private IEnumerable <SyncConflict> CheckForDuplicates(IDbConnection connection)
{
var conflicts = new List <SyncConflict>();
var changedItemInfos = _store.LocateChangedItems(_remoteKnowledge).ToList();
foreach (string itemType in _store.GetItemTypes())
{
IDbCommand getInsertedItemsCommand = connection.CreateCommand();
getInsertedItemsCommand.CommandText =
String.Format(
"SELECT ItemID, SyncStatus, ItemType, GlobalCreatedReplica, CreatedTickCount, GlobalModifiedReplica, ModifiedTickCount, ItemData FROM SyncItems WHERE SyncStatus={0} AND ItemType='{1}'",
(int)SyncStatus.Insert, itemType);
using (IDataReader reader = getInsertedItemsCommand.ExecuteReader())
{
while (reader != null && reader.Read())
{
long itemId = Convert.ToInt64(reader["ItemID"]);
IReplicaInfo createdReplicaInfo = SessionDbHelper.ReplicaInfoFromDataReader(reader, "Created");
IReplicaInfo modifiedReplicaInfo = SessionDbHelper.ReplicaInfoFromDataReader(reader, "Modified");
ISyncableItemInfo remoteItemInfo = new SyncableItemInfo
{
ItemType = itemType,
Created = createdReplicaInfo,
Modified = modifiedReplicaInfo,
Deleted = false
};
var remoteItemData = JObject.Parse((string)reader["ItemData"]);
foreach (var changedItemInfo in changedItemInfos)
{
if (changedItemInfo.ItemType != remoteItemInfo.ItemType)
{
continue;
}
if (SyncUtil.KnowledgeContains(_remoteKnowledge, changedItemInfo.Created))
{
continue;
}
// Inserted here without remote knowledge, could be a dup
var builder = SyncUtil.JsonItemFromSyncableItemInfo(changedItemInfo);
_store.BuildItemData(changedItemInfo, builder);
var localItemData = new JObject {
{ "item", builder }
};
DuplicateStatus dupStatus = _store.GetDuplicateStatus(remoteItemInfo.ItemType, localItemData,
remoteItemData);
if (dupStatus == DuplicateStatus.Exact)
{
SessionDbHelper.ReplaceAllItemRefs(connection, _store, remoteItemInfo, changedItemInfo);
long tickCount = _store.IncrementLocalRepilcaTickCount();
IReplicaInfo modifiedReplica = new ReplicaInfo
{
ReplicaId = _store.GetLocalReplicaId(),
ReplicaTickCount = tickCount
};
SessionDbHelper.ResolveItemNoData(connection, remoteItemInfo,
SyncStatus.DeleteNonExisting, modifiedReplica);
break;
}
if (dupStatus == DuplicateStatus.Possible)
{
// TODO: clean this up, this call does more than we need
SessionDbHelper.ResolveItemNoData(connection, remoteItemInfo, SyncStatus.InsertConflict,
remoteItemInfo.Modified);
conflicts.Add(new SyncConflict(itemId, SyncStatus.InsertConflict, changedItemInfo,
remoteItemInfo));
break;
}
}
}
}
}
return(conflicts);
}
private IEnumerable <SyncConflict> LoadConflicts(IDbConnection connection)
{
var conflicts = new List <SyncConflict>();
IDbCommand getInsertedItemsCommand = connection.CreateCommand();
getInsertedItemsCommand.CommandText =
String.Format(
"SELECT ItemID, SyncStatus, ItemType, GlobalCreatedReplica, CreatedTickCount, GlobalModifiedReplica, ModifiedTickCount, ItemData FROM SyncItems WHERE SyncStatus NOT IN ({0},{1},{2},{3},{4},{5})",
(int)SyncStatus.Insert,
(int)SyncStatus.Update,
(int)SyncStatus.Delete,
(int)SyncStatus.DeleteNonExisting,
(int)SyncStatus.MayBeNeeded,
(int)SyncStatus.InsertConflict
);
using (var reader = getInsertedItemsCommand.ExecuteReader())
{
while (reader != null && reader.Read())
{
var createdReplicaInfo = SessionDbHelper.ReplicaInfoFromDataReader(reader, "Created");
var modifiedReplicaInfo = SessionDbHelper.ReplicaInfoFromDataReader(reader, "Modified");
var itemType = (string)reader["ItemType"];
var remoteItemInfo = new SyncableItemInfo
{
ItemType = itemType,
Created = createdReplicaInfo,
Modified = modifiedReplicaInfo,
Deleted = false
};
var itemId = Convert.ToInt64(reader["ItemID"]);
var status = (SyncStatus)reader["SyncStatus"];
ISyncableItemInfo localItemInfo = _store.LocateCurrentItemInfo(remoteItemInfo);
if (status == SyncStatus.UpdateConflict)
{
// Check to see if the "conflict" is actually an exact same update
var builder = SyncUtil.JsonItemFromSyncableItemInfo(localItemInfo);
_store.BuildItemData(localItemInfo, builder);
var localItemData = new JObject {
{ "item", builder }
};
var remoteItemData = JObject.Parse((string)reader["ItemData"]);
var dupStatus = _store.GetDuplicateStatus(remoteItemInfo.ItemType, localItemData,
remoteItemData);
if (dupStatus == DuplicateStatus.Exact)
{
var tickCount = _store.IncrementLocalRepilcaTickCount();
var modifiedReplica = new ReplicaInfo
{
ReplicaId = _store.GetLocalReplicaId(),
ReplicaTickCount = tickCount
};
SessionDbHelper.ResolveItemNoData(connection, remoteItemInfo, SyncStatus.Update,
modifiedReplica);
// TODO: Really should have an update status that just updates the modified repos without doing everything else, but this should work
continue;
}
}
conflicts.Add(new SyncConflict(itemId, status, localItemInfo, remoteItemInfo));
}
}
return(conflicts);
}
