| | | 1 | | using Chronicis.Shared.DTOs.Maps; |
| | | 2 | | |
| | | 3 | | namespace Chronicis.Client.Utilities; |
| | | 4 | | |
| | | 5 | | internal static class MapLayerVisibilityEvaluator |
| | | 6 | | { |
| | | 7 | | public static HashSet<Guid> GetEffectivelyVisibleLayerIds(IReadOnlyCollection<MapLayerDto> layers) |
| | | 8 | | { |
| | 819 | 9 | | if (layers.Count == 0) |
| | | 10 | | { |
| | 5 | 11 | | return []; |
| | | 12 | | } |
| | | 13 | | |
| | 814 | 14 | | var layersById = new Dictionary<Guid, MapLayerDto>(layers.Count); |
| | 8104 | 15 | | foreach (var layer in layers) |
| | | 16 | | { |
| | 3238 | 17 | | layersById[layer.MapLayerId] = layer; |
| | | 18 | | } |
| | 814 | 19 | | var visibleLayerIds = new HashSet<Guid>(); |
| | 8104 | 20 | | foreach (var layer in layers) |
| | | 21 | | { |
| | 3238 | 22 | | if (IsEffectivelyVisible(layer, layersById)) |
| | | 23 | | { |
| | 1607 | 24 | | visibleLayerIds.Add(layer.MapLayerId); |
| | | 25 | | } |
| | | 26 | | } |
| | | 27 | | |
| | 814 | 28 | | return visibleLayerIds; |
| | | 29 | | } |
| | | 30 | | |
| | | 31 | | public static bool IsEffectivelyVisible(MapLayerDto layer, IReadOnlyDictionary<Guid, MapLayerDto> layersById) |
| | | 32 | | { |
| | 3243 | 33 | | if (!layer.IsEnabled) |
| | | 34 | | { |
| | 818 | 35 | | return false; |
| | | 36 | | } |
| | | 37 | | |
| | 2425 | 38 | | var visitedLayerIds = new HashSet<Guid> { layer.MapLayerId }; |
| | 2425 | 39 | | var currentParentId = layer.ParentLayerId; |
| | 3229 | 40 | | while (currentParentId.HasValue) |
| | | 41 | | { |
| | 1621 | 42 | | if (!layersById.TryGetValue(currentParentId.Value, out var parentLayer)) |
| | | 43 | | { |
| | 2 | 44 | | return false; |
| | | 45 | | } |
| | | 46 | | |
| | 1619 | 47 | | if (!visitedLayerIds.Add(currentParentId.Value)) |
| | | 48 | | { |
| | 1 | 49 | | return false; |
| | | 50 | | } |
| | | 51 | | |
| | 1618 | 52 | | if (!parentLayer.IsEnabled) |
| | | 53 | | { |
| | 814 | 54 | | return false; |
| | | 55 | | } |
| | | 56 | | |
| | 804 | 57 | | currentParentId = parentLayer.ParentLayerId; |
| | | 58 | | } |
| | | 59 | | |
| | 1608 | 60 | | return true; |
| | | 61 | | } |
| | | 62 | | } |