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{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE NoImplicitPrelude #-}
-- | Status of the agent for the UI
module Omni.Agent.Log where
import Alpha
import Data.Aeson ((.:), (.:?))
import qualified Data.Aeson as Aeson
import qualified Data.ByteString.Lazy as BL
import Data.IORef (IORef, modifyIORef', newIORef, readIORef, writeIORef)
import qualified Data.Text as Text
import qualified Data.Text.Encoding as TE
import qualified Data.Text.IO as TIO
import Data.Time.Clock (NominalDiffTime, UTCTime, diffUTCTime, getCurrentTime)
import Data.Time.Format (defaultTimeLocale, parseTimeOrError)
import qualified System.Console.ANSI as ANSI
import qualified System.IO as IO
import System.IO.Unsafe (unsafePerformIO)
import Text.Printf (printf)
-- | Status of the agent for the UI
data Status = Status
{ statusWorker :: Text,
statusTask :: Maybe Text,
statusThread :: Maybe Text,
statusFiles :: Int,
statusCredits :: Double,
statusStartTime :: UTCTime,
statusActivity :: Text
}
deriving (Show, Eq)
emptyStatus :: Text -> UTCTime -> Status
emptyStatus workerName startTime =
Status
{ statusWorker = workerName,
statusTask = Nothing,
statusThread = Nothing,
statusFiles = 0,
statusCredits = 0.0,
statusStartTime = startTime,
statusActivity = "Idle"
}
-- | Global state for the status bar
{-# NOINLINE currentStatus #-}
currentStatus :: IORef Status
currentStatus = unsafePerformIO (newIORef (emptyStatus "Unknown" defaultStartTime))
defaultStartTime :: UTCTime
defaultStartTime = parseTimeOrError True defaultTimeLocale "%Y-%m-%d %H:%M:%S %Z" "2000-01-01 00:00:00 UTC"
-- | Initialize the status bar system
init :: Text -> IO ()
init workerName = do
IO.hSetBuffering IO.stderr IO.LineBuffering
startTime <- getCurrentTime
writeIORef currentStatus (emptyStatus workerName startTime)
-- Reserve 5 lines at bottom
IO.hPutStrLn IO.stderr ""
IO.hPutStrLn IO.stderr ""
IO.hPutStrLn IO.stderr ""
IO.hPutStrLn IO.stderr ""
IO.hPutStrLn IO.stderr ""
ANSI.hCursorUp IO.stderr 5
-- | Update the status
update :: (Status -> Status) -> IO ()
update f = do
modifyIORef' currentStatus f
render
-- | Set the activity message
updateActivity :: Text -> IO ()
updateActivity msg = update (\s -> s {statusActivity = msg})
-- | Log a scrolling message (appears above status bars)
log :: Text -> IO ()
log msg = do
-- Clear status bars
ANSI.hClearLine IO.stderr
ANSI.hCursorDown IO.stderr 1
ANSI.hClearLine IO.stderr
ANSI.hCursorDown IO.stderr 1
ANSI.hClearLine IO.stderr
ANSI.hCursorDown IO.stderr 1
ANSI.hClearLine IO.stderr
ANSI.hCursorDown IO.stderr 1
ANSI.hClearLine IO.stderr
ANSI.hCursorUp IO.stderr 4
-- Print message (scrolls screen)
TIO.hPutStrLn IO.stderr msg
-- Re-render status bars at bottom
-- (Since we scrolled, we are now on the line above where the first status line should be)
render
-- | Render the five status lines
render :: IO ()
render = do
Status {..} <- readIORef currentStatus
now <- getCurrentTime
let taskStr = maybe "None" identity statusTask
threadStr = maybe "None" identity statusThread
elapsed = diffUTCTime now statusStartTime
elapsedStr = formatElapsed elapsed
-- Line 1: Worker | Thread
ANSI.hSetCursorColumn IO.stderr 0
ANSI.hClearLine IO.stderr
TIO.hPutStr IO.stderr ("[Worker: " <> statusWorker <> "] Thread: " <> threadStr)
-- Line 2: Task
ANSI.hCursorDown IO.stderr 1
ANSI.hSetCursorColumn IO.stderr 0
ANSI.hClearLine IO.stderr
TIO.hPutStr IO.stderr ("Task: " <> taskStr)
-- Line 3: Files | Credits
ANSI.hCursorDown IO.stderr 1
ANSI.hSetCursorColumn IO.stderr 0
ANSI.hClearLine IO.stderr
let creditsStr = Text.pack (printf "%.2f" statusCredits)
TIO.hPutStr IO.stderr ("Files: " <> tshow statusFiles <> " | Credits: $" <> creditsStr)
-- Line 4: Time (elapsed duration)
ANSI.hCursorDown IO.stderr 1
ANSI.hSetCursorColumn IO.stderr 0
ANSI.hClearLine IO.stderr
TIO.hPutStr IO.stderr ("Time: " <> elapsedStr)
-- Line 5: Activity
ANSI.hCursorDown IO.stderr 1
ANSI.hSetCursorColumn IO.stderr 0
ANSI.hClearLine IO.stderr
TIO.hPutStr IO.stderr ("> " <> statusActivity)
-- Return cursor to line 1
ANSI.hCursorUp IO.stderr 4
IO.hFlush IO.stderr
-- | Log Entry from JSON
data LogEntry = LogEntry
{ leMessage :: Text,
leThreadId :: Maybe Text,
leCredits :: Maybe Double,
leTotalCredits :: Maybe Double,
leTimestamp :: Maybe Text
}
deriving (Show, Eq)
instance Aeson.FromJSON LogEntry where
parseJSON =
Aeson.withObject "LogEntry" <| \v ->
(LogEntry </ (v .: "message"))
<*> v
.:? "threadId"
<*> v
.:? "credits"
<*> v
.:? "totalCredits"
<*> v
.:? "timestamp"
-- | Parse a log line and update status
processLogLine :: Text -> IO ()
processLogLine line = do
let bs = BL.fromStrict <| TE.encodeUtf8 line
case Aeson.decode bs of
Just entry -> update (updateFromEntry entry)
Nothing -> pure () -- Ignore invalid JSON
updateFromEntry :: LogEntry -> Status -> Status
updateFromEntry LogEntry {..} s =
s
{ statusThread = leThreadId <|> statusThread s,
statusCredits = maybe (statusCredits s) (/ 100.0) leTotalCredits -- Only update if totalCredits is present
}
-- | Format elapsed time as MM:SS or HH:MM:SS
formatElapsed :: NominalDiffTime -> Text
formatElapsed elapsed =
let totalSecs = floor elapsed :: Int
hours = totalSecs `div` 3600
mins = (totalSecs `mod` 3600) `div` 60
secs = totalSecs `mod` 60
in if hours > 0
then Text.pack (printf "%02d:%02d:%02d" hours mins secs)
else Text.pack (printf "%02d:%02d" mins secs)
|
