public IssueAssigneeViewModel(
Func <Task <IReadOnlyList <User> > > loadAssignees,
Func <Task <User> > loadCurrentlyAssigned,
Func <User, Task> updateIssue
)
{
DismissCommand = ReactiveCommand.Create();
var derivedFunc = new Func <User, IssueAssigneeItemViewModel>(x =>
{
var vm = new IssueAssigneeItemViewModel(x);
if (_selectedUser != null)
{
vm.IsSelected = x.Id == _selectedUser.Id;
}
vm.GoToCommand
.Select(_ => vm.IsSelected ? x : null)
.Subscribe(user =>
{
foreach (var a in Assignees.Where(y => y != vm))
{
a.IsSelected = false;
}
updateIssue(user).ToBackground();
DismissCommand.ExecuteIfCan();
});
return(vm);
});
var assignees = new ReactiveList <User>();
Assignees = assignees.CreateDerivedCollection(
derivedFunc,
filter: x => x.Name.ContainsKeyword(SearchKeyword),
signalReset: this.WhenAnyValue(x => x.SearchKeyword));
LoadCommand = ReactiveCommand.CreateAsyncTask(async _ =>
{
_selectedUser = (await loadCurrentlyAssigned());
assignees.Reset(await loadAssignees());
});
}