ToDiffableDataSourceSnapshot <TSection, TItem>(this Dictionary <TSection, List <TItem> > dict)
{
var snapshot = new NSDiffableDataSourceSnapshot <IdentifierType <TSection>, IdentifierType <TItem> >();
foreach (var kvp in dict)
{
var section = IdentifierType.For(kvp.Key);
var items = kvp.Value.Select(IdentifierType.For).ToArray();
snapshot.AppendSections(new[] { section });
snapshot.AppendItems(items);
}
return(snapshot);
}
ToDiffableDataSourceSnapshot <TSection, TSectionIdentifier, TItem, TItemIdentifier>(
this IEnumerable <TSection> sections, Func <TSection, TSectionIdentifier> getSectionIdentifier,
Func <TSection, IEnumerable <TItem> > getItems, Func <TItem, TItemIdentifier> getItemIdentifier)
{
var snapshot = new NSDiffableDataSourceSnapshot <IdentifierType <TSection>, IdentifierType <TItem> >();
foreach (var section in sections)
{
var items = getItems(section);
var sectionIdentifier = IdentifierType.For(section, getSectionIdentifier);
var itemIdentifiers = items.Select(item => IdentifierType.For(item, getItemIdentifier)).ToArray();
snapshot.AppendSections(new[] { sectionIdentifier });
snapshot.AppendItems(itemIdentifiers);
}
return(snapshot);
}
ToDiffableDataSourceSnapshot <TObject, TSection, TItem>(
this TObject obj,
Func <TObject, IEnumerable <TSection> > getSections,
Func <TSection, IEnumerable <TItem> > getItems)
{
var snapshot = new NSDiffableDataSourceSnapshot <IdentifierType <TSection>, IdentifierType <TItem> >();
foreach (var section in getSections(obj))
{
var items = getItems(section);
var sectionIdentifier = IdentifierType.For(section);
var itemIdentifiers = items.Select(IdentifierType.For).ToArray();
snapshot.AppendSections(new[] { sectionIdentifier });
snapshot.AppendItems(itemIdentifiers);
}
return(snapshot);
}
