class.ilObjBlogGUI.php

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<?php

use ILIAS\GlobalScreen\ScreenContext\ContextServices;
use ILIAS\Blog\StandardGUIRequest;

class ilObjBlogGUI extends ilObject2GUI implements ilDesktopItemHandling
{
    protected string $rendered_content = "";
    protected \ILIAS\Notes\Service $notes;
    protected \ILIAS\Blog\ReadingTime\BlogSettingsGUI $reading_time_gui;
    protected \ILIAS\Blog\ReadingTime\ReadingTimeManager $reading_time_manager;

    protected StandardGUIRequest $blog_request;
    protected ilHelpGUI $help;
    protected ilTabsGUI $tabs;
    protected ilNavigationHistory $nav_history;
    protected ilRbacAdmin $rbacadmin;

    protected string $month = "";
    protected array $items = [];
    protected string $keyword = "";
    protected ?int $author = null;
    protected bool $month_default = false;
    protected int $gtp = 0;
    protected string $edt;
    protected int $blpg = 0;
    protected int $old_nr = 0;
    protected int $ppage = 0;
    protected int $user_page = 0;
    public bool $prtf_embed = false; // note: this is currently set in ilPortfolioPageGUI, should use getter/setter
    protected string $prvm; //preview mode (fsc|emb)
    protected int $ntf = 0;
    protected int $apid = 0;
    protected string $new_type = "";
    protected int $prt_id = 0;
    protected bool $disable_notes = false;
    protected ContextServices $tool_context;
    protected \ILIAS\HTTP\Services $http;
    protected \ILIAS\DI\UIServices $ui;
    protected \ILIAS\Style\Content\GUIService $content_style_gui;
    protected \ILIAS\Style\Content\Object\ObjectFacade $content_style_domain;

    public function __construct(
        int $a_id = 0,
        int $a_id_type = self::REPOSITORY_NODE_ID,
        int $a_parent_node_id = 0
    ) {
        global $DIC;

        $this->settings = $DIC->settings();
        $this->help = $DIC["ilHelp"];
        $this->tabs = $DIC->tabs();
        $this->nav_history = $DIC["ilNavigationHistory"];
        $this->user = $DIC->user();
        $this->toolbar = $DIC->toolbar();
        $this->tree = $DIC->repositoryTree();
        $this->locator = $DIC["ilLocator"];
        $this->rbac_review = $DIC->rbac()->review();
        $this->rbacadmin = $DIC->rbac()->admin();
        $this->http = $DIC->http();
        $this->ui = $DIC->ui();

        $lng = $DIC->language();
        $ilCtrl = $DIC->ctrl();

        $this->blog_request = $DIC->blog()
            ->internal()
            ->gui()
            ->standardRequest();

        $req = $this->blog_request;

        $this->gtp = $req->getGotoPage();
        $this->edt = $req->getEditing();
        $this->blpg = $req->getBlogPage();
        $this->old_nr = $req->getOldNr();
        $this->ppage = $req->getPPage();
        $this->user_page = $req->getUserPage();
        $this->new_type = $req->getNewType();
        $this->prvm = $req->getPreviewMode();
        $this->ntf = $req->getNotification();
        $this->apid = $req->getApId();
        $this->month = $req->getMonth();
        $this->keyword = $req->getKeyword();
        $this->author = $req->getAuthor();
        $this->prt_id = $req->getPrtId();

        $this->tool_context = $DIC->globalScreen()->tool()->context();

        parent::__construct($a_id, $a_id_type, $a_parent_node_id);

        $blog_page = $this->blog_request->getBlogPage();
        if ($blog_page > 0 &&
            ilBlogPosting::lookupBlogId($blog_page) !== $this->object->getId()) {
            throw new ilException("Posting ID does not match blog.");
        }

        $blog_id = 0;
        if ($this->object) {
            // gather postings by month
            $this->items = $this->buildPostingList($this->object->getId());
            if ($this->items) {
                // current month (if none given or empty)
                if (!$this->month || !$this->items[$this->month]) {
                    $m = array_keys($this->items);
                    $this->month = array_shift($m);
                    $this->month_default = true;
                }
            }

            $ilCtrl->setParameter($this, "bmn", $this->month);
            $blog_id = $this->object->getId();
        }

        $lng->loadLanguageModule("blog");
        $ilCtrl->saveParameter($this, "prvm");

        $cs = $DIC->contentStyle();
        $this->content_style_gui = $cs->gui();
        if (is_object($this->object)) {
            if ($this->id_type !== self::REPOSITORY_NODE_ID) {
                $this->content_style_domain = $cs->domain()->styleForObjId($this->object->getId());
            } else {
                $this->content_style_domain = $cs->domain()->styleForRefId($this->object->getRefId());
            }
        }

        $this->reading_time_gui = new \ILIAS\Blog\ReadingTime\BlogSettingsGUI($blog_id);
        $this->reading_time_manager = new \ILIAS\Blog\ReadingTime\ReadingTimeManager();
        $this->notes = $DIC->notes();
    }

    public function getType(): string
    {
        return "blog";
    }

    public function getItems(): array
    {
        return $this->items;
    }


    protected function initCreationForms(string $new_type): array
    {
        $forms = parent::initCreationForms($new_type);

        if ($this->id_type === self::WORKSPACE_NODE_ID) {
            unset($forms[self::CFORM_IMPORT], $forms[self::CFORM_CLONE]);
        }

        return $forms;
    }

    protected function afterSave(ilObject $new_object): void
    {
        $ilCtrl = $this->ctrl;

        $this->tpl->setOnScreenMessage('success', $this->lng->txt("object_added"), true);
        $ilCtrl->redirect($this, "");
    }

    protected function setSettingsSubTabs(string $a_active): void
    {
        global $DIC;

        $tree = $DIC->repositoryTree();
        $access = $DIC->access();

        // general properties
        $this->tabs_gui->addSubTab(
            "properties",
            $this->lng->txt("blog_properties"),
            $this->ctrl->getLinkTarget($this, 'edit')
        );

        $this->tabs_gui->addSubTab(
            "style",
            $this->lng->txt("obj_sty"),
            $this->ctrl->getLinkTargetByClass("ilobjectcontentstylesettingsgui", "")
        );

        // notification settings for blogs in courses and groups
        if ($this->id_type === self::REPOSITORY_NODE_ID) {
            $grp_ref_id = $tree->checkForParentType($this->object->getRefId(), 'grp');
            $crs_ref_id = $tree->checkForParentType($this->object->getRefId(), 'crs');

            if ($grp_ref_id > 0 || $crs_ref_id > 0) {
                if ($access->checkAccess('write', '', $this->ref_id)) {
                    $this->tabs_gui->addSubTab(
                        'notifications',
                        $this->lng->txt("notifications"),
                        $this->ctrl->getLinkTargetByClass("ilobjnotificationsettingsgui", '')
                    );
                }
            }
        }

        $this->tabs_gui->activateSubTab($a_active);
    }

    protected function initEditCustomForm(
        ilPropertyFormGUI $a_form
    ): void {
        $lng = $this->lng;
        $ilSetting = $this->settings;
        $obj_service = $this->getObjectService();

        $this->setSettingsSubTabs("properties");

        if ($this->id_type === self::REPOSITORY_NODE_ID) {
            $appr = new ilCheckboxInputGUI($lng->txt("blog_enable_approval"), "approval");
            $appr->setInfo($lng->txt("blog_enable_approval_info"));
            $a_form->addItem($appr);
        }

        $notes = new ilCheckboxInputGUI($lng->txt("blog_enable_notes"), "notes");
        $a_form->addItem($notes);

        if ($ilSetting->get('enable_global_profiles')) {
            $rss = new ilCheckboxInputGUI($lng->txt("blog_enable_rss"), "rss");
            $rss->setInfo($lng->txt("blog_enable_rss_info"));
            $a_form->addItem($rss);
        }


        // navigation

        $nav = new ilFormSectionHeaderGUI();
        $nav->setTitle($lng->txt("blog_settings_navigation"));
        $a_form->addItem($nav);

        $nav_mode = new ilRadioGroupInputGUI($lng->txt("blog_nav_mode"), "nav");
        $nav_mode->setRequired(true);
        $a_form->addItem($nav_mode);

        $opt = new ilRadioOption($lng->txt("blog_nav_mode_month_list"), ilObjBlog::NAV_MODE_LIST);
        $opt->setInfo($lng->txt("blog_nav_mode_month_list_info"));
        $nav_mode->addOption($opt);


        $mon_num = new ilNumberInputGUI($lng->txt("blog_nav_mode_month_list_num_month"), "nav_list_mon");
        $mon_num->setInfo($lng->txt("blog_nav_mode_month_list_num_month_info"));
        $mon_num->setSize(3);
        $mon_num->setMinValue(1);
        $opt->addSubItem($mon_num);

        $detail_num = new ilNumberInputGUI($lng->txt("blog_nav_mode_month_list_num_month_with_post"), "nav_list_mon_with_post");
        $detail_num->setInfo($lng->txt("blog_nav_mode_month_list_num_month_with_post_info"));
        //$detail_num->setRequired(true);
        $detail_num->setSize(3);
        //$detail_num->setMinValue(0);
        $opt->addSubItem($detail_num);

        $opt = new ilRadioOption($lng->txt("blog_nav_mode_month_single"), ilObjBlog::NAV_MODE_MONTH);
        $opt->setInfo($lng->txt("blog_nav_mode_month_single_info"));
        $nav_mode->addOption($opt);

        $order_options = array();
        if ($this->object->getOrder()) {
            foreach ($this->object->getOrder() as $item) {
                $order_options[] = $lng->txt("blog_" . $item);
            }
        }

        if (!in_array($lng->txt("blog_navigation"), $order_options)) {
            $order_options[] = $lng->txt("blog_navigation");
        }

        if ($this->id_type === self::REPOSITORY_NODE_ID) {
            if (!in_array($lng->txt("blog_authors"), $order_options)) {
                $order_options[] = $lng->txt("blog_authors");
            }

            $auth = new ilCheckboxInputGUI($lng->txt("blog_enable_nav_authors"), "nav_authors");
            $auth->setInfo($lng->txt("blog_enable_nav_authors_info"));
            $a_form->addItem($auth);
        }

        $keyw = new ilCheckboxInputGUI($lng->txt("blog_enable_keywords"), "keywords");
        $keyw->setInfo($lng->txt("blog_enable_keywords_info"));
        $a_form->addItem($keyw);

        if (!in_array($lng->txt("blog_keywords"), $order_options)) {
            $order_options[] = $lng->txt("blog_keywords");
        }

        $order = new ilNonEditableValueGUI($lng->txt("blog_nav_sortorder"), "order");
        $order->setMultiValues($order_options);
        $order->setValue(array_shift($order_options));
        $order->setMulti(true, true, false);
        $a_form->addItem($order);


        // presentation (frame)

        $pres = new ilFormSectionHeaderGUI();
        $pres->setTitle($lng->txt("blog_presentation_frame"));
        $a_form->addItem($pres);

        if ($this->id_type === self::REPOSITORY_NODE_ID) {
            $obj_service->commonSettings()->legacyForm($a_form, $this->object)->addTileImage();
        }

        $ppic = new ilCheckboxInputGUI($lng->txt("blog_profile_picture"), "ppic");
        $a_form->addItem($ppic);

        if ($this->id_type === self::REPOSITORY_NODE_ID) {
            $ppic->setInfo($lng->txt("blog_profile_picture_repository_info"));
        }

        $blga_set = new ilSetting("blga");
        if ($blga_set->get("banner")) {
            $dimensions = " (" . $blga_set->get("banner_width") . "x" .
                $blga_set->get("banner_height") . ")";

            $img = new ilImageFileInputGUI($lng->txt("blog_banner") . $dimensions, "banner");
            $a_form->addItem($img);

            // show existing file
            $file = $this->object->getImageFullPath(true);
            if ($file) {
                $img->setImage(ilWACSignedPath::signFile($file));
            }
        }

        $this->reading_time_gui->addSettingToForm($a_form);

        /* #15000
        $bg_color = new ilColorPickerInputGUI($lng->txt("blog_background_color"), "bg_color");
        $a_form->addItem($bg_color);

