public ScreenDefinition(string relativeRoute, ViewModelCreator <TViewModel> defaultViewModelCreator)
{
RelativeRoute = relativeRoute.Trim();
IsParameterRoute = RelativeRoute.StartsWith("{") && RelativeRoute.EndsWith("}");
ParameterName = RelativeRoute.Substring(1, RelativeRoute.Length - 2);
DefaultViewModelCreator = defaultViewModelCreator ?? throw new ArgumentNullException(nameof(defaultViewModelCreator));
}
public RoutedDataModel GetRouteDataModel(PageUrlData pageUrlData)
{
if (pageUrlData.PageId != _pageId)
{
return(null);
}
string pathInfo = pageUrlData.PathInfo;
bool pathIsEmpty = string.IsNullOrEmpty(pathInfo);
if (pathIsEmpty && !pageUrlData.HasQueryParameters)
{
return(new RoutedDataModel(GetDataQueryable));
}
int totalSegments = _mapper.PathSegmentsCount;
if (pathIsEmpty != (totalSegments == 0))
{
return(null);
}
string[] segments = !pathIsEmpty
? pathInfo.Split(new[] { '/' }, StringSplitOptions.RemoveEmptyEntries)
: new string[0];
if (segments.Length != totalSegments)
{
return(null);
}
var relativeRoute = new RelativeRoute
{
PathSegments = segments,
QueryString = pageUrlData.QueryParameters
};
var filterExpression = GetPredicate(_pageId, relativeRoute);
if (filterExpression == null)
{
return(null);
}
var dataSet = (IReadOnlyCollection <IData>)_getFilteredDataMethodInfo.MakeGenericMethod(_dataType)
.Invoke(null, new object[] { filterExpression });
if (dataSet.Count == 0)
{
return(null);
}
if (dataSet.Count > 1)
{
throw new DataUrlCollisionException(_dataType, relativeRoute);
}
return(new RoutedDataModel(dataSet.First()));
}
public Expression <Func <DateTime, bool> > GetPredicate(Guid pageId, RelativeRoute route)
{
int year, month, day;
if (!int.TryParse(route.PathSegments[0], out year) || year < 0 || year > 10000)
{
return(null);
}
if (_format == DateSegmentFormat.Year)
{
return(date => date.Year == year);
}
if (!int.TryParse(route.PathSegments[1], out month) || month < 1 || month > 12)
{
return(null);
}
if (_format == DateSegmentFormat.YearMonth)
{
return(date => date.Year == year && date.Month == month);
}
if (!int.TryParse(route.PathSegments[2], out day) || day <1 || day> DateTime.DaysInMonth(year, month))
{
return(null);
}
return(date => date.Year == year && date.Month == month && date.Day == day);
}
internal static IRelativeFilePath AsFilePath(this string pathString, RelativeRoute routingBase)
{
return(AsFilePath(pathString,
() => routingBase.GetFilePath(pathString),
ext => routingBase.GetFilePathWithExtension(pathString, ext)));
}
private Expression GetPredicate(Guid pageId, RelativeRoute relativeRoute)
{
var @interface = typeof(IRelativeRouteToPredicateMapper <>).MakeGenericType(_dataType);
return(@interface.GetMethod("GetPredicate").Invoke(_mapper, new object[] { pageId, relativeRoute }) as Expression);
}
public RoutedDataModel GetRouteDataModel(PageUrlData pageUrlData)
{
if (pageUrlData.PageId != _pageId) return null;
string pathInfo = pageUrlData.PathInfo;
bool pathIsEmpty = string.IsNullOrEmpty(pathInfo);
int pathInfoSegmentsExpected = _mapper.PathSegmentsCount;
if (pathIsEmpty && (pathInfoSegmentsExpected > 0 || !pageUrlData.HasQueryParameters))
{
return new RoutedDataModel(GetDataQueryable);
}
if (pathIsEmpty != (pathInfoSegmentsExpected == 0))
{
return null;
}
string[] segments = !pathIsEmpty
? pathInfo.Split(new[] {'/'}, StringSplitOptions.RemoveEmptyEntries)
: Array.Empty<string>();
if (segments.Length != pathInfoSegmentsExpected)
{
return null;
}
var relativeRoute = new RelativeRoute
{
PathSegments = segments,
QueryString = pageUrlData.QueryParameters
};
var valueProvider = _mapper as AttributeBasedRoutingHelper.IRelativeRouteResover;
if (valueProvider != null)
{
var data = valueProvider.TryGetData(pageUrlData.PageId, relativeRoute);
return data != null ? new RoutedDataModel(data) : null;
}
var filterExpression = GetPredicate(_pageId, relativeRoute);
if (filterExpression == null)
{
return null;
}
var dataSet = (IReadOnlyCollection<IData>) _getFilteredDataMethodInfo.MakeGenericMethod(_dataType)
.Invoke(null, new object[] {filterExpression});
if (dataSet.Count == 0)
{
return null;
}
if (dataSet.Count > 1)
{
throw new DataUrlCollisionException(_dataType, relativeRoute);
}
return new RoutedDataModel(dataSet.First());
}
