function render($sv)
 {
     global $Conf;
     // Tags
     $tagger = new Tagger();
     echo "<h3 class=\"settings\">Tags</h3>\n";
     echo "<table class=\"secondary-settings\"><tbody>";
     $sv->set_oldv("tag_chair", join(" ", array_keys(TagInfo::chair_tags())));
     $sv->echo_entry_row("tag_chair", "Chair-only tags", "PC members can view these tags, but only administrators can change them.");
     $sv->set_oldv("tag_sitewide", join(" ", array_keys(TagInfo::sitewide_tags())));
     if ($sv->newv("tag_sitewide") || $Conf->has_any_manager()) {
         $sv->echo_entry_row("tag_sitewide", "Site-wide tags", "Chairs and administrators can view and change these tags for every paper.");
     }
     $sv->set_oldv("tag_approval", join(" ", array_keys(TagInfo::approval_tags())));
     $sv->echo_entry_row("tag_approval", "Approval voting tags", "<a href=\"" . hoturl("help", "t=votetags") . "\">What is this?</a>");
     $x = [];
     foreach (TagInfo::vote_tags() as $n => $v) {
         $x[] = "{$n}#{$v}";
     }
     $sv->set_oldv("tag_vote", join(" ", $x));
     $sv->echo_entry_row("tag_vote", "Allotment voting tags", "“vote#10” declares an allotment of 10 votes per PC member. <span class=\"barsep\">·</span> <a href=\"" . hoturl("help", "t=votetags") . "\">What is this?</a>");
     $sv->set_oldv("tag_rank", $Conf->setting_data("tag_rank", ""));
     $sv->echo_entry_row("tag_rank", "Ranking tag", "The <a href='" . hoturl("offline") . "'>offline reviewing page</a> will expose support for uploading rankings by this tag. <span class='barsep'>·</span> <a href='" . hoturl("help", "t=ranking") . "'>What is this?</a>");
     echo "</tbody></table>";
     echo "<div class='g'></div>\n";
     $sv->echo_checkbox('tag_seeall', "PC can see tags for conflicted papers");
     preg_match_all('_(\\S+)=(\\S+)_', $Conf->setting_data("tag_color", ""), $m, PREG_SET_ORDER);
     $tag_colors = array();
     foreach ($m as $x) {
         $tag_colors[TagInfo::canonical_color($x[2])][] = $x[1];
     }
     $tag_colors_rows = array();
     foreach (explode("|", TagInfo::BASIC_COLORS) as $k) {
         if ($sv->use_req()) {
             $v = defval($sv->req, "tag_color_{$k}", "");
         } else {
             if (isset($tag_colors[$k])) {
                 $v = join(" ", $tag_colors[$k]);
             } else {
                 $v = "";
             }
         }
         $tag_colors_rows[] = "<tr class='k0 {$k}tag'><td class='lxcaption'></td><td class='lxcaption taghl'>{$k}</td><td class='lentry' style='font-size: 10.5pt'><input type='text' name='tag_color_{$k}' value=\"" . htmlspecialchars($v) . "\" size='40' /></td></tr>";
         /* MAINSIZE */
     }
     preg_match_all('_(\\S+)=(\\S+)_', $Conf->setting_data("tag_badge", ""), $m, PREG_SET_ORDER);
     $tag_badges = array();
     foreach ($m as $x) {
         $tag_badges[$x[2]][] = $x[1];
     }
     foreach (["black" => "black label", "red" => "red label", "green" => "green label", "blue" => "blue label", "white" => "white label"] as $k => $desc) {
         if ($sv->use_req()) {
             $v = defval($sv->req, "tag_badge_{$k}", "");
         } else {
             if (isset($tag_badges[$k])) {
                 $v = join(" ", $tag_badges[$k]);
             } else {
                 $v = "";
             }
         }
         $tag_colors_rows[] = "<tr class='k0'><td class='lxcaption'></td><td class='lxcaption'><span class='badge {$k}badge' style='margin:0'>{$desc}</span><td class='lentry' style='font-size:10.5pt'><input type='text' name='tag_badge_{$k}' value=\"" . htmlspecialchars($v) . "\" size='40' /></td></tr>";
         /* MAINSIZE */
     }
     echo Ht::hidden("has_tag_color", 1), '<h3 class="settings g">Styles and colors</h3>', "<div class='hint'>Papers and PC members tagged with a style name, or with one of the associated tags, will appear in that style in lists.</div>", "<div class='smg'></div>", "<table id='foldtag_color'><tr><th colspan='2'>Style name</th><th>Tags</th></tr>", join("", $tag_colors_rows), "</table>\n";
     echo '<h3 class="settings g">Tracks</h3>', "\n";
     echo "<div class='hint'>Tracks control the PC members allowed to view or review different sets of papers. <span class='barsep'>·</span> <a href=\"" . hoturl("help", "t=tracks") . "\">What is this?</a></div>", Ht::hidden("has_tracks", 1), "<div class=\"smg\"></div>\n";
     $this->do_track($sv, "", 0);
     $tracknum = 2;
     $trackj = $Conf->setting_json("tracks") ?: (object) array();
     // existing tracks
     foreach ($trackj as $trackname => $x) {
         if ($trackname !== "_") {
             $this->do_track($sv, $trackname, $tracknum);
             ++$tracknum;
         }
     }
     // new tracks (if error prevented saving)
     if ($sv->use_req()) {
         for ($i = 1; isset($sv->req["name_track{$i}"]); ++$i) {
             $trackname = trim($sv->req["name_track{$i}"]);
             if (!isset($trackj->{$trackname})) {
                 $this->do_track($sv, $trackname, $tracknum);
                 ++$tracknum;
             }
         }
     }
     // catchall track
     $this->do_track($sv, "_", 1);
     echo Ht::button("Add track", array("onclick" => "settings_add_track()"));
 }
 public static function strip_nonsitewide($tags, Contact $user)
 {
     $x = ["\\&"];
     foreach (TagInfo::sitewide_tags() as $t => $tinfo) {
         $x[] = preg_quote($t) . "[ #=]";
     }
     $re = "{ (?:(?!" . $user->contactId . "~)\\d+~|~+|(?!" . join("|", $x) . ")\\S)\\S*}i";
     return trim(preg_replace($re, "", " {$tags} "));
 }