Source file `backend_json_helpers.ml`

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(******************************************************************************)
(*                                                                            *)
(* Copyright (c) 2026 Epure Team                                              *)
(* All rights reserved.                                                       *)
(*                                                                            *)
(******************************************************************************)

type json_string_map = (string * string) list

let json_string_map_to_yojson fields =
  `Assoc (List.map (fun (key, value) -> (key, `String value)) fields)

let json_string_map_of_yojson = function
  | `Assoc fields ->
      let rec loop acc = function
        | [] -> Ok (List.rev acc)
        | (key, `String value) :: rest -> loop ((key, value) :: acc) rest
        | (key, _) :: _ -> Error (Printf.sprintf "expected string for %s" key)
      in
      loop [] fields
  | _ -> Error "expected JSON object"