public static async Task SaveAllMetadatasAsync(this MediaMetaDatabaseContext context, ICollection <MediaMetadata> metas)
{
// Time and log serialization.
using (new DisposableLogger(DatabaseLog.SerializationBegin, (sw) => DatabaseLog.SerializationEnd(sw, metas.Count)))
{
var fullList = await context.MediaMetaJsons.Include(m => m.Labels).ToListAsync();
foreach (var meta in metas)
{
// If any MediaMetaJson has a set of labels that are equal to the ones of meta, then update it.
var toUpdate = fullList.FirstOrDefault(mmj =>
{
return(mmj.Labels.ListEquals(meta.Labels));
});
// If there is an existing item to update.
if (toUpdate != null)
{
var metaJson = await MediaMetaJson.FromMediaMetaAsync(meta);
toUpdate.Json = metaJson.Json;
}
else // If a new item needs to be added.
{
meta.DateAdded = DateTime.Now;
var metaJson = await MediaMetaJson.FromMediaMetaAsync(meta);
context.MediaMetaJsons.Add(metaJson);
}
}
}
try
{
// Time and log saving of MediaMetaJsons.
using (new DisposableLogger(DatabaseLog.SaveBegin, (sw) => DatabaseLog.SaveEnd(sw, metas.Count)))
{
await context.SaveChangesAsync();
}
}
catch (Exception e)
{
// Log Exception.
LifecycleLog.Exception(e);
}
}
