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Editing File: /home/ubuntu/code_review/arcanist/src/query/ArcanistMercurialWorkingCopyRevisionHardpointQuery.php

<?php

final class ArcanistMercurialWorkingCopyRevisionHardpointQuery
  extends ArcanistWorkflowMercurialHardpointQuery {

public function getHardpoints() {
    return array(
      ArcanistWorkingCopyStateRef::HARDPOINT_REVISIONREFS,
    );
  }

protected function canLoadRef(ArcanistRef $ref) {
    return ($ref instanceof ArcanistWorkingCopyStateRef);
  }

public function loadHardpoint(array $refs, $hardpoint) {
    yield $this->yieldRequests(
      $refs,
      array(
        ArcanistWorkingCopyStateRef::HARDPOINT_COMMITREF,
      ));

// TODO: This has a lot in common with the Git query in the same role.

$hashes = array();
    $map = array();
    foreach ($refs as $ref_key => $ref) {
      $commit = $ref->getCommitRef();

$commit_hashes = array();

$commit_hashes[] = array(
        'hgcm',
        $commit->getCommitHash(),
      );

foreach ($commit_hashes as $hash) {
        $hashes[] = $hash;
        $hash_key = $this->getHashKey($hash);
        $map[$hash_key][$ref_key] = $ref;
      }
    }

$results = array_fill_keys(array_keys($refs), array());
    if ($hashes) {
      $revisions = (yield $this->yieldConduit(
        'differential.query',
        array(
          'commitHashes' => $hashes,
        )));

foreach ($revisions as $dict) {
        $revision_hashes = idx($dict, 'hashes');
        if (!$revision_hashes) {
          continue;
        }

$revision_ref = ArcanistRevisionRef::newFromConduitQuery($dict);
        foreach ($revision_hashes as $revision_hash) {
          $hash_key = $this->getHashKey($revision_hash);
          $state_refs = idx($map, $hash_key, array());
          foreach ($state_refs as $ref_key => $state_ref) {
            $results[$ref_key][] = $revision_ref;
          }
        }
      }
    }

yield $this->yieldMap($results);
  }

private function getHashKey(array $hash) {
    return $hash[0].':'.$hash[1];
  }

}

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