From 79eb0216f15e1a8570cfae7ae5ed83da74ca30b8 Mon Sep 17 00:00:00 2001
From: Hendrik Jaeger <henk@frustcomp>
Date: Tue, 31 Dec 2013 15:07:08 +0100
Subject: [PATCH] On branch master Changes to be committed:       modified:  
 diddohs.hs         CHANGE:     use ZonedTime and UTCTime instead of DateTime

---
 diddohs.hs | 62 +++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 47 insertions(+), 15 deletions(-)

diff --git a/diddohs.hs b/diddohs.hs
index f54ec2d..d2a796b 100644
--- a/diddohs.hs
+++ b/diddohs.hs
@@ -5,43 +5,75 @@ import Data.List( zipWith4, transpose )
 import Data.Maybe( fromJust, fromMaybe )
 import Data.Monoid( mempty )
 import Data.Time.Clock( secondsToDiffTime )
-import Options.Applicative( execParser, info, strOption, long )
-import System.Environment( getArgs )
-import HMSTime( HMSTime(..), secondsToHMS )
+import Data.Time.Format( parseTime, formatTime )
+import Data.Time.LocalTime( LocalTime(..), ZonedTime(..), zonedTimeToUTC, midnight, localDay )
 import Diddo.Entry( DiddoEntry(..) )
+import HMSTime( HMSTime(..), secondsToHMS )
+import Options.Applicative( execParser, info, strOption, long, help, helper, briefDesc, fullDesc, progDesc, header, (<>) )
+import System.Environment( getArgs )
+import System.Locale
 
 data DiddoOpts = DiddoOpts
   { inDateFmt :: String
   , inFile :: String
   }
 
-calculateDeltas :: [DateTime] -> [Integer]
-calculateDeltas dateTimes = zipWith diffSeconds dateTimes ((startOfDay $ head dateTimes) : init dateTimes)
+parseToZonedTime :: String -> String -> ZonedTime
+parseToZonedTime format = fromMaybe (error "Input data broken.") . parseTime defaultTimeLocale format
 
-parseDateTimeFormat :: String -> String -> DateTime
-parseDateTimeFormat format = fromMaybe (error "Input data broken.") . parseDateTime format
+parseISOsecondsTime :: String -> ZonedTime
+parseISOsecondsTime = parseToZonedTime $ iso8601DateFormat $ Just "%T%z"
 
-startOfDay :: DateTime -> DateTime
-startOfDay = fromJust . parseDateTime "%x" . formatDateTime "%x"
+parseRFC822Time :: String -> ZonedTime
+parseRFC822Time = parseToZonedTime rfc822DateFormat
+
+formatZonedTime :: String -> ZonedTime -> String
+formatZonedTime format = formatTime defaultTimeLocale format
+
+zonedTimesDeltas :: ZonedTime -> [ZonedTime] -> [Integer]
+zonedTimesDeltas startTime timestamps =
+  let
+    startTimeUTC        = zonedTimeToUTC startTime
+    relevantTimestamps  = dropWhile (< startTimeUTC) $ map zonedTimeToUTC timestamps
+  in
+    zipWith diffSeconds relevantTimestamps $ startTimeUTC : init relevantTimestamps
+
+startOfZonedDay :: ZonedTime -> ZonedTime
+startOfZonedDay time = ZonedTime (LocalTime day midnight) $ zonedTimeZone time
+  where
+    day = localDay $ zonedTimeToLocalTime time
 
 mainWithOpts :: DiddoOpts -> IO ()
 mainWithOpts opts =
   do
-    [ timeStrings
-      , entries
+    [
+      timeStamps
+      , entryText
       ]                     <- transpose . map (splitOn ";") . lines <$> readFile (inFile opts)
 
     let
-      deltasHMS             = map secondsToHMS $ calculateDeltas $ map (parseDateTimeFormat (inDateFmt opts)) timeStrings
-      diddos_summarized     = zipWith4 DiddoEntry ("" : init timeStrings) timeStrings deltasHMS entries
+      parseCustomTime       = parseToZonedTime $ inDateFmt opts
+--      parsedTimes           = map (parseToZonedTime $ inDateFmt opts) timeStamps
+      parsedTimes           = map parseCustomTime timeStamps
+      deltasHMS             = map secondsToHMS $ zonedTimesDeltas (startOfZonedDay $ head parsedTimes) parsedTimes
+      diddos_summarized     = zipWith4 DiddoEntry
+                                ((formatZonedTime (inDateFmt opts) $ startOfZonedDay $ head parsedTimes) : init timeStamps)
+                                timeStamps deltasHMS entryText
 
     mapM_ print diddos_summarized
 
 main :: IO ()
 main = execParser opts >>= mainWithOpts
   where
-    opts = info parser mempty
+    opts = info (helper <*> parser)
+      ( header "diddohs - A Time/Task Tracker"
+     <> progDesc "Diddoh Desc"
+--     <> briefDesc
+     <> fullDesc
+     )
     parser = DiddoOpts
-      <$> strOption ( long "indateform" )
+      <$> strOption ( long "indateform"
+                   <> help "Input date format, see date(1)"
+                   )
       <*> strOption ( long "infile" )
 
-- 
2.39.2