private async Task Bootstrap()
{
_logger.LogInformation($"[{Name}] Checking Bootstrap Status...");
var start = DateTime.UtcNow;
var totalCount = 0;
var missingCellIds = new List <ulong>();
// Loop all geofences and get s2cells within each
foreach (var polygon in MultiPolygon)
{
// Get max amount of s2 level 15 cells within this geofence
var s2Cells = polygon.GetS2CellIds(15, int.MaxValue);
var s2CellIds = s2Cells.Select(x => x.Id).ToList();
totalCount += s2CellIds.Count;
// Get all known cells from the database
var cells = await _cellRepository.GetByIdsAsync(s2CellIds, false).ConfigureAwait(false);
// Map to just s2cell ids
var existingCellIds = cells.Select(x => x.Id).ToList();
// Loop all s2cells within geofence and check if any are missing
foreach (var s2cellId in s2CellIds)
{
// Check if we don't have the s2cell in the database
if (!existingCellIds.Contains(s2cellId))
{
// Add to bootstrap s2cell list
missingCellIds.Add(s2cellId);
}
}
}
missingCellIds = missingCellIds.Distinct().ToList();
missingCellIds.Sort();
_logger.LogInformation($"[{Name}] Bootstrap Status: {totalCount - missingCellIds.Count}/{totalCount} after {DateTime.UtcNow.Subtract(start).TotalSeconds:N0} seconds");
lock (_bootstrapLock)
{
_bootstrapCellIds = missingCellIds;
_bootstrapTotalCount = totalCount;
}
}