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a_tag.php
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a_tag.php
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<?php
// a_tag.php -- HotCRP assignment helper classes
// Copyright (c) 2006-2019 Eddie Kohler; see LICENSE.
class NextTagAssigner {
private $tag;
public $pidindex = array();
private $first_index;
private $next_index;
private $isseq;
function __construct($state, $tag, $index, $isseq) {
$this->tag = $tag;
$ltag = strtolower($tag);
$res = $state->query(array("type" => "tag", "ltag" => $ltag));
foreach ($res as $x)
$this->pidindex[$x["pid"]] = (float) $x["_index"];
asort($this->pidindex);
if ($index === null) {
$indexes = array_values($this->pidindex);
sort($indexes);
$index = count($indexes) ? $indexes[count($indexes) - 1] : 0;
$index += ($isseq ? 1 : self::$value_increment_map[mt_rand(0, 9)]);
}
$this->first_index = $this->next_index = ceil($index);
$this->isseq = $isseq;
}
private static $value_increment_map = array(1, 1, 1, 1, 1, 2, 2, 2, 3, 4);
function next_index($isseq) {
$index = $this->next_index;
$this->next_index += ($isseq ? 1 : self::$value_increment_map[mt_rand(0, 9)]);
return (float) $index;
}
function apply_finisher(AssignmentState $state) {
if ($this->next_index == $this->first_index)
return;
$ltag = strtolower($this->tag);
foreach ($this->pidindex as $pid => $index)
if ($index >= $this->first_index && $index < $this->next_index) {
$x = $state->query_unmodified(array("type" => "tag", "pid" => $pid, "ltag" => $ltag));
if (!empty($x))
$item = $state->add(["type" => "tag", "pid" => $pid, "ltag" => $ltag,
"_tag" => $this->tag,
"_index" => $this->next_index($this->isseq),
"_override" => true]);
}
}
}
class Tag_AssignmentParser extends UserlessAssignmentParser {
const NEXT = 1;
const NEXTSEQ = 2;
private $remove;
private $isnext;
function __construct(Conf $conf, $aj) {
parent::__construct("tag");
$this->remove = $aj->remove;
if (!$this->remove && $aj->next)
$this->isnext = $aj->next === "seq" ? self::NEXTSEQ : self::NEXT;
}
function expand_papers($req, AssignmentState $state) {
return $this->isnext ? "ALL" : false;
}
static function load_tag_state(AssignmentState $state) {
if (!$state->mark_type("tag", ["pid", "ltag"], "Tag_Assigner::make"))
return;
$result = $state->conf->qe("select paperId, tag, tagIndex from PaperTag where paperId?a", $state->paper_ids());
while (($row = edb_row($result)))
$state->load(["type" => "tag", "pid" => +$row[0], "ltag" => strtolower($row[1]), "_tag" => $row[1], "_index" => (float) $row[2]]);
Dbl::free($result);
}
function load_state(AssignmentState $state) {
self::load_tag_state($state);
}
function allow_paper(PaperInfo $prow, AssignmentState $state) {
if (($whyNot = $state->user->perm_change_some_tag($prow)))
return whyNotText($whyNot);
else
return true;
}
private function cannot_view_error(PaperInfo $prow, $tag, AssignmentState $state) {
if ($prow->conflict_type($state->user))
$state->paper_error("You have a conflict with #{$prow->paperId}.");
else
$state->paper_error("You can’t view that tag for #{$prow->paperId}.");
return false;
}
