private static void WriteToDebug(InterimChangeSet <Itinerary> list)
{
try
{
var leg = list.All.First().OutboundLeg;
}
catch (Exception e)
{
throw new InvalidDataException("The interim result contains legs that are NULL - this should not happen", e);
}
Debug.WriteLine($"Interim results recieved ! {list.All.Count()} "
+ $"total itineraries, {list.Additions.Count()} new "
+ $"and {list.Updates.Count()} updates. IsLast? " + list.IsLastChangeSet);
}
public InterimChangeSet <TResponseEntity> Calculate(TResponse response)
{
var newTopLevelElements = response.TopLevelElements;
InterimChangeSet <TResponseEntity> result;
if (_lastResponse == null)
{
// In case the lastresponse == null, in other words, this
// is the first time Handle is called - the full response is returned
result = new InterimChangeSet <TResponseEntity>(newTopLevelElements, null, null, response.Succeeded);
Debug.WriteLine($"Diff called for first time - with {newTopLevelElements.Count} top level elements");
}
else
{
var previousTopLevelElements = _lastResponse.TopLevelElements;
var unchanged = newTopLevelElements
.Select(element => new InterimPair <TResponseEntity>
{
New = element,
Original = previousTopLevelElements.FirstOrDefault(element.DeepEquals)
})
.Where(pair => pair.Original != null)
.ToList();
var unchangedNewItems = unchanged.Select(element => element.New).ToList();
var additions = newTopLevelElements
.Except(unchangedNewItems)
.Where(element => !previousTopLevelElements
.Contains(element, new ShallowEqualityComparer <TResponseEntity>()))
.ToList();
var updates = newTopLevelElements
.Except(unchangedNewItems)
.Except(additions)
.Select(element => new InterimPair <TResponseEntity>
{
New = element,
Original = previousTopLevelElements.FirstOrDefault(element.ShallowEquals)
})
.Where(pair => pair.Original != null)
.ToList();
Debug.WriteLine(
$"Diff found {additions.Count} new and {updates.Count} updated top level elements - "
+ $"now at {newTopLevelElements.Count} top level elements");
var mergedTopLevelElements = newTopLevelElements
.Except(unchangedNewItems)
.ToList();
mergedTopLevelElements.AddRange(unchanged.Select(element => element.Original));
result = new InterimChangeSet <TResponseEntity>(mergedTopLevelElements, additions, updates, response.Succeeded);
}
_lastResponse = response;
return(result);
}
private static void WriteToDebug(InterimChangeSet<Itinerary> list)
{
try
{
var leg = list.All.First().OutboundLeg;
}
catch(Exception e)
{
throw new InvalidDataException("The interim result contains legs that are NULL - this should not happen");
}
Debug.WriteLine($"Interim results recieved ! {list.All.Count()} "
+ $"total itineraries, {list.Additions.Count()} new "
+ $"and {list.Updates.Count()} updates. IsLast? " + list.IsLastChangeSet);
}
