From a8653d8712c2d218adf3f70cef7e511060bed695 Mon Sep 17 00:00:00 2001
From: Andrea Rossato <andrea.rossato@ing.unitn.it>
Date: Wed, 18 Jul 2007 17:12:11 +0200
Subject: Monitors are now a Plugin that can be removed from Config.hs
darcs-hash:20070718151211-d6583-7e0e49c22d07feda72d03370fd592c196dfcc9c1.gz
---
Plugins/Monitors/Batt.hs | 67 +++++++++++
Plugins/Monitors/Common.hs | 286 ++++++++++++++++++++++++++++++++++++++++++++
Plugins/Monitors/Cpu.hs | 53 ++++++++
Plugins/Monitors/Mem.hs | 47 ++++++++
Plugins/Monitors/Net.hs | 99 +++++++++++++++
Plugins/Monitors/Swap.hs | 50 ++++++++
Plugins/Monitors/Weather.hs | 129 ++++++++++++++++++++
7 files changed, 731 insertions(+)
create mode 100644 Plugins/Monitors/Batt.hs
create mode 100644 Plugins/Monitors/Common.hs
create mode 100644 Plugins/Monitors/Cpu.hs
create mode 100644 Plugins/Monitors/Mem.hs
create mode 100644 Plugins/Monitors/Net.hs
create mode 100644 Plugins/Monitors/Swap.hs
create mode 100644 Plugins/Monitors/Weather.hs
(limited to 'Plugins')
diff --git a/Plugins/Monitors/Batt.hs b/Plugins/Monitors/Batt.hs
new file mode 100644
index 0000000..79c0015
--- /dev/null
+++ b/Plugins/Monitors/Batt.hs
@@ -0,0 +1,67 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.Monitors.Batt
+-- Copyright : (c) Andrea Rossato
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A battery monitor for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module Plugins.Monitors.Batt where
+
+import qualified Data.ByteString.Lazy.Char8 as B
+import System.Posix.Files
+
+import Plugins.Monitors.Common
+
+battConfig :: IO MConfig
+battConfig = mkMConfig
+ "Batt: <left>" -- template
+ ["left"] -- available replacements
+
+fileB1 :: (String, String)
+fileB1 = ("/proc/acpi/battery/BAT1/info", "/proc/acpi/battery/BAT1/state")
+
+fileB2 :: (String, String)
+fileB2 = ("/proc/acpi/battery/BAT2/info", "/proc/acpi/battery/BAT2/state")
+
+checkFileBatt :: (String, String) -> IO Bool
+checkFileBatt (i,_) =
+ fileExist i
+
+readFileBatt :: (String, String) -> IO (B.ByteString, B.ByteString)
+readFileBatt (i,s) =
+ do a <- B.readFile i
+ b <- B.readFile s
+ return (a,b)
+
+parseBATT :: IO Float
+parseBATT =
+ do (a1,b1) <- readFileBatt fileB1
+ c <- checkFileBatt fileB2
+ let sp p s = read $ stringParser p s
+ (fu, pr) = (sp (3,2) a1, sp (2,4) b1)
+ case c of
+ True -> do (a2,b2) <- readFileBatt fileB1
+ let full = fu + (sp (3,2) a2)
+ present = pr + (sp (2,4) b2)
+ return $ present / full
+ _ -> return $ pr / fu
+
+
+formatBatt :: Float -> Monitor [String]
+formatBatt x =
+ do let f s = floatToPercent (s / 100)
+ l <- showWithColors f (x * 100)
+ return [l]
+
+runBatt :: [String] -> Monitor String
+runBatt _ =
+ do c <- io $ parseBATT
+ l <- formatBatt c
+ parseTemplate l
diff --git a/Plugins/Monitors/Common.hs b/Plugins/Monitors/Common.hs
new file mode 100644
index 0000000..26b6289
--- /dev/null
+++ b/Plugins/Monitors/Common.hs
@@ -0,0 +1,286 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.Monitors.Common
+-- Copyright : (c) Andrea Rossato
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- Utilities for creating monitors for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module Plugins.Monitors.Common (
+ -- * Monitors
+ -- $monitor
+ Monitor
+ , MConfig (..)
+ , Opts (..)
