["fetchall"];
                
                include_once("./Services/MetaData/classes/class.ilMDKeyword.php");
                $res = ilMDKeyword::_getMatchingKeywords(ilUtil::stripSlashes($_GET["term"]),
                        "blp", $this->getParentObjId());
                
                include_once("./Services/Search/classes/class.ilSearchSettings.php");
                $cut = (int)ilSearchSettings::getInstance()->getAutoCompleteLength();           
                
                $has_more = false;              
                $result = array();              
                foreach ($res as $r)
                {
                        if(!$force_all &&
                                sizeof($result["items"]) >= $cut)
                        {
                                $has_more = true;
                                break;
                        }                       
                        $entry = new stdClass();
                        $entry->value = $r;
                        $entry->label = $r;
                        $result["items"][] = $entry;
                }
                
                $result["hasMoreResults"] = $has_more;

                include_once './Services/JSON/classes/class.ilJsonUtil.php';
                echo ilJsonUtil::encode($result);
                exit;
        }
        
        static function getSnippet($a_id, $a_truncate = false, $a_truncate_length = 500, $a_truncate_sign = "...", $a_include_picture = false, $a_picture_width = 144, $a_picture_height = 144, $a_export_directory = null)
        {                                       
                $bpgui = new self(0, null, $a_id);
                
                // scan the full page for media objects
                if($a_include_picture)
                {
                        $img = $bpgui->getFirstMediaObjectAsTag($a_picture_width, $a_picture_height, $a_export_directory);
                }
                
                $bpgui->setRawPageContent(true);
                $bpgui->setAbstractOnly(true);          

                // #8627: export won't work - should we set offline mode?
                $bpgui->setFileDownloadLink(".");
                $bpgui->setFullscreenLink(".");
                $bpgui->setSourcecodeDownloadScript(".");                                               
                 
                // render without title
                $page = $bpgui->showPage();             
                
                if($a_truncate)
                {
                        $page = ilPageObject::truncateHTML($page, $a_truncate_length, $a_truncate_sign);                
                }
                
                if($img)
                {
                        $page = '<div>'.$img.$page.'</div><div style="clear:both;"></div>';                     
                }
        
                return $page;                           
        }
        
        protected function getFirstMediaObjectAsTag($a_width = 144, $a_height = 144, $a_export_directory = null)
        {
                $this->obj->buildDom();
                $mob_ids = $this->obj->collectMediaObjects();
                if($mob_ids)
                {
                        require_once("./Services/MediaObjects/classes/class.ilObjMediaObject.php");
                        foreach($mob_ids as $mob_id)
                        {                               
                                $mob_obj = new ilObjMediaObject($mob_id);
                                $mob_item = $mob_obj->getMediaItem("Standard");
                                if(stristr($mob_item->getFormat(), "image"))
                                {                               
                                        $mob_size = $mob_item->getOriginalSize();
                                        if($mob_size["width"] >= $a_width ||
                                                $mob_size["height"] >= $a_height)
                                        {
                                                if(!$a_export_directory)
                                                {
                                                        $mob_dir = ilObjMediaObject::_getDirectory($mob_obj->getId());
                                                }
                                                else
                                                {
                                                        // see ilCOPageHTMLExport::exportHTMLMOB()
                                                        $mob_dir = "./mobs/mm_".$mob_obj->getId();
                                                }                                               
                                                $mob_res = self::parseImage($mob_size["width"],
                                                        $mob_size["height"], $a_width, $a_height);


                                                $location = $mob_item->getLocationType() == "Reference"
                                                        ? $mob_item->getLocation()
                                                        : $mob_dir."/".$mob_item->getLocation();
                                                
                                                return '<img'.
                                                        ' src="'.$location.'"'.
                                                        ' width="'.$mob_res[0].'"'.
                                                        ' height="'.$mob_res[1].'"'.
                                                        ' class="ilBlogListItemSnippetPreviewImage ilFloatLeft noMirror"'.
                                                        ' />';
                                        }
                                }
                        }
                }
        }
        
        protected static function parseImage($src_width, $src_height, $tgt_width, $tgt_height)
        {       
                $ratio_width = $ratio_height = 1;
                if($src_width > $tgt_width)
                {
                        $ratio_width = $tgt_width / $src_width;
                }       
                if($src_height > $tgt_height)
                {
                        $ratio_height = $tgt_height / $src_height;
                }                       
                $shrink_ratio = min($ratio_width, $ratio_height);
                                                
                return array(
                        (int)round($src_width*$shrink_ratio), 
                        (int)round($src_height*$shrink_ratio)
                );
        }       
}

?>