image->id)); $next_url = make_http(make_link("post/next/".$event->image->id)); $this->add_arrowkeys_code($prev_url, $next_url); } /** * Adds functionality for post/list. */ public function onPageRequest(PageRequestEvent $event) { if ($event->page_matches("post/list")) { $pageinfo = $this->get_list_pageinfo($event); $prev_url = make_http(make_link("post/list/".$pageinfo["prev"])); $next_url = make_http(make_link("post/list/".$pageinfo["next"])); $this->add_arrowkeys_code($prev_url, $next_url); } } /** * Adds the javascript to the page with the given urls. */ private function add_arrowkeys_code(string $prev_url, string $next_url) { global $page; $page->add_html_header("", 60); } /** * Returns info about the current page number. */ private function get_list_pageinfo(PageRequestEvent $event): array { global $config, $database; // get the amount of images per page $images_per_page = $config->get_int(IndexConfig::IMAGES); if ($event->count_args() > 1) { // if there are tags, use pages with tags $prefix = url_escape($event->get_arg(0)) . "/"; $page_number = $event->try_page_num(1); $total_pages = ceil($database->get_one( "SELECT count FROM tags WHERE tag=:tag", ["tag"=>$event->get_arg(0)] ) / $images_per_page); } else { // if there are no tags, use default $prefix = ""; $page_number = $event->try_page_num(0); $total_pages = ceil($database->get_one( "SELECT COUNT(*) FROM images" ) / $images_per_page); } // creates previous & next values // When previous first page, go to last page if ($page_number <= 1) { $prev = $total_pages; } else { $prev = $page_number-1; } if ($page_number >= $total_pages) { $next = 1; } else { $next = $page_number+1; } // Create return array $pageinfo = [ "prev" => $prefix.$prev, "next" => $prefix.$next, ]; return $pageinfo; } }