move PGF.Quiz to GF.Quiz. It is not part of the PGF API

src/GF/Command/Commands.hs

@@ -15,7 +15,6 @@ import PGF.ShowLinearize
 import PGF.Macros
 import PGF.Data ----
 import PGF.Morphology
-import PGF.Quiz
 import PGF.VisualizeTree
 import GF.Compile.Export
 import GF.Infra.Option (noOptions)
@@ -26,6 +25,7 @@ import GF.Command.Abstract
 import GF.Command.Messages
 import GF.Text.Lexing
 import GF.Text.Transliterations
+import GF.Quiz
 
 import GF.Command.TreeOperations ---- temporary place for typecheck and compute
 

src/GF/Infra/UseIO.hs

@@ -153,34 +153,6 @@ putStrFlush s = putStr s >> hFlush stdout
 putStrLnFlush :: String -> IO ()
 putStrLnFlush s = putStrLn s >> hFlush stdout
 
--- * a generic quiz session
-
-type QuestionsAndAnswers = [(String, String -> (Integer,String))]
-
-teachDialogue :: QuestionsAndAnswers -> String -> IO ()
-teachDialogue qas welc = do
-  putStrLn $ welc ++++ genericTeachWelcome
-  teach (0,0) qas
- where 
-    teach _ [] = do putStrLn "Sorry, ran out of problems"
-    teach (score,total) ((question,grade):quas) = do
-      putStr ("\n" ++ question ++ "\n> ") 
-      answer <- getLine
-      if (answer == ".") then return () else do
-        let (result, feedback) = grade answer
-            score' = score + result 
-            total' = total + 1
-        putStr (feedback ++++ "Score" +++ show score' ++ "/" ++ show total')
-        if (total' > 9 && fromInteger score' / fromInteger total' >= 0.75)
-           then do putStrLn "\nCongratulations - you passed!"
-           else teach (score',total') quas
-
-    genericTeachWelcome = 
-      "The quiz is over when you have done at least 10 examples" ++++
-      "with at least 75 % success." +++++
-      "You can interrupt the quiz by entering a line consisting of a dot ('.').\n"
-
-
 -- * IO monad with error; adapted from state monad
 
 newtype IOE a = IOE (IO (Err a))

src/GF/Quiz.hs

@@ -0,0 +1,98 @@
+----------------------------------------------------------------------
+-- |
+-- Module      : TeachYourself
+-- Maintainer  : AR
+-- Stability   : (stable)
+-- Portability : (portable)
+--
+-- > CVS $Date: 2005/04/21 16:46:13 $ 
+-- > CVS $Author: bringert $
+-- > CVS $Revision: 1.7 $
+--
+-- translation and morphology quiz. AR 10\/5\/2000 -- 12\/4\/2002 -- 14\/6\/2008
+--------------------------------------------------------------------------------
+
+module GF.Quiz (
+  mkQuiz,
+  translationList,
+  morphologyList
+  ) where
+
+import PGF
+import PGF.ShowLinearize
+
+import GF.Data.Operations
+import GF.Infra.UseIO
+import GF.Text.Coding
+
+import System.Random
+
+import Data.List (nub)
+
+-- translation and morphology quiz. AR 10/5/2000 -- 12/4/2002
+
+-- generic quiz function
+
+mkQuiz :: String -> String -> [(String,[String])] -> IO ()
+mkQuiz cod msg tts = do
+  let qas = [ (q, mkAnswer cod as) | (q,as) <- tts]
+  teachDialogue qas msg
+
+translationList :: 
+  PGF -> Language -> Language -> Category -> Int -> IO [(String,[String])]
+translationList pgf ig og cat number = do
+  ts <- generateRandom pgf cat >>= return . take number
+  return $ map mkOne $ ts
+ where
+   mkOne t = (norml (linearize pgf ig t), map (norml . linearize pgf og) (homonyms t))
+   homonyms = nub . parse pgf ig cat . linearize pgf ig
+
+morphologyList :: PGF -> Language -> Category -> Int -> IO [(String,[String])]
+morphologyList pgf ig cat number = do
+  ts  <- generateRandom pgf cat >>= return . take (max 1 number)
+  gen <- newStdGen
+  let ss    = map (tabularLinearize pgf (mkCId ig)) ts
+  let size  = length (head ss)
+  let forms = take number $ randomRs (0,size-1) gen
+  return [(head (snd (head pws)) +++ par, ws) | 
+           (pws,i) <- zip ss forms, let (par,ws) = pws !! i]
+
+-- | compare answer to the list of right answers, increase score and give feedback 
+mkAnswer :: String -> [String] -> String -> (Integer, String) 
+mkAnswer cod as s = 
+  if (elem (norm s) as) 
+     then (1,"Yes.") 
+     else (0,"No, not" +++ s ++ ", but" ++++ enc (unlines as))
+ where
+   norm = unwords . words . decodeUnicode cod
+   enc = encodeUnicode cod
+
+norml = unwords . words
+
+
+-- * a generic quiz session
+
+type QuestionsAndAnswers = [(String, String -> (Integer,String))]
+
+teachDialogue :: QuestionsAndAnswers -> String -> IO ()
+teachDialogue qas welc = do
+  putStrLn $ welc ++++ genericTeachWelcome
+  teach (0,0) qas
+ where 
+    teach _ [] = do putStrLn "Sorry, ran out of problems"
+    teach (score,total) ((question,grade):quas) = do
+      putStr ("\n" ++ question ++ "\n> ") 
+      answer <- getLine
+      if (answer == ".") then return () else do
+        let (result, feedback) = grade answer
+            score' = score + result 
+            total' = total + 1
+        putStr (feedback ++++ "Score" +++ show score' ++ "/" ++ show total')
+        if (total' > 9 && fromInteger score' / fromInteger total' >= 0.75)
+           then do putStrLn "\nCongratulations - you passed!"
+           else teach (score',total') quas
+
+    genericTeachWelcome = 
+      "The quiz is over when you have done at least 10 examples" ++++
+      "with at least 75 % success." +++++
+      "You can interrupt the quiz by entering a line consisting of a dot ('.').\n"