stylized: Ways to output stylized text on ANSI consoles.

{-

.: Sample usage :.
  :------------:

  You can run this README with: `runhaskell README`

-}


-- 0) import stylized module

import System.Console.ANSI.Stylized


-- 1) a data type to 'tag' messages:

data MsgType
  = Info
  | Warning
  | Error
  deriving (Enum)


-- 2) a function from tags to styles:

stylemap :: MsgType -> Style
stylemap Info    = ((Dull, Green), (NormalIntensity, NoUnderline))
stylemap Warning = ((Dull, Yellow), (NormalIntensity, NoUnderline))
stylemap Error   = ((Dull, Red), (NormalIntensity, NoUnderline))


-- 3) a logging function built from 'T' ending functions (i.e. putLnT and putT)

myLogLn msg = putLnT stylemap msg >> resetGR
myLog msg = putT stylemap msg >> resetGR


-- 4) some example messages:

msgs1 = [
  (Info, "Info Message\n"),
  (Warning, "Warning Message\n"),
  (Error, "Error Message") ]

msgs2 = zip (cycle $ enumFrom Info) ["some ", "random ", "messages "]


-- 5) print:

main = do
  myLog   msgs2
  myLogLn msgs2
  myLogLn msgs1


-- 6) you can always use S-ending functions ('curried' or 'uncurried' ones)

  putStrLnS ((Dull, Blue), (NormalIntensity, SingleUnderline)) "blue underlined"
  putLnS
    [ (((Vivid, Yellow), (NormalIntensity, NoUnderline)), "vivid yellow ")
    , (((Vivid, Blue), (NormalIntensity, NoUnderline)), "vivid blue")
    ]


-- 7) Remember to reset (if you want to)!

  resetGR