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tiles are cached and reused properly

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This commit is contained in:
Anton Martynenko
2025-10-29 14:42:54 +01:00
parent caa30e5017
commit afd83ba8ae
2 changed files with 65 additions and 72 deletions
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SatelliteProvider.Services/TileService.cs
+32 -58
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@@ -46,72 +46,46 @@ public class TileService : ITileService
}
var centerPoint = new GeoPoint(latitude, longitude);
var downloadedTiles = await _downloader.GetTilesWithMetadataAsync(centerPoint, sizeMeters / 2, zoomLevel, cancellationToken);
var downloadedTiles = await _downloader.GetTilesWithMetadataAsync(
centerPoint,
sizeMeters / 2,
zoomLevel,
existingTilesList,
cancellationToken);
_logger.LogInformation("Downloaded {Count} tiles from Google:", downloadedTiles.Count);
foreach (var dt in downloadedTiles)
{
_logger.LogInformation(" Downloaded: Lat={Lat:F12}, Lon={Lon:F12}, Zoom={Zoom}", dt.CenterLatitude, dt.CenterLongitude, dt.ZoomLevel);
}
_logger.LogInformation("Downloaded {Count} new tiles from Google", downloadedTiles.Count);
var result = new List<TileMetadata>();
int reusedCount = 0;
int downloadedCount = 0;
int reusedCount = existingTilesList.Count;
int downloadedCount = downloadedTiles.Count;
foreach (var existingTile in existingTilesList)
{
result.Add(MapToMetadata(existingTile));
}
foreach (var downloadedTile in downloadedTiles)
{
var existingTile = existingTilesList.FirstOrDefault(t =>
Math.Abs(t.Latitude - downloadedTile.CenterLatitude) < 0.0001 &&
Math.Abs(t.Longitude - downloadedTile.CenterLongitude) < 0.0001 &&
t.ZoomLevel == downloadedTile.ZoomLevel);
if (existingTile != null)
var now = DateTime.UtcNow;
var tileEntity = new TileEntity
{
reusedCount++;
_logger.LogInformation("REUSED tile at ({Lat:F12}, {Lon:F12}) - matched DB tile ID {Id}", downloadedTile.CenterLatitude, downloadedTile.CenterLongitude, existingTile.Id);
result.Add(MapToMetadata(existingTile));
}
else
{
downloadedCount++;
_logger.LogInformation("NEW tile needed at ({Lat:F12}, {Lon:F12}) - no match in DB", downloadedTile.CenterLatitude, downloadedTile.CenterLongitude);
var closestTile = existingTilesList
.Select(t => new {
Tile = t,
LatDiff = Math.Abs(t.Latitude - downloadedTile.CenterLatitude),
LonDiff = Math.Abs(t.Longitude - downloadedTile.CenterLongitude)
})
.OrderBy(x => x.LatDiff + x.LonDiff)
.FirstOrDefault();
if (closestTile != null)
{
_logger.LogInformation(" Closest DB tile: Lat={Lat:F12} (diff={LatDiff:F12}), Lon={Lon:F12} (diff={LonDiff:F12})",
closestTile.Tile.Latitude, closestTile.LatDiff, closestTile.Tile.Longitude, closestTile.LonDiff);
}
var now = DateTime.UtcNow;
var tileEntity = new TileEntity
{
Id = Guid.NewGuid(),
ZoomLevel = downloadedTile.ZoomLevel,
Latitude = downloadedTile.CenterLatitude,
Longitude = downloadedTile.CenterLongitude,
TileSizeMeters = downloadedTile.TileSizeMeters,
TileSizePixels = 256,
ImageType = "jpg",
MapsVersion = $"downloaded_{now:yyyy-MM-dd}",
Version = currentVersion,
FilePath = downloadedTile.FilePath,
CreatedAt = now,
UpdatedAt = now
};
Id = Guid.NewGuid(),
ZoomLevel = downloadedTile.ZoomLevel,
Latitude = downloadedTile.CenterLatitude,
Longitude = downloadedTile.CenterLongitude,
TileSizeMeters = downloadedTile.TileSizeMeters,
TileSizePixels = 256,
ImageType = "jpg",
MapsVersion = $"downloaded_{now:yyyy-MM-dd}",
Version = currentVersion,
FilePath = downloadedTile.FilePath,
CreatedAt = now,
UpdatedAt = now
};
await _tileRepository.InsertAsync(tileEntity);
_logger.LogInformation("Saved new tile {Id} at ({Lat:F12}, {Lon:F12}) version {Version}", tileEntity.Id, tileEntity.Latitude, tileEntity.Longitude, currentVersion);
result.Add(MapToMetadata(tileEntity));
}
await _tileRepository.InsertAsync(tileEntity);
_logger.LogInformation("Saved new tile {Id} at ({Lat:F12}, {Lon:F12}) version {Version}", tileEntity.Id, tileEntity.Latitude, tileEntity.Longitude, currentVersion);
result.Add(MapToMetadata(tileEntity));
}
_logger.LogInformation("Tile processing summary: {Reused} reused, {Downloaded} new", reusedCount, downloadedCount);