gacha.cs

public override async Task OnAtMessage(TBot z, Message msg) {
    if (msg.Author.Id != App.MeId || msg.Content != "!抽装扮")
        return;

    var ctx = _store.Contexts.First();
    string[] dynamicIds = ["901551426888532038", "901677050380681222"];
    var userPossibilities = new Dictionary<string, int>();
    var replies = new List<BiliUserContext.ReplyRecord>();

    foreach (var id in dynamicIds) {
        var dyn = await ctx.GetDynamic(id);
        var commentId = dyn["data"]!["item"]!["basic"]!["comment_id_str"]!.Value<string>();
        var commentType = dyn["data"]["item"]["basic"]["comment_type"]!.Value<string>();
        var comments = await ctx.GetReplyList(commentId, commentType);
        var reactions = await ctx.GetReactionList(id);
        var reposts = reactions.Where(a => a.Type == BiliUserContext.ReactionType.Repost).ToList();
        replies.AddRange(comments);

        foreach (var comment in comments) {
            if (comment.Time > new DateTime(2024, 2, 26, 12, 0, 0))
                continue;

            userPossibilities.TryAdd(comment.UserId, 0);
            userPossibilities[comment.UserId] += reposts.Any(a => a.UserId == comment.UserId) ? 5 : 1;
        }
    }

    var users = userPossibilities.Keys.ToList();
    users.Sort((a, b) => long.Parse(a).CompareTo(long.Parse(b)));

    foreach (var u in userPossibilities) {
        Logger.LogTrace($"{u.Key}: {u.Value}");
    }

    var sb = new StringBuilder();
    var seed = 297702;

    sb.AppendLine($"## 任务");
    sb.AppendLine($"> 随机数种子：{seed}\n");
    sb.AppendLine($"> 动态：{string.Join(", ", dynamicIds)}\n");
    sb.AppendLine($"> 规则：评论+1, 转发+5, 不重复得奖\n");
    sb.AppendLine($"## 结果");
    var rnd = new Random(seed);
    var suiteConsume = new Queue<int>([37, 38, 39, 40, 41, 42, 43, 44, 49, 53]);
    while (suiteConsume.Count != 0) {
        var suite = suiteConsume.Dequeue();
        var total = 0;
        var map = new List<string>();
        foreach (var user in users) {
            map.AddRange(Enumerable.Repeat(user, userPossibilities[user]));
            total += userPossibilities[user];
        }

        var select = rnd.Next(0, total);
        var userId = map[select];
        var userName = replies.First(a => a.UserId == userId).Username;
        sb.AppendLine($"- {suite}: {userName} {map[select]} ({select}/{total})");

        users.Remove(userId);
    }

    var image = await MarkdownRenderer.Instance.MarkdownSnapshot(sb.ToString());
    await z.api.GetMessageApi().SendMessageAsync(msg.ChannelId, imageData: image, passiveMsgId: msg.Id);
}