+ , setConfigValue
+ , getConfigValue
+ , mkMConfig
+ , runM
+ , io
+ -- * Parsers
+ -- $parsers
+ , runP
+ , skipRestOfLine
+ , getNumbers
+ , getNumbersAsString
+ , getAllBut
+ , getAfterString
+ , skipTillString
+ , parseTemplate
+ -- ** String Manipulation
+ -- $strings
+ , showWithColors
+ , takeDigits
+ , floatToPercent
+ , stringParser
+ -- * Threaded Actions
+ -- $thread
+ , doActionTwiceWithDelay
+ ) where
+
+
+import Control.Concurrent
+import Control.Monad.Reader
+
+import qualified Data.ByteString.Lazy.Char8 as B
+import Data.IORef
+import qualified Data.Map as Map
+
+import Numeric
+
+import Text.ParserCombinators.Parsec
+
+import System.Console.GetOpt
+
+-- $monitor
+
+type Monitor a = ReaderT MConfig IO a
+
+data MConfig =
+ MC { normalColor :: IORef (Maybe String)
+ , low :: IORef Int
+ , lowColor :: IORef (Maybe String)
+ , high :: IORef Int
+ , highColor :: IORef (Maybe String)
+ , template :: IORef String
+ , export :: IORef [String]
+ }
+
+-- | from 'http:\/\/www.haskell.org\/hawiki\/MonadState'
+type Selector a = MConfig -> IORef a
+
+sel :: Selector a -> Monitor a
+sel s =
+ do hs <- ask
+ liftIO $ readIORef (s hs)
+
+mods :: Selector a -> (a -> a) -> Monitor ()
+mods s m =
+ do v <- ask
+ io $ modifyIORef (s v) m
+
+setConfigValue :: a -> Selector a -> Monitor ()
+setConfigValue v s =
+ mods s (\_ -> v)
+
+getConfigValue :: Selector a -> Monitor a
+getConfigValue s =
+ sel s
+
+mkMConfig :: String
+ -> [String]
+ -> IO MConfig
+mkMConfig tmpl exprts =
+ do lc <- newIORef Nothing
+ l <- newIORef 33
+ nc <- newIORef Nothing
+ h <- newIORef 66
+ hc <- newIORef Nothing
+ t <- newIORef tmpl
+ e <- newIORef exprts
+ return $ MC nc l lc h hc t e
+
+data Opts = HighColor String
+ | NormalColor String
+ | LowColor String
+ | Low String
+ | High String
+ | Template String
+
+options :: [OptDescr Opts]
+options =
+ [ Option ['H'] ["High"] (ReqArg High "number") "The high threshold"
+ , Option ['L'] ["Low"] (ReqArg Low "number") "The low threshold"
+ , Option ['h'] ["high"] (ReqArg HighColor "color number") "Color for the high threshold: ex \"#FF0000\""
+ , Option ['n'] ["normal"] (ReqArg NormalColor "color number") "Color for the normal threshold: ex \"#00FF00\""
+ , Option ['l'] ["low"] (ReqArg LowColor "color number") "Color for the low threshold: ex \"#0000FF\""
+ , Option ['t'] ["template"] (ReqArg Template "output template") "Output template."
