// retrieve global and per-instance tile packs
public async Task RefreshLayers()
{
// we don't want to do this more than once at the same time so we will need to track that.
// stop watching for filesystem changes while we download
watcher.EnableRaisingEvents = false;
// check for map packs first.
_logger.LogDebug("Starting Refreshing layers");
var packs = await PackContainer.List();
foreach (var pack in packs)
{
var thispackfile = Path.Combine(CurrentOptions.PackPath, pack);
if (await PackContainer.GetIfNewer(pack, thispackfile))
{
// extract pack to appropriate places
using (var zip = ZipFile.OpenRead(thispackfile))
{
foreach (var entry in zip.Entries)
{
var fn = Path.GetFileName(entry.FullName);
var ext = Path.GetExtension(fn);
if (ext.Equals(".json"))
{
var style = Path.Combine(CurrentOptions.StylePath, fn);
if (NeedToExtract(style, entry.Length))
{
_logger.LogDebug($"Extracting {style}.");
entry.ExtractToFile(style, true);
}
}
if (ext.Equals(".mbtiles"))
{
var tile = Path.Combine(CurrentOptions.TilePath, fn);
if (NeedToExtract(tile, entry.Length))
{
_logger.LogDebug($"Extracting {tile}.");
entry.ExtractToFile(tile, true);
OpenService(tile);
}
}
}
}
}
}
// see if there's any new standalone map layers
_logger.LogDebug("Checking for standalone layers");
var mbtiles = await TileContainer.List();
foreach (var mbtile in mbtiles)
{
var thismbtile = Path.Combine(CurrentOptions.TilePath, mbtile);
if (await PackContainer.GetIfNewer(mbtile, thismbtile))
{
OpenService(thismbtile);
}
}
// reenable watching for filesystem changes
watcher.EnableRaisingEvents = true;
_logger.LogDebug("Ending Refreshing layers");
}