function perm_change_tag(PaperInfo $prow, $tag, $previndex, $index, $forceShow = null)
{
global $Conf;
if ($this->can_change_tag($prow, $tag, $previndex, $index, $forceShow)) {
return null;
}
$rights = $this->rights($prow, $forceShow);
$whyNot = $prow->initial_whynot();
$whyNot["tag"] = $tag;
if (!$this->isPC) {
$whyNot["permission"] = true;
} else {
if ($rights->conflict_type > 0) {
$whyNot["conflict"] = true;
if ($rights->allow_administer) {
$whyNot["forceShow"] = true;
}
} else {
if (!$Conf->timePCViewPaper($prow, false)) {
if ($prow->timeWithdrawn > 0) {
$whyNot["withdrawn"] = true;
} else {
$whyNot["notSubmitted"] = true;
}
} else {
$tag = TagInfo::base($tag);
$twiddle = strpos($tag, "~");
if ($twiddle === 0 && $tag[1] === "~" || $twiddle > 0 && substr($tag, 0, $twiddle) != $this->contactId) {
$whyNot["otherTwiddleTag"] = true;
} else {
if ($twiddle !== false) {
$whyNot["voteTagNegative"] = true;
} else {
$t = TagInfo::defined_tag($tag);
if ($t && $t->vote) {
$whyNot["voteTag"] = true;
} else {
$whyNot["chairTag"] = true;
}
}
}
}
}
}
return $whyNot;
}
public function prepare(PaperList $pl, $visible)
{
if (!$pl->contact->can_view_any_peruser_tags($this->tag)) {
return false;
}
if ($visible) {
$pl->qopts["tags"] = 1;
}
$dt = TagInfo::defined_tag($this->tag);
if (!$dt || $dt->rank || !$dt->vote && !$dt->approval) {
$this->viewtype = 0;
} else {
$this->viewtype = $dt->approval ? 1 : 2;
}
return true;
}