        $font_color = new ilColorPickerInputGUI($lng->txt("blog_font_color"), "font_color");
        $a_form->addItem($font_color);
        */

        // presentation (overview)

        $list = new ilFormSectionHeaderGUI();
        $list->setTitle($lng->txt("blog_presentation_overview"));
        $a_form->addItem($list);


        $post_num = new ilNumberInputGUI($lng->txt("blog_list_num_postings"), "ov_list_post_num");
        $post_num->setInfo($lng->txt("blog_list_num_postings_info"));
        $post_num->setSize(3);
        $post_num->setMinValue(1);
        $post_num->setRequired(true);
        $a_form->addItem($post_num);

        $abs_shorten = new ilCheckboxInputGUI($lng->txt("blog_abstract_shorten"), "abss");
        $a_form->addItem($abs_shorten);

        $abs_shorten_len = new ilNumberInputGUI($lng->txt("blog_abstract_shorten_length"), "abssl");
        $abs_shorten_len->setSize(5);
        $abs_shorten_len->setRequired(true);
        $abs_shorten_len->setSuffix($lng->txt("blog_abstract_shorten_characters"));
        $abs_shorten_len->setMinValue(50, true);
        $abs_shorten->addSubItem($abs_shorten_len);

        $abs_img = new ilCheckboxInputGUI($lng->txt("blog_abstract_image"), "absi");
        $abs_img->setInfo($lng->txt("blog_abstract_image_info"));
        $a_form->addItem($abs_img);

        $abs_img_width = new ilNumberInputGUI($lng->txt("blog_abstract_image_width"), "absiw");
        $abs_img_width->setSize(5);
        $abs_img_width->setRequired(true);
        $abs_img_width->setSuffix($lng->txt("blog_abstract_image_pixels"));
        $abs_img_width->setMinValue(32, true);
        $abs_img->addSubItem($abs_img_width);

        $abs_img_height = new ilNumberInputGUI($lng->txt("blog_abstract_image_height"), "absih");
        $abs_img_height->setSize(5);
        $abs_img_height->setRequired(true);
        $abs_img_height->setSuffix($lng->txt("blog_abstract_image_pixels"));
        $abs_img_height->setMinValue(32, true);
        $abs_img->addSubItem($abs_img_height);
    }

    protected function getEditFormCustomValues(array &$a_values): void
    {
        if ($this->id_type === self::REPOSITORY_NODE_ID) {
            $a_values["approval"] = $this->object->hasApproval();
            $a_values["nav_authors"] = $this->object->hasAuthors();
        }
        $a_values["keywords"] = $this->object->hasKeywords();
        $a_values["notes"] = $this->object->getNotesStatus();
        $a_values["ppic"] = $this->object->hasProfilePicture();
        /*
        $a_values["bg_color"] = $this->object->getBackgroundColor();
        $a_values["font_color"] = $this->object->getFontColor();
        */
        $a_values["banner"] = $this->object->getImage();
        $a_values["rss"] = $this->object->hasRSS();
        $a_values["abss"] = $this->object->hasAbstractShorten();
        $a_values["absi"] = $this->object->hasAbstractImage();
        $a_values["nav"] = $this->object->getNavMode();
        $a_values["nav_list_mon_with_post"] = $this->object->getNavModeListMonthsWithPostings();
        $a_values["nav_list_mon"] = $this->object->getNavModeListMonths();
        $a_values["ov_list_post_num"] = $this->object->getOverviewPostings();

        // #13420
        $a_values["abssl"] = $this->object->getAbstractShortenLength() ?: ilObjBlog::ABSTRACT_DEFAULT_SHORTEN_LENGTH;
        $a_values["absiw"] = $this->object->getAbstractImageWidth() ?: ilObjBlog::ABSTRACT_DEFAULT_IMAGE_WIDTH;
        $a_values["absih"] = $this->object->getAbstractImageHeight() ?: ilObjBlog::ABSTRACT_DEFAULT_IMAGE_HEIGHT;
        $a_values = $this->reading_time_gui->addValueToArray($a_values);
    }

    protected function updateCustom(ilPropertyFormGUI $form): void
    {
        $lng = $this->lng;
        $obj_service = $this->getObjectService();

        if ($this->id_type === self::REPOSITORY_NODE_ID) {
            $this->object->setApproval($form->getInput("approval"));
            $this->object->setAuthors($form->getInput("nav_authors"));
            $obj_service->commonSettings()->legacyForm($form, $this->object)->saveTileImage();
        }
        $this->object->setKeywords($form->getInput("keywords"));
        $this->object->setNotesStatus($form->getInput("notes"));
        $this->object->setProfilePicture($form->getInput("ppic"));
        $this->object->setRSS($form->getInput("rss"));
        $this->object->setAbstractShorten($form->getInput("abss"));
        $this->object->setAbstractShortenLength($form->getInput("abssl"));
        $this->object->setAbstractImage($form->getInput("absi"));
        $this->object->setAbstractImageWidth($form->getInput("absiw"));
        $this->object->setAbstractImageHeight($form->getInput("absih"));
        $this->object->setNavMode($form->getInput("nav"));
        $this->object->setNavModeListMonthsWithPostings($form->getInput("nav_list_mon_with_post"));
        $this->object->setNavModeListMonths($form->getInput("nav_list_mon"));
        $this->object->setOverviewPostings($form->getInput("ov_list_post_num"));
        $this->reading_time_gui->saveSettingFromForm($form);

        $order = (array) $form->getInput("order");

        foreach ($order as $idx => $value) {
            if ($value == $lng->txt("blog_navigation")) {
                $order[$idx] = "navigation";
            } elseif ($value == $lng->txt("blog_keywords")) {
                $order[$idx] = "keywords";
            } else {
                $order[$idx] = "authors";
            }
        }
        $this->object->setOrder($order);
        // banner field is optional
        $banner = $form->getItemByPostVar("banner");
        if ($banner) {
            if ($_FILES["banner"]["tmp_name"]) {
                $this->object->uploadImage($_FILES["banner"]);
            } elseif ($banner->getDeletionFlag()) {
                $this->object->deleteImage();
            }
        }
    }

    protected function setTabs(): void
    {
        $lng = $this->lng;
        $ilHelp = $this->help;

        if ($this->id_type === self::WORKSPACE_NODE_ID) {
            $this->ctrl->setParameter($this, "wsp_id", $this->node_id);
        }

        $ilHelp->setScreenIdComponent("blog");

        if ($this->checkPermissionBool("read")) {
            $this->ctrl->setParameterByClass(self::class, "bmn", null);
            $this->tabs_gui->addTab(
                "content",
                $lng->txt("content"),
                $this->ctrl->getLinkTarget($this, "")
            );
        }
        if ($this->checkPermissionBool("read") && !$this->prtf_embed) {
            $this->tabs_gui->addTab(
                "id_info",
                $lng->txt("info_short"),
                $this->ctrl->getLinkTargetByClass(array("ilobjbloggui", "ilinfoscreengui"), "showSummary")
            );
        }

        if ($this->checkPermissionBool("write")) {
            $this->tabs_gui->addTab(
                "settings",
                $lng->txt("settings"),
                $this->ctrl->getLinkTarget($this, "edit")
            );

            if (!$this->prtf_embed) {
                if ($this->id_type === self::REPOSITORY_NODE_ID) {
                    $this->tabs_gui->addTab(
                        "contributors",
                        $lng->txt("blog_contributors"),
                        $this->ctrl->getLinkTarget($this, "contributors")
                    );
                }

                if ($this->id_type === self::REPOSITORY_NODE_ID) {
                    $this->tabs_gui->addTab(
                        "export",
                        $lng->txt("export"),
                        $this->ctrl->getLinkTargetByClass("ilexportgui", "")
                    );
                }
            }
        }

        if (!$this->prtf_embed) {
            if ($this->mayContribute()) {
                $this->tabs_gui->addNonTabbedLink(
                    "preview",
                    $lng->txt("blog_preview"),
                    $this->ctrl->getLinkTarget($this, "preview")
                );
            }
            parent::setTabs();
        }
    }

    public function executeCommand(): void
    {
        $ilCtrl = $this->ctrl;
        $tpl = $this->tpl;
        $ilTabs = $this->tabs;
        $lng = $this->lng;
        $ilNavigationHistory = $this->nav_history;


        $next_class = $ilCtrl->getNextClass($this);

        if ($next_class !== "ilexportgui") {
            $this->triggerAssignmentTool();
        }

        // goto link to blog posting
        if ($this->gtp > 0) {
            $page_id = $this->gtp;
            if (ilBlogPosting::exists($this->object_id, $page_id)) {
                // #12312
                $ilCtrl->setCmdClass("ilblogpostinggui");
                $ilCtrl->setParameterByClass("ilblogpostinggui", "blpg", $page_id);
                if ($this->edt === "edit") {
                    $ilCtrl->redirectByClass("ilblogpostinggui", "edit");
                } else {
                    $ilCtrl->redirectByClass("ilblogpostinggui", "previewFullscreen");
                }
            } else {
                $this->tpl->setOnScreenMessage('failure', $lng->txt("blog_posting_not_found"));
            }
        }


        $cmd = $ilCtrl->getCmd();

        // add entry to navigation history
        if (($this->id_type === self::REPOSITORY_NODE_ID) && !$this->getCreationMode() &&
            $this->getAccessHandler()->checkAccess("read", "", $this->node_id)) {
            // see #22067
            $link = $ilCtrl->getLinkTargetByClass(["ilrepositorygui", "ilObjBlogGUI"], "preview");
            $ilNavigationHistory->addItem($this->node_id, $link, "blog");
        }
        switch ($next_class) {
            case 'ilblogpostinggui':
                $this->ctrl->saveParameter($this, "user_page");
                if (!$this->prtf_embed) {
                    $tpl->loadStandardTemplate();
                }

                if (!$this->checkPermissionBool("read") && !$this->prtf_embed) {
                    $this->tpl->setOnScreenMessage('info', $lng->txt("no_permission"));
                    return;
                }

                // #9680
                if ($this->id_type === self::REPOSITORY_NODE_ID) {
                    $this->setLocator();
                }

                $style_sheet_id = $this->content_style_domain->getEffectiveStyleId();

                $bpost_gui = new ilBlogPostingGUI(
                    $this->node_id,
                    $this->getAccessHandler(),
                    $this->blpg,
                    $this->old_nr,
                    ($this->object->getNotesStatus() && !$this->disable_notes),
                    $this->mayEditPosting($this->blpg),
                    $style_sheet_id
                );

                // keep preview mode through notes gui (has its own commands)
                switch ($cmd) {
                    // blog preview
                    case "previewFullscreen":
                        $ilCtrl->setParameter($this, "prvm", "fsc");
                        break;

                        // blog in portfolio
                    case "previewEmbedded":
                        $ilCtrl->setParameter($this, "prvm", "emb");
                        break;

                        // edit
                    default:
                        $this->setContentStyleSheet();


                        if (!$this->prtf_embed) {
                            $this->ctrl->setParameterByClass("ilblogpostinggui", "blpg", $this->blpg);
                            $this->tabs_gui->addNonTabbedLink(
                                "preview",
                                $lng->txt("blog_preview"),
                                $this->ctrl->getLinkTargetByClass("ilblogpostinggui", "previewFullscreen")
                            );
                            $this->ctrl->setParameterByClass("ilblogpostinggui", "blpg", "");
                        } else {
                            $this->ctrl->setParameterByClass("ilobjportfoliogui", "user_page", $this->ppage);
                            $this->tabs_gui->addNonTabbedLink(
                                "preview",
                                $lng->txt("blog_preview"),
                                $this->ctrl->getLinkTargetByClass("ilobjportfoliogui", "preview")
                            );
                            $this->ctrl->setParameterByClass("ilobjportfoliogui", "user_page", "");
                        }
                        break;
                }

