Added a small example of the frontend still being worked but commited so the downloader now works
module Main where
import PascalParser
import System
import Control.Monad
import Data.Either
import Data.List
import Data.Graph
import Data.Maybe
unident :: Identificator -> String
unident (Identificator s) = s
extractUnits :: PascalUnit -> (String, [String])
extractUnits (Program (Identificator name) (Implementation (Uses idents) _ _) _) = ("program " ++ name, map unident idents)
extractUnits (Unit (Identificator name) (Interface (Uses idents1) _) (Implementation (Uses idents2) _ _) _ _) = (name, map unident $ idents1 ++ idents2)
f :: [(String, [String])] -> String
f = unlines . map showSCC . stronglyConnComp . map (\(a, b) -> (a, a, b))
where
showSCC (AcyclicSCC v) = v
showSCC (CyclicSCC vs) = intercalate ", " vs
myf :: [(String, [String])] -> String
myf d = unlines . map (findCycle . fst) $ d
where
findCycle :: String -> String
findCycle searched = searched ++ ": " ++ (intercalate ", " $ fc searched [])
where
fc :: String -> [String] -> [String]
fc curSearch visited = let uses = curSearch `lookup` d; res = dropWhile null . map t $ fromJust uses in if isNothing uses || null res then [] else head res
where
t u =
if u == searched then
[u]
else
if u `elem` visited then
[]
else
let chain = fc u (u:visited) in if null chain then [] else u:chain
main = do
fileNames <- getArgs
files <- mapM readFile fileNames
putStrLn . myf . map extractUnits . rights . map parsePascalUnit $ files