// Computes the diffing for IEnumerable<object>.
// For BHoMObjects, it assumes that they all have a HashFragment assigned (like when they have been passed through a Revision).
// For non-BHoMObjects, it performs the VennDiagram comparision with a HashComparer.
// Results for BHoMObjects and non are concatenated.
private static Diff DiffRevisionObjects(IEnumerable <object> pastRevisionObjs, IEnumerable <object> followingRevisionObjs, DiffConfig diffConfig = null)
{
// Set configurations if diffConfig is null. Clone it for immutability in the UI.
DiffConfig diffConfigCopy = diffConfig == null ? new DiffConfig() : diffConfig.DeepClone() as DiffConfig;
// Dispatch the objects in BHoMObjects and generic objects.
IEnumerable <IBHoMObject> prevObjs_BHoM = pastRevisionObjs.OfType <IBHoMObject>();
IEnumerable <IBHoMObject> currObjs_BHoM = followingRevisionObjs.OfType <IBHoMObject>();
// If all objects are bhomobjects, just call the appropriate method
if (pastRevisionObjs.Count() != 0 && pastRevisionObjs.Count() == prevObjs_BHoM.Count() && followingRevisionObjs.Count() == currObjs_BHoM.Count())
{
return(DiffRevisionObjects(prevObjs_BHoM, currObjs_BHoM, diffConfigCopy));
}
IEnumerable <object> prevObjs_nonBHoM = pastRevisionObjs.Where(o => !(o is IBHoMObject));
IEnumerable <object> currObjs_nonBHoM = followingRevisionObjs.Where(o => !(o is IBHoMObject));
// Compute the specific Diffing for the BHoMObjects.
Diff diff = Compute.DiffRevisionObjects(prevObjs_BHoM, currObjs_BHoM, diffConfigCopy);
// Compute the generic Diffing for the other objects.
// This is left to the VennDiagram with a HashComparer.
VennDiagram <object> vd = Engine.Data.Create.VennDiagram(prevObjs_nonBHoM, currObjs_nonBHoM, new DiffingHashComparer <object>(diffConfig));
// Concatenate the results of the two diffing operations.
List <object> allPrevObjs = new List <object>();
List <object> allCurrObjs = new List <object>();
List <object> allUnchangedObjs = new List <object>();
allCurrObjs.AddRange(diff.AddedObjects);
allCurrObjs.AddRange(vd.OnlySet1);
allPrevObjs.AddRange(diff.RemovedObjects);
allPrevObjs.AddRange(vd.OnlySet2);
// Create the final, actual diff.
Diff finalDiff = new Diff(allCurrObjs, allPrevObjs, diff.ModifiedObjects, diffConfigCopy, diff.ModifiedPropsPerObject, diff.UnchangedObjects);
return(finalDiff);
}
