/// <summary>
/// Get the existing sync state for this item, if it exists and is of the appropriate
/// type, else null.
/// </summary>
/// <remarks>Outlook items are not true objects and don't have a common superclass,
/// so we have to use this rather clumsy overloading.</remarks>
/// <param name="contact">The item.</param>
/// <returns>The appropriate sync state, or null if none.</returns>
/// <exception cref="UnexpectedSyncStateClassException">if the sync state found is not of the expected class (shouldn't happen).</exception>
public ContactSyncState GetSyncState(Outlook.ContactItem contact)
{
SyncState result;
try
{
result = this.byOutlookId.ContainsKey(contact.EntryID) ? this.byOutlookId[contact.EntryID] : null;
CrmId crmId = CheckForDuplicateSyncState(result, contact.GetCrmId());
if (CrmId.IsValid(crmId))
{
if (result == null && this.byCrmId.ContainsKey(crmId))
{
result = this.byCrmId[crmId];
}
else if (result != null && this.byCrmId.ContainsKey(crmId) == false)
{
this.byCrmId[crmId] = result;
result.CrmEntryId = crmId;
}
}
if (result != null && result as ContactSyncState == null)
{
throw new UnexpectedSyncStateClassException("ContactSyncState", result);
}
}
catch (COMException)
{
// dead item passed.
result = null;
}
return(result as ContactSyncState);
}
/// <summary>
/// Create an appropriate sync state for an contact item.
/// </summary>
/// <remarks>Outlook items are not true objects and don't have a common superclass,
/// so we have to use this rather clumsy overloading.</remarks>
/// <param name="contact">The item.</param>
/// <returns>An appropriate sync state.</returns>
private ContactSyncState CreateSyncState(Outlook.ContactItem contact)
{
CrmId crmId = contact.GetCrmId();
ContactSyncState result;
if (CrmId.IsValid(crmId) && this.byCrmId.ContainsKey(crmId) && this.byCrmId[crmId] != null)
{
result = CheckUnexpectedFoundState <Outlook.ContactItem, ContactSyncState>(contact, crmId);
}
else
{
result = this.SetByOutlookId <ContactSyncState>(contact.EntryID,
new ContactSyncState(contact, crmId,
ParseDateTimeFromUserProperty(contact.UserProperties[ModifiedDatePropertyName])));
}
if (result != null && CrmId.IsValid(crmId))
{
this.byCrmId[crmId] = result;
}
return(result);
}
