mirror of
https://github.com/TheRealOwenRees/chess-scribe-api.git
synced 2026-07-23 01:06:56 +00:00
owenrees
d13033d6d8
* update to latest ocaml/opam release * remove commented out code * update pgn_to_tex version, pinning github tag * update docker container pull from registry script
107 lines
2.8 KiB
OCaml
107 lines
2.8 KiB
OCaml
open Lwt.Syntax
|
|
open Yojson.Safe.Util
|
|
open Pgn_logic
|
|
|
|
let tex_start = "\\begin{document}\\begin{multicols}{2}"
|
|
let tex_end = "\\end{multicols}\\end{document}"
|
|
|
|
let handle_convert request =
|
|
let temp_id =
|
|
Int64.to_string (Int64.of_float (Unix.gettimeofday () *. 1000.0))
|
|
in
|
|
|
|
let temp_dir = Filename.get_temp_dir_name () in
|
|
|
|
let tex_file_path =
|
|
Filename.concat temp_dir (Printf.sprintf "game-%s.tex" temp_id)
|
|
in
|
|
|
|
let pdf_file_path =
|
|
Filename.concat temp_dir (Printf.sprintf "game-%s.pdf" temp_id)
|
|
in
|
|
|
|
let log_file_path =
|
|
Filename.concat temp_dir (Printf.sprintf "game-%s.log" temp_id)
|
|
in
|
|
|
|
let aux_file_path =
|
|
Filename.concat temp_dir (Printf.sprintf "game-%s.aux" temp_id)
|
|
in
|
|
|
|
let cleanup () =
|
|
[ tex_file_path; pdf_file_path; log_file_path; aux_file_path ]
|
|
|> List.iter (fun path -> if Sys.file_exists path then Sys.remove path)
|
|
in
|
|
|
|
let* body = Dream.body request in
|
|
|
|
try
|
|
let json = Yojson.Safe.from_string body in
|
|
|
|
let pgn = json |> member "pgn" |> to_string in
|
|
let diagram_clock = json |> member "diagramClock" |> to_bool in
|
|
let diagrams_json = json |> member "diagrams" in
|
|
|
|
let diagrams_data =
|
|
Yojson.Safe.to_string diagrams_json |> Pgn2tex.parse_diagrams_json
|
|
in
|
|
|
|
let game_tex =
|
|
tex_start
|
|
^ Pgn2tex.to_tex pgn ~diagram_data:diagrams_data ~clock:diagram_clock
|
|
^ tex_end
|
|
in
|
|
|
|
Out_channel.with_open_text tex_file_path (fun oc ->
|
|
Out_channel.output_string oc game_tex);
|
|
|
|
let argv =
|
|
[|
|
|
"pdflatex";
|
|
"-fmt";
|
|
"./preambles/chess";
|
|
"-interaction=nonstopmode";
|
|
Printf.sprintf "-output-directory=%s" temp_dir;
|
|
tex_file_path;
|
|
|]
|
|
in
|
|
|
|
let pid =
|
|
Unix.create_process "pdflatex" argv Unix.stdin Unix.stdout Unix.stderr
|
|
in
|
|
|
|
let _, _ = Unix.waitpid [] pid in
|
|
|
|
if Sys.file_exists pdf_file_path then (
|
|
let pdf_content =
|
|
In_channel.with_open_bin pdf_file_path In_channel.input_all
|
|
in
|
|
|
|
cleanup ();
|
|
|
|
Dream.respond ~status:`Created
|
|
~headers:
|
|
[
|
|
("Content-Disposition", "inline");
|
|
("Content-Type", "application/pdf");
|
|
]
|
|
pdf_content)
|
|
else failwith "PDF generation failed: output file not found on disk"
|
|
with
|
|
| Type_error (msg, _) ->
|
|
cleanup ();
|
|
Dream.json ~status:`Bad_Request
|
|
(Printf.sprintf
|
|
{|{"type": "error", "message": "JSON structure error: %s"}|} msg)
|
|
| Yojson.Json_error msg ->
|
|
cleanup ();
|
|
Dream.json ~status:`Bad_Request
|
|
(Printf.sprintf
|
|
{|{"type": "error", "message": "Invalid JSON syntax: %s"}|} msg)
|
|
| exn ->
|
|
cleanup ();
|
|
let err_msg = Printexc.to_string exn in
|
|
|
|
Dream.json ~status:`Internal_Server_Error
|
|
(Printf.sprintf {|{"type": "error", "message": "%s"}|} err_msg)
|