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type head_data = { page_title : string }

type body_data = {
  title : string;
  subtitle : string;
  topnav : Dream_html.node;
  content : Dream_html.node list;
}

module Layout = struct
  open Dream_html
  open HTML

  let header title subtitle =
    null [ h1 [] [ txt "%s" title ]; h2 [] [ txt "%s" subtitle ] ]

  let footer =
    let today = Unix.localtime (Unix.time ()) in
    let year = string_of_int (today.Unix.tm_year + 1900) in
    let footer_text = Printf.sprintf "Copyright %s %s" year Config.author in
    footer [] [ txt "%s" footer_text ]

  let default_head_data = { page_title = "Ogit" }

  let application ?(head_data = default_head_data) body_data =
    html []
      [
        head []
          [
            title [] "%s" head_data.page_title;
            link [ rel "stylesheet"; href "/static/styles.css" ];
            link
              [ rel "icon"; type_ "image/x-icon"; href "/static/git_icon.svg" ];
          ];
        body []
          [
            header body_data.title body_data.subtitle;
            body_data.topnav;
            div [ id "main" ] body_data.content;
            footer;
          ];
      ]
end

module Topnav = struct
  open Dream_html
  open HTML

  let repo repo_path current_path =
    let li_of_a (path, text) =
      let is_active = path = current_path in
      let attrs = if is_active then [ id "active" ] else [] in
      let url =
        if String.equal path "/" then Printf.sprintf "/%s/" repo_path
        else Printf.sprintf "/%s/%s" repo_path path
      in
      li attrs [ a [ href "%s" url ] [ txt text ] ]
    in
    nav
      [ id "top" ]
      [
        ul []
        @@ List.map li_of_a
             [
               ("/", "summary");
               ("refs", "refs");
               ("log", "log");
               ("tree", "tree");
               ("commit", "commit");
               ("diff", "diff");
             ];
      ]
end

module Ogit_root = struct
  open Dream_html
  open HTML

  let repositories_in directory =
    try
      let repos =
        Sys.readdir directory |> Array.to_list |> List.sort String.compare
      in
      let li_of_repo repo = li [] [ a [ href "%s" repo ] [ txt "%s" repo ] ] in
      div [ id "repositories" ] [ ul [] @@ List.map li_of_repo repos ]
    with Sys_error _ ->
      div [] [ txt "Error: Unable to read repository list." ]

  let body_data =
    {
      title = "Ogit";
      subtitle = "Repositories for " ^ Config.author;
      topnav = null [];
      content = [ repositories_in Config.git_directory ];
    }

  let render () = Layout.application body_data
end

module Repo_root = struct
  open Dream_html
  open HTML

  let branches =
    let repo_path = Fpath.v "/home/blendux/git.test/ogit.git/" in
    let load_repo () = Git_unix.Store.v ~dotgit:repo_path repo_path in
    let store = Lwt_main.run @@ load_repo () in
    let refs = Lwt_main.run @@ Git_unix.Store.Ref.list @@ Result.get_ok store in
    refs |> List.map fst |> List.map Git.Reference.to_string

  let render repo_path =
    let title = repo_path in
    let subtitle = Filename.concat Config.git_directory repo_path in
    let li_of_branch hash = li [] [ txt "%s" hash ] in
    let recent_commits = Git_unhelpers.get_latest_commits repo_path 10 in
    let li_of_commit commit =
      li [] [ a [ href "%s" commit ] [ txt "%s" commit ] ]
    in
    let content =
      [
        h3 [] [ txt "Branches" ];
        ul [] (List.map li_of_branch branches);
        h3 [] [ txt "Recent commits" ];
        ul [] (List.map li_of_commit recent_commits);
      ]
    in
    let body_data =
      { title; subtitle; topnav = Topnav.repo repo_path ""; content }
    in
    Layout.application body_data
end

module Repo_tree = struct
  open Dream_html
  open HTML

  let full_path repo_name dir_path =
    Filename.concat (Filename.concat Config.git_directory repo_name) dir_path

  (* Helper function to list contents of a given directory *)
  let ls_dir repo_name dir_path =
    let dir_full_path = full_path repo_name dir_path in
    try
      Sys.readdir dir_full_path |> Array.to_list
      |> List.filter (fun name -> name <> ".git") (* Exclude .git *)
      |> List.map (fun entry ->
             let entry_rel_path = Filename.concat dir_path entry in
             let full_entry_path = Filename.concat dir_full_path entry in
             (entry, entry_rel_path, Sys.is_directory full_entry_path))
      |> List.sort (fun (a, _, is_dir_a) (b, _, is_dir_b) ->
             match (is_dir_a, is_dir_b) with
             | true, false -> -1 (* Directories first *)
             | false, true -> 1
             | _ -> String.compare a b)
    with Sys_error _ -> []

  (* Function to create a link based on file type *)
  let link_for_entry repo_name (entry, entry_rel_path, is_dir) =
    let link =
      if is_dir then Printf.sprintf "/%s/tree?path=%s" repo_name entry_rel_path
      else Printf.sprintf "/%s/blob?path=%s" repo_name entry_rel_path
    in
    let display_name = if is_dir then entry ^ "/" else entry in
    li [] [ a [ href "%s" link ] [ txt "%s" display_name ] ]

  (* Render function *)
  let render repo_name dir_path =
    let title = repo_name in
    let subtitle = "Files" in

    let repo_entries = ls_dir repo_name @@ dir_path in
    let content =
      [
        txt "%s" dir_path;
        ul [] (List.map (link_for_entry repo_name) repo_entries);
      ]
    in

    let body_data =
      { title; subtitle; topnav = Topnav.repo repo_name "tree"; content }
    in
    Layout.application body_data
end

module Repo_blob = struct
  open Dream_html
  open HTML

  let full_path repo_path = Filename.concat Config.git_directory repo_path

  (* Read the contents of a file *)
  let read_blob repo_path blob_name =
    let file_path = Filename.concat (full_path repo_path) blob_name in
    try Some (In_channel.with_open_text file_path In_channel.input_all)
    with _ ->
      None (* Handle cases where the file doesn't exist or can't be read *)

  (* Render function *)
  let render repo_path blob_name =
    let title = blob_name in
    let subtitle = "File Contents" in

    match read_blob repo_path blob_name with
    | Some content ->
        let content_display = pre [] [ code [] [ txt "%s" content ] ] in
        let body_data =
          {
            title;
            subtitle;
            topnav = Topnav.repo repo_path "blob";
            content = [ content_display ];
          }
        in
        Layout.application body_data
    | None ->
        let error_message = p [] [ txt "Error: Unable to read file." ] in
        let body_data =
          {
            title;
            subtitle;
            topnav = Topnav.repo repo_path "blob";
            content = [ error_message ];
          }
        in
        Layout.application body_data
end
Copyright 2019--2025 Marius PETER