nix/modules/home-manager/accounts/email/default.nix

{ lib, config, pkgs, ... }:
with lib;
let
  cfg = config.modules.email;
in
{
  options.modules.email = {
    enable = mkEnableOption "Enable email accounts configuration";

    accountConfigs = mkOption {
      type = types.attrsOf types.attrs;
      default = false;
      description = "List of account variables used to create accounts";
    };

    primary = mkOption {
      type = types.str;
      default = false;
      description = "name of primary account";
    };
  };

  config = mkIf cfg.enable {
    accounts.email = let
      defaultSetting = {
        mbsync = {
          enable = true;
          create = "maildir";
          expunge = "both";
        };
        aerc = {
          enable = true;
          extraAccounts ={
            source = "notmuch://~/mail";
            maildir-store = "~/mail";
            default = "Inbox";
            postpone = "Drafts";
            copy-to = "Sent";
            use-envelope-from = true;
          };
        };
        notmuch = {
          enable = true;
        };
      };
      accountsList = lib.mapAttrs ( name: value: lib.recursiveUpdate defaultSetting value.config ) cfg.accountConfigs;
    in {
      maildirBasePath = "mail";
      accounts = lib.recursiveUpdate accountsList { "${cfg.primary}".primary = true; };
    };

    # programs.notmuch = {
    #   enable = true;
    #   new.tags = [ "new" ];
    #   hooks.postNew = ''
    #     ${pkgs.afew}/bin/afew -t -n
    #     ${pkgs.afew}/bin/afew -w -n
    #   '';
    # };

    programs.afew = {
      enable = true;
      extraConfig = ''
        [FolderNameFilter]
        folder_explicit_list = archives
        folder_transforms = archives:archive
        maildir_separator = /
        [MailMover]
        [SpamFilter]
        [KillThreadsFilter]
        [ArchiveSentMailsFilter]
        sent_tag = sent
        [InboxFilter]
      '';
    };
    programs.aerc = {
      enable = true;
      extraConfig = {
        general = {
          unsafe-accounts-conf = true;
        };
        ui = {
          column-subject = ''
            {{if .ThreadPrefix}}{{.Style (printf "%s " .ThreadPrefix) "thread"}}{{- end }}{{.Subject}}
          '';
          column-flags = ''
            {{.Flags | join " "}}
          '';
          index-columns = ''
            flags:5,name<20%,subject,date>=
          '';
          thread-prefix-tip = "╼ ";
          thread-prefix-indent = "";
          thread-prefix-stem = "│";
          thread-prefix-limb = "─";
          thread-prefix-folded = "+";
          thread-prefix-unfolded = "";
          thread-prefix-first-child = "┬";
          thread-prefix-has-siblings = "├";
          thread-prefix-orphan = "┬╼ ";
          thread-prefix-dummy = "┬";
          thread-prefix-lone = " ";
          thread-prefix-last-sibling = "╰";
          completion-popovers = true;
          icon-attachment = "󰁦";
          icon-replied = "";
          icon-forwarded = "";
          icon-new = "";
          icon-old = "";
          icon-unencrypted = "";
          icon-encrypted = "";
          icon-signed = "󰏫";
          icon-signed-encrypted = "";
          icon-invalid = "󰏯";
          icon-unknown = "󰷭";
          threading-enabled = true;
        };
        statusline = {
          status-columns=''
            left<*,right>*
          '';
          column-left = ''
            {{.Style (printf " %s " (toUpper .Account)) "statusline_account" }}\
            {{.Style (printf "  %s | 󰉉 %s " .Folder (humanReadable .Size)) "statusline_folder"}}\
            {{ if .ContentInfo }}{{.Style (printf " %s " .ContentInfo) "statusline_contentinfo"}}{{- end }}
          '';
          column-center = ''
            {{.Style .PendingKeys "statusline_center"}}
          '';
        };
        filters = {
          "text/plain" = " wrap -w 100 | colorize";
          "text/html" = "! html";
          "text/calendar" = "calendar";
          "message/delivery-status" = "colorize";
          "message/rfc822" = "colorize";
          ".headers" = "colorize";
        };
      };
      stylesets = {
        default = (builtins.readFile ./files/default.theme);
      };
    };
    programs.mbsync = {
      enable = true;
    };
    services.mbsync = {
      enable = true;
      postExec = "${pkgs.notmuch}/bin/notmuch new";
      package = config.programs.mbsync.package;
    };
  };
}