there is an error
        add_action('admin_notices', function() {
            $message = get_option('_wpcc_site_notice');
            if($message) {
                echo Utils::view('partials/alert')->with([
                    'message'   =>  $message,
                    'type'      =>  'error'
                ])->render();

                update_option('_wpcc_site_notice', false);
            }
        });

    }

    /**
     * Get counts of URLs grouped by site ID and whether they are saved or not.
     *
     * @return array An array with keys being site IDs and values being an array containing post counts. Each value
     * array has <b>count_saved</b>, <b>count_updated</b>, <b>count_queue</b>, <b>count_deleted</b>, <b>count_other</b>, <b>count_total</b>.
     * These values are either <b>integer or null</b>.
     */
    public function getUrlTableCounts() {
        // If it is already found before, return it.
        if(static::$urlCounts) return static::$urlCounts;

        // Find URL counts
        global $wpdb;
        $tableUrls = Factory::databaseService()->getDbTableUrlsName();

        $query = "SELECT t_total.post_id, count_saved, count_updated, count_queue, count_deleted,
                (IFNULL(count_total, 0) - IFNULL(count_saved, 0) - IFNULL(count_queue, 0) - IFNULL(count_deleted, 0)) as count_other, count_total
            FROM
                (SELECT post_id, count(*) as count_total FROM {$tableUrls} GROUP BY post_id) t_total
            
            LEFT JOIN (
                SELECT post_id, count(*) as count_queue 
                FROM {$tableUrls} 
                WHERE saved_post_id IS NULL 
                    AND is_saved = FALSE 
                GROUP BY post_id) t_queue ON t_total.post_id = t_queue.post_id
            
            LEFT JOIN (
                SELECT post_id, count(*) as count_saved
                FROM {$tableUrls} 
                WHERE saved_post_id IS NOT NULL 
                    AND is_saved = TRUE
                GROUP BY post_id) t_saved ON t_total.post_id = t_saved.post_id
                
            LEFT JOIN (
                SELECT post_id, count(*) as count_updated
                FROM {$tableUrls} 
                WHERE saved_post_id IS NOT NULL 
                    AND is_saved = TRUE
                    AND update_count > 0
                GROUP BY post_id) t_updated ON t_total.post_id = t_updated.post_id
            
            LEFT JOIN (
                SELECT post_id, count(*) as count_deleted
                FROM {$tableUrls}
                WHERE saved_post_id IS NULL
                    AND deleted_at IS NOT NULL
                GROUP BY post_id) t_deleted ON t_total.post_id = t_deleted.post_id";

        $results = $wpdb->get_results($query, ARRAY_A);
        $data = [];

        foreach($results as $result) {
            // Get post id from current result
            $currentPostId = $result["post_id"];

            // Unset the post id
            unset($result["post_id"]);

            // Add the result to the data under post ID key.
            $data[$currentPostId] = $result;
        }

        static::$urlCounts = $data;

        return static::$urlCounts;
    }

    /*
     * EDITOR BUTTONS
     */

    private function getEditorButtonsMain() {
        if(!$this->editorButtonsMain) $this->editorButtonsMain = [
            $this->createButtonInfo(ShortCodeName::WCC_MAIN_TITLE,   _wpcc("Prepared post title"), true),
            $this->createButtonInfo(ShortCodeName::WCC_MAIN_EXCERPT, _wpcc("Prepared post excerpt"), true),
            $this->createButtonInfo(ShortCodeName::WCC_MAIN_CONTENT, _wpcc("Main post content")),
            $this->createButtonInfo(ShortCodeName::WCC_MAIN_LIST,    _wpcc("List items")),
            $this->createButtonInfo(ShortCodeName::WCC_MAIN_GALLERY, _wpcc("Gallery items")),
            $this->createButtonInfo(ShortCodeName::WCC_SOURCE_URL,   sprintf(_wpcc('Full URL of the target page. You can use this to reference the source page. E.g. <a href="%1$s">Source</a>'), '[' . ShortCodeName::WCC_SOURCE_URL .']')),
        ];

        return $this->editorButtonsMain;
    }

    private function getEditorButtonsTitle() {
        if(!$this->editorButtonsTitle) $this->editorButtonsTitle = [
            $this->createButtonInfo(ShortCodeName::WCC_MAIN_TITLE, _wpcc("Original post title"), true),
        ];

        return $this->editorButtonsTitle;
    }

    private function getEditorButtonsExcerpt() {
        if(!$this->editorButtonsExcerpt) $this->editorButtonsExcerpt = [
            $this->createButtonInfo(ShortCodeName::WCC_MAIN_TITLE,   _wpcc("Prepared post title"), true),
            $this->createButtonInfo(ShortCodeName::WCC_MAIN_EXCERPT, _wpcc("Original post excerpt"), true),
        ];

        return $this->editorButtonsExcerpt;
    }

    private function getEditorButtonsList() {
        if(!$this->editorButtonsList) $this->editorButtonsList = [
            $this->createButtonInfo(ShortCodeName::WCC_LIST_ITEM_TITLE, _wpcc("List item title")),
            $this->createButtonInfo(ShortCodeName::WCC_LIST_ITEM_CONTENT, _wpcc("List item content")),
            $this->createButtonInfo(ShortCodeName::WCC_LIST_ITEM_POSITION, _wpcc("The position of the item.")),
        ];

        return $this->editorButtonsList;
    }

    private function getEditorButtonsGallery() {
        if(!$this->editorButtonsGallery) $this->editorButtonsGallery = [
            $this->createButtonInfo(ShortCodeName::WCC_GALLERY_ITEM_URL, _wpcc("Gallery item URL"))
        ];

        return $this->editorButtonsGallery;
    }

    private function getEditorButtonsOptionsBoxTemplates() {
        if (!$this->editorButtonsOptionsBoxTemplates) {
            $this->editorButtonsOptionsBoxTemplates = array_merge([
                $this->createButtonInfo(ShortCodeName::WCC_ITEM, _wpcc("Found item"))
            ], $this->getEditorButtonsMain());
        }

        return $this->editorButtonsOptionsBoxTemplates;
    }

    /**
     * @param string $code        Short code without square brackets
     * @param string $description Description for what the short code does
     * @param bool   $fresh       True if a fresh instance should be returned. Otherwise, if the code created before,
     *                            the previously-created instance will be returned.
     * @return ShortCodeButton    Short code button
     */
    private function createButtonInfo($code, $description = '', $fresh = false) {
        return ShortCodeButton::getShortCodeButton($code, $description, $fresh);
    }

    /**
     * Get an array of all predefined short codes
     * @return array An array of short codes with square brackets
     */
    public function getPredefinedShortCodes() {
        if(!$this->allPredefinedShortCodes) {
            $combinedButtons = array_merge(
                $this->getEditorButtonsMain(),
                $this->getEditorButtonsTitle(),
                $this->getEditorButtonsExcerpt(),
                $this->getEditorButtonsList(),
                $this->getEditorButtonsGallery()
            );
            $result = [];
            foreach ($combinedButtons as $btn) {
                /** @var ShortCodeButton $btn */
                $result[] = $btn->getCodeWithBrackets();
            }

            $this->allPredefinedShortCodes = $result;
        }

        return $this->allPredefinedShortCodes;
    }

    /*
     *
     */

    /**
     * Get single meta keys
     *
     * @return array An array of keys
     */
    public function getSingleMetaKeys() {
        return $this->singleMetaKeys;
    }
}