+ ]
+
+doArgs :: [String]
+ -> ([String] -> Monitor String)
+ -> Monitor String
+doArgs args action =
+ do case (getOpt Permute options args) of
+ (o, n, []) -> do doConfigOptions o
+ action n
+ (_, _, errs) -> return (concat errs)
+
+doConfigOptions :: [Opts] -> Monitor ()
+doConfigOptions [] = io $ return ()
+doConfigOptions (o:oo) =
+ do let next = doConfigOptions oo
+ case o of
+ High h -> setConfigValue (read h) high >> next
+ Low l -> setConfigValue (read l) low >> next
+ HighColor hc -> setConfigValue (Just hc) highColor >> next
+ NormalColor nc -> setConfigValue (Just nc) normalColor >> next
+ LowColor lc -> setConfigValue (Just lc) lowColor >> next
+ Template t -> setConfigValue t template >> next
+
+runM :: [String] -> IO MConfig -> ([String] -> Monitor String) -> IO String
+runM args conf action =
+ do c <- conf
+ let ac = doArgs args action
+ runReaderT ac c
+
+io :: IO a -> Monitor a
+io = liftIO
+
+
+
+-- $parsers
+
+runP :: Parser [a] -> String -> IO [a]
+runP p i =
+ do case (parse p "" i) of
+ Left _ -> return []
+ Right x -> return x
+
+getAllBut :: String -> Parser String
+getAllBut s =
+ manyTill (noneOf s) (char $ head s)
+
+getNumbers :: Parser Float
+getNumbers = skipMany space >> many1 digit >>= \n -> return $ read n
+
+getNumbersAsString :: Parser String
+getNumbersAsString = skipMany space >> many1 digit >>= \n -> return n
+
+skipRestOfLine :: Parser Char
+skipRestOfLine =
+ do many $ noneOf "\n\r"
+ newline
+
+getAfterString :: String -> Parser String
+getAfterString s =
+ do { try $ manyTill skipRestOfLine $ string s
+ ; v <- manyTill anyChar $ newline
+ ; return v
+ } <|> return ("<" ++ s ++ " not found!>")
+
+skipTillString :: String -> Parser String
+skipTillString s =
+ manyTill skipRestOfLine $ string s
+
+-- | Parses the output template string
+templateStringParser :: Parser (String,String,String)
+templateStringParser =
+ do{ s <- many $ noneOf "<"
+ ; (_,com,_) <- templateCommandParser
+ ; ss <- many $ noneOf "<"
+ ; return (s, com, ss)
+ }
+
+-- | Parses the command part of the template string
+templateCommandParser :: Parser (String,String,String)
+templateCommandParser =
+ do { char '<'
+ ; com <- many $ noneOf ">"
+ ; char '>'
+ ; return $ ("",com,"")
+ }
+
+-- | Combines the template parsers
+templateParser :: Parser [(String,String,String)]
+templateParser = many templateStringParser --"%")
+
+-- | Takes a list of strings that represent the values of the exported
+-- keys. The strings are joined with the exported keys to form a map
+-- to be combined with 'combine' to the parsed template. Returns the
+-- final output of the monitor.
+parseTemplate :: [String] -> Monitor String
+parseTemplate l =
+ do t <- getConfigValue template
+ s <- io $ runP templateParser t
+ e <- getConfigValue export
+ let m = Map.fromList . zip e $ l
+ return $ combine m s
+
+-- | Given a finite "Map" and a parsed templatet produces the
+-- | resulting output string.
+combine :: Map.Map String String -> [(String, String, String)] -> String
+combine _ [] = []
+combine m ((s,ts,ss):xs) =
+ s ++ str ++ ss ++ combine m xs
+ where str = Map.findWithDefault err ts m
+ err = "<" ++ ts ++ " not found!>"
+
+-- $strings
+
+type Pos = (Int, Int)
+
+takeDigits :: Int -> Float -> Float
+takeDigits d n =
+ fromIntegral ((round (n * fact)) :: Int) / fact
+ where fact = 10 ^ d
+
+floatToPercent :: Float -> String
+floatToPercent n =
+ showFFloat (Just 2) (n*100) "%"
+
+stringParser :: Pos -> B.ByteString -> String
+stringParser (x,y) =
+ flip (!!) x . map B.unpack . B.words . flip (!!) y . B.lines
+
+setColor :: String -> Selector (Maybe String) -> Monitor String
+setColor str s =
