{-# LANGUAGE TupleSections #-}
-----------------------------------------------------------------------------
-- |
-- Module      : System.Taffybar.Information.CPU2
-- Copyright   : (c) José A. Romero L.
-- License     : BSD3-style (see LICENSE)
--
-- Maintainer  : José A. Romero L. <escherdragon@gmail.com>
-- Stability   : unstable
-- Portability : unportable
--
-- Provides information about used CPU times, obtained from parsing the
-- @\/proc\/stat@ file using some of the facilities included in the
-- "System.Taffybar.Information.StreamInfo" module.
-- And also provides information about the temperature of cores.
-- (Now supports only physical cpu).
--
-----------------------------------------------------------------------------

module System.Taffybar.Information.CPU2 where

import Control.Monad
import Data.List
import Data.Maybe
import Safe
import System.Directory
import System.FilePath
import System.Taffybar.Information.StreamInfo

-- | Returns a list of 5 to 7 elements containing all the values available for
-- the given core (or all of them aggregated, if "cpu" is passed).
getCPUInfo :: String -> IO [Int]
getCPUInfo :: String -> IO [Int]
getCPUInfo = String -> (String -> [(String, [Int])]) -> String -> IO [Int]
forall a. String -> (String -> [(String, [a])]) -> String -> IO [a]
getParsedInfo String
"/proc/stat" String -> [(String, [Int])]
parse

parse :: String -> [(String, [Int])]
parse :: String -> [(String, [Int])]
parse = (String -> Maybe (String, [Int])) -> [String] -> [(String, [Int])]
forall a b. (a -> Maybe b) -> [a] -> [b]
mapMaybe ([String] -> Maybe (String, [Int])
tuplize ([String] -> Maybe (String, [Int]))
-> (String -> [String]) -> String -> Maybe (String, [Int])
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> [String]
words) ([String] -> [(String, [Int])])
-> (String -> [String]) -> String -> [(String, [Int])]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (String -> Bool) -> [String] -> [String]
forall a. (a -> Bool) -> [a] -> [a]
filter (\String
x -> Int -> String -> String
forall a. Int -> [a] -> [a]
take Int
3 String
x String -> String -> Bool
forall a. Eq a => a -> a -> Bool
== String
"cpu") ([String] -> [String])
-> (String -> [String]) -> String -> [String]
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> [String]
lines

tuplize :: [String] -> Maybe (String, [Int])
tuplize :: [String] -> Maybe (String, [Int])
tuplize [String]
s = do
  String
cpu <- [String]
s [String] -> Int -> Maybe String
forall a. [a] -> Int -> Maybe a
`atMay` Int
0
  (String, [Int]) -> Maybe (String, [Int])
forall (m :: * -> *) a. Monad m => a -> m a
return (String
cpu, (String -> Int) -> [String] -> [Int]
forall a b. (a -> b) -> [a] -> [b]
map (Int -> String -> Int
forall a. Read a => a -> String -> a
readDef (-Int
1)) ([String] -> [String]
forall a. [a] -> [a]
tailSafe [String]
s))

-- | Returns a two-element list containing relative system and user times
-- calculated using two almost simultaneous samples of the @\/proc\/stat@ file
-- for the given core (or all of them aggregated, if \"cpu\" is passed).
getCPULoad :: String -> IO [Double]
getCPULoad :: String -> IO [Double]
getCPULoad String
cpu = do
  [Double]
load <- Double -> IO [Int] -> IO [Double]
forall a b. (Integral a, RealFloat b) => b -> IO [a] -> IO [b]
getLoad Double
0.05 (IO [Int] -> IO [Double]) -> IO [Int] -> IO [Double]
forall a b. (a -> b) -> a -> b
$ String -> IO [Int]
getCPUInfo String
cpu
  case [Double]
load of
    Double
l0:Double
l1:Double
l2:[Double]
_ -> [Double] -> IO [Double]
forall (m :: * -> *) a. Monad m => a -> m a
return [ Double
l0 Double -> Double -> Double
forall a. Num a => a -> a -> a
+ Double
l1, Double
l2 ]
    [Double]
_ -> [Double] -> IO [Double]
forall (m :: * -> *) a. Monad m => a -> m a
return []