function apply(PaperInfo $prow, Contact $contact, $req, AssignmentState $state) {
// tag argument (can have multiple space-separated tags)
if (($tag = trim((string) $req["tag"])) === "")
return "Tag missing.";
$tags = preg_split('/\s+/', $tag);
while (count($tags) > 1) {
$req["tag"] = array_pop($tags);
$this->apply($prow, $contact, $req, $state);
}
$tag = $tags[0];
// index argument
$xindex = $req["tag_value"];
if ($xindex !== null
&& ($xindex = trim($xindex)) !== "") {
$tag = preg_replace(',\A([-+]?#?.+)(?:[=!<>]=?|#|≠|≤|≥)(?:|-?\d+(?:\.\d*)?|-?\.\d+|any|all|none|clear)\z,i', '$1', $tag);
if (!preg_match(',\A(?:[=!<>]=?|#|≠|≤|≥),i', $xindex))
$xindex = "#" . $xindex;
$tag .= $xindex;
}
// tag parsing; see also PaperSearch::_check_tag
$remove = $this->remove;
if ($tag[0] === "-" && !$remove) {
$remove = true;
$tag = substr($tag, 1);
} else if ($tag[0] === "+" && !$remove)
$tag = substr($tag, 1);
if ($tag !== "" && $tag[0] === "#")
$tag = substr($tag, 1);
$m = array(null, "", "", "", "");
$xtag = $tag;
if (preg_match(',\A(.*?)(#|#?[=!<>]=?|#?≠|#?≤|#?≥)(.*?)\z,', $xtag, $xm)) {
list($xtag, $m[3], $m[4]) = array($xm[1], $xm[2], strtolower($xm[3]));
if ($m[3] === "#")
$m[3] = "=";
else if ($m[3][0] === "#")
$m[3] = substr($m[3], 1);
}
if ($xtag === "")
return "Empty tag.";
if (!preg_match(',\A(|[^#]*~)([a-zA-Z@*_:.]+[-+a-zA-Z0-9!@*_:.\/]*)\z,i', $xtag, $xm))
return "“" . htmlspecialchars($tag) . "”: Invalid tag.";
if ($m[3] && $m[4] === "")
return "“" . htmlspecialchars($tag) . "”: Tag value missing.";
if ($m[3] && !preg_match(',\A([-+]?(?:\d+(?:\.\d*)?|\.\d+)|any|all|none|clear)\z,', $m[4]))
return "“" . htmlspecialchars($tag) . "”: Tag value should be a number.";
list($m[1], $m[2]) = array($xm[1], $xm[2]);
if ($m[1] == "~" || strcasecmp($m[1], "me~") == 0)
$m[1] = ($contact->contactId ? : $state->user->contactId) . "~";
// ignore attempts to change vote tags
if (!$m[1] && $state->conf->tags()->is_votish($m[2]))
return true;
// add and remove use different paths
$remove = $remove || $m[4] === "none" || $m[4] === "clear";
if ($remove)
return $this->apply_remove($prow, $state, $m);
else if (strpos($tag, "*") !== false)
return "Tag wildcards aren’t allowed when adding tags.";
// resolve twiddle portion
if ($m[1] && $m[1] != "~~" && !ctype_digit(substr($m[1], 0, strlen($m[1]) - 1))) {
$c = substr($m[1], 0, strlen($m[1]) - 1);
$twiddlecids = ContactSearch::make_pc($c, $state->user)->ids;
if (empty($twiddlecids))
return "“" . htmlspecialchars($c) . "” doesn’t match a PC member.";
else if (count($twiddlecids) > 1)
return "“" . htmlspecialchars($c) . "” matches more than one PC member; be more specific to disambiguate.";
$m[1] = $twiddlecids[0] . "~";
}
// resolve tag portion
if (preg_match(',\A(?:none|any|all)\z,i', $m[2]))
return "Tag “{$tag}” is reserved.";
$tag = $m[1] . $m[2];
// resolve index portion
if ($m[3] && $m[3] !== "=" && $m[3] !== "==")
return "“" . htmlspecialchars($m[3]) . "” isn’t allowed when adding tags.";
if ($this->isnext)
$index = $this->apply_next_index($prow->paperId, $tag, $state, $m);
else
$index = $m[3] ? cvtnum($m[4], 0) : null;
// if you can't view the tag, you can't set the tag