                // keep preview mode through notes gui
                if ($this->prvm) {
                    $cmd = "preview" . (($this->prvm === "fsc") ? "Fullscreen" : "Embedded");
                }
                if (in_array($cmd, array("previewFullscreen", "previewEmbedded"))) {
                    $this->renderToolbarNavigation($this->items, true);
                }
                $ret = $ilCtrl->forwardCommand($bpost_gui);
                if (!$ilTabs->back_target) {
                    $ilCtrl->setParameter($this, "bmn", "");
                    $ilTabs->setBackTarget(
                        $lng->txt("back"),
                        $ilCtrl->getLinkTarget($this, "")
                    );
                }

                if ($ret != "") {

                    // $is_owner = $this->object->getOwner() == $ilUser->getId();
                    $is_owner = $this->mayContribute();
                    $is_active = $bpost_gui->getBlogPosting()->getActive();

                    // do not show inactive postings
                    if (($cmd === "previewFullscreen" || $cmd === "previewEmbedded")
                        && !$is_owner && !$is_active) {
                        $this->ctrl->redirect($this, "preview");
                    }

                    switch ($cmd) {
                        // blog preview
                        case "previewFullscreen":
                            $this->addHeaderActionForCommand($cmd);
                            $this->filterInactivePostings();
                            $nav = $this->renderNavigation("preview", $cmd);
                            $this->renderFullScreen($ret, $nav);
                            break;

                            // blog in portfolio
                        case "previewEmbedded":
                            $this->addHeaderActionForCommand($cmd);
                            $this->filterInactivePostings();
                            $nav = $this->renderNavigation("gethtml", $cmd);
                            // this is important for embedded blog pages!
                            $this->rendered_content = $this->buildEmbedded($ret, $nav);
                            return;

                            // ilias/editor
                        default:
                            // infos about draft status / snippet
                            $info = array();
                            if (!$is_active) {
                                // single author blog (owner) in personal workspace
                                if ($this->id_type === self::WORKSPACE_NODE_ID) {
                                    $info[] = $lng->txt("blog_draft_info");
                                } else {
                                    $info[] = $lng->txt("blog_draft_info_contributors");
                                }
                            }
                            $public_action = false;
                            if ($cmd !== "history" && $cmd !== "edit" && $is_active && empty($info)) {
                                $info[] = $lng->txt("blog_new_posting_info");
                                $public_action = true;
                            }
                            if ($this->object->hasApproval() && !$bpost_gui->getBlogPosting()->isApproved()) {
                                // #9737
                                $info[] = $lng->txt("blog_posting_edit_approval_info");
                            }
                            if ($public_action) {
                                $this->tpl->setOnScreenMessage('success', implode("<br />", $info));
                            } else {
                                if (count($info) > 0) {
                                    $this->tpl->setOnScreenMessage('info', implode("<br />", $info));
                                }
                            }

                            // revert to edit cmd to avoid confusion
                            $tpl->setContent($ret);
                            if ($cmd !== "edit") {
                                $this->addHeaderActionForCommand("render");
                                $nav = $this->renderNavigation("render", $cmd, "", $is_owner);
                                $tpl->setRightContent($nav);
                            } else {
                                $this->tabs->setBackTarget("", "");
                            }
                            break;
                    }
                }
                break;

            case "ilinfoscreengui":
                $this->prepareOutput();
                $this->addHeaderActionForCommand("render");
                $this->infoScreenForward();
                break;

            case "ilnotegui":
                $this->preview();
                break;

            case "ilcommonactiondispatchergui":
                $gui = ilCommonActionDispatcherGUI::getInstanceFromAjaxCall();
                $gui->enableCommentsSettings(false);
                $this->prepareOutput();
                $this->ctrl->forwardCommand($gui);
                break;

            case "ilpermissiongui":
                $this->prepareOutput();
                $ilTabs->activateTab("id_permissions");
                $perm_gui = new ilPermissionGUI($this);
                $this->ctrl->forwardCommand($perm_gui);
                break;

            case "ilobjectcopygui":
                $this->prepareOutput();
                $cp = new ilObjectCopyGUI($this);
                $cp->setType("blog");
                $this->ctrl->forwardCommand($cp);
                break;

            case 'ilrepositorysearchgui':
                $this->prepareOutput();
                $ilTabs->activateTab("contributors");
                $rep_search = new ilRepositorySearchGUI();
                $rep_search->setTitle($this->lng->txt("blog_add_contributor"));
                $rep_search->setCallback($this, 'addContributor', $this->object->getAllLocalRoles($this->node_id));
                $this->ctrl->setReturn($this, 'contributors');
                $this->ctrl->forwardCommand($rep_search);
                break;

            case 'ilexportgui':
                $this->prepareOutput();
                $ilTabs->activateTab("export");
                $exp_gui = new ilExportGUI($this);
                $exp_gui->addFormat("xml");
                $exp_gui->addFormat("html", "", $this, "buildExportFile"); // #13419
                if (ilObjBlogAccess::isCommentsExportPossible($this->object->getId())) {
                    $exp_gui->addFormat("html_comments", "HTML (" . $this->lng->txt("blog_incl_comments") . ")", $this, "buildExportFile");
                }
                $ilCtrl->forwardCommand($exp_gui);
                break;

            case "ilobjectcontentstylesettingsgui":
                $this->checkPermission("write");
                $this->prepareOutput();
                $this->addHeaderAction();
                $ilTabs->activateTab("settings");
                $this->setSettingsSubTabs("style");


                if ($this->id_type === self::REPOSITORY_NODE_ID) {
                    $settings_gui = $this->content_style_gui
                        ->objectSettingsGUIForRefId(
                            null,
                            $this->object->getRefId()
                        );
                } else {
                    $settings_gui = $this->content_style_gui
                        ->objectSettingsGUIForObjId(
                            null,
                            $this->object->getId()
                        );
                }
                $this->ctrl->forwardCommand($settings_gui);
                break;


            case "ilblogexercisegui":
                $this->ctrl->setReturn($this, "render");
                $gui = new ilBlogExerciseGUI($this->node_id);
                $this->ctrl->forwardCommand($gui);
                break;

            case 'ilobjnotificationsettingsgui':
                $this->prepareOutput();
                $ilTabs->activateTab("settings");
                $this->setSettingsSubTabs("notifications");
                $gui = new ilObjNotificationSettingsGUI($this->object->getRefId());
                $this->ctrl->forwardCommand($gui);
                break;

            default:
                if ($cmd !== "gethtml") {
                    // desktop item handling, must be toggled before header action
                    if ($cmd === "addToDesk" || $cmd === "removeFromDesk") {
                        $this->{$cmd . "Object"}();
                        if ($this->prvm) {
                            $cmd = "preview";
                        } else {
                            $cmd = "render";
                        }
                        $ilCtrl->setCmd($cmd);
                    }
                    $this->addHeaderActionForCommand($cmd);
                }
                if (!$this->prtf_embed) {
                    parent::executeCommand();
                    return;
                }

                $this->setTabs();

                if (!$cmd) {
                    $cmd = "render";
                }
                $this->rendered_content = (string) $this->$cmd();
        }
    }

    public function getRenderedContent(): string
    {
        return $this->rendered_content;
    }

    protected function triggerAssignmentTool(): void
    {
        $be = new ilBlogExercise($this->node_id);
        $be_gui = new ilBlogExerciseGUI($this->node_id);
        $assignments = $be->getAssignmentsOfBlog();
        if (count($assignments) > 0) {
            $ass_ids = array_map(static function ($i) {
                return $i["ass_id"];
            }, $assignments);
            $this->tool_context->current()->addAdditionalData(ilExerciseGSToolProvider::SHOW_EXC_ASSIGNMENT_INFO, true);
            $this->tool_context->current()->addAdditionalData(ilExerciseGSToolProvider::EXC_ASS_IDS, $ass_ids);
            $this->tool_context->current()->addAdditionalData(
                ilExerciseGSToolProvider::EXC_ASS_BUTTONS,
                $be_gui->getActionButtons()
            );
        }
    }

    public function infoScreen(): void
    {
        $this->ctrl->setCmd("showSummary");
        $this->ctrl->setCmdClass("ilinfoscreengui");
        $this->infoScreenForward();
    }

    public function infoScreenForward(): void
    {
        $ilTabs = $this->tabs;

        $ilTabs->activateTab("id_info");

        $this->checkPermission("visible");

        $info = new ilInfoScreenGUI($this);

        if ($this->id_type !== self::WORKSPACE_NODE_ID) {
            $info->enablePrivateNotes();
        }

        if ($this->checkPermissionBool("read")) {
            $info->enableNews();
        }

        // no news editing for files, just notifications
        $info->enableNewsEditing(false);
        if ($this->checkPermissionBool("write")) {
            $news_set = new ilSetting("news");
            $enable_internal_rss = $news_set->get("enable_rss_for_internal");

            if ($enable_internal_rss) {
                $info->setBlockProperty("news", "settings", true);
                $info->setBlockProperty("news", "public_notifications_option", true);
            }
        }

        // standard meta data
        $info->addMetaDataSections($this->object->getId(), 0, $this->object->getType());

        if ($this->id_type === self::WORKSPACE_NODE_ID) {
            $info->addProperty($this->lng->txt("perma_link"), $this->getPermanentLinkWidget());
        }

        $this->ctrl->forwardCommand($info);
    }

    public function createPosting(): void
    {
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;

        $title = $this->blog_request->getTitle();
        if ($title) {
            // create new posting
            $posting = new ilBlogPosting();
            $posting->setTitle($title);
            $posting->setBlogId($this->object->getId());
            $posting->setActive(false);
            $posting->setAuthor($ilUser->getId());
            $posting->create(false);

            // switch month list to current month (will include new posting)
            $ilCtrl->setParameter($this, "bmn", date("Y-m"));

            $ilCtrl->setParameterByClass("ilblogpostinggui", "blpg", $posting->getId());
            $ilCtrl->redirectByClass("ilblogpostinggui", "edit");
        } else {
            $this->tpl->setOnScreenMessage('failure', $this->lng->txt("msg_no_title"), true);
            $ilCtrl->redirect($this, "render");
        }
    }

    public function render(): void
    {
        $tpl = $this->tpl;
        $ilTabs = $this->tabs;
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        $ilToolbar = new ilToolbarGUI();

        if (!$this->checkPermissionBool("read")) {
            $this->tpl->setOnScreenMessage('info', $lng->txt("no_permission"));
            return;
        }

        $ilTabs->activateTab("content");

        // toolbar
        if ($this->mayContribute()) {
            $ilToolbar->setFormAction($ilCtrl->getFormAction($this, "createPosting"));

            $title = new ilTextInputGUI($lng->txt("title"), "title");
            $title->setSize(30);
            $ilToolbar->addStickyItem($title, $lng->txt("title"));
            $tpl->addOnLoadCode("
                document.getElementById('title').setAttribute('data-blog-input', 'posting-title');
                document.getElementById('title').setAttribute('placeholder', ' ');
            ");

            $button = ilSubmitButton::getInstance();
            $button->setCaption("blog_add_posting");
            $button->setCommand("createPosting");
            $ilToolbar->addStickyItem($button);

            // #18763
            $keys = array_keys($this->items);
            $first = array_shift($keys);
            if ($first != $this->month) {
                $ilToolbar->addSeparator();

                $ilCtrl->setParameter($this, "bmn", $first);
                $url = $ilCtrl->getLinkTarget($this, "");
                $ilCtrl->setParameter($this, "bmn", $this->month);

                $button = ilLinkButton::getInstance();
                $button->setCaption("blog_show_latest");
                $button->setUrl($url);
                $ilToolbar->addButtonInstance($button);
            }

            // print/pdf
            $print_view = $this->getPrintView();
            $modal_elements = $print_view->getModalElements(
                $this->ctrl->getLinkTarget(
                    $this,
                    "printViewSelection"
                )
            );
            $ilToolbar->addSeparator();
            $ilToolbar->addComponent($modal_elements->button);
            $ilToolbar->addComponent($modal_elements->modal);
        }

        // $is_owner = ($this->object->getOwner() == $ilUser->getId());
        $is_owner = $this->mayContribute();

        $list_items = $this->getListItems($is_owner);

        $list = $nav = "";
        if ($list_items) {
            $list = $this->renderList($list_items, "preview", "", $is_owner);
            $nav = $this->renderNavigation("render", "edit", "", $is_owner);
        }