+ do a <- getConfigValue s
+ case a of
+ Nothing -> return str
+ Just c -> return $
+ "<fc=" ++ c ++ ">" ++ str ++ "</fc>"
+
+showWithColors :: (Float -> String) -> Float -> Monitor String
+showWithColors f x =
+ do h <- getConfigValue high
+ l <- getConfigValue low
+ let col = setColor $ f x
+ head $ [col highColor | x > fromIntegral h ] ++
+ [col normalColor | x > fromIntegral l ] ++
+ [col lowColor | True]
+
+-- $threads
+
+doActionTwiceWithDelay :: Int -> IO [a] -> IO ([a], [a])
+doActionTwiceWithDelay delay action =
+ do v1 <- newMVar []
+ forkIO $! getData action v1 0
+ v2 <- newMVar []
+ forkIO $! getData action v2 delay
+ threadDelay (delay `div` 3 * 4)
+ a <- readMVar v1
+ b <- readMVar v2
+ return (a,b)
+
+getData :: IO a -> MVar a -> Int -> IO ()
+getData action var d =
+ do threadDelay d
+ s <- action
+ modifyMVar_ var (\_ -> return $! s)
diff --git a/Plugins/Monitors/Cpu.hs b/Plugins/Monitors/Cpu.hs
new file mode 100644
index 0000000..9ab6d8f
--- /dev/null
+++ b/Plugins/Monitors/Cpu.hs
@@ -0,0 +1,53 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.Monitors.Cpu
+-- Copyright : (c) Andrea Rossato
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A cpu monitor for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module Plugins.Monitors.Cpu where
+
+import Plugins.Monitors.Common
+import qualified Data.ByteString.Lazy.Char8 as B
+
+cpuConfig :: IO MConfig
+cpuConfig = mkMConfig
+ "Cpu: <total>" -- template
+ ["total","user","nice","system","idle"] -- available replacements
+
+cpuData :: IO [Float]
+cpuData = do s <- B.readFile "/proc/stat"
+ return $ cpuParser s
+
+cpuParser :: B.ByteString -> [Float]
+cpuParser =
+ map read . map B.unpack . tail . B.words . flip (!!) 0 . B.lines
+
+parseCPU :: IO [Float]
+parseCPU =
+ do (a,b) <- doActionTwiceWithDelay 750000 cpuData
+ let dif = zipWith (-) b a
+ tot = foldr (+) 0 dif
+ percent = map (/ tot) dif
+ return percent
+
+formatCpu :: [Float] -> Monitor [String]
+formatCpu [] = return [""]
+formatCpu x =
+ do let f s = floatToPercent (s / 100)
+ t = foldr (+) 0 $ take 3 x
+ list = t:x
+ mapM (showWithColors f) . map (* 100) $ list
+
+runCpu :: [String] -> Monitor String
+runCpu _ =
+ do c <- io $ parseCPU
+ l <- formatCpu c
+ parseTemplate l
diff --git a/Plugins/Monitors/Mem.hs b/Plugins/Monitors/Mem.hs
new file mode 100644
index 0000000..56639f2
--- /dev/null
+++ b/Plugins/Monitors/Mem.hs
@@ -0,0 +1,47 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.Monitors.Mem
+-- Copyright : (c) Andrea Rossato
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A memory monitor for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module Plugins.Monitors.Mem where
+
+import Plugins.Monitors.Common
+
+memConfig :: IO MConfig
+memConfig = mkMConfig
+ "Mem: <usedratio>% (<cache>M)" -- template
+ ["total", "free", "buffer", -- available replacements
+ "cache", "rest", "used", "usedratio"]
+
+fileMEM :: IO String
+fileMEM = readFile "/proc/meminfo"
+
+parseMEM :: IO [Float]
+parseMEM =
+ do file <- fileMEM
+ let content = map words $ take 4 $ lines file
+ [total, free, buffer, cache] = map (\line -> (read $ line !! 1 :: Float) / 1024) content
+ rest = free + buffer + cache
+ used = total - rest
+ usedratio = used * 100 / total
+ return [total, free, buffer, cache, rest, used, usedratio]
+
+formatMem :: [Float] -> Monitor [String]
+formatMem x =
+ do let f n = show (takeDigits 2 n)
+ mapM (showWithColors f) x
+
+runMem :: [String] -> Monitor String
+runMem _ =
+ do m <- io $ parseMEM
+ l <- formatMem m
+ parseTemplate l
diff --git a/Plugins/Monitors/Net.hs b/Plugins/Monitors/Net.hs
new file mode 100644
index 0000000..8534a2a
