feat: Improvements for Torrent Files List functionality (#1878)

* feat: Improvements for `Torrent Files List` functionality

* Updated

* Updated

* Update filelist.php

* Update filelist.php

* Update filelist.php

* Updated

* Update filelist.php

* Update filelist.php

* Update filelist.php

* Updated

* Update filelist.php

* Update filelist.php

filelist.php

@@ -34,6 +34,32 @@ if (!$row = DB()->fetch_row($sql)) {
     bb_die($lang['INVALID_TOPIC_ID_DB'], 404);
 }
 
+// Previous/next topic links
+$sql = '
+    (SELECT topic_id FROM ' . BB_BT_TORRENTS . ' WHERE topic_id < ' . $topic_id . ' ORDER BY topic_id DESC LIMIT 1)
+    UNION
+    (SELECT topic_id FROM ' . BB_BT_TORRENTS . ' WHERE topic_id >= ' . $topic_id . ' ORDER BY topic_id ASC LIMIT 2)
+    ORDER BY topic_id ASC';
+
+if (!$topics = DB()->fetch_rowset($sql)) {
+    bb_die($lang['INVALID_TOPIC_ID_DB'], 404);
+}
+$topic_ids = array_column($topics, 'topic_id');
+
+$current_index = array_search($topic_id, $topic_ids);
+if ($current_index === false) {
+    bb_die($lang['INVALID_TOPIC_ID_DB'], 404);
+}
+
+$prev_topic_id = $topic_ids[$current_index - 1] ?? $topic_id;
+$next_topic_id = $topic_ids[$current_index + 1] ?? $topic_id;
+
+$template->assign_vars([
+    'U_NEXT_TOPIC' => "filelist.php?t=$next_topic_id",
+    'U_PREV_TOPIC' => "filelist.php?t=$prev_topic_id",
+]);
+unset($prev_topic_id, $next_topic_id, $current_index, $topic_ids, $topics);
+
 // Protocol meta
 $meta_v1 = !empty($row['info_hash']);
 $meta_v2 = !empty($row['info_hash_v2']);

library/language/source/main.php

@@ -1733,6 +1733,8 @@ $lang['EMPTY_ATTACH_ID'] = 'Missing file identifier!';
 $lang['TOR_NOT_FOUND'] = 'File is missing on the server!';
 $lang['ERROR_BUILD'] = 'The content of this torrent file can not be viewed on the site (it was not possible to build a list of files)';
 $lang['TORFILE_INVALID'] = 'Torrent file is corrupt';
+$lang['PREV_RELEASE'] = 'Previous release';
+$lang['NEXT_RELEASE'] = 'Next release';
 
 // Profile
 $lang['WEBSITE_ERROR'] = 'The "site" may contain only http://sitename';

styles/templates/default/filelist.tpl

@@ -6,6 +6,11 @@
 </ul>
 <br/>
 
+<div class="nav">
+    <p class="floatR"><a href="{U_PREV_TOPIC}">← {L_PREV_RELEASE}</a>&nbsp;|&nbsp;<a href="{U_NEXT_TOPIC}">{L_NEXT_RELEASE} →</a></p>
+    <div class="clear"></div>
+</div>
+
 <h1 class="pagetitle">{L_BT_FLIST_ANNOUNCERS_LIST}</h1>
 <table class="forumline">
     <thead>

styles/templates/default/viewtopic_attach_guest.tpl

@@ -4,6 +4,7 @@
         <legend>{L_DOWNLOAD}</legend>
         <h1 class="attach_link"><a href="{U_REGISTER}" style="color: brown;">{L_DOWNLOAD_INFO}</a></h1>
         <p id="guest-dl-tip" class="attach_comment med">
+            <a href="{#FILELIST_URL#}{TOPIC_ID}" class="med"><b>{L_BT_FLIST_LINK_TITLE}</b></a> &middot;
             <a href="{$bb_cfg['how_to_download_url_help']}" class="med"><b>{L_HOW_TO_DOWNLOAD}</b></a> &middot;
             <a href="{$bb_cfg['what_is_torrent_url_help']}" class="med"><b>{L_WHAT_IS_A_TORRENT}</b></a> &middot;
             <a href="{$bb_cfg['ratio_url_help']}" class="med"><b>{L_RATINGS_AND_LIMITATIONS}</b></a><br/>