package shakuhachi

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package shakuhachi
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Source file misc.ml

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(*****************************************************************************)
(*                                                                           *)
(*  Copyright (C) 2026 Yves Ndiaye                                           *)
(*                                                                           *)
(* This Source Code Form is subject to the terms of the Mozilla Public       *)
(* License, v. 2.0. If a copy of the MPL was not distributed with this       *)
(* file, You can obtain one at https://mozilla.org/MPL/2.0/.                 *)
(*                                                                           *)
(*****************************************************************************)

module Keys = struct
  let unicode_nf = "unicode_normalization_form"
end

module Default = struct
  let unicode_normalization_form : Uunf.form = `NFC
end

module Unicode = struct
  let form_of_string = function
    | "nfd" ->
        `NFD
    | "nfkd" ->
        `NFKD
    | "nfkc" ->
        `NFKC
    | "nfc" ->
        `NFC
    | _ ->
        `NFC

  let form_to_string = function
    | `NFC ->
        "nfc"
    | `NFD ->
        "nfd"
    | `NFKD ->
        "nfkd"
    | `NFKC ->
        "nfkc"
end

type t = { unicode_normalization_form : Uunf.form }

let section = "misc"
let default : t = { unicode_normalization_form = `NFC }
let init ~unicode_normalization_form = { unicode_normalization_form }

(*let conv ~default key section =
  match Section.assoc key section with Some e -> e | None -> default*)

let of_section section =
  let unicode_normalization_form =
    section
    |> Section.assoc Keys.unicode_nf
    |> Option.map Unicode.form_of_string
    |> Option.value ~default:Default.unicode_normalization_form
  in
  { unicode_normalization_form }

let to_section t =
  let unicode = Unicode.form_to_string t.unicode_normalization_form in
  Section.init section [ (Keys.unicode_nf, unicode) ]

let unicode_normalization_form t = t.unicode_normalization_form