// (information exposure)
if (!$state->user->can_view_tag($prow, $tag))
return $this->cannot_view_error($prow, $tag, $state);
// save assignment
$ltag = strtolower($tag);
if ($index === null
&& ($x = $state->query(["type" => "tag", "pid" => $prow->paperId, "ltag" => $ltag])))
$index = $x[0]["_index"];
$vtag = $state->conf->tags()->votish_base($tag);
if ($vtag && $state->conf->tags()->is_vote($vtag) && !$index)
$state->remove(["type" => "tag", "pid" => $prow->paperId, "ltag" => $ltag]);
else
$state->add(["type" => "tag", "pid" => $prow->paperId, "ltag" => $ltag,
"_tag" => $tag, "_index" => (float) $index]);
if ($vtag)
$this->account_votes($prow->paperId, $vtag, $state);
return true;
}
private function apply_next_index($pid, $tag, AssignmentState $state, $m) {
$ltag = strtolower($tag);
$index = cvtnum($m[3] ? $m[4] : null, null);
// NB ignore $index on second & subsequent nexttag assignments
if (!($fin = get($state->finishers, "seqtag $ltag")))
$fin = $state->finishers["seqtag $ltag"] =
new NextTagAssigner($state, $tag, $index, $this->isnext === self::NEXTSEQ);
unset($fin->pidindex[$pid]);
return $fin->next_index($this->isnext === self::NEXTSEQ);
}
private function apply_remove(PaperInfo $prow, AssignmentState $state, $m) {
// resolve twiddle portion
if ($m[1] && $m[1] != "~~" && !ctype_digit(substr($m[1], 0, strlen($m[1]) - 1))) {
$c = substr($m[1], 0, strlen($m[1]) - 1);
if (strcasecmp($c, "any") == 0 || strcasecmp($c, "all") == 0 || $c === "*") {
$m[1] = "(?:\\d+)~";
} else {
$twiddlecids = ContactSearch::make_pc($c, $state->user)->ids;
if (empty($twiddlecids))
return "“" . htmlspecialchars($c) . "” doesn’t match a PC member.";
else if (count($twiddlecids) == 1)
$m[1] = $twiddlecids[0] . "~";
else
$m[1] = "(?:" . join("|", $twiddlecids) . ")~";
}
}
// resolve tag portion
$search_ltag = null;
if (strcasecmp($m[2], "none") == 0)
return true;
else if (strcasecmp($m[2], "any") == 0 || strcasecmp($m[2], "all") == 0) {
$cid = $state->user->contactId;
if ($state->user->privChair)
$cid = $state->reviewer->contactId;
if ($m[1])
$m[2] = "[^~]*";
else if ($state->user->privChair && $state->reviewer->privChair)
$m[2] = "(?:~~|{$cid}~|)[^~]*";
else
$m[2] = "(?:{$cid}~|)[^~]*";
} else {
if (!preg_match(',[*(],', $m[1] . $m[2]))
$search_ltag = strtolower($m[1] . $m[2]);
$m[2] = str_replace("\\*", "[^~]*", preg_quote($m[2]));
}
// resolve index comparator
if (preg_match(',\A(?:any|all|none|clear)\z,i', $m[4]))
$m[3] = $m[4] = "";
else
$m[4] = cvtint($m[4], 0);
// if you can't view the tag, you can't clear the tag
// (information exposure)
if ($search_ltag && !$state->user->can_view_tag($prow, $search_ltag))
return $this->cannot_view_error($prow, $search_ltag, $state);
// query
$res = $state->query(array("type" => "tag", "pid" => $prow->paperId, "ltag" => $search_ltag));
$tag_re = '{\A' . $m[1] . $m[2] . '\z}i';
$vote_adjustments = array();
foreach ($res as $x)
if (preg_match($tag_re, $x["ltag"])
&& (!$m[3] || CountMatcher::compare($x["_index"], $m[3], $m[4]))
&& ($search_ltag
|| $state->user->can_change_tag($prow, $x["ltag"], $x["_index"], null))) {
$state->remove($x);
