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path: root/modules/plugins/languages/typescript.nix
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{
  config,
  pkgs,
  lib,
  ...
}: let
  inherit (lib.options) mkEnableOption mkOption literalExpression;
  inherit (lib.modules) mkIf mkMerge;
  inherit (lib.attrsets) genAttrs;
  inherit (lib.types) enum bool listOf;
  inherit (lib.nvim.lua) toLuaObject;
  inherit (lib.nvim.types) mkGrammarOption mkPluginSetupOption;
  inherit (lib.nvim.dag) entryAnywhere;

  cfg = config.vim.languages.typescript;

  defaultServers = ["typescript-language-server"];
  servers = [
    "typescript-language-server"
    "deno"
    "typescript-go"
    "emmet-ls"
  ];

  defaultFormat = ["prettier"];
  formats = ["prettier" "biome" "biome-check" "biome-organize-imports" "deno" "astyle" "injected"];

  defaultDiagnosticsProvider = ["eslint_d"];
  diagnosticsProviders = ["eslint_d" "biomejs"];
in {
  options.vim.languages.typescript = {
    enable = mkEnableOption "Typescript/Javascript language support";

    treesitter = {
      enable =
        mkEnableOption "Typescript/Javascript treesitter"
        // {
          default = config.vim.languages.enableTreesitter;
          defaultText = literalExpression "config.vim.languages.enableTreesitter";
        };
      tsPackage = mkGrammarOption pkgs "typescript";
      jsPackage = mkGrammarOption pkgs "javascript";
    };

    lsp = {
      enable =
        mkEnableOption "Typescript/Javascript LSP support"
        // {
          default = config.vim.lsp.enable;
          defaultText = literalExpression "config.vim.lsp.enable";
        };

      servers = mkOption {
        type = listOf (enum servers);
        default = defaultServers;
        description = "Typescript/Javascript LSP server to use";
      };
    };

    format = {
      enable =
        mkEnableOption "Typescript/Javascript formatting"
        // {
          default = config.vim.languages.enableFormat;
          defaultText = literalExpression "config.vim.languages.enableFormat";
        };

      type = mkOption {
        description = "Typescript/Javascript formatter to use";
        type = listOf (enum formats);
        default = defaultFormat;
      };
    };

    extraDiagnostics = {
      enable =
        mkEnableOption "extra Typescript/Javascript diagnostics"
        // {
          default = config.vim.languages.enableExtraDiagnostics;
          defaultText = literalExpression "config.vim.languages.enableExtraDiagnostics";
        };

      types = mkOption {
        type = listOf (enum diagnosticsProviders);
        default = defaultDiagnosticsProvider;
        description = "extra Typescript/Javascript diagnostics providers";
      };
    };

    extensions = {
      ts-error-translator = {
        enable = mkEnableOption ''
          [ts-error-translator.nvim]: https://github.com/dmmulroy/ts-error-translator.nvim

          Typescript error translation with [ts-error-translator.nvim]

        '';

        setupOpts = mkPluginSetupOption "ts-error-translator" {
          # This is the default configuration behaviour.
          auto_attach = mkOption {
            description = "Automatically override the publish_diagnostics handler";
            type = bool;
            default = true;
          };
        };
      };
    };
  };

  config = mkIf cfg.enable (mkMerge [
    (mkIf cfg.treesitter.enable {
      vim.treesitter.enable = true;
      vim.treesitter.grammars = [
        cfg.treesitter.tsPackage
        cfg.treesitter.jsPackage
      ];
    })

    (mkIf cfg.lsp.enable {
      vim.lsp = {
        presets = genAttrs cfg.lsp.servers (_: {enable = true;});
        servers = genAttrs cfg.lsp.servers (_: {
          filetypes = [
            "typescript"
            # TODO: move to a JavaScript module
            "javascript"
          ];
        });
      };
    })

    (mkIf cfg.format.enable {
      vim.formatter.conform-nvim = {
        enable = true;
        presets = genAttrs cfg.format.type (_: {enable = true;});
        setupOpts.formatters_by_ft = {
          typescript = cfg.format.type;
          javascript = cfg.format.type;
        };
      };
    })

    (mkIf cfg.extraDiagnostics.enable {
      vim.diagnostics = {
        presets = genAttrs cfg.extraDiagnostics.types (_: {enable = true;});
        nvim-lint = {
          enable = true;
          linters_by_ft = {
            typescript = cfg.extraDiagnostics.types;
          };
        };
      };
    })

    # Extensions
    (mkIf cfg.extensions."ts-error-translator".enable {
      vim.startPlugins = ["ts-error-translator-nvim"];
      vim.pluginRC.ts-error-translator = entryAnywhere ''
        require("ts-error-translator").setup(${toLuaObject cfg.extensions.ts-error-translator.setupOpts})
      '';
    })
  ]);
}