--- /dev/null
+++ b/Plugins/Monitors/Net.hs
@@ -0,0 +1,99 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.Monitors.Net
+-- Copyright : (c) Andrea Rossato
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A net device monitor for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module Plugins.Monitors.Net where
+
+import Plugins.Monitors.Common
+import qualified Data.ByteString.Lazy.Char8 as B
+
+data NetDev = NA
+ | ND { netDev :: String
+ , netRx :: Float
+ , netTx :: Float
+ } deriving (Eq,Show,Read)
+
+interval :: Int
+interval = 500000
+
+netConfig :: IO MConfig
+netConfig = mkMConfig
+ "<dev>: <rx>|<tx>" -- template
+ ["dev", "rx", "tx"] -- available replacements
+
+
+-- takes two elements of a list given their indexes
+getTwoElementsAt :: Int -> Int -> [a] -> [a]
+getTwoElementsAt x y xs =
+ z : [zz]
+ where z = xs !! x
+ zz = xs !! y
+
+-- split a list of strings returning a list with: 1. the first part of
+-- the split; 2. the second part of the split without the Char; 3. the
+-- rest of the list. For instance:
+--
+-- > splitAtChar ':' ["lo:31174097","31174097"]
+--
+-- will become ["lo","31174097","31174097"]
+splitAtChar :: Char -> [String] -> [String]
+splitAtChar c xs =
+ first : (rest xs)
+ where rest = map $ \x -> if (c `elem` x) then (tail $ dropWhile (/= c) x) else x
+ first = head $ map (takeWhile (/= c)) . filter (\x -> (c `elem` x)) $ xs
+
+readNetDev :: [String] -> NetDev
+readNetDev [] = NA
+readNetDev xs =
+ ND (xs !! 0) (r (xs !! 1)) (r (xs !! 2))
+ where r s | s == "" = 0
+ | otherwise = (read s) / 1024
+
+fileNET :: IO [NetDev]
+fileNET =
+ do f <- B.readFile "/proc/net/dev"
+ return $ netParser f
+
+netParser :: B.ByteString -> [NetDev]
+netParser =
+ map readNetDev . map (splitAtChar ':') . map (getTwoElementsAt 0 8) . map (words . B.unpack) . drop 2 . B.lines
+
+formatNet :: Float -> Monitor String
+formatNet d =
+ showWithColors f d
+ where f s = show s ++ "Kb"
+
+printNet :: NetDev -> Monitor String
+printNet nd =
+ do case nd of
+ ND d r t -> do rx <- formatNet r
+ tx <- formatNet t
+ parseTemplate [d,rx,tx]
+ NA -> return "N/A"
+
+parseNET :: String -> IO [NetDev]
+parseNET nd =
+ do (a,b) <- doActionTwiceWithDelay interval fileNET
+ let netRate f da db = takeDigits 2 $ ((f db) - (f da)) * fromIntegral (1000000 `div` interval)
+ diffRate (da,db) = ND (netDev da)
+ (netRate netRx da db)
+ (netRate netTx da db)
+ return $ filter (\d -> netDev d == nd) $ map diffRate $ zip a b
+
+runNet :: [String] -> Monitor String
+runNet nd =
+ do pn <- io $ parseNET $ head nd
+ n <- case pn of
+ [x] -> return x
+ _ -> return $ NA
+ printNet n
diff --git a/Plugins/Monitors/Swap.hs b/Plugins/Monitors/Swap.hs
new file mode 100644
index 0000000..fbddaae
--- /dev/null
+++ b/Plugins/Monitors/Swap.hs
@@ -0,0 +1,50 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.Monitors.Swap
+-- Copyright : (c) Andrea Rossato
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A swap usage monitor for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module Plugins.Monitors.Swap where
+
+import Plugins.Monitors.Common
+
+import qualified Data.ByteString.Lazy.Char8 as B
+
+swapConfig :: IO MConfig
+swapConfig = mkMConfig
+ "Swap: <usedratio>" -- template
+ ["total", "used", "free", "usedratio"] -- available replacements
+
+fileMEM :: IO B.ByteString
+fileMEM = B.readFile "/proc/meminfo"
+
+parseMEM :: IO [Float]
+parseMEM =
+ do file <- fileMEM
+ let p x y = flip (/) 1024 . read . stringParser x $ y
+ tot = p (1,11) file
+ free = p (1,12) file
+ return [tot, (tot - free), free, (tot - free) / tot]
+
+formatSwap :: [Float] -> Monitor [String]
+formatSwap x =