        $this->setContentStyleSheet();

        $tpl->setContent($ilToolbar->getHTML() . $list);
        $tpl->setRightContent($nav);
    }

    public function getHTML(): string
    {
        $ilUser = $this->user;
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;

        // getHTML() is called by ilRepositoryGUI::show()
        if ($this->id_type === self::REPOSITORY_NODE_ID) {
            return "";
        }

        // there is no way to do a permissions check here, we have no wsp

        $this->filterInactivePostings();

        $list_items = $this->getListItems();

        $list = $nav = "";
        if ($list_items) {
            $list = $this->renderList($list_items, "previewEmbedded");
            $nav = $this->renderNavigation("gethtml", "previewEmbedded");
        }
        // quick editing in portfolio
        elseif ($this->prt_id) {
            // see renderList()
            if (ilObject::_lookupOwner($this->prt_id) === $ilUser->getId()) {
                // see ilPortfolioPageTableGUI::fillRow()
                $ilCtrl->setParameterByClass("ilportfoliopagegui", "ppage", $this->user_page);
                $link = $ilCtrl->getLinkTargetByClass(array("ilportfoliopagegui", "ilobjbloggui"), "render");
                $ilCtrl->setParameterByClass("ilportfoliopagegui", "ppage", "");

                $this->toolbar->addComponent($this->ui->factory()->button()->standard(
                    $this->lng->txt("blog_edit"),
                    $link
                ));
            }
        }

        return $this->buildEmbedded($list, $nav);
    }

    protected function getListItems(
        bool $a_show_inactive = false
    ): array {
        if ($this->author) {
            $list_items = array();
            foreach ($this->items as $month => $items) {
                foreach ($items as $id => $item) {
                    if ($item["author"] == $this->author ||
                        (isset($item["editors"]) && in_array($this->author, $item["editors"]))) {
                        $list_items[$id] = $item;
                    }
                }
            }
        } elseif ($this->keyword) {
            $list_items = $this->filterItemsByKeyword($this->items, $this->keyword);
        } else {
            $max = $this->object->getOverviewPostings();
            if ($this->month_default && $max) {
                $list_items = array();
                foreach ($this->items as $month => $postings) {
                    foreach ($postings as $id => $item) {
                        if (!$a_show_inactive &&
                            !ilBlogPosting::_lookupActive($id, "blp")) {
                            continue;
                        }
                        $list_items[$id] = $item;

                        if (count($list_items) >= $max) {
                            break(2);
                        }
                    }
                }
            } else {
                $list_items = $this->items[$this->month] ?? [];
            }
        }
        return $list_items;
    }

    public function preview(): void
    {
        global $DIC;

        $lng = $DIC->language();
        $toolbar = $DIC->toolbar();

        if (!$this->checkPermissionBool("read")) {
            $this->tpl->setOnScreenMessage('info', $lng->txt("no_permission"));
            return;
        }

        $this->filterInactivePostings();

        $list_items = $this->getListItems();

        $list = $nav = "";
        if ($list_items) {
            $list = $this->renderList($list_items, "previewFullscreen");
            $nav = $this->renderNavigation("preview", "previewFullscreen");
            $this->renderToolbarNavigation($this->items);
            $list .= $toolbar->getHTML();
        }

        $this->renderFullScreen($list, $nav);
    }

    public function export(
        bool $a_with_comments = false
    ): void {
        $zip = $this->buildExportFile($a_with_comments);
        ilFileDelivery::deliverFileLegacy($zip, $this->object->getTitle() . ".zip", '', false, true);
    }


    // --- helper functions

    protected function buildEmbedded(
        string $a_content,
        string $a_nav
    ): string {
        $wtpl = new ilTemplate("tpl.blog_embedded.html", true, true, "Modules/Blog");
        $wtpl->setVariable("VAL_LIST", $a_content);
        $wtpl->setVariable("VAL_NAVIGATION", $a_nav);
        return $wtpl->get();
    }

    public function renderFullScreen(
        string $a_content,
        string $a_navigation
    ): void {
        $tpl = $this->tpl;
        $ilUser = $this->user;
        $ilTabs = $this->tabs;
        $ilLocator = $this->locator;

        $owner = $this->object->getOwner();

        $ilTabs->clearTargets();
        $tpl->setLocator();

        $back_caption = "";
        $back = "";

        // back (edit)
        if ($owner === $ilUser->getId()) {
            // from shared/deeplink
            if ($this->id_type === self::WORKSPACE_NODE_ID) {
                $back = "ilias.php?baseClass=ilDashboardGUI&cmd=jumpToWorkspace&wsp_id=" . $this->node_id;
            }
            // from editor (#10073)
            elseif ($this->mayContribute()) {
                $this->ctrl->setParameter($this, "prvm", "");
                if ($this->blpg === 0) {
                    $back = $this->ctrl->getLinkTarget($this, "");
                } else {
                    $this->ctrl->setParameterByClass("ilblogpostinggui", "bmn", $this->month);
                    $this->ctrl->setParameterByClass("ilblogpostinggui", "blpg", $this->blpg);
                    $back = $this->ctrl->getLinkTargetByClass("ilblogpostinggui", "preview");
                }
                $this->ctrl->setParameter($this, "prvm", $this->prvm);
            }

            $back_caption = $this->lng->txt("blog_back_to_blog_owner");
        }
        // back
        elseif ($ilUser->getId() && $ilUser->getId() !== ANONYMOUS_USER_ID) {
            // workspace (always shared)
            if ($this->id_type === self::WORKSPACE_NODE_ID) {
                $back = "ilias.php?baseClass=ilDashboardGUI&cmd=jumpToWorkspace&dsh=" . $owner;
            }
            // contributor
            elseif ($this->mayContribute()) {
                $back = $this->ctrl->getLinkTarget($this, "");
                $back_caption = $this->lng->txt("blog_back_to_blog_owner");
            }
            // listgui / parent container
            else {
                $tree = $this->tree;
                $parent_id = $tree->getParentId($this->node_id);
                $back = ilLink::_getStaticLink($parent_id);
            }
        }

        $this->renderFullscreenHeader($tpl, $owner);

        // #13564
        $this->ctrl->setParameter($this, "bmn", "");
        //$tpl->setTitleUrl($this->ctrl->getLinkTarget($this, "preview"));
        $this->ctrl->setParameter($this, "bmn", $this->month);

        $this->setContentStyleSheet();

        // content
        $tpl->setContent($a_content);
        $tpl->setRightContent($a_navigation);
    }

    public function renderFullscreenHeader(
        ilGlobalTemplateInterface $a_tpl,
        int $a_user_id,
        bool $a_export = false
    ): void {
        $ilUser = $this->user;

        if (!$a_export) {
            ilChangeEvent::_recordReadEvent(
                $this->object->getType(),
                $this->node_id,
                $this->object->getId(),
                $ilUser->getId()
            );
        }

        // repository blogs are multi-author
        $name = "";
        if ($this->id_type !== self::REPOSITORY_NODE_ID) {
            $name = ilObjUser::_lookupName($a_user_id);
            $name = $name["lastname"] . ", " . $name["firstname"];
        }

        // show banner?
        $banner = false;
        $blga_set = new ilSetting("blga");
        $banner_width = "";
        $banner_height = "";
        if ($blga_set->get("banner")) {
            $banner = ilWACSignedPath::signFile($this->object->getImageFullPath());
            $banner_width = $blga_set->get("banner_width");
            $banner_height = $blga_set->get("banner_height");
            if ($a_export) {
                $banner = basename($banner);
            }
        }

        $ppic = "";
        if ($this->object->hasProfilePicture()) {
            // repository (multi-user)
            if ($this->id_type === self::REPOSITORY_NODE_ID) {
                // #15030
                if ($this->blpg > 0 && !$a_export) {
                    $post = new ilBlogPosting($this->blpg);
                    $author_id = $post->getAuthor();
                    if ($author_id) {
                        $ppic = ilObjUser::_getPersonalPicturePath($author_id, "xsmall", true, true);

                        $name = ilObjUser::_lookupName($author_id);
                        $name = $name["lastname"] . ", " . $name["firstname"];
                    }
                }
            }
            // workspace (author == owner)
            else {
                $ppic = ilObjUser::_getPersonalPicturePath($a_user_id, "xsmall", true, true);
                if ($a_export) {
                    $ppic = basename($ppic);
                }
            }
        }

        $a_tpl->resetHeaderBlock(false);
        $a_tpl->setBanner($banner);
        $a_tpl->setTitleIcon($ppic);
        $a_tpl->setTitle($this->object->getTitle());
        if ($this->id_type === self::REPOSITORY_NODE_ID) {
            $a_tpl->setDescription($this->object->getDescription());
        } else {
            $a_tpl->setDescription($name);
        }
    }

    protected function buildPostingList(
        int $a_obj_id
    ): array {
        $author_found = false;

        $items = array();
        foreach (ilBlogPosting::getAllPostings($a_obj_id) as $posting) {
            if ($this->author &&
                ($posting["author"] == $this->author ||
                (is_array($posting["editors"] ?? false) && in_array($this->author, $posting["editors"])))) {
                $author_found = true;
            }

            $month = substr($posting["created"]->get(IL_CAL_DATE), 0, 7);
            $items[$month][$posting["id"]] = $posting;
        }

        if ($this->author && !$author_found) {
            $this->author = null;
        }

        return $items;
    }

    public function renderList(
        array $items,
        string $a_cmd = "preview",
        string $a_link_template = "",
        bool $a_show_inactive = false,
        string $a_export_directory = ""
    ): string {
        $lng = $this->lng;
        $ilCtrl = $this->ctrl;
        $ilUser = $this->user;

        $wtpl = new ilTemplate("tpl.blog_list.html", true, true, "Modules/Blog");

        // quick editing in portfolio
        if ($this->prt_id > 0 &&
            stripos($a_cmd, "embedded") !== false && ilObject::_lookupOwner($this->prt_id) === $ilUser->getId()) {
            // see ilPortfolioPageTableGUI::fillRow()
            $ilCtrl->setParameterByClass("ilportfoliopagegui", "ppage", $this->user_page);
            $link = $ilCtrl->getLinkTargetByClass(array("ilportfoliopagegui", "ilobjbloggui"), "render");
            $ilCtrl->setParameterByClass("ilportfoliopagegui", "ppage", "");
            $b = $this->ui->factory()->button()->standard(
                $this->lng->txt("blog_edit"),
                $link
            );
            $this->toolbar->addComponent($b);
        }

        $is_admin = $this->isAdmin();

        $last_month = null;
        $is_empty = true;
        foreach ($items as $item) {
            // only published items
            $is_active = ilBlogPosting::_lookupActive($item["id"], "blp");
            if (!$is_active && !$a_show_inactive) {
                continue;
            }

            $is_empty = false;

            $month = "";
            if (!$this->keyword && !$this->author) {
                $month = substr($item["created"]->get(IL_CAL_DATE), 0, 7);
            }

            if (!$last_month || $last_month != $month) {
                if ($last_month) {
                    $wtpl->setCurrentBlock("month_bl");
                    $wtpl->parseCurrentBlock();
                }

                // title according to current "filter"/navigation
                if ($this->keyword) {
                    $title = $lng->txt("blog_keyword") . ": " . $this->keyword;
                } elseif ($this->author) {
                    $title = $lng->txt("blog_author") . ": " . ilUserUtil::getNamePresentation($this->author);
                } else {
                    $title = ilCalendarUtil::_numericMonthToString((int) substr($month, 5)) .
                            " " . substr($month, 0, 4);

                    $last_month = $month;
                }

                $wtpl->setVariable("TXT_CURRENT_MONTH", $title);
            }

            if (!$a_link_template) {
                $ilCtrl->setParameterByClass("ilblogpostinggui", "bmn", $this->month);
                $ilCtrl->setParameterByClass("ilblogpostinggui", "blpg", $item["id"]);
                $preview = $ilCtrl->getLinkTargetByClass("ilblogpostinggui", $a_cmd);
            } else {
                $preview = $this->buildExportLink($a_link_template, "posting", $item["id"]);
            }
            $more_link = $preview;

