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|
-----------------------------------------------------------------------------
-- |
-- Module : Plugins.Monitors.CoreCommon
-- Copyright : (c) Juraj Hercek
-- License : BSD-style (see LICENSE)
--
-- Maintainer : Juraj Hercek <juhe_haskell@hck.sk>
-- Stability : unstable
-- Portability : unportable
--
-- The common part for cpu core monitors (e.g. cpufreq, coretemp)
--
-----------------------------------------------------------------------------
module Plugins.Monitors.CoreCommon where
import Plugins.Monitors.Common
import System.Posix.Files (fileExist)
import System.IO (withFile, IOMode(ReadMode), hGetLine)
import System.Directory
import Data.Char (isDigit)
import Data.List (isPrefixOf)
-- |
-- Function checks the existence of first file specified by pattern and if the
-- file doesn't exists failure message is shown, otherwise the data retrieval
-- is performed.
checkedDataRetrieval :: (Num a, Ord a, Show a) =>
String -> String -> String -> String -> (Double -> a)
-> (a -> String) -> Monitor String
checkedDataRetrieval failureMessage dir file pattern trans fmt = do
exists <- io $ fileExist $ concat [dir, "/", pattern, "0/", file]
case exists of
False -> return failureMessage
True -> retrieveData dir file pattern trans fmt
-- |
-- Function retrieves data from files in directory dir specified by
-- pattern. String values are converted to double and 'trans' applied
-- to each one. Final array is processed by template parser function
-- and returned as monitor string.
retrieveData :: (Num a, Ord a, Show a) =>
String -> String -> String -> (Double -> a) -> (a -> String) ->
Monitor String
retrieveData dir file pattern trans fmt = do
count <- io $ dirCount dir pattern
contents <- io $ mapM getGuts $ files count
values <- mapM (showWithColors fmt) $ map conversion contents
parseTemplate values
where
getGuts f = withFile f ReadMode hGetLine
dirCount path str = getDirectoryContents path
>>= return . length
. filter (\s -> str `isPrefixOf` s
&& isDigit (last s))
files count = map (\i -> concat [dir, "/", pattern, show i, "/", file])
[0 .. count - 1]
conversion = trans . (read :: String -> Double)
|
