private List <Revision> FindUnsyncedRevisions(
DateTime tfsWitWaterMark,
ITranslationService translationService,
Guid sourceId,
IsWorkItemRevisionProcessed isRevisionProcessed)
{
int workItemId = WorkItem.Id;
bool workItemHasReflectionOnTheOtherSide = WorkItemHasReflectionOnTheOtherSide(translationService, WorkItem.Id.ToString(), sourceId);
List <Revision> retVal = new List <Revision>(WorkItem.Revisions.Count);
foreach (Revision rev in WorkItem.Revisions)
{
int workItemRev = (int)rev.Fields[CoreField.Rev].Value;
if (!workItemHasReflectionOnTheOtherSide)
{
// NOTE: in the case that a work item is not migrated before, we should include all its revisions
// (including Rev1) in the delta table. The only exception is that we recorded to have computed
// delta for a particular revision
// it's possible we are re-processing the rev as we go back 60 sec in history
// use the call back to eliminate the possible duplicates
if (null != isRevisionProcessed && isRevisionProcessed(workItemId, workItemRev))
{
continue;
}
else
{
retVal.Add(rev);
}
}
else
{
// 1. skipping all revs that are prior to (HWM - 15sec)
DateTime revChangeDate = ((DateTime)rev.Fields[CoreField.ChangedDate].Value).ToUniversalTime();
if (revChangeDate <= tfsWitWaterMark)
{
continue;
}
// for work items that have been sync-ed by the tool, check if this revision is generated by it
if (workItemHasReflectionOnTheOtherSide &&
translationService.IsSyncGeneratedItemVersion(workItemId.ToString(), workItemRev.ToString(), sourceId))
{
continue;
}
// it's possible we are re-processing the rev as we go back 60 sec in history
// use the call back to eliminate the possible duplicates
if (null != isRevisionProcessed && isRevisionProcessed(workItemId, workItemRev))
{
continue;
}
retVal.Add(rev);
}
}
return(retVal);
}
internal void ComputeFieldDelta(
ChangeGroupService changeGroupService,
DateTime waterMarkChangeStartTime,
FieldValueComparer tfsValueComparer,
ITranslationService translationService,
ConfigurationService configService,
List <ChangeGroup> groups,
IsWorkItemRevisionProcessed processedRevCallBack)
{
Guid sourceId = configService.SourceId;
List <Revision> revsToBeSynced = FindUnsyncedRevisions(waterMarkChangeStartTime,
translationService,
sourceId,
processedRevCallBack);
Dictionary <int, object> fieldValueBaseline = new Dictionary <int, object>();
TryEstablishFieldValueBaseline(fieldValueBaseline, revsToBeSynced);
foreach (Revision rev in revsToBeSynced)
{
// get basic revision info: revision#, author#, and change time
int revIndex = (int)rev.Fields[CoreField.Rev].Value;
string author = (string)rev.Fields[CoreField.ChangedBy].Value;
if (string.IsNullOrEmpty(author))
{
author = (string)rev.Fields[CoreField.AuthorizedAs].Value;
}
DateTime changedDate = (DateTime)rev.Fields[CoreField.ChangedDate].Value;
List <Field> fieldForSync = new List <Field>();
List <Field> skippingFields = new List <Field>();
foreach (Field f in rev.Fields)
{
// filter out System.History with empty new value
if (TFStringComparer.FieldName.Equals(f.ReferenceName, CoreFieldReferenceNames.History))
{
if (string.IsNullOrEmpty(f.Value as string))
{
continue;
}
}
if (MustTakeField(f.FieldDefinition))
{
// find out fields that changed in this revision
object oldValue;
fieldValueBaseline.TryGetValue(f.Id, out oldValue);
//***Note: When it is a new work item (unmatched on the other side),
// we need to always include fields
if ((null != f.Value && (!tfsValueComparer.Equals(oldValue, f.Value) || revIndex == 1)) ||
(null == f.Value && null != oldValue && revIndex != 1))
{
fieldForSync.Add(f);
fieldValueBaseline[f.Id] = f.Value;
}
else if (IsReferencedField(f, configService))
{
skippingFields.Add(f);
}
}
else if (IsReferencedField(f, configService))
{
skippingFields.Add(f);
}
}
if (fieldForSync.Count == 0)
{
continue;
}
XmlDocument migrationActionDetails = CreateFieldRevisionDescriptionDoc(
revIndex, author, changedDate, fieldForSync, skippingFields);
Guid changeActionId = revIndex == 1 ?
WellKnownChangeActionId.Add : WellKnownChangeActionId.Edit;
/// TODO: consider batching revs of different workitems in one change group
ChangeGroup changeGroup = changeGroupService.CreateChangeGroupForDeltaTable(
string.Format("{0}:{1}", WorkItem.Id, revIndex));
IMigrationAction action = changeGroup.CreateAction(
changeActionId,
new TfsWITMigrationItem(WorkItem, revIndex),
WorkItem.Id.ToString(),
"",
revIndex.ToString(),
"",
WellKnownContentType.WorkItem.ReferenceName,
migrationActionDetails);
groups.Add(changeGroup);
}
}