            // actions
            $posting_edit = $this->mayEditPosting($item["id"], $item["author"]);
            if (($posting_edit || $is_admin) && !$a_link_template && $a_cmd === "preview") {
                $alist = new ilAdvancedSelectionListGUI();
                $alist->setId($item["id"]);
                $alist->setListTitle($lng->txt("actions"));

                if ($is_active && $this->object->hasApproval() && !$item["approved"]) {
                    if ($is_admin) {
                        $ilCtrl->setParameter($this, "apid", $item["id"]);
                        $alist->addItem(
                            $lng->txt("blog_approve"),
                            "approve",
                            $ilCtrl->getLinkTarget($this, "approve")
                        );
                        $ilCtrl->setParameter($this, "apid", "");
                    }

                    $wtpl->setVariable("APPROVAL", $lng->txt("blog_needs_approval"));
                }

                if ($posting_edit) {
                    $alist->addItem(
                        $lng->txt("edit_content"),
                        "edit",
                        $ilCtrl->getLinkTargetByClass("ilblogpostinggui", "edit")
                    );
                    $more_link = $ilCtrl->getLinkTargetByClass("ilblogpostinggui", "edit");

                    // #11858
                    if ($is_active) {
                        $alist->addItem(
                            $lng->txt("blog_toggle_draft"),
                            "deactivate",
                            $ilCtrl->getLinkTargetByClass("ilblogpostinggui", "deactivatePageToList")
                        );
                    } else {
                        $alist->addItem(
                            $lng->txt("blog_toggle_final"),
                            "activate",
                            $ilCtrl->getLinkTargetByClass("ilblogpostinggui", "activatePageToList")
                        );
                    }

                    $alist->addItem(
                        $lng->txt("rename"),
                        "rename",
                        $ilCtrl->getLinkTargetByClass("ilblogpostinggui", "edittitle")
                    );

                    if ($this->object->hasKeywords()) { // #13616
                        $alist->addItem(
                            $lng->txt("blog_edit_keywords"),
                            "keywords",
                            $ilCtrl->getLinkTargetByClass("ilblogpostinggui", "editKeywords")
                        );
                    }

                    $alist->addItem(
                        $lng->txt("blog_edit_date"),
                        "editdate",
                        $ilCtrl->getLinkTargetByClass("ilblogpostinggui", "editdate")
                    );
                    $alist->addItem(
                        $lng->txt("delete"),
                        "delete",
                        $ilCtrl->getLinkTargetByClass("ilblogpostinggui", "deleteBlogPostingConfirmationScreen")
                    );
                } elseif ($is_admin) {
                    // #10513
                    if ($is_active) {
                        $ilCtrl->setParameter($this, "apid", $item["id"]);
                        $alist->addItem(
                            $lng->txt("blog_toggle_draft_admin"),
                            "deactivate",
                            $ilCtrl->getLinkTarget($this, "deactivateAdmin")
                        );
                        $ilCtrl->setParameter($this, "apid", "");
                    }

                    $alist->addItem(
                        $lng->txt("delete"),
                        "delete",
                        $ilCtrl->getLinkTargetByClass("ilblogpostinggui", "deleteBlogPostingConfirmationScreen")
                    );
                }

                $wtpl->setCurrentBlock("actions");
                $wtpl->setVariable("ACTION_SELECTOR", $alist->getHTML());
                $wtpl->parseCurrentBlock();
            }

            // comments
            if ($this->object->getNotesStatus() && !$a_link_template && !$this->disable_notes) {
                // count (public) notes
                $notes_context = $this->notes
                    ->data()
                    ->context(
                        $this->obj_id,
                        (int) $item["id"],
                        "blp"
                    );
                $count = $this->notes
                    ->domain()
                    ->getNrOfCommentsForContext($notes_context);

                if ($a_cmd !== "preview") {
                    $wtpl->setCurrentBlock("comments");
                    $wtpl->setVariable("TEXT_COMMENTS", $lng->txt("blog_comments"));
                    $wtpl->setVariable("URL_COMMENTS", $preview);
                    $wtpl->setVariable("COUNT_COMMENTS", $count);
                    $wtpl->parseCurrentBlock();
                }
            }

            // permanent link
            if ($a_cmd !== "preview" && $a_cmd !== "previewEmbedded") {
                if ($this->id_type === self::WORKSPACE_NODE_ID) {
                    $goto = $this->getAccessHandler()->getGotoLink($this->node_id, $this->obj_id, "_" . $item["id"]);
                } else {
                    $goto = ilLink::_getStaticLink($this->node_id, $this->getType(), true, "_" . $item["id"]);
                }
                $wtpl->setCurrentBlock("permalink");
                $wtpl->setVariable("URL_PERMALINK", $goto);
                $wtpl->setVariable("TEXT_PERMALINK", $lng->txt("blog_link"));
                $wtpl->parseCurrentBlock();
            }

            $snippet = ilBlogPostingGUI::getSnippet(
                $item["id"],
                $this->object->hasAbstractShorten(),
                $this->object->getAbstractShortenLength(),
                "&hellip;",
                $this->object->hasAbstractImage(),
                $this->object->getAbstractImageWidth(),
                $this->object->getAbstractImageHeight(),
                $a_export_directory
            );

            if ($snippet) {
                $wtpl->setCurrentBlock("more");
                $wtpl->setVariable("URL_MORE", $more_link);
                $wtpl->setVariable("TEXT_MORE", $lng->txt("blog_list_more"));
                $wtpl->parseCurrentBlock();
            }



            if (!$is_active) {
                $wtpl->setCurrentBlock("draft_text");
                $wtpl->setVariable("DRAFT_TEXT", $lng->txt("blog_draft_text"));
                $wtpl->parseCurrentBlock();
                $wtpl->setVariable("DRAFT_CLASS", " ilBlogListItemDraft");
            }

            // reading time
            $reading_time = $this->reading_time_manager->getReadingTime(
                $this->object->getId(),
                $item["id"]
            );
            if (!is_null($reading_time)) {
                $this->lng->loadLanguageModule("copg");
                $wtpl->setCurrentBlock("reading_time");
                $wtpl->setVariable(
                    "READING_TIME",
                    $this->lng->txt("copg_est_reading_time") . ": " .
                    sprintf($this->lng->txt("copg_x_minutes"), $reading_time)
                );
                $wtpl->parseCurrentBlock();
            }

            $wtpl->setCurrentBlock("posting");

            $author = "";
            if ($this->id_type === self::REPOSITORY_NODE_ID) {
                $authors = array();

                $author_id = $item["author"];
                if ($author_id) {
                    $authors[] = ilUserUtil::getNamePresentation($author_id);
                }

                if (isset($item["editors"])) {
                    foreach ($item["editors"] as $editor_id) {
                        $authors[] = ilUserUtil::getNamePresentation($editor_id);
                    }
                }

                if ($authors) {
                    $author = implode(", ", $authors) . " - ";
                }
            }

            // title
            $wtpl->setVariable("URL_TITLE", $preview);
            $wtpl->setVariable("TITLE", $item["title"]);

            $kw = ilBlogPosting::getKeywords($this->obj_id, $item["id"]);
            natcasesort($kw);
            $keywords = (count($kw) > 0)
                ? "<br>" . $this->lng->txt("keywords") . ": " . implode(", ", $kw)
                : "";

            $wtpl->setVariable("DATETIME", $author .
                ilDatePresentation::formatDate($item["created"]) . $keywords);

            // content
            $wtpl->setVariable("CONTENT", $snippet);

            $wtpl->parseCurrentBlock();
        }

        // permalink
        if ($a_cmd === "previewFullscreen") {
            $this->tpl->setPermanentLink(
                "blog",
                $this->node_id,
                ($this->id_type === self::WORKSPACE_NODE_ID)
                ? "_wsp"
                : ""
            );
        }

        if (!$is_empty || $a_show_inactive) {
            return $wtpl->get();
        }
        return "";
    }

    protected function buildExportLink(
        string $a_template,
        string $a_type,
        string $a_id
    ): string {
        return \ILIAS\Blog\Export\BlogHtmlExport::buildExportLink($a_template, $a_type, $a_id, $this->getKeywords(false));
    }


    protected function renderNavigationByDate(
        array $a_items,
        string $a_list_cmd = "render",
        string $a_posting_cmd = "preview",
        ?string $a_link_template = null,
        bool $a_show_inactive = false,
        int $a_blpg = 0
    ): string {
        $ilCtrl = $this->ctrl;

        $blpg = ($a_blpg > 0)
            ? $a_blpg
            : $this->blpg;


        // gather page active status
        foreach ($a_items as $month => $postings) {
            foreach (array_keys($postings) as $id) {
                $active = ilBlogPosting::_lookupActive($id, "blp");
                if (!$a_show_inactive && !$active) {
                    unset($a_items[$month][$id]);
                } else {
                    $a_items[$month][$id]["active"] = $active;
                }
            }
            if (!count($a_items[$month])) {
                unset($a_items[$month]);
            }
        }

        // list month (incl. postings)
        if ($this->object->getNavMode() === ilObjBlog::NAV_MODE_LIST || $a_link_template) {
            //$max_detail_postings = $this->object->getNavModeListPostings();
            $max_months = $this->object->getNavModeListMonths();

            $wtpl = new ilTemplate("tpl.blog_list_navigation_by_date.html", true, true, "Modules/Blog");

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

            $counter = $mon_counter = $last_year = 0;
            foreach ($a_items as $month => $postings) {
                if (!$a_link_template && $max_months && $mon_counter >= $max_months) {
                    break;
                }

                $add_year = false;
                $year = substr($month, 0, 4);
                if (!$last_year || $year != $last_year) {
                    // #13562
                    $add_year = true;
                    $last_year = $year;
                }

                $mon_counter++;

                $month_name = ilCalendarUtil::_numericMonthToString((int) substr($month, 5));

                if (!$a_link_template) {
                    $ilCtrl->setParameter($this, "bmn", $month);
                    $month_url = $ilCtrl->getLinkTarget($this, $a_list_cmd);
                } else {
                    $month_url = $this->buildExportLink($a_link_template, "list", $month);
                }

                // list postings for month
                //if($counter < $max_detail_postings)
                if ($mon_counter <= $this->object->getNavModeListMonthsWithPostings()) {
                    if ($add_year) {
                        $wtpl->setCurrentBlock("navigation_year_details");
                        $wtpl->setVariable("YEAR", $year);
                        $wtpl->parseCurrentBlock();
                    }

                    foreach ($postings as $id => $posting) {
                        //if($max_detail_postings && $counter >= $max_detail_postings)
                        //{
                        //      break;
                        //}

                        $counter++;

                        $caption = /* ilDatePresentation::formatDate($posting["created"], IL_CAL_DATETIME).
                            ", ".*/ $posting["title"];

                        if (!$a_link_template) {
                            $ilCtrl->setParameterByClass("ilblogpostinggui", "bmn", $month);
                            $ilCtrl->setParameterByClass("ilblogpostinggui", "blpg", $id);
                            $url = $ilCtrl->getLinkTargetByClass("ilblogpostinggui", $a_posting_cmd);
                        } else {
                            $url = $this->buildExportLink($a_link_template, "posting", $id);
                        }

                        if (!$posting["active"]) {
                            $wtpl->setVariable("NAV_ITEM_DRAFT", $this->lng->txt("blog_draft"));
                        } elseif ($this->object->hasApproval() && !$posting["approved"]) {
                            $wtpl->setVariable("NAV_ITEM_APPROVAL", $this->lng->txt("blog_needs_approval"));
                        }

                        $wtpl->setCurrentBlock("navigation_item");
                        $wtpl->setVariable("NAV_ITEM_URL", $url);
                        $wtpl->setVariable("NAV_ITEM_CAPTION", $caption);
                        $wtpl->parseCurrentBlock();
                    }

                    $wtpl->setCurrentBlock("navigation_month_details");
                    $wtpl->setVariable("NAV_MONTH", $month_name);
                    $wtpl->setVariable("URL_MONTH", $month_url);
                }
                // summarized month
                else {
                    if ($add_year) {
                        $wtpl->setCurrentBlock("navigation_year");
                        $wtpl->setVariable("YEAR", $year);
                        $wtpl->parseCurrentBlock();
                    }

