content: -- This file is part of purebred
  -- Copyright (C) 2021 Fraser Tweedale
  --
  -- purebred is free software: you can redistribute it and/or modify
  -- it under the terms of the GNU Affero General Public License as published by
  -- the Free Software Foundation, either version 3 of the License, or
  -- (at your option) any later version.
  --
  -- This program is distributed in the hope that it will be useful,
  -- but WITHOUT ANY WARRANTY; without even the implied warranty of
  -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  -- GNU Affero General Public License for more details.
  --
  -- You should have received a copy of the GNU Affero General Public License
  -- along with this program.  If not, see <http://www.gnu.org/licenses/>.
  
  {-# LANGUAGE OverloadedStrings #-}
  
  {-| Add a User-Agent header to outgoing messages. -}
  module Purebred.Plugin.UserAgent (plugin) where
  
  import Control.Lens (set, view)
  
  import Data.MIME (headerText)
  
  import Purebred.Plugin
  import Purebred.Version (version, userAgent)
  import Purebred.Types
  
  plugin :: Plugin (PreSendHook CanReadConfig)
  plugin = Plugin "UserAgent" version (PreSendHook hook)
    where
    hook msg = do
      charsets <- view confCharsets
      pure $ set (headerText charsets "User-Agent") (Just userAgent) msg
  