sharp-chat/SharpChat/Commands/ChannelRankCommand.cs

using SharpChat.Packet;
using System.Linq;

namespace SharpChat.Commands {
    public class ChannelRankCommand : IUserCommand {
        public bool IsMatch(UserCommandContext ctx) {
            return ctx.NameEquals("rank")
                || ctx.NameEquals("privilege")
                || ctx.NameEquals("priv");
        }

        public void Dispatch(UserCommandContext ctx) {
            if(!ctx.User.Permissions.HasFlag(UserPermissions.SetChannelHierarchy) || !ctx.Channel.IsOwner(ctx.User)) {
                ctx.Chat.SendTo(ctx.User, new CommandNotAllowedErrorPacket(ctx.Name));
                return;
            }

            if(!ctx.Args.Any() || !int.TryParse(ctx.Args.First(), out int chanHierarchy) || chanHierarchy > ctx.User.Rank) {
                ctx.Chat.SendTo(ctx.User, new ChannelRankTooHighErrorPacket());
                return;
            }

            ctx.Chat.UpdateChannel(ctx.Channel, minRank: chanHierarchy);
            ctx.Chat.SendTo(ctx.User, new ChannelRankChangedResponsePacket());
        }
    }
}