if (($v = $state->conf->tags()->votish_base($x["ltag"])))
$vote_adjustments[$v] = true;
}
foreach ($vote_adjustments as $vtag => $v)
$this->account_votes($prow->paperId, $vtag, $state);
return true;
}
private function account_votes($pid, $vtag, AssignmentState $state) {
$res = $state->query(array("type" => "tag", "pid" => $pid));
$tag_re = '{\A\d+~' . preg_quote($vtag) . '\z}i';
$is_vote = $state->conf->tags()->is_vote($vtag);
$total = 0.0;
foreach ($res as $x)
if (preg_match($tag_re, $x["ltag"]))
$total += $is_vote ? (float) $x["_index"] : 1.0;
$state->add(array("type" => "tag", "pid" => $pid, "ltag" => strtolower($vtag),
"_tag" => $vtag, "_index" => $total, "_vote" => true));
}
}
class Tag_Assigner extends Assigner {
private $tag;
private $index;
function __construct(AssignmentItem $item, AssignmentState $state) {
parent::__construct($item, $state);
$this->tag = $item["_tag"];
$this->index = $item->get(false, "_index");
if ($this->index == 0 && $item["_vote"])
$this->index = null;
}
static function make(AssignmentItem $item, AssignmentState $state) {
$prow = $state->prow($item["pid"]);
// check permissions
if (!$item["_vote"] && !$item["_override"]) {
$whyNot = $state->user->perm_change_tag($prow, $item["ltag"],
$item->get(true, "_index"), $item->get(false, "_index"));
if ($whyNot) {
if (get($whyNot, "otherTwiddleTag"))
return null;
throw new Exception(whyNotText($whyNot));
}
}
return new Tag_Assigner($item, $state);
}
function unparse_description() {
return "tag";
}
private function unparse_item($before) {
$index = $this->item->get($before, "_index");
return "#" . htmlspecialchars($this->item->get($before, "_tag"))
. ($index ? "#$index" : "");
}
function unparse_display(AssignmentSet $aset) {
$t = [];
if ($this->item->existed())
$t[] = '<del>' . $this->unparse_item(true) . '</del>';
if (!$this->item->deleted())
$t[] = '<ins>' . $this->unparse_item(false) . '</ins>';
return join(" ", $t);
}
function unparse_csv(AssignmentSet $aset, AssignmentCsv $acsv) {
$t = $this->tag;
if ($this->index === null)
return ["pid" => $this->pid, "action" => "cleartag", "tag" => $t];
else {
if ($this->index)
$t .= "#{$this->index}";
return ["pid" => $this->pid, "action" => "tag", "tag" => $t];
}
}
function account(AssignmentSet $aset, AssignmentCountSet $deltarev) {
$aset->show_column("tags");
}
function add_locks(AssignmentSet $aset, &$locks) {
$locks["PaperTag"] = "write";
}
function execute(AssignmentSet $aset) {
if ($this->index === null)
$aset->stage_qe("delete from PaperTag where paperId=? and tag=?", $this->pid, $this->tag);
else
$aset->stage_qe("insert into PaperTag set paperId=?, tag=?, tagIndex=? on duplicate key update tagIndex=values(tagIndex)", $this->pid, $this->tag, $this->index);
if ($this->index !== null
&& str_ends_with($this->tag, ':'))
$aset->cleanup_callback("colontag", function ($aset) {
$aset->conf->save_setting("has_colontag", 1);
$aset->conf->invalidate_caches("taginfo");
});
$aset->user->log_activity("Tag " . ($this->index === null ? "-" : "+") . "#$this->tag" . ($this->index ? "#$this->index" : ""), $this->pid);
$aset->cleanup_notify_tracker($this->pid);
}
}