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|
open Brr
module Js = Js_of_ocaml.Js
type events =
| StoreEvent
| LoadEvent of Jstr.t option
| ClosePopup of Forms.Events.event option
| Generic of Actions.Event.t
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
: (events, State.t) Application.t
= fun event state ->
match event with
| Generic (E (t, (module EventHandler))) ->
EventHandler.apply t state
| ClosePopup result ->
(* First close the last popin. *)
let state = match state.window with
| [] -> { state with window = [] }
| el::tl -> El.remove el
; { state with window = tl } in
(* Call the handler associated with the event *)
begin match result with
| None -> state
| Some (Event (t, (module Handler))) ->
Handler.on_close t 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. *)
let is_ok = date <= state.last_backup in
if (not is_ok) then (
let open Console in
log
[ Jstr.v "Last backup date is "
; new%js Js.date_fromTimeValue state.last_backup
; Jstr.v " but date is "
; new%js Js.date_fromTimeValue date] );
is_ok)) in
begin match save with
| Ok true -> { state with last_backup = new_date }
| Ok false ->
Console.(log [Jstr.v "Didn't save"]);
state
| Error other ->
(* TODO In case of error, notify the user *)
Console.(log [Jstr.v "Couldn't save" ; other]);
state
end
| LoadEvent page_id ->
let json = State.Storage.load page_id in
State.load_page page_id state json
|