                    $wtpl->setCurrentBlock("navigation_month");
                    $wtpl->setVariable("MONTH_NAME", $month_name);
                    $wtpl->setVariable("URL_MONTH", $month_url);
                    $wtpl->setVariable("MONTH_COUNT", count($postings));
                }
                $wtpl->parseCurrentBlock();
            }

            if (!$a_link_template) {
                $this->ctrl->setParameterByClass(self::class, "bmn", null);
                $url = $this->ctrl->getLinkTargetByClass(self::class, $a_list_cmd);
            } else {
                $url = "index.html";
            }
            $wtpl->setVariable(
                "STARTING_PAGE",
                $this->ui->renderer()->render(
                    $this->ui->factory()->link()->standard(
                        $this->lng->txt("blog_starting_page"),
                        $url
                    )
                )
            );
        }
        // single month
        else {
            $wtpl = new ilTemplate("tpl.blog_list_navigation_month.html", true, true, "Modules/Blog");

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

            $month_options = array();
            foreach ($a_items as $month => $postings) {
                $month_name = ilCalendarUtil::_numericMonthToString((int) substr($month, 5)) .
                    " " . substr($month, 0, 4);

                $month_options[$month] = $month_name;

                if ($month == $this->month) {
                    if (!$a_link_template) {
                        $ilCtrl->setParameter($this, "bmn", $month);
                        $month_url = $ilCtrl->getLinkTarget($this, $a_list_cmd);
                    } else {
                        $month_url = $this->buildExportLink($a_link_template, "list", $month);
                    }

                    foreach ($postings as $id => $posting) {
                        $caption = /* ilDatePresentation::formatDate($posting["created"], IL_CAL_DATETIME).
                            ", ".*/ $posting["title"];

                        if (!$a_link_template) {
                            $ilCtrl->setParameterByClass("ilblogpostinggui", "bmn", $month);
                            $ilCtrl->setParameterByClass("ilblogpostinggui", "blpg", $id);
                            $url = $ilCtrl->getLinkTargetByClass("ilblogpostinggui", $a_posting_cmd);
                        } else {
                            $url = $this->buildExportLink($a_link_template, "posting", $id);
                        }

                        if (!$posting["active"]) {
                            $wtpl->setVariable("NAV_ITEM_DRAFT", $this->lng->txt("blog_draft"));
                        } elseif ($this->object->hasApproval() && !$posting["approved"]) {
                            $wtpl->setVariable("NAV_ITEM_APPROVAL", $this->lng->txt("blog_needs_approval"));
                        }

                        $wtpl->setCurrentBlock("navigation_item");
                        $wtpl->setVariable("NAV_ITEM_URL", $url);
                        $wtpl->setVariable("NAV_ITEM_CAPTION", $caption);
                        $wtpl->parseCurrentBlock();
                    }

                    $wtpl->setCurrentBlock("navigation_month_details");
                    if ($blpg > 0) {
                        $wtpl->setVariable("NAV_MONTH", $month_name);
                        $wtpl->setVariable("URL_MONTH", $month_url);
                    }
                    $wtpl->parseCurrentBlock();
                }
            }

            if ($blpg === 0) {
                $wtpl->setCurrentBlock("option_bl");
                foreach ($month_options as $value => $caption) {
                    $wtpl->setVariable("OPTION_VALUE", $value);
                    $wtpl->setVariable("OPTION_CAPTION", $caption);
                    if ($value == $this->month) {
                        $wtpl->setVariable("OPTION_SEL", ' selected="selected"');
                    }
                    $wtpl->parseCurrentBlock();
                }

                $wtpl->setVariable("FORM_ACTION", $ilCtrl->getFormAction($this, $a_list_cmd));
            }
        }
        $ilCtrl->setParameter($this, "bmn", $this->month);
        $ilCtrl->setParameterByClass("ilblogpostinggui", "bmn", "");
        return $wtpl->get();
    }

    protected function renderNavigationByKeywords(
        string $a_list_cmd = "render",
        bool $a_show_inactive = false,
        string $a_link_template = "",
        int $a_blpg = 0
    ): string {
        $ilCtrl = $this->ctrl;

        $blpg = ($a_blpg > 0)
            ? $a_blpg
            : $this->blpg;

        $keywords = $this->getKeywords($a_show_inactive, $blpg);
        if ($keywords) {
            $wtpl = new ilTemplate("tpl.blog_list_navigation_keywords.html", true, true, "Modules/Blog");

            $max = max($keywords);

            $wtpl->setCurrentBlock("keyword");
            foreach ($keywords as $keyword => $counter) {
                if (!$a_link_template) {
                    $ilCtrl->setParameter($this, "kwd", urlencode((string) $keyword)); // #15885
                    $url = $ilCtrl->getLinkTarget($this, $a_list_cmd);
                    $ilCtrl->setParameter($this, "kwd", "");
                } else {
                    $url = $this->buildExportLink($a_link_template, "keyword", $keyword);
                }

                $wtpl->setVariable("TXT_KEYWORD", $keyword);
                $wtpl->setVariable("CLASS_KEYWORD", ilTagging::getRelevanceClass($counter, $max));
                $wtpl->setVariable("URL_KEYWORD", $url);
                $wtpl->parseCurrentBlock();
            }

            return $wtpl->get();
        }
        return "";
    }

    protected function renderNavigationByAuthors(
        array $a_items,
        string $a_list_cmd = "render",
        bool $a_show_inactive = false
    ): string {
        $ilCtrl = $this->ctrl;

        $authors = array();
        foreach ($a_items as $month => $items) {
            foreach ($items as $item) {
                if (($a_show_inactive || ilBlogPosting::_lookupActive($item["id"], "blp"))) {
                    if ($item["author"]) {
                        $authors[] = $item["author"];
                    }

                    if (isset($item["editors"])) {
                        foreach ($item["editors"] as $editor_id) {
                            if ($editor_id != $item["author"]) {
                                $authors[] = $editor_id;
                            }
                        }
                    }
                }
            }
        }

        $authors = array_unique($authors);

        // filter out deleted users
        $authors = array_filter($authors, function ($id) {
            return ilObject::_lookupType($id) == "usr";
        });

        if (count($authors) > 1) {
            $list = array();
            foreach ($authors as $user_id) {
                if ($user_id) {
                    $ilCtrl->setParameter($this, "ath", $user_id);
                    $url = $ilCtrl->getLinkTarget($this, $a_list_cmd);
                    $ilCtrl->setParameter($this, "ath", "");

                    $base_name = ilUserUtil::getNamePresentation($user_id);
                    if (substr($base_name, 0, 1) == "[") {
                        $name = ilUserUtil::getNamePresentation($user_id, true);
                        $sort = $name;
                    } else {
                        $name = ilUserUtil::getNamePresentation(
                            $user_id,
                            true,
                            false,
                            "",
                            false,
                            true,
                            false
                        );
                        $name_arr = ilObjUser::_lookupName($user_id);
                        $sort = $name_arr["lastname"] . " " . $name_arr["firstname"];
                    }

                    $idx = trim(strip_tags($sort)) . "///" . $user_id;  // #10934
                    $list[$idx] = array($name, $url);
                }
            }
            ksort($list);

            $wtpl = new ilTemplate("tpl.blog_list_navigation_authors.html", true, true, "Modules/Blog");

            $wtpl->setCurrentBlock("author");
            foreach ($list as $author) {
                $wtpl->setVariable("TXT_AUTHOR", $author[0]);
                $wtpl->setVariable("URL_AUTHOR", $author[1]);
                $wtpl->parseCurrentBlock();
            }

            return $wtpl->get();
        }
        return "";
    }

    public function renderToolbarNavigation(
        array $a_items,
        bool $single_posting = false
    ): void {
        global $DIC;

        $toolbar = $DIC->toolbar();
        $lng = $DIC->language();
        $ctrl = $DIC->ctrl();

        $f = $DIC->ui()->factory();

        $cmd = ($this->prtf_embed)
            ? "previewEmbedded"
            : "previewFullscreen";

        if ($single_posting) {  // single posting view
            $latest_posting = $this->getLatestPosting($a_items);
            if ($latest_posting > 0 && $this->blpg !== $latest_posting) {
                $ctrl->setParameterByClass("ilblogpostinggui", "blpg", $latest_posting);
                $mb = $f->button()->standard(
                    $lng->txt("blog_latest_posting"),
                    $ctrl->getLinkTargetByClass("ilblogpostinggui", $cmd)
                );
            } else {
                $mb = $f->button()->standard($lng->txt("blog_latest_posting"), "#")->withUnavailableAction();
            }

            $prev_posting = $this->getPreviousPosting($a_items);
            if ($prev_posting > 0) {
                $ctrl->setParameterByClass("ilblogpostinggui", "blpg", $prev_posting);
                $pb = $f->button()->standard(
                    $lng->txt("previous"),
                    $ctrl->getLinkTargetByClass("ilblogpostinggui", $cmd)
                );
            } else {
                $pb = $f->button()->standard($lng->txt("previous"), "#")->withUnavailableAction();
            }

            $next_posting = $this->getNextPosting($a_items);
            if ($next_posting > 0) {
                $ctrl->setParameterByClass("ilblogpostinggui", "blpg", $next_posting);
                $nb = $f->button()->standard(
                    $lng->txt("next"),
                    $ctrl->getLinkTargetByClass("ilblogpostinggui", $cmd)
                );
            } else {
                $nb = $f->button()->standard($lng->txt("next"), "#")->withUnavailableAction();
            }
            $ctrl->setParameter($this, "blpg", $this->blpg);
            $vc = $f->viewControl()->section($pb, $mb, $nb);
            $toolbar->addComponent($vc);
            if ($this->mayContribute() && $this->mayEditPosting($this->blpg)) {
                $ctrl->setParameter($this, "prvm", "");


                $ctrl->setParameter($this, "bmn", "");
                $ctrl->setParameter($this, "blpg", "");
                $link = $ctrl->getLinkTarget($this, "");
                $ctrl->setParameter($this, "blpg", $this->blpg);
                $ctrl->setParameter($this, "bmn", $this->month);
                $toolbar->addSeparator();
                $toolbar->addComponent($f->button()->standard($lng->txt("blog_edit"), $link));


                $ctrl->setParameterByClass("ilblogpostinggui", "blpg", $this->blpg);
                /*if ($this->prtf_embed) {
                    $this->ctrl->setParameterByClass("ilobjportfoliogui", "ppage", $this->user_page);
                }*/
                $link = $ctrl->getLinkTargetByClass("ilblogpostinggui", "edit");
                $toolbar->addComponent($f->button()->standard($lng->txt("blog_edit_posting"), $link));
            }
        } else {                // month view
            $latest_month = $this->getLatestMonth($a_items);
            if ($latest_month !== "" && $this->month !== $latest_month) {
                $ctrl->setParameter($this, "bmn", $latest_month);
                $mb = $f->button()->standard(
                    $lng->txt("blog_latest_posting"),
                    $ctrl->getLinkTarget($this, "preview")
                );
            } else {
                $mb = $f->button()->standard($lng->txt("blog_latest_posting"), "#")->withUnavailableAction();
            }

            $prev_month = $this->getPreviousMonth($a_items);
            if ($prev_month !== "") {
                $ctrl->setParameter($this, "bmn", $prev_month);
                $pb = $f->button()->standard($lng->txt("previous"), $ctrl->getLinkTarget($this, "preview"));
            } else {
                $pb = $f->button()->standard($lng->txt("previous"), "#")->withUnavailableAction();
            }

            $next_month = $this->getNextMonth($a_items);
            if ($next_month !== "") {
                $ctrl->setParameter($this, "bmn", $next_month);
                $nb = $f->button()->standard($lng->txt("next"), $ctrl->getLinkTarget($this, "preview"));
            } else {
                $nb = $f->button()->standard($lng->txt("next"), "#")->withUnavailableAction();
            }
            $ctrl->setParameter($this, "bmn", $this->month);
            $vc = $f->viewControl()->section($pb, $mb, $nb);
            $toolbar->addComponent($vc);

            if ($this->mayContribute()) {
                $ctrl->setParameter($this, "prvm", "");

