internal RegionFinder()
{
_regionEndpointProviderV3 = new RegionEndpointProviderV3();
_regionEndpoints = BuildRegionEndpoints();
_root = BuildRoot();
_logger = Logger.GetLogger(typeof(RegionFinder));
}
private EndpointSegment FindExactRegion(IList <string> segments, int segmentIndex, EndpointSegment currentEndpointSegment)
{
// Return null if there doesn't exist a matching region
if (segmentIndex < 0)
{
return(null);
}
var segment = segments[segmentIndex];
// Move down in the tree, if there exists a child node
var nextEndpointSegment = currentEndpointSegment.Children.FirstOrDefault(endpointSegment => endpointSegment.Value.Equals(segment));
if (nextEndpointSegment != null)
{
currentEndpointSegment = nextEndpointSegment;
}
// Return the value of node if exception is configured with return value
if (currentEndpointSegment.UseThisValue)
{
return(currentEndpointSegment);
}
// Check for the region
var valueToCheck = string.Empty;
var dashedSegments = segment.Split('-');
for (var dashedSegmentIndex = dashedSegments.Length - 1; dashedSegmentIndex >= 0; dashedSegmentIndex--)
{
valueToCheck = string.IsNullOrEmpty(valueToCheck) ? dashedSegments[dashedSegmentIndex] : $"{dashedSegments[dashedSegmentIndex]}-{valueToCheck}";
if (_regionEndpoints.ContainsKey(valueToCheck))
{
return(new EndpointSegment()
{
RegionEndpoint = _regionEndpoints[valueToCheck],
UseThisValue = true
});
}
}
return(FindExactRegion(segments, segmentIndex - 1, currentEndpointSegment));
}
