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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "sync/engine/conflict_util.h"
#include "sync/syncable/mutable_entry.h"
namespace syncer {
using syncable::BASE_VERSION;
using syncable::IS_UNAPPLIED_UPDATE;
using syncable::IS_UNSYNCED;
using syncable::SERVER_VERSION;
using syncable::MutableEntry;
namespace conflict_util {
// Allow the server's changes to take precedence.
// This will take effect during the next ApplyUpdates step.
void IgnoreLocalChanges(MutableEntry* entry) {
DCHECK(entry->Get(IS_UNSYNCED));
DCHECK(entry->Get(IS_UNAPPLIED_UPDATE));
entry->Put(IS_UNSYNCED, false);
}
// Overwrite the server with our own value.
// We will commit our local data, overwriting the server, at the next
// opportunity.
void OverwriteServerChanges(MutableEntry* entry) {
DCHECK(entry->Get(IS_UNSYNCED));
DCHECK(entry->Get(IS_UNAPPLIED_UPDATE));
entry->Put(BASE_VERSION, entry->Get(SERVER_VERSION));
entry->Put(IS_UNAPPLIED_UPDATE, false);
}
// Having determined that everything matches, we ignore the non-conflict.
void IgnoreConflict(MutableEntry* entry) {
// If we didn't also unset IS_UNAPPLIED_UPDATE, then we would lose unsynced
// positional data from adjacent entries when the server update gets applied
// and the item is re-inserted into the PREV_ID/NEXT_ID linked list. This is
// primarily an issue because we commit after applying updates, and is most
// commonly seen when positional changes are made while a passphrase is
// required (and hence there will be many encryption conflicts).
DCHECK(entry->Get(IS_UNSYNCED));
DCHECK(entry->Get(IS_UNAPPLIED_UPDATE));
entry->Put(BASE_VERSION, entry->Get(SERVER_VERSION));
entry->Put(IS_UNAPPLIED_UPDATE, false);
entry->Put(IS_UNSYNCED, false);
}
} // namespace conflict_util
} // namespace syncer
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