-- | Get the directory in which core temperature files are kept.
getCPUTemperatureDirectory :: IO FilePath
getCPUTemperatureDirectory :: IO String
getCPUTemperatureDirectory =
  (String
baseDir String -> String -> String
</>) (String -> String) -> ([String] -> String) -> [String] -> String
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> Maybe String -> String
forall a. a -> Maybe a -> a
fromMaybe String
"hwmon0" (Maybe String -> String)
-> ([String] -> Maybe String) -> [String] -> String
forall b c a. (b -> c) -> (a -> b) -> a -> c
.
  (String -> Bool) -> [String] -> Maybe String
forall (t :: * -> *) a. Foldable t => (a -> Bool) -> t a -> Maybe a
find (String -> String -> Bool
forall a. Eq a => [a] -> [a] -> Bool
isPrefixOf String
"hwmon")
  ([String] -> String) -> IO [String] -> IO String
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> String -> IO [String]
listDirectory String
baseDir
  where baseDir :: String
baseDir =
          String
"/"  String -> String -> String
</> String
"sys" String -> String -> String
</> String
"bus" String -> String -> String
</> String
"platform" String -> String -> String
</>
          String
"devices" String -> String -> String
</> String
"coretemp.0" String -> String -> String
</> String
"hwmon"

readCPUTempFile :: FilePath -> IO Double
readCPUTempFile :: String -> IO Double
readCPUTempFile String
cpuTempFilePath = (Double -> Double -> Double
forall a. Fractional a => a -> a -> a
/ Double
1000) (Double -> Double) -> (String -> Double) -> String -> Double
forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> Double
forall a. Read a => String -> a
read (String -> Double) -> IO String -> IO Double
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> String -> IO String
readFile String
cpuTempFilePath

getAllTemperatureFiles :: FilePath -> IO [FilePath]
getAllTemperatureFiles :: String -> IO [String]
getAllTemperatureFiles String
temperaturesDirectory =
  (String -> Bool) -> [String] -> [String]
forall a. (a -> Bool) -> [a] -> [a]
filter ((Bool -> Bool -> Bool)
-> (String -> Bool) -> (String -> Bool) -> String -> Bool
forall (m :: * -> *) a1 a2 r.
Monad m =>
(a1 -> a2 -> r) -> m a1 -> m a2 -> m r
liftM2 Bool -> Bool -> Bool
(&&) (String -> String -> Bool
forall a. Eq a => [a] -> [a] -> Bool
isPrefixOf String
"temp") (String -> String -> Bool
forall a. Eq a => [a] -> [a] -> Bool
isSuffixOf String
"input")) ([String] -> [String]) -> IO [String] -> IO [String]
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$>
         String -> IO [String]
listDirectory String
temperaturesDirectory

getCPUTemperatures :: IO [(String, Double)]
getCPUTemperatures :: IO [(String, Double)]
getCPUTemperatures = do
  String
dir <- IO String
getCPUTemperatureDirectory
  let mkPair :: String -> IO (String, Double)
mkPair String
filename = (String
filename,) (Double -> (String, Double)) -> IO Double -> IO (String, Double)
forall (f :: * -> *) a b. Functor f => (a -> b) -> f a -> f b
<$> String -> IO Double
readCPUTempFile (String
dir String -> String -> String
</> String
filename)
  String -> IO [String]
getAllTemperatureFiles String
dir IO [String]
-> ([String] -> IO [(String, Double)]) -> IO [(String, Double)]
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= (String -> IO (String, Double))
-> [String] -> IO [(String, Double)]
forall (t :: * -> *) (m :: * -> *) a b.
(Traversable t, Monad m) =>
(a -> m b) -> t a -> m (t b)
mapM String -> IO (String, Double)
mkPair