From 9db2c42f4880362cf098358de830415c14f6878c Mon Sep 17 00:00:00 2001
From: Gregor Kleen <gkleen@yggdrasil.li>
Date: Fri, 25 Dec 2015 17:56:13 +0000
Subject: Cleaned tree for rewrite

---
 bbcode/src/BBCode/Syntax.hs | 108 --------------------------------------------
 1 file changed, 108 deletions(-)
 delete mode 100644 bbcode/src/BBCode/Syntax.hs

(limited to 'bbcode/src/BBCode/Syntax.hs')

diff --git a/bbcode/src/BBCode/Syntax.hs b/bbcode/src/BBCode/Syntax.hs
deleted file mode 100644
index a196e05..0000000
--- a/bbcode/src/BBCode/Syntax.hs
+++ /dev/null
@@ -1,108 +0,0 @@
-{-# LANGUAGE RecordWildCards #-}
-
-module BBCode.Syntax
-       ( treeify
-       , ContentForest
-       , ContentTree(..)
-       ) where
-
-import BBCode.Tokenizer (Token(..))
-
-import Data.Foldable
-import Data.Bifunctor
-import Data.Monoid
-
-import Control.Monad.State
-import Control.Monad.Trans
-import Control.Monad
-  
-import           Data.CaseInsensitive  ( CI )
-import qualified Data.CaseInsensitive as CI
-
-import Data.Function (on)
-
-type ContentForest = [ContentTree]
-data ContentTree = Content String
-                 | Tagged [ContentTree] String
-                 | Empty
-                 deriving (Show, Eq)
-
-data Step = Down [ContentTree] [ContentTree] String
-          deriving (Show)
-
-data Zipper = Zipper
-              { hole :: String
-              , prevs :: [ContentTree]
-              , steps :: [Step]
-              }
-              deriving (Show)
-
-type Parser = StateT Zipper (Either String)
-abort :: String -> Parser a
-abort = lift . Left
-
-
-treeify :: [Token] -> Either String ContentForest
-treeify tokenStream = second (postProcess . unZip) $ execStateT (mapM_ incorporate tokenStream) (Zipper "" [] [])
-
-postProcess :: ContentForest -> ContentForest
-postProcess forest = do
-  tree <- forest
-  let
-    tree' = postProcess' tree
-  guard $ tree' /= Empty
-  return tree'
-  where
-    postProcess' :: ContentTree -> ContentTree
-    postProcess' (Content "") = Empty
-    postProcess' (Tagged [] _) = Empty
-    postProcess' (Tagged cs t) = Tagged [c' | c <- cs, let c' = postProcess' c, c' /= Empty ] t
-    postProcess' x = x
-
-unZip :: Zipper -> ContentForest
-unZip Zipper{..} = reverse (apply hole steps : prevs)
-
-apply :: String -> [Step] -> ContentTree
-apply hole steps = hole `apply'` (reverse steps)
-apply' "" [] = Empty
-apply' hole [] = Content hole
-apply' hole (Down pres posts tag:steps) = Tagged (reverse pres ++ [hole `apply` steps] ++ posts) tag
-
-incorporate :: Token -> Parser ()
-incorporate (Text str) = append str
-incorporate (Whitespace str)
-  | delimitsPar str = do
-      currSteps <- gets steps
-      if null currSteps then
-        modify (\Zipper{..} -> Zipper { hole = "", steps = [], prevs = (hole `apply` steps : prevs) })
-        else
-        append str
-  | otherwise = append str
-  where
-    delimitsPar str = (sum . map (const (1 :: Integer)) . filter (== '\n') $ str) >= 1
-incorporate (TagOpen tagName) = modify $ (\z@(Zipper{..}) -> z { steps = (Down [] [] tagName : steps) })
-incorporate (TagClose tagName) = do
-  currSteps <- gets steps
-  case currSteps of
-    [] -> abort $ "Closing unopenend tag: " ++ tagName
-    (Down pres posts tagName':s) -> if ((==) `on` CI.mk) tagName tagName' then
-                                      goUp
-                                    else
-                                       abort $ "Mismatched tags: [" ++ tagName' ++ "]...[/" ++ tagName ++ "]"
-
-append :: String -> Parser ()
-append str = modify (\z@(Zipper{..}) -> z { hole = hole ++ str })
-
-goUp :: Parser ()
-goUp = do
-  (Down pres posts tagName:s) <- gets steps
-  hole <- gets hole
-  let
-    steppedHole = Tagged (reverse pres ++ [Content hole] ++ posts) tagName
-  case s of
-    [] -> modify $ (\z@(Zipper{..}) -> Zipper { hole = "", prevs = steppedHole : prevs, steps = [] })
-    (t:ts) -> do
-      let
-        (Down pres posts tagName) = t
-        t' = Down (steppedHole : pres) posts tagName
-      modify $ (\z -> z { hole = "", steps = (t':ts) })
-- 
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