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phab/src/infrastructure/diff/view/PHUIDiffInlineThreader.php
d1842929afaafeature/better-testing

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PHUIDiffInlineThreader.php
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<?php
final class PHUIDiffInlineThreader extends Phobject {
public function reorderAndThreadCommments(array $comments) {
$comments = msort($comments, 'getID');
// Build an empty map of all the comments we actually have. If a comment
// is a reply but the parent has gone missing, we don't want it to vanish
// completely.
$comment_phids = mpull($comments, 'getPHID');
$replies = array_fill_keys($comment_phids, array());
// Now, remove all comments which are replies, leaving only the top-level
// comments.
foreach ($comments as $key => $comment) {
$reply_phid = $comment->getReplyToCommentPHID();
if (isset($replies[$reply_phid])) {
$replies[$reply_phid][] = $comment;
unset($comments[$key]);
}
}
// For each top level comment, add the comment, then add any replies
// to it. Do this recursively so threads are shown in threaded order.
$results = array();
foreach ($comments as $comment) {
$results[] = $comment;
$phid = $comment->getPHID();
$descendants = $this->getInlineReplies($replies, $phid, 1);
foreach ($descendants as $descendant) {
$results[] = $descendant;
}
}
// If we have anything left, they were cyclic references. Just dump
// them in a the end. This should be impossible, but users are very
// creative.
foreach ($replies as $phid => $comments) {
foreach ($comments as $comment) {
$results[] = $comment;
}
}
return $results;
}
private function getInlineReplies(array &$replies, $phid, $depth) {
$comments = idx($replies, $phid, array());
unset($replies[$phid]);
$results = array();
foreach ($comments as $comment) {
$results[] = $comment;
$descendants = $this->getInlineReplies(
$replies,
$comment->getPHID(),
$depth + 1);
foreach ($descendants as $descendant) {
$results[] = $descendant;
}
}
return $results;
}
}
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