                $ctrl->setParameter($this, "bmn", "");
                $ctrl->setParameter($this, "blpg", "");
                $link = $ctrl->getLinkTarget($this, "");
                $ctrl->setParameter($this, "blpg", $this->blpg);
                $ctrl->setParameter($this, "bmn", $this->month);
                $toolbar->addSeparator();
                $toolbar->addComponent($f->button()->standard($lng->txt("blog_edit"), $link));
            }
        }
    }

    public function getNextMonth(
        array $a_items
    ): string {
        reset($a_items);
        $found = "";
        foreach ($a_items as $month => $items) {
            if ($month > $this->month) {
                $found = $month;
            }
        }
        return $found;
    }

    public function getPreviousMonth(
        array $a_items
    ): string {
        reset($a_items);
        $found = "";
        foreach ($a_items as $month => $items) {
            if ($month < $this->month && $found === "") {
                $found = $month;
            }
        }
        return $found;
    }

    public function getLatestMonth(
        array $a_items
    ): string {
        reset($a_items);
        return key($a_items);
    }

    public function getNextPosting(
        array $a_items
    ): int {
        reset($a_items);
        $found = "";
        $next_blpg = 0;
        foreach ($a_items as $month => $items) {
            foreach ($items as $item) {
                if ($item["id"] == $this->blpg) {
                    $found = true;
                }
                if (!$found) {
                    $next_blpg = (int) $item["id"];
                }
            }
        }
        return $next_blpg;
    }

    public function getPreviousPosting(
        array $a_items
    ): int {
        reset($a_items);
        $found = "";
        $prev_blpg = 0;
        foreach ($a_items as $month => $items) {
            foreach ($items as $item) {
                if ($found && $prev_blpg === 0) {
                    $prev_blpg = (int) $item["id"];
                }
                if ((int) $item["id"] === $this->blpg) {
                    $found = true;
                }
            }
        }
        return $prev_blpg;
    }

    public function getLatestPosting(
        array $a_items
    ): int {
        reset($a_items);
        $month = current($a_items);
        if (is_array($month)) {
            return (int) current($month)["id"];
        }
        return 0;
    }

    public function renderNavigation(
        string $a_list_cmd = "render",
        string $a_posting_cmd = "preview",
        string $a_link_template = null,
        bool $a_show_inactive = false,
        int $a_blpg = 0
    ): string {
        $ilSetting = $this->settings;
        $a_items = $this->items;

        $blpg = ($a_blpg > 0)
            ? $a_blpg
            : $this->blpg;

        if ($this->object->getOrder()) {
            $order = array_flip($this->object->getOrder());
        } else {
            $order = array(
                "navigation" => 0
                ,"keywords" => 2
                ,"authors" => 1
            );
        }

        $wtpl = new ilTemplate("tpl.blog_list_navigation.html", true, true, "Modules/Blog");

        $blocks = array();

        // by date
        if (count($a_items)) {
            $blocks[$order["navigation"]] = array(
                $this->lng->txt("blog_navigation"),
                $this->renderNavigationByDate($a_items, $a_list_cmd, $a_posting_cmd, $a_link_template, $a_show_inactive, $a_blpg)
            );
        }

        if ($this->object->hasKeywords()) {
            // keywords
            $may_edit_keywords = ($blpg > 0 &&
                $this->mayEditPosting($blpg) &&
                $a_list_cmd !== "preview" &&
                $a_list_cmd !== "gethtml" &&
                !$a_link_template);
            $keywords = $this->renderNavigationByKeywords($a_list_cmd, $a_show_inactive, (bool) $a_link_template, $a_blpg);
            if ($keywords || $may_edit_keywords) {
                if (!$keywords) {
                    $keywords = $this->lng->txt("blog_no_keywords");
                }
                $cmd = null;
                $blocks[$order["keywords"]] = array(
                    $this->lng->txt("blog_keywords"),
                    $keywords,
                    $cmd
                        ? array($cmd, $this->lng->txt("blog_edit_keywords"))
                        : null
                );
            }
        }

        // is not part of (html) export
        if (!$a_link_template) {
            // authors
            if ($this->id_type === self::REPOSITORY_NODE_ID &&
                $this->object->hasAuthors()) {
                $authors = $this->renderNavigationByAuthors($a_items, $a_list_cmd, $a_show_inactive);
                if ($authors) {
                    $blocks[$order["authors"]] = array($this->lng->txt("blog_authors"), $authors);
                }
            }

            // rss
            if ($this->object->hasRSS() &&
                $ilSetting->get('enable_global_profiles') &&
                $a_list_cmd === "preview") {
                // #10827
                $blog_id = $this->node_id;
                if ($this->id_type !== self::WORKSPACE_NODE_ID) {
                    $blog_id .= "_cll";
                }
                $url = ILIAS_HTTP_PATH . "/feed.php?blog_id=" . $blog_id .
                    "&client_id=" . rawurlencode(CLIENT_ID);

                $wtpl->setVariable("RSS_BUTTON", ilRSSButtonGUI::get(ilRSSButtonGUI::ICON_RSS, $url));
            }
        }

        if (count($blocks)) {
            global $DIC;

            $ui_factory = $DIC->ui()->factory();
            $ui_renderer = $DIC->ui()->renderer();

            ksort($blocks);
            foreach ($blocks as $block) {
                $title = $block[0];

                $content = $block[1];

                $secondary_panel = $ui_factory->panel()->secondary()->legacy($title, $ui_factory->legacy($content));

                if (isset($block[2]) && is_array($block[2])) {
                    $link = $ui_factory->button()->shy($block[2][1], $block[2][0]);
                    $secondary_panel = $secondary_panel->withFooter($link);
                }

                $wtpl->setCurrentBlock("block_bl");
                $wtpl->setVariable("BLOCK", $ui_renderer->render($secondary_panel));
                $wtpl->parseCurrentBlock();
            }
        }

        return $wtpl->get();
    }

    public function getKeywords(
        bool $a_show_inactive,
        ?int $a_posting_id = null
    ): array {
        $keywords = array();
        if ($a_posting_id) {
            foreach (ilBlogPosting::getKeywords($this->obj_id, $a_posting_id) as $keyword) {
                if (isset($keywords[$keyword])) {
                    $keywords[$keyword]++;
                } else {
                    $keywords[$keyword] = 1;
                }
            }
        } else {
            foreach ($this->items as $month => $items) {
                foreach ($items as $item) {
                    if ($a_show_inactive || ilBlogPosting::_lookupActive($item["id"], "blp")) {
                        foreach (ilBlogPosting::getKeywords($this->obj_id, $item["id"]) as $keyword) {
                            if (isset($keywords[$keyword])) {
                                $keywords[$keyword]++;
                            } else {
                                $keywords[$keyword] = 1;
                            }
                        }
                    }
                }
            }
        }

        // #15881
        $tmp = array();
        foreach ($keywords as $keyword => $counter) {
            $tmp[] = array("keyword" => $keyword, "counter" => $counter);
        }
        $tmp = ilArrayUtil::sortArray($tmp, "keyword", "ASC");

        $keywords = array();
        foreach ($tmp as $item) {
            $keywords[(string) $item["keyword"]] = $item["counter"];
        }
        return $keywords;
    }

    public function buildExportFile(
        bool $a_include_comments = false,
        bool $print_version = false
    ): string {
        $type = "html";
        $format = explode("_", $this->blog_request->getFormat());
        if (($format[1] ?? "") === "comments" || $a_include_comments) {
            $a_include_comments = true;
            $type = "html_comments";
        }

        // create export file
        ilExport::_createExportDirectory($this->object->getId(), $type, "blog");
        $exp_dir = ilExport::_getExportDirectory($this->object->getId(), $type, "blog");

        $subdir = $this->object->getType() . "_" . $this->object->getId();
        if ($print_version) {
            $subdir .= "print";
        }

        $blog_export = new \ILIAS\Blog\Export\BlogHtmlExport($this, $exp_dir, $subdir);
        $blog_export->setPrintVersion($print_version);
        $blog_export->includeComments($a_include_comments);
        return $blog_export->exportHTML();
    }

    public function getNotesSubId(): int
    {
        return $this->blpg;
    }

    public function disableNotes(bool $a_value = false): void
    {
        $this->disable_notes = $a_value;
    }

    protected function addHeaderActionForCommand(
        string $a_cmd
    ): void {
        $ilUser = $this->user;
        $ilCtrl = $this->ctrl;
        // preview?
        if ($a_cmd === "preview" || $a_cmd === "previewEmbedded" || $a_cmd === "previewFullscreen" || $this->prvm) {
            // notification
            if ($ilUser->getId() !== ANONYMOUS_USER_ID) {
                if (!$this->prvm) {
                    $ilCtrl->setParameter($this, "prvm", "fsc");
                }
                $this->insertHeaderAction($this->initHeaderAction(null, null, true));
                if (!$this->prvm) {
                    $ilCtrl->setParameter($this, "prvm", "");
                }
            }
        } else {
            $this->addHeaderAction();
        }
    }

    protected function initHeaderAction(
        ?string $sub_type = null,
        ?int $sub_id = null,
        bool $is_preview = false
    ): ?ilObjectListGUI {
        $ilUser = $this->user;
        $ilCtrl = $this->ctrl;
        if (!$this->obj_id) {
            return null;
        }
        $sub_type = $sub_id = null;
        if ($this->blpg > 0) {
            $sub_type = "blp";
            $sub_id = $this->blpg;
        }

        $lg = parent::initHeaderAction($sub_type, $sub_id);
        if (!$lg) {
            return null;
        }
        $lg->enableComments(false);
        $lg->enableNotes(false);

        if ($is_preview) {
            if ($this->blpg > 0) {
                if (($this->object->getNotesStatus() && !$this->disable_notes)) {
                    $lg->enableComments(true);
                }
                $lg->enableNotes(true);
            }
            $lg->enableTags(false);

            if (!$this->prtf_embed) {
                if (ilNotification::hasNotification(ilNotification::TYPE_BLOG, $ilUser->getId(), $this->obj_id)) {
                    $ilCtrl->setParameter($this, "ntf", 1);
                    $link = $ilCtrl->getLinkTarget($this, "setNotification");
                    $ilCtrl->setParameter($this, "ntf", "");
                    if (ilNotification::hasOptOut($this->obj_id)) {
                        $lg->addCustomCommand($link, "blog_notification_toggle_off");
                    }

                    $lg->addHeaderIcon(
                        "not_icon",
                        ilUtil::getImagePath("notification_on.svg"),
                        $this->lng->txt("blog_notification_activated")
                    );
                } else {
                    $ilCtrl->setParameter($this, "ntf", 2);
                    $link = $ilCtrl->getLinkTarget($this, "setNotification");
                    $ilCtrl->setParameter($this, "ntf", "");
                    $lg->addCustomCommand($link, "blog_notification_toggle_on");

                    $lg->addHeaderIcon(
                        "not_icon",
                        ilUtil::getImagePath("notification_off.svg"),
                        $this->lng->txt("blog_notification_deactivated")
                    );
                }
            }

            // #11758
            if ($this->mayContribute()) {
                $ilCtrl->setParameter($this, "prvm", "");

                $ilCtrl->setParameter($this, "bmn", "");
                $ilCtrl->setParameter($this, "blpg", "");
                $link = $ilCtrl->getLinkTarget($this, "");
                $ilCtrl->setParameter($this, "blpg", $sub_id);
                $ilCtrl->setParameter($this, "bmn", $this->month);
                $lg->addCustomCommand($link, "blog_edit"); // #11868

                if ($sub_id && $this->mayEditPosting($sub_id)) {
                    $link = $ilCtrl->getLinkTargetByClass("ilblogpostinggui", "edit");
                    $lg->addCustomCommand($link, "blog_edit_posting");
                }

                $ilCtrl->setParameter($this, "prvm", "fsc");
            }

            $ilCtrl->setParameter($this, "ntf", "");
        }

        return $lg;
    }

    protected function setNotification(): void
    {
        $ilUser = $this->user;
        $ilCtrl = $this->ctrl;

        switch ($this->ntf) {
            case 1:
                ilNotification::setNotification(ilNotification::TYPE_BLOG, $ilUser->getId(), $this->obj_id, false);
                break;

            case 2:
                ilNotification::setNotification(ilNotification::TYPE_BLOG, $ilUser->getId(), $this->obj_id, true);
                break;
        }

