public static IDiffResult <T> Diff <T, TKey, TData>(
this IEnumerable <T> previous,
IEnumerable <T> current,
Func <T, TKey> keySelector,
Func <T, TData> dataSelector
)
{
if (keySelector == null)
{
throw new ArgumentNullException(nameof(keySelector));
}
if (dataSelector == null)
{
throw new ArgumentNullException(nameof(dataSelector));
}
var diffContext = new DiffContext <T, TKey>(previous, current, keySelector);
var modifiedKeys = diffContext.SelectModifiedKeys(dataSelector).ToArray();
var unmodifiedKeys = diffContext.SelectIntersectingKeys().Except(modifiedKeys).ToArray();
return(new DiffResult <T>
{
Removed = SelectValues(diffContext.Previous, diffContext.SelectRemovedKeys()),
Added = SelectValues(diffContext.Current, diffContext.SelectAddedKeys()),
Modified = SelectValues(diffContext.Current, modifiedKeys),
Unmodified = SelectValues(diffContext.Current, unmodifiedKeys)
});
}
public static IEnumerable <T> SelectAdded <T, TKey>(
this IEnumerable <T> previous,
IEnumerable <T> current,
Func <T, TKey> keySelector
)
{
if (keySelector == null)
{
throw new ArgumentNullException(nameof(keySelector));
}
var diffContext = new DiffContext <T, TKey>(previous, current, keySelector);
return(SelectValues(diffContext.Current, diffContext.SelectAddedKeys()));
}