Flippi-0.0.3: src/ScriptSyntax.hs

{-
Copyright (c) 2004, Philippa Jane Cowderoy
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-}

module ScriptSyntax (scriptLink, matchScriptLink) where

import Text.Html
import Text.ParserCombinators.Parsec
import List

data ScriptParm = Field String | Value String String

scriptname = many1 alphaNum

fieldname = many1 alphaNum

parmstring = do char '"'
                ps <- manyTill anyChar (char '"')
                return ps

scriptparm = try (do f <- fieldname
                     char '='
                     p <- parmstring
                     return (Value f p)
                 )
             <|> 
             do f <- fieldname
                return (Field f)

scriptLink sn = do char '['
                   char ':'
                   s <- scriptname
                   char '|'
                   ps <- many (do p <- scriptparm
                                  many (char ' ') 
                                  return p
                              )
                   char '|'
                   t <- manyTill anyChar (try $ do char ':'; char ']';)
                   t <- case t of
                           [] -> return s
                           _ -> return t
                   case ps of 
                    [] -> linkToScript s t
                    ps -> return (form (
                                    (foldl1 (\a b->a +++ br +++ b)
                                            (map parmToField ps)
                                    )
                                    +++
                                    input ! [thetype "submit", value t]
                                  ) ! [action (stringToHtmlString sn ++ 
                                               "?script=" ++ 
                                               (stringToHtmlString s)
                                              ),
                                       method "post"
                                      ]
                                 )
              where parmToField (Value f v) = 
                      input ! [thetype "hidden", 
                               name f, 
                               value (stringToHtmlString v)
                              ] 
                    parmToField (Field f) = 
                      stringToHtmlString (f ++ ": ")
                      +++
                      input ! [thetype "text", 
		               name f, 
		               value (stringToHtmlString "")
                              ]
                    linkToScript s t = 
                      return (anchor (stringToHtml t)
                              ! [href (sn ++ "?script=" ++ 
                                       (stringToHtmlString s)
                                      )
                                ]
                             )

matchScriptLink = do char '['
                     char ':'
                     s <- scriptname
                     char '|'
                     ps <- many (try (do f <- fieldname
                                         char '='
                                         p <- parmstring
                                         spaces <- many (char ' ')
                                         return (f ++ "=\"" 
                                                 ++ p ++ 
                                                 "\"" ++ 
                                                 spaces
                                                )
                                     )
                                 <|>
                                 (do f <- fieldname
                                     spaces <- many (char ' ')
                                     return (f ++ spaces)
                                 )
                                )
                     char '|'
                     t <- manyTill anyChar (try $ do char ':'; char ']';)
                     return (stringToHtml ("[:" ++ s ++ "|" ++ 
                                           (concat ps) ++ "|" 
                                           ++ t ++ ":]"
                                          )
                            )