        $ilCtrl->redirect($this, "preview");
    }

    public static function lookupSubObjectTitle(
        int $a_blog_id,
        int $a_posting_id
    ): string {
        // page might be deleted, so setting halt on errors to false
        $post = new ilBlogPosting($a_posting_id);
        if ($post->getBlogId() === $a_blog_id) {
            return $post->getTitle();
        }
        return "";
    }

    protected function filterInactivePostings(): void
    {
        foreach ($this->items as $month => $postings) {
            foreach ($postings as $id => $item) {
                if (!ilBlogPosting::_lookupActive($id, "blp")) {
                    unset($this->items[$month][$id]);
                } elseif ($this->object->hasApproval() && !$item["approved"]) {
                    unset($this->items[$month][$id]);
                }
            }
            if (!count($this->items[$month])) {
                unset($this->items[$month]);
            }
        }

        if ($this->items && !isset($this->items[$this->month])) {
            $keys = array_keys($this->items);
            $this->month = array_shift($keys);
        }
    }

    public function filterItemsByKeyword(
        array $a_items,
        string $a_keyword
    ): array {
        $res = [];
        foreach ($a_items as $month => $items) {
            foreach ($items as $item) {
                if (in_array(
                    $a_keyword,
                    ilBlogPosting::getKeywords($this->obj_id, $item["id"])
                )) {
                    $res[] = $item;
                }
            }
        }
        return $res;
    }

    protected function isAdmin(): bool
    {
        return ($this->checkPermissionBool("redact") ||
                $this->checkPermissionBool("write"));
    }

    protected function mayEditPosting(
        int $a_posting_id,
        int $a_author_id = null
    ): bool {
        $ilUser = $this->user;

        // single author blog (owner) in personal workspace
        if ($this->id_type === self::WORKSPACE_NODE_ID) {
            return $this->checkPermissionBool("write");
        }

        // repository blogs

        // redact allows to edit all postings
        if ($this->checkPermissionBool("redact")) {
            return true;
        }

        // contribute gives access to own postings
        if ($this->checkPermissionBool("contribute")) {
            // check owner of posting
            if (!$a_author_id) {
                $post = new ilBlogPosting($a_posting_id);
                $a_author_id = $post->getAuthor();
            }
            return $ilUser->getId() === $a_author_id;
        }
        return false;
    }

    protected function mayContribute(): bool
    {
        // single author blog (owner) in personal workspace
        if ($this->id_type == self::WORKSPACE_NODE_ID) {
            return $this->checkPermissionBool("write");
        }

        return ($this->checkPermissionBool("redact") ||
            $this->checkPermissionBool("contribute"));
    }

    protected function addLocatorItems(): void
    {
        $ilLocator = $this->locator;

        if (is_object($this->object)) {
            $ilLocator->addItem($this->object->getTitle(), $this->ctrl->getLinkTarget($this, "preview"), "", $this->node_id);
        }
    }

    public function approve(): void
    {
        if ($this->isAdmin() && $this->apid > 0) {
            $post = new ilBlogPosting($this->apid);
            $post->setApproved(true);
            $post->setBlogNodeId($this->node_id, ($this->id_type == self::WORKSPACE_NODE_ID));
            $post->update(true, false, true, "new"); // #13434

            $this->tpl->setOnScreenMessage('success', $this->lng->txt("settings_saved"), true);
        }

        $this->ctrl->redirect($this, "render");
    }


    //
    // contributors
    //

    public function contributors(): void
    {
        $ilTabs = $this->tabs;
        $ilToolbar = $this->toolbar;
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        $tpl = $this->tpl;

        if (!$this->checkPermissionBool("write")) {
            return;
        }

        $ilTabs->activateTab("contributors");

        $local_roles = $this->object->getAllLocalRoles($this->node_id);

        // add member
        ilRepositorySearchGUI::fillAutoCompleteToolbar(
            $this,
            $ilToolbar,
            array(
                'auto_complete_name' => $lng->txt('user'),
                'submit_name' => $lng->txt('add'),
                'add_search' => true,
                'add_from_container' => $this->node_id,
                'user_type' => $local_roles
            ),
            true
        );

        $other_roles = $this->object->getRolesWithContributeOrRedact($this->node_id);
        if ($other_roles) {
            $this->tpl->setOnScreenMessage('info', sprintf($lng->txt("blog_contribute_other_roles"), implode(", ", $other_roles)));
        }

        $tbl = new ilContributorTableGUI($this, "contributors", $this->object->getAllLocalRoles($this->node_id));

        $tpl->setContent($tbl->getHTML());
    }

    public function addUserFromAutoComplete(): void
    {
        $lng = $this->lng;

        $user_login = $this->blog_request->getUserLogin();
        $user_type = $this->blog_request->getUserType();

        if (trim($user_login) === '') {
            $this->tpl->setOnScreenMessage('failure', $lng->txt('msg_no_search_string'));
            $this->contributors();
            return;
        }
        $users = explode(',', $user_login);

        $user_ids = array();
        foreach ($users as $user) {
            $user_id = ilObjUser::_lookupId($user);

            if (!$user_id) {
                $this->tpl->setOnScreenMessage('failure', $lng->txt('user_not_known'));
                $this->contributors();
                return;
            }

            $user_ids[] = (int) $user_id;
        }

        $this->addContributor($user_ids, $user_type);
    }

    public function addContributor(
        array $a_user_ids = array(),
        ?string $a_user_type = null
    ): void {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        $rbacreview = $this->rbac_review;
        $rbacadmin = $this->rbacadmin;
        $a_user_type = (int) $a_user_type;

        if (!$this->checkPermissionBool("write")) {
            return;
        }

        if (!count($a_user_ids) || !$a_user_type) {
            $this->tpl->setOnScreenMessage('failure', $lng->txt("no_checkbox"));
            $this->contributors();
            return;
        }

        // get contributor role
        $local_roles = array_keys($this->object->getAllLocalRoles($this->node_id));
        if (!in_array($a_user_type, $local_roles)) {
            $this->tpl->setOnScreenMessage('failure', $lng->txt("missing_perm"));
            $this->contributors();
            return;
        }

        foreach ($a_user_ids as $user_id) {
            if (!$rbacreview->isAssigned($user_id, $a_user_type)) {
                $rbacadmin->assignUser($a_user_type, $user_id);
            }
        }

        $this->tpl->setOnScreenMessage('success', $lng->txt("settings_saved"), true);
        $ilCtrl->redirect($this, "contributors");
    }

    public function confirmRemoveContributor(): void
    {
        $ids = $this->blog_request->getIds();

        if (count($ids) === 0) {
            $this->tpl->setOnScreenMessage('failure', $this->lng->txt("select_one"), true);
            $this->ctrl->redirect($this, "contributors");
        }

        $confirm = new ilConfirmationGUI();
        $confirm->setHeaderText($this->lng->txt('blog_confirm_delete_contributors'));
        $confirm->setFormAction($this->ctrl->getFormAction($this, 'removeContributor'));
        $confirm->setConfirm($this->lng->txt('delete'), 'removeContributor');
        $confirm->setCancel($this->lng->txt('cancel'), 'contributors');

        foreach ($ids as $user_id) {
            $confirm->addItem(
                'id[]',
                $user_id,
                ilUserUtil::getNamePresentation($user_id, false, false, "", true)
            );
        }

        $this->tpl->setContent($confirm->getHTML());
    }

    public function removeContributor(): void
    {
        $ilCtrl = $this->ctrl;
        $lng = $this->lng;
        $rbacadmin = $this->rbacadmin;

        $ids = $this->blog_request->getIds();

        if (count($ids) === 0) {
            $this->tpl->setOnScreenMessage('failure', $lng->txt("select_one"), true);
            $ilCtrl->redirect($this, "contributors");
        }

        // get contributor role
        $local_roles = array_keys($this->object->getAllLocalRoles($this->node_id));
        if (!$local_roles) {
            $this->tpl->setOnScreenMessage('failure', $lng->txt("missing_perm"));
            $this->contributors();
            return;
        }

        foreach ($ids as $user_id) {
            foreach ($local_roles as $role_id) {
                $rbacadmin->deassignUser($role_id, $user_id);
            }
        }

        $this->tpl->setOnScreenMessage('success', $lng->txt("settings_saved"), true);
        $this->ctrl->redirect($this, "contributors");
    }

    public function deactivateAdmin(): void
    {
        if ($this->checkPermissionBool("write") && $this->apid > 0) {
            // ilBlogPostingGUI::deactivatePage()
            $post = new ilBlogPosting($this->apid);
            $post->setApproved(false);
            $post->setActive(false);
            $post->update(true, false, false);

            $this->tpl->setOnScreenMessage('success', $this->lng->txt("settings_saved"), true);
        }

        $this->ctrl->redirect($this, "render");
    }



    public function setContentStyleSheet(
        ilGlobalTemplateInterface $a_tpl = null
    ): void {
        $tpl = $this->tpl;

        if ($a_tpl) {
            $ctpl = $a_tpl;
        } else {
            $ctpl = $tpl;
        }

        $this->content_style_gui->addCss(
            $ctpl,
            $this->object->getRefId(),
            $this->object->getId()
        );
    }

    public static function _goto(string $a_target): void
    {
        global $DIC;

        $ilCtrl = $DIC->ctrl();
        $access = $DIC->access();

        $id = explode("_", $a_target);
        if (substr($a_target, -3) === "wsp") {
            $ilCtrl->setParameterByClass("ilSharedResourceGUI", "wsp_id", $id[0]);

            if (count($id) >= 2) {
                if (is_numeric($id[1])) {
                    $ilCtrl->setParameterByClass("ilSharedResourceGUI", "gtp", $id[1]);
                } else {
                    $ilCtrl->setParameterByClass("ilSharedResourceGUI", "kwd", $id[1]);
                }
                if (($id[2] ?? "") === "edit") {
                    $ilCtrl->setParameterByClass("ilSharedResourceGUI", "edt", $id[2]);
                }
            }
            $ilCtrl->redirectByClass("ilSharedResourceGUI", "");
        } else {
            $ilCtrl->setParameterByClass("ilRepositoryGUI", "ref_id", $id[0]);

            if (count($id) >= 2) {
                if (is_numeric($id[1])) {
                    $ilCtrl->setParameterByClass("ilRepositoryGUI", "gtp", $id[1]);
                } else {
                    $ilCtrl->setParameterByClass("ilRepositoryGUI", "kwd", $id[1]);
                }

                if (($id[2] ?? "") === "edit") {
                    $ilCtrl->setParameterByClass("ilRepositoryGUI", "edt", $id[2]);
                }
            }
            if ($access->checkAccess("read", "", $id[0])) {
                $ilCtrl->redirectByClass("ilRepositoryGUI", "preview");
            }
            if ($access->checkAccess("visible", "", $id[0])) {
                $ilCtrl->redirectByClass("ilRepositoryGUI", "infoScreen");
            }
        }
    }

    protected function exportWithComments(): void
    {
        $this->export(true);
    }


    public function getPrintView(): \ILIAS\Export\PrintProcessGUI
    {
        $style_sheet_id = $this->content_style_domain->getEffectiveStyleId();

        $blog = $this->object;
        $provider = new \ILIAS\Blog\BlogPrintViewProviderGUI(
            $this->lng,
            $this->ctrl,
            $blog,
            $this->node_id,
            $this->access_handler,
            $style_sheet_id,
            $this->blog_request->getObjIds()
        );

        return new \ILIAS\Export\PrintProcessGUI(
            $provider,
            $this->http,
            $this->ui,
            $this->lng
        );
    }

    public function printViewSelection(): void
    {
        $view = $this->getPrintView();
        $view->sendForm();
    }

    public function printPostings(): void
    {
        $print_view = $this->getPrintView();
        $print_view->sendPrintView();
    }

    protected function forwardExport(): void
    {
        $this->ctrl->redirectByClass(ilExportGUI::class);
    }
}