calculon 0.4 · OCaml Package

Plugins

A plugin is a bunch of commands, and optionally some disk-backed state. It will register its commands to the core loop

type json = Yojson.Safe.json

type action =

| Require_reload
(*
Require that we reload everything from on-disk state
*)
| Require_save
(*
Require that the state be saved
*)

type action_callback = action Signal.Send_ref.t

type stateful =

| St : 'st stateful_ -> stateful

A stateful plugin, using a persistent state 'st

and 'st stateful_ = private {

name : string;
(*
Namespace for storing state. Must be distinct for every plugin.
*)
commands : 'st -> Command.t list;
(*
Commands parametrized by some (mutable) state, with the ability to trigger a signal
*)
on_msg : 'st -> (Core.t -> Irc_message.t -> unit Lwt.t) list;
(*
Executed on each incoming message
*)
to_json : 'st -> json option;
(*
How to serialize (part of) the state into JSON, if need be.
*)
of_json : action_callback -> json option -> ('st, string) Result.result Lwt.t;
(*
How to deserialize the state. None is passed for a fresh initialization.
*)
stop : 'st -> unit Lwt.t;
(*
Stop the plugin. It is NOT the responsibility of this command to save the state, as the core engine will have called to_json before.
*)

}

type t =

| Stateful of stateful
| Stateless of Command.t list

A single plugin

type plugin = t

val of_cmd : Command.t -> t

Stateless plugin with 1 command.

val of_cmds : Command.t list -> t

Stateless plugin with several commands.

raises Invalid_argument
if the list is empty

val stateful : 
  name:string ->
  commands:('st -> Command.t list) ->
  ?on_msg:('st -> (Core.t -> Irc_message.t -> unit Lwt.t) list) ->
  to_json:('st -> json option) ->
  of_json:(action_callback -> json option -> ('st, string) Result.result Lwt.t) ->
  ?stop:('st -> unit Lwt.t) ->
  unit ->
  t

Make a stateful plugin using the given name (for prefixing its storage; this should be unique) and ways to serialize state to Json, deserialize state from Json, and building commands from the state. See stateful_ for more details on each field.

module Set : sig ... end

package calculon

Plugins