+ do let f1 n = show (takeDigits 2 n)
+ f2 n = floatToPercent n
+ (hd, tl) = splitAt 3 x
+ firsts <- mapM (showWithColors f1) hd
+ lasts <- mapM (showWithColors f2) tl
+ return $ firsts ++ lasts
+
+runSwap :: [String] -> Monitor String
+runSwap _ =
+ do m <- io $ parseMEM
+ l <- formatSwap m
+ parseTemplate l
diff --git a/Plugins/Monitors/Weather.hs b/Plugins/Monitors/Weather.hs
new file mode 100644
index 0000000..ec5606e
--- /dev/null
+++ b/Plugins/Monitors/Weather.hs
@@ -0,0 +1,129 @@
+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.Monitors.Weather
+-- Copyright : (c) Andrea Rossato
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Andrea Rossato <andrea.rossato@unibz.it>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A weather monitor for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module Plugins.Monitors.Weather where
+
+import Plugins.Monitors.Common
+
+import System.Process
+import System.Exit
+import System.IO
+
+import Text.ParserCombinators.Parsec
+
+
+weatherConfig :: IO MConfig
+weatherConfig = mkMConfig
+ "<station>: <tempC>C, rh <rh>% (<hour>)" -- template
+ ["station" -- available replacements
+ , "stationState"
+ , "year"
+ , "month"
+ , "day"
+ , "hour"
+ , "wind"
+ , "visibility"
+ , "skyCondition"
+ , "tempC"
+ , "tempF"
+ , "dewPoint"
+ , "rh"
+ ,"pressure"
+ ]
+
+data WeatherInfo =
+ WI { stationPlace :: String
+ , stationState :: String
+ , year :: String
+ , month :: String
+ , day :: String
+ , hour :: String
+ , wind :: String
+ , visibility :: String
+ , skyCondition :: String
+ , temperature :: Float
+ , dewPoint :: String
+ , humidity :: Float
+ , pressure :: String
+ } deriving (Show)
+
+pTime :: Parser (String, String, String, String)
+pTime = do y <- getNumbersAsString
+ char '.'
+ m <- getNumbersAsString
+ char '.'
+ d <- getNumbersAsString
+ char ' '
+ (h:hh:mi:mimi) <- getNumbersAsString
+ char ' '
+ return (y, m, d ,([h]++[hh]++":"++[mi]++mimi))
+
+pTemp :: Parser Float
+pTemp = do manyTill anyChar $ char '('
+ s <- manyTill digit $ (char ' ' <|> char '.')
+ skipRestOfLine
+ return $read s
+
+pRh :: Parser Float
+pRh = do s <- manyTill digit $ (char '%' <|> char '.')
+ return $ read s
+
+parseData :: Parser [WeatherInfo]
+parseData =
+ do st <- getAllBut ","
+ space
+ ss <- getAllBut "("
+ skipRestOfLine >> getAllBut "/"
+ (y,m,d,h) <- pTime
+ w <- getAfterString "Wind: "
+ v <- getAfterString "Visibility: "
+ sk <- getAfterString "Sky conditions: "
+ skipTillString "Temperature: "
+ temp <- pTemp
+ dp <- getAfterString "Dew Point: "
+ skipTillString "Relative Humidity: "
+ rh <- pRh
+ p <- getAfterString "Pressure (altimeter): "
+ manyTill skipRestOfLine eof
+ return $ [WI st ss y m d h w v sk temp dp rh p]
+
+defUrl :: String
+defUrl = "http://weather.noaa.gov/pub/data/observations/metar/decoded/"
+
+getData :: String -> IO String
+getData url=
+ do (i,o,e,p) <- runInteractiveCommand ("curl " ++ defUrl ++ url ++ ".TXT")
+ exit <- waitForProcess p
+ let closeHandles = do hClose o
+ hClose i
+ hClose e
+ case exit of
+ ExitSuccess -> do str <- hGetContents o
+ return str
+ _ -> do closeHandles
+ return "Could not retrieve data"
+
+formatWeather :: [WeatherInfo] -> Monitor String
+formatWeather [(WI st ss y m d h w v sk temp dp r p)] =
+ do cel <- showWithColors show temp
+ far <- showWithColors (show . takeDigits 1) (((9 / 5) * temp) + 32)
+ rh <- showWithColors show r
+ parseTemplate [st, ss, y, m, d, h, w, v, sk, cel, far, dp, rh , p ]
+formatWeather _ = return "N/A"
+
+runWeather :: [String] -> Monitor String
+runWeather str =
+ do d <- io $ getData $ head str
+ i <- io $ runP parseData d
+ formatWeather i
--
cgit v1.2.3