<?php

final class DifferentialTransactionComment
  extends PhabricatorApplicationTransactionComment {

  protected $revisionPHID;
  protected $changesetID;
  protected $isNewFile = 0;
  protected $lineNumber = 0;
  protected $lineLength = 0;
  protected $fixedState;
  protected $hasReplies = 0;
  protected $replyToCommentPHID;

  public function getApplicationTransactionObject() {
    return new DifferentialTransaction();
  }

  public function shouldUseMarkupCache($field) {
    // Only cache submitted comments.
    return ($this->getTransactionPHID() != null);
  }

  public static function sortAndGroupInlines(
    array $inlines,
    array $changesets) {
    assert_instances_of($inlines, 'DifferentialTransaction');
    assert_instances_of($changesets, 'DifferentialChangeset');

    $changesets = mpull($changesets, null, 'getID');
    $changesets = msort($changesets, 'getFilename');

    // Group the changesets by file and reorder them by display order.
    $inline_groups = array();
    foreach ($inlines as $inline) {
      $changeset_id = $inline->getComment()->getChangesetID();
      $inline_groups[$changeset_id][] = $inline;
    }
    $inline_groups = array_select_keys($inline_groups, array_keys($changesets));

    foreach ($inline_groups as $changeset_id => $group) {
      // Sort the group of inlines by line number.
      $items = array();
      foreach ($group as $inline) {
        $comment = $inline->getComment();
        $num = $comment->getLineNumber();
        $len = $comment->getLineLength();
        $id = $comment->getID();

        $items[] = array(
          'inline' => $inline,
          'sort' => sprintf('~%010d%010d%010d', $num, $len, $id),
        );
      }

      $items = isort($items, 'sort');
      $items = ipull($items, 'inline');
      $inline_groups[$changeset_id] = $items;
    }

    return $inline_groups;
  }

}