private async Task BindFromUri(ModelMetadataProvider metadataProvider, HttpActionContext actionContext,
CancellationToken cancellationToken)
{
var uriBinding = _descriptor.BindWithAttribute(new FromUriAttribute());
await uriBinding.ExecuteBindingAsync(metadataProvider, actionContext, cancellationToken);
var bindedValue = GetValue(actionContext) as IClientQuery;
var query = GetValue(actionContext) as IClientQuery ??
Activator.CreateInstance(_descriptor.ParameterType) as IClientQuery;
if (bindedValue == null)
{
SetValue(actionContext, query);
}
var clientFilterable = query as IClientFilterable;
var clientSortable = query as IClientSortable;
var clientPageable = query as IClientPageable;
var queryString = actionContext.Request.GetQueryNameValuePairs()
.Where(x => Keys.KnownKeys.Contains(x.Key))
.ToDictionary(x => x.Key, x => (object)x.Value);
var routeDataValues = actionContext.Request.GetRouteData()
.Values
.Where(x => Keys.KnownKeys.Contains(x.Key));
var requestValues = queryString.Union(routeDataValues).ToDictionary(x => x.Key, x => x.Value);
if (queryString.ContainsKey(Keys.Filter) && clientFilterable != null)
{
var converter = new QueryStringFilterConverter();
var filter = (IFilter)converter.ConvertFrom(queryString[Keys.Filter]);
clientFilterable.ClientFilter = filter ?? new AlwaysTrueFilter();
}
if (queryString.ContainsKey(Keys.Sort) && clientSortable != null)
{
var converter = new SortTypeConverter();
var sort = (ISort)converter.ConvertFrom(queryString[Keys.Sort]);
clientSortable.ClientSort = sort ?? clientSortable.ClientSort ?? new RandomSort();
}
if ((queryString.ContainsKey(Keys.PageNumber) || queryString.ContainsKey(Keys.PageSize)) && clientPageable != null)
{
int pageNumber = 1, pageSize = 10;
var hasNumber = requestValues.ContainsKey(Keys.PageNumber) && int.TryParse(requestValues[Keys.PageNumber].ToString(), out pageNumber);
var hasSize = requestValues.ContainsKey(Keys.PageSize) && int.TryParse(requestValues[Keys.PageSize].ToString(), out pageSize);
var page = new ClientPage
{
PageNumber = hasNumber ? (int?)pageNumber : null,
PageSize = hasSize ? (int?)pageSize : null
};
clientPageable.ClientPage = page;
}
}
public void Can_Deserialize_And_Execute_Sort_From_Query_String()
{
const string text = "year DESC, make ASC";
var converter = new SortTypeConverter();
var sort = (ISort)converter.ConvertFrom(text);
Assert.IsNotNull(sort);
Assert.IsInstanceOfType(sort, typeof(DynamicLinqSort));
var expected = Cars.OrderByDescending(x => x.Year).ThenBy(x => x.Make).ToList();
var actual = sort.ToDelegate <Car>()(Cars.AsQueryable()).ToList();
Assert.IsTrue(expected.SequenceEqual(actual));
}
