From 35714ccbb7b64f28ba38d67dca9cfdffde2d21f3 Mon Sep 17 00:00:00 2001
From: Andrea Rossato <andrea.rossato@ing.unitn.it>
Date: Tue, 9 Feb 2010 11:41:07 +0100
Subject: Batt: use sysfs to retrieve information

Ignore-this: 06b7e637c2898c3abcc0959a077b8e418c0c15d4

darcs-hash:20100209104107-d6583-4cbd13d8e7194ce28831e2a106e0bd7078481f63.gz
---
 Plugins/Monitors/Batt.hs | 45 ++++++++++++++++++++++-----------------------
 1 file changed, 22 insertions(+), 23 deletions(-)

diff --git a/Plugins/Monitors/Batt.hs b/Plugins/Monitors/Batt.hs
index 78d9eae..93fddf9 100644
--- a/Plugins/Monitors/Batt.hs
+++ b/Plugins/Monitors/Batt.hs
@@ -18,37 +18,36 @@ import qualified Data.ByteString.Lazy.Char8 as B
 import Plugins.Monitors.Common
 import System.Posix.Files (fileExist)
 
-data Batt = Batt Float
+data Batt = Batt Float String
           | NA
 
 battConfig :: IO MConfig
 battConfig = mkMConfig
        "Batt: <left>" -- template
-       ["left"]       -- available replacements
+       ["left","status"] -- available replacements
 
-file2batfile :: String -> (String, String)
-file2batfile s = ("/proc/acpi/battery/"++ s ++ "/info", "/proc/acpi/battery/"++ s ++ "/state")
+file2batfile :: String -> (String, String, String)
+file2batfile s = ( s' ++ "/charge_full"
+                 , s' ++ "/charge_now"
+                 , s' ++ "/status")
+    where s' = "/sys/class/power_supply/" ++ s
 
-readFileBatt :: (String, String) -> IO (B.ByteString, B.ByteString)
-readFileBatt (i,s) =
-    do a <- rf i
-       b <- rf s
-       return (a,b)
+readFileBatt :: (String, String, String) -> IO (String, String, String)
+readFileBatt (f,n,s) =
+    do a <- rf f
+       b <- rf n
+       c <- rf s
+       return (a,b,c)
     where rf file = do
-            f <- fileExist file
-            if f then catRead file else return B.empty
+            fe <- fileExist file
+            if fe then B.unpack `fmap` catRead file else return []
 
-parseBATT :: [(String, String)] -> IO Batt
+parseBATT :: [(String, String, String)] -> IO Batt
 parseBATT bfs =
-    do [(a0,b0),(a1,b1),(a2,b2)] <- mapM readFileBatt (take 3 $ bfs ++ repeat ("",""))
-       let sp p s = case stringParser p s of
-                      [] -> 0
-                      x -> read x
-           (f0, p0) = (sp (3,2) a0, sp (2,4) b0)
-           (f1, p1) = (sp (3,2) a1, sp (2,4) b1)
-           (f2, p2) = (sp (3,2) a2, sp (2,4) b2)
-           left = (p0 + p1 + p2) / (f0 + f1 + f2) --present / full
-       return $ if isNaN left then NA else Batt left
+    do [(a0,b0,c0),(a1,b1,_),(a2,b2,_)] <- mapM readFileBatt (take 3 $ bfs ++ repeat ("","",""))
+       let read' s = if s == [] then 0 else read s
+           left    = (read' b0 + read' b1 + read' b2) / (read' a0 + read' a1 + read' a2) --present / full
+       return $ if isNaN left then NA else Batt left c0
 
 formatBatt :: Float -> Monitor [String]
 formatBatt x =
@@ -63,6 +62,6 @@ runBatt' :: [String] -> [String] -> Monitor String
 runBatt' bfs _ = do
   c <- io $ parseBATT (map file2batfile bfs)
   case c of
-    Batt x -> do l <- formatBatt x
-                 parseTemplate l
+    Batt x s -> do l <- formatBatt x
+                   parseTemplate (l ++ [s])
     NA -> return "N/A"
-- 
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