open! Import
include Router_types

type t = user

let make nick ~userinfo ~outbox =
  {
    outbox;
    userinfo;
    nick;
    nick_key = string_ci nick;
    user_mode = Irc.Mode.Set.empty;
    away = None;
    membership = Dllist.create ();
  }

let outbox t = t.outbox
let nick t = t.nick
let mode t = t.user_mode
let set_mode t new_mode = t.user_mode <- new_mode
let away t = t.away
let set_away t status = t.away <- status

let set_nick t new_nick =
  begin
    t.nick <- new_nick;
    t.nick_key <- string_ci new_nick;
  end

let register t ~router =
  begin
    Hashtbl.add router.users t.nick_key t;
    Cache.add router.whowas t.nick_key (t.nick, t.userinfo);
    router.lusers <- succ router.lusers;
  end

let unregister t ~router =
  begin
    Hashtbl.remove router.users t.nick_key;
    router.lusers <- pred router.lusers;
  end

let is_registered t ~router = Hashtbl.mem router.users t.nick_key

let prefix t =
  Irc.Msg.User_prefix (t.nick, Some t.userinfo)

let membership t =
  Dllist.fold_r (fun m xs -> m :: xs) t.membership []

let channels t =
  Dllist.fold_r (fun m xs -> m.mem_chan :: xs) t.membership []

let highest_membership_priv t =
  Dllist.fold_r (fun m p -> max m.mem_priv p) t.membership Normal

let is_member t chan =
  Dllist.exists (fun m -> m.mem_chan == chan)
    t.membership

let find_common_channel t1 t2 =
  let mem = Dllist.find (fun m -> is_member t2 m.mem_chan) t1.membership in
  mem.mem_chan