private bool CalculateBasedOnReferenceMessage(ICorePropertyBag message, IStorePropertyBag referenceItem, out ConversationIndex.FixupStage stage, out ConversationIndex newIndex)
{
bool result = true;
newIndex = ConversationIndex.Empty;
stage = ConversationIndex.FixupStage.Unknown;
if (this.indexTrackingEx != null)
{
string text = referenceItem.TryGetProperty(ItemSchema.InternetMessageId) as string;
if (text != null)
{
this.indexTrackingEx.Trace("S1", text);
}
}
string text2 = message.TryGetProperty(ItemSchema.NormalizedSubject) as string;
ConversationIndex conversationIndex;
bool flag = ConversationIndex.TryCreate(referenceItem.TryGetProperty(ItemSchema.ConversationIndex) as byte[], out conversationIndex);
ConversationIndex conversationIndex2;
bool flag2 = ConversationIndex.TryCreate(message.TryGetProperty(ItemSchema.ConversationIndex) as byte[], out conversationIndex2);
bool?flag3 = referenceItem.TryGetProperty(ItemSchema.ConversationIndexTracking) as bool?;
bool flag4 = flag3 == null || !flag3.Value;
if (flag)
{
string value = referenceItem.TryGetProperty(ItemSchema.ConversationTopic) as string;
if (string.IsNullOrEmpty(value) || (!string.IsNullOrEmpty(text2) && text2.EndsWith(value, StringComparison.OrdinalIgnoreCase)))
{
string text3 = message.TryGetProperty(ItemSchema.InReplyTo) as string;
string text4 = referenceItem.TryGetProperty(ItemSchema.InternetMessageId) as string;
if (!string.IsNullOrEmpty(text3) && !string.IsNullOrEmpty(text4) && string.Compare(text3, text4, StringComparison.OrdinalIgnoreCase) == 0)
{
if (conversationIndex.IsParentOf(conversationIndex2))
{
newIndex = conversationIndex2;
stage = (flag4 ? ConversationIndex.FixupStage.L1 : ConversationIndex.FixupStage.H1);
result = false;
}
else
{
ExDateTime?valueAsNullable = message.GetValueAsNullable <ExDateTime>(ItemSchema.SentTime);
if (valueAsNullable != null)
{
newIndex = ConversationIndex.CreateFromParent(conversationIndex.Bytes, valueAsNullable.Value);
}
else
{
newIndex = ConversationIndex.CreateFromParent(conversationIndex.Bytes);
}
stage = (flag4 ? ConversationIndex.FixupStage.L1 : ConversationIndex.FixupStage.H2);
}
}
else if (flag2)
{
if (conversationIndex.IsAncestorOf(conversationIndex2))
{
newIndex = conversationIndex2;
stage = (flag4 ? ConversationIndex.FixupStage.L1 : ConversationIndex.FixupStage.H1);
result = false;
}
else
{
newIndex = conversationIndex2.UpdateGuid(conversationIndex.Guid);
newIndex = newIndex.UpdateHeader(conversationIndex.Header);
stage = (flag4 ? ConversationIndex.FixupStage.L1 : ConversationIndex.FixupStage.H10);
}
}
else
{
newIndex = ConversationIndex.CreateFromParent(conversationIndex.Bytes);
stage = (flag4 ? ConversationIndex.FixupStage.L1 : ConversationIndex.FixupStage.H2);
}
}
else
{
newIndex = ConversationIndex.CreateNew();
stage = ConversationIndex.FixupStage.H3;
}
}
return(result);
}