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|
open Brr
module PM = Prosemirror
module Js = Js_of_ocaml.Js
type events =
| DeleteEvent
| StoreEvent
| LoadEvent of Jstr.t option
| AddEvent
| CloseEvent of Forms.Events.kind option
| GEvent of Forms.Events.event
let key_of_title
: Jstr.t -> Jstr.t
= fun title ->
title
(** [update] is the event loop.
The function take a new event, and apply it to the current state. *)
let update
: 'a option Note.E.send -> (events, State.t) Application.t
= fun close_sender event state ->
match event with
| GEvent (Event (t, (module Handler))) ->
Handler.on_close t state
| AddEvent ->
let title = Jstr.v "Nouvelle page" in
let popup = Ui.popup
~title
~form:(Some (Forms.Add_page.create ()))
close_sender in
{ state with window = popup::state.window}
| DeleteEvent ->
begin match state.page_id with
| None -> state
| Some page_id ->
let title = Jstr.v "Confirmation" in
let popup = Ui.popup
~title
~form:(Some (Forms.Delete_page.create page_id))
close_sender in
{ state with window = popup::state.window}
end
| CloseEvent res ->
let state = match state.window with
| [] -> { state with window = [] }
| el::tl -> El.remove el
; { state with window = tl } in
(* The actions is confirmed by the user. Handle the form result *)
begin match res with
(* Delete the current page, then load the home page *)
| Some (Forms.Delete_page.DeletePage id) ->
State.Storage.delete (fun () -> Some id);
let json = State.Storage.load None in
State.load_page None state json
(* Add a new page *)
| Some (Forms.Add_page.AddPage {title}) ->
let page_id = key_of_title title in
let new_date = (new%js Js.date_now)##getTime in
let content_obj = object%js
val content = Js.null
val title = Js.some title
val date = Js.some new_date
end in
State.load_page (Some page_id) state content_obj
| _ -> state
end
| StoreEvent ->
let title_element = Document.find_el_by_id G.document (Jstr.v "title") in
let content = Option.map
(fun el -> El.prop (El.Prop.value) el)
title_element in
let new_date = (new%js Js.date_now)##getTime in
let content_obj = object%js
val content = Js.some @@ Jv.Id.to_jv (state.view##.state##toJSON ())
val title = Js.Opt.option content
val date = Js.some new_date
end in
let save = State.Storage.save
content_obj
state.page_id
~check:(fun previous_state ->
Js.Opt.case previous_state##.date
(fun () -> true)
(fun date ->
(* I do not figure how the previous date could be older
than the last backup. It could be either :
- equal (if we are the only one to update it)
- more recent (if the content has been updated elsewhere)
but older shoud be a bug. *)
date <= state.last_backup)) in
begin match save with
| Ok true -> { state with last_backup = new_date }
| other ->
(* TODO In case of error, notify the user *)
Console.(log [other]);
state
end
| LoadEvent page_id ->
let json = State.Storage.load page_id in
State.load_page page_id state json
|
