record and display topic who + time

lib/server/chan.ml

@@ -3,16 +3,15 @@ include Router_types
 
 type t = chan
 
-let make ?creation_time name =
-  let creation_time = match creation_time with
+let value_or_now = function
   | None -> Ptime_clock.now ()
   | Some ts -> ts
-  in
-  {
+
+let make ?time name = {
     name;
     name_key = string_ci name;
-    creation_time;
-    topic = None;
+    creation_time = value_or_now time;
+    topic = None, None;
     members = Dllist.create ();
     member_count = 0;
     chan_mode = Mode.Set.empty;
@@ -22,8 +21,9 @@ let make ?creation_time name =
 
 let name t = t.name
 let creation_time t = t.creation_time
-let topic t = t.topic
-let set_topic t s = t.topic <- s
+let topic t = fst t.topic
+let topic_who_time t = snd t.topic
+let set_topic ~who ?time t text = t.topic <- text, Some (who, value_or_now time)
 let mode t = t.chan_mode
 let set_mode t new_mode = t.chan_mode <- new_mode
 let limit t = t.chan_limit

lib/server/connection.ml

@@ -386,14 +386,23 @@ let on_msg_names t name =
   list_names t me chan;
   Ok ()
 
+let get_topic_who_time t chan =
+  Option.iter
+    (fun (who, time) ->
+       reply t ("333", [Chan.name chan; who; Fmt.str "%a" pp_unixtime time]))
+    (Chan.topic_who_time chan)
+
 let get_topic ?(reply_if_missing=true) t chan =
   match Chan.topic chan with
   | Some topic ->
-    reply t ("332", [Chan.name chan; topic])
-  (* TODO: RPL_TOPICWHOTIME ? *)
+    reply t ("332", [Chan.name chan; topic]);
+    get_topic_who_time t chan
   | None ->
     if reply_if_missing then
-      reply t ("331", [Chan.name chan; "No topic is set"])
+      begin
+        reply t ("331", [Chan.name chan; "No topic is set"]);
+        get_topic_who_time t chan
+      end
 
 let set_topic chan topic =
   Chan.set_topic chan topic
@@ -421,7 +430,8 @@ let on_msg_topic t name args =
     let topic = String.concat " " args in
     let msg = Msg.make "TOPIC" [Chan.name chan; topic] ~always_trailing:true in
     Router.relay msg ~from:me [`to_chan chan; `to_self];
-    set_topic chan (if args = [""] then None else Some topic);
+    set_topic chan (if args = [""] then None else Some topic)
+      ~who:(User.nick me);
     Ok ()
 
 let join t user chan =

lib/server/router_types.ml

@@ -17,7 +17,7 @@ and chan = {
   name : name;
   name_key : string_ci;
   creation_time : Ptime.t;
-  mutable topic : string option;
+  mutable topic : string option * (name * Ptime.t) option;
   mutable members : membership Dllist.t;
   mutable member_count : int;
   mutable chan_mode : Mode.Set.t; (* +imstn *)