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using System.Collections.Generic;
using System.Threading.Tasks;
using MongoDB.Driver;
namespace Server.Utils;
public record IAsyncCusorAsyncEnumerator<T>(IAsyncCursor<T> Cursor) {
private IEnumerator<T>? enumerator = null;
public T Current => enumerator!.Current;
public async Task<bool> MoveNextAsync() {
bool result;
if (enumerator != null) {
result = enumerator.MoveNext();
if (result) return true;
}
result = await Cursor.MoveNextAsync();
if (result) {
enumerator = Cursor.Current.GetEnumerator();
return true;
}
return false;
}
}
public static class IAsyncCursorExtensions {
public static IAsyncCusorAsyncEnumerator<T> GetAsyncEnumerator<T>(this IAsyncCursor<T> cursor) {
return new(cursor);
}
}