-- Copyright (c) 2019 The DAML Authors. All rights reserved.
-- SPDX-License-Identifier: Apache-2.0

{-# LANGUAGE RankNTypes #-}
-- | This is a compatibility module that abstracts over the
-- concrete choice of logging framework so users can plug in whatever
-- framework they want to.
module Development.IDE.Types.Logger
  ( Priority(..)
  , Logger(..)
  , logError, logWarning, logInfo, logDebug, logTelemetry
  , noLogging
  ) where

import qualified Data.Text as T


data Priority
-- Don't change the ordering of this type or you will mess up the Ord
-- instance
    = Telemetry -- ^ Events that are useful for gathering user metrics.
    | Debug -- ^ Verbose debug logging.
    | Info  -- ^ Useful information in case an error has to be understood.
    | Warning
      -- ^ These error messages should not occur in a expected usage, and
      -- should be investigated.
    | Error -- ^ Such log messages must never occur in expected usage.
    deriving (Priority -> Priority -> Bool
(Priority -> Priority -> Bool)
-> (Priority -> Priority -> Bool) -> Eq Priority
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Priority -> Priority -> Bool
$c/= :: Priority -> Priority -> Bool
== :: Priority -> Priority -> Bool
$c== :: Priority -> Priority -> Bool
Eq, Int -> Priority -> ShowS
[Priority] -> ShowS
Priority -> String
(Int -> Priority -> ShowS)
-> (Priority -> String) -> ([Priority] -> ShowS) -> Show Priority
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [Priority] -> ShowS
$cshowList :: [Priority] -> ShowS
show :: Priority -> String
$cshow :: Priority -> String
showsPrec :: Int -> Priority -> ShowS
$cshowsPrec :: Int -> Priority -> ShowS
Show, Eq Priority
Eq Priority
-> (Priority -> Priority -> Ordering)
-> (Priority -> Priority -> Bool)
-> (Priority -> Priority -> Bool)
-> (Priority -> Priority -> Bool)
-> (Priority -> Priority -> Bool)
-> (Priority -> Priority -> Priority)
-> (Priority -> Priority -> Priority)
-> Ord Priority
Priority -> Priority -> Bool
Priority -> Priority -> Ordering
Priority -> Priority -> Priority
forall a.
Eq a
-> (a -> a -> Ordering)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> Bool)
-> (a -> a -> a)
-> (a -> a -> a)
-> Ord a
min :: Priority -> Priority -> Priority
$cmin :: Priority -> Priority -> Priority
max :: Priority -> Priority -> Priority
$cmax :: Priority -> Priority -> Priority
>= :: Priority -> Priority -> Bool
$c>= :: Priority -> Priority -> Bool
> :: Priority -> Priority -> Bool
$c> :: Priority -> Priority -> Bool
<= :: Priority -> Priority -> Bool
$c<= :: Priority -> Priority -> Bool
< :: Priority -> Priority -> Bool
$c< :: Priority -> Priority -> Bool
compare :: Priority -> Priority -> Ordering
$ccompare :: Priority -> Priority -> Ordering
$cp1Ord :: Eq Priority
Ord, Int -> Priority
Priority -> Int
Priority -> [Priority]
Priority -> Priority
Priority -> Priority -> [Priority]
Priority -> Priority -> Priority -> [Priority]
(Priority -> Priority)
-> (Priority -> Priority)
-> (Int -> Priority)
-> (Priority -> Int)
-> (Priority -> [Priority])
-> (Priority -> Priority -> [Priority])
-> (Priority -> Priority -> [Priority])
-> (Priority -> Priority -> Priority -> [Priority])
-> Enum Priority
forall a.
(a -> a)
-> (a -> a)
-> (Int -> a)
-> (a -> Int)
-> (a -> [a])
-> (a -> a -> [a])
-> (a -> a -> [a])
-> (a -> a -> a -> [a])
-> Enum a
enumFromThenTo :: Priority -> Priority -> Priority -> [Priority]
$cenumFromThenTo :: Priority -> Priority -> Priority -> [Priority]
enumFromTo :: Priority -> Priority -> [Priority]
$cenumFromTo :: Priority -> Priority -> [Priority]
enumFromThen :: Priority -> Priority -> [Priority]
$cenumFromThen :: Priority -> Priority -> [Priority]
enumFrom :: Priority -> [Priority]
$cenumFrom :: Priority -> [Priority]
fromEnum :: Priority -> Int
$cfromEnum :: Priority -> Int
toEnum :: Int -> Priority
$ctoEnum :: Int -> Priority
pred :: Priority -> Priority
$cpred :: Priority -> Priority
succ :: Priority -> Priority
$csucc :: Priority -> Priority
Enum, Priority
Priority -> Priority -> Bounded Priority
forall a. a -> a -> Bounded a
maxBound :: Priority
$cmaxBound :: Priority
minBound :: Priority
$cminBound :: Priority
Bounded)


-- | Note that this is logging actions _of the program_, not of the user.
--   You shouldn't call warning/error if the user has caused an error, only
--   if our code has gone wrong and is itself erroneous (e.g. we threw an exception).
data Logger = Logger {Logger -> Priority -> Text -> IO ()
logPriority :: Priority -> T.Text -> IO ()}


logError :: Logger -> T.Text -> IO ()
logError :: Logger -> Text -> IO ()
logError Logger
x = Logger -> Priority -> Text -> IO ()
logPriority Logger
x Priority
Error

logWarning :: Logger -> T.Text -> IO ()
logWarning :: Logger -> Text -> IO ()
logWarning Logger
x = Logger -> Priority -> Text -> IO ()
logPriority Logger
x Priority
Warning

logInfo :: Logger -> T.Text -> IO ()
logInfo :: Logger -> Text -> IO ()
logInfo Logger
x = Logger -> Priority -> Text -> IO ()
logPriority Logger
x Priority
Info

logDebug :: Logger -> T.Text -> IO ()
logDebug :: Logger -> Text -> IO ()
logDebug Logger
x = Logger -> Priority -> Text -> IO ()
logPriority Logger
x Priority
Debug

logTelemetry :: Logger -> T.Text -> IO ()
logTelemetry :: Logger -> Text -> IO ()
logTelemetry Logger
x = Logger -> Priority -> Text -> IO ()
logPriority Logger
x Priority
Telemetry


noLogging :: Logger
noLogging :: Logger
noLogging = (Priority -> Text -> IO ()) -> Logger
Logger ((Priority -> Text -> IO ()) -> Logger)
-> (Priority -> Text -> IO ()) -> Logger
forall a b. (a -> b) -> a -> b
$ \Priority
_ Text
_ -> () -> IO ()
forall (m :: * -> *) a. Monad m => a -> m a
return ()