public InventoryService(IInventoryDataService dataService, IUserService userService, ITransactionDataService transactionDataService, ITransactionSubTypeService transactionSubTypeService)
{
this._dataService = dataService;
this._userService = userService;
this._transactionDataService = transactionDataService;
this._transactionSubTypeService = transactionSubTypeService;
}
public InfiniteScrollViewModel(IInventoryDataService inventoryDataService)
{
_inventoryDataService = inventoryDataService;
_pagingSubject = new BehaviorSubject <IPageRequest>(new PageRequest(0, pageSize));
Func <InventoryItemViewModel, bool> Search(string searchTerm) =>
viewModel =>
{
if (string.IsNullOrEmpty(searchTerm))
{
return(true);
}
var lower = searchTerm.ToLower();
return(viewModel.Brand.ToLower().Contains(lower) || (viewModel.Coffee?.ToLower().Contains(lower) ?? false));
};
var searchChanged =
this.WhenAnyValue(x => x.SearchText)
.Throttle(TimeSpan.FromMilliseconds(800), RxApp.TaskpoolScheduler)
.DistinctUntilChanged()
.Select(Search);
_inventoryDataService
.ChangeSet
.Transform(x =>
new InventoryItemViewModel
{
Id = x.Id,
Brand = x.BrandName,
Coffee = x.CoffeeName,
Roast = x.Roast,
Packaging = x.Packaging
})
.AutoRefresh(x => x.Id)
.DeferUntilLoaded()
.Filter(searchChanged)
.Sort(SortExpressionComparer <InventoryItemViewModel> .Descending(x => x.Roast))
.Page(_pagingSubject.AsObservable())
.ObserveOn(RxApp.MainThreadScheduler)
.Bind(out _items)
.DisposeMany()
.Subscribe()
.DisposeWith(Garbage);
this.WhenAnyObservable(x => x.Refresh.IsExecuting)
.StartWith(false)
.DistinctUntilChanged()
.ToProperty(this, nameof(IsRefreshing), out _isRefreshing, deferSubscription: true)
.DisposeWith(Garbage);
this.WhenAnyObservable(x => x.Load.IsExecuting)
.ToProperty(this, nameof(IsLoading), out _isLoading, deferSubscription: true)
.DisposeWith(Garbage);
Refresh = ReactiveCommand.CreateFromObservable <EventArgs, Unit>(ExecuteRefresh);
Load = ReactiveCommand.CreateFromObservable <int, Unit>(ExecuteLoad);
_pagingSubject.DisposeWith(Garbage);
}
public InfiniteCollectionViewModel(IInventoryDataService inventoryDataService)
{
_inventoryDataService = inventoryDataService;
_pagingSubject = new BehaviorSubject <IPageRequest>(new PageRequest(0, _pageSize));
_inventoryDataService
.ChangeSet
.Transform(x => new InfiniteItemViewModel(x))
.Sort(SortExpressionComparer <InfiniteItemViewModel> .Ascending(x => x.Id))
.Page(_pagingSubject.AsObservable())
.Bind(out _inventory)
.DisposeMany()
.Subscribe()
.DisposeWith(ViewModelSubscriptions);
Load = ReactiveCommand.CreateFromObservable(ExecuteLoad);
}