/// <summary>
/// コンストラクタ。
/// </summary>
/// <param name="reaction">リアクション</param>
/// <param name="message">メッセージ</param>
/// <param name="users">ReactionLogIDとユーザ一覧</param>
public ReactionLogCollection(Reaction reaction, Message message, List <ReactionLog>?users = null)
{
this.Reaction = reaction;
this.Users = users ?? new List <ReactionLog>();
// リアクション追加、削除時のイベント設定
this.OnReactionAdded += (_, reaction) => MessageService.AddReaction(message, reaction);
this.OnReactionRemoved += (_, reactionLog) => MessageService.RemoveReaction(message, reactionLog);
}