{-# LANGUAGE CPP #-}

-----------------------------------------------------------------------------
-- |
-- Module      :  Plugins.Monitors.Load
-- Copyright   :  Finn Lawler
-- License     :  BSD-style (see LICENSE)
--
-- Author      :  Finn Lawler <flawler@cs.tcd.ie>
-- Maintainer  :  jao <mail@jao.io>
-- Stability   :  unstable
-- Portability :  unportable
--
-- A load average monitor for Xmobar.  Adapted from
-- Xmobar.Plugins.Monitors.Thermal by Juraj Hercek.
--
-----------------------------------------------------------------------------

module Xmobar.Plugins.Monitors.Load (loadConfig, runLoad) where

import Xmobar.Plugins.Monitors.Common
import Xmobar.Plugins.Monitors.Load.Common (Result(..))

#if defined(freebsd_HOST_OS)
import qualified Xmobar.Plugins.Monitors.Load.FreeBSD as ML
#else
import qualified Xmobar.Plugins.Monitors.Load.Linux as ML
#endif


-- | Default configuration.
loadConfig :: IO MConfig
loadConfig :: IO MConfig
loadConfig = String -> [String] -> IO MConfig
mkMConfig String
"Load: <load1>" [String
"load1", String
"load5", String
"load15"]


-- | Retrieves load information.  Returns the monitor string parsed
-- according to template (either default or user specified).
runLoad :: [String] -> Monitor String
runLoad :: [String] -> Monitor String
runLoad [String]
_ = do
  Result
result <- IO Result -> Monitor Result
forall a. IO a -> Monitor a
io IO Result
ML.fetchLoads
  case Result
result of
    Result [Float]
loads ->
      do
        Int
d <- Selector Int -> Monitor Int
forall a. Selector a -> Monitor a
getConfigValue Selector Int
decDigits
        [String] -> Monitor String
parseTemplate ([String] -> Monitor String)
-> ReaderT MConfig IO [String] -> Monitor String
forall (m :: * -> *) a b. Monad m => (a -> m b) -> m a -> m b
=<< (Float -> Monitor String) -> [Float] -> ReaderT MConfig IO [String]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM ((Float -> String) -> Float -> Monitor String
forall a. (Num a, Ord a) => (a -> String) -> a -> Monitor String
showWithColors (Int -> Float -> String
forall a. RealFloat a => Int -> a -> String
showDigits Int
d)) [Float]
loads
    Result
NA -> Selector String -> Monitor String
forall a. Selector a -> Monitor a
getConfigValue Selector String
naString