{-# OPTIONS_HADDOCK show-extensions #-}

-- |
-- Module      :  CLI.Arguments
-- Copyright   :  (c) OleksandrZhabenko 2021-2022
-- License     :  MIT
-- Stability   :  Experimental
-- Maintainer  :  olexandr543@yahoo.com
--
-- A library to process command line arguments in some more convenient way.

module CLI.Arguments where

import Data.Monoid (mappend)

data Arguments =
  A String
  | B GQtyArgs Delimiter [String]
  | C Delimiter [String]
      deriving Arguments -> Arguments -> Bool
(Arguments -> Arguments -> Bool)
-> (Arguments -> Arguments -> Bool) -> Eq Arguments
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: Arguments -> Arguments -> Bool
$c/= :: Arguments -> Arguments -> Bool
== :: Arguments -> Arguments -> Bool
$c== :: Arguments -> Arguments -> Bool
Eq

type Args = [Arguments]

type Specification = (Delimiter,GQtyArgs)

type CLSpecifications = [Specification]

type Delimiter = String

type GQtyArgs = Int

type FirstCharacter = Char

type FirstChars = (Char,Char)

instance Show Arguments where
  show :: Arguments -> String
show (A String
xs) = String
xs
  show (B Int
n String
ys [String]
yss) = Char
' 'Char -> ShowS
forall a. a -> [a] -> [a]
:String
ys String -> ShowS
forall a. Monoid a => a -> a -> a
`mappend` ShowS -> [String] -> String
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap (\String
xs ->Char
' 'Char -> ShowS
forall a. a -> [a] -> [a]
:ShowS
forall a. Show a => a -> String
show String
xs) (Int -> [String] -> [String]
forall a. Int -> [a] -> [a]
take Int
n [String]
yss)
  show (C String
xs [String]
xss) = Char
' 'Char -> ShowS
forall a. a -> [a] -> [a]
:String
xs String -> ShowS
forall a. Monoid a => a -> a -> a
`mappend` ShowS -> [String] -> String
forall (t :: * -> *) a b. Foldable t => (a -> [b]) -> t a -> [b]
concatMap (\String
ys ->Char
' 'Char -> ShowS
forall a. a -> [a] -> [a]
:ShowS
forall a. Show a => a -> String
show String
ys) [String]
xss String -> ShowS
forall a. Monoid a => a -> a -> a
`mappend` (Char
' 'Char -> ShowS
forall a. a -> [a] -> [a]
:String
xs)

isA :: Arguments -> Bool
isA :: Arguments -> Bool
isA (A String
_) = Bool
True
isA Arguments
_ = Bool
False

isB :: Arguments -> Bool
isB :: Arguments -> Bool
isB (B Int
_ String
_ [String]
_) = Bool
True
isB Arguments
_ = Bool
False

isC :: Arguments -> Bool
isC :: Arguments -> Bool
isC (C String
_ [String]
_) = Bool
True
isC Arguments
_ = Bool
False

nullArguments :: Arguments -> Bool
nullArguments :: Arguments -> Bool
nullArguments (A String
xs) = String -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null String
xs
nullArguments (B Int
n String
ys [String]
yss) = Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
/= [String] -> Int
forall (t :: * -> *) a. Foldable t => t a -> Int
length [String]
yss Bool -> Bool -> Bool
|| String -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null String
ys  Bool -> Bool -> Bool
|| [String] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [String]
yss
nullArguments (C String
xs [String]
xss) = String -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null String
xs Bool -> Bool -> Bool
|| [String] -> Bool
forall (t :: * -> *) a. Foldable t => t a -> Bool
null [String]
xss

notNullArguments :: Arguments -> Bool
notNullArguments :: Arguments -> Bool
notNullArguments (A (Char
_:String
_)) =  Bool
True
notNullArguments (A String
_) = Bool
False
notNullArguments (B Int
n (Char
_:String
_) yss :: [String]
yss@(String
_:[String]
_)) = Int
n Int -> Int -> Bool
forall a. Eq a => a -> a -> Bool
== [String] -> Int
forall (t :: * -> *) a. Foldable t => t a -> Int
length [String]
yss
notNullArguments (B Int
_ String
_ [String]
_) = Bool
False
notNullArguments (C (Char
_:String
_) (String
_:[String]
_)) = Bool
True
notNullArguments Arguments
_ = Bool
False

b1Args2AArgs :: Arguments -> Arguments
b1Args2AArgs :: Arguments -> Arguments
b1Args2AArgs b :: Arguments
b@(B Int
n String
_ [String
ys])
 | Int
n Int -> Int -> Bool
forall a. Ord a => a -> a -> Bool
< Int
1 = String -> Arguments
A String
ys
 | Bool
otherwise = Arguments
b
b1Args2AArgs Arguments
x = Arguments
x