Haskell literal Html
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{-# LANGUAGE OverloadedStrings #-} | |
module Lib | |
( Html, Markup(..), html, eval | |
) where | |
eval :: Html -> String | |
eval (Html head body) = "<html>" ++ evalHead head ++ evalBody body ++ "</html>" | |
evalHead :: Head -> String | |
evalHead (Head resources) = "<head>" ++ concatMap evalResource resources ++ "</head>" | |
evalResource :: Resource -> String | |
evalResource resource = "" | |
evalBody :: Body -> String | |
evalBody (Body markups) = "<body>" ++ concatMap evalMarkup markups ++ "</body>" | |
evalMarkup :: Markup -> String | |
evalMarkup (Div attrs markup) = "<div" ++ concatMap evalAttr attrs ++ ">" ++ concatMap evalMarkup markup ++ "</div>" | |
evalMarkup (Text str) = str | |
evalAttr :: Attr -> String | |
evalAttr (name, value) = " " ++ name ++ "=\"" ++ value ++ "\"" | |
-- model | |
data Html = | |
Html Head Body | |
data Head = Head [Resource] | |
data Resource = Resource | |
data Body = Body [Markup] | |
data Markup = | |
Div [Attr] [Markup] | |
| Text String | |
type Attr = (String, String) | |
html :: Html | |
html = Html | |
(Head []) | |
(Body [ | |
Div [("class", "mystyle")] | |
[ | |
Text "1" | |
, Text "2" | |
, Text "3" | |
] | |
]) |
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