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|
{-# LANGUAGE OverloadedStrings #-}
module MdBlocks.Address
( Address(..)
, parseAddress
, addressOf
)
where
import Data.Text (Text)
import qualified Data.Text as T
import MdBlocks.Types
data Address = Address
{ addressFile :: FilePath
, addressId :: Text
}
deriving (Show, Eq)
parseAddress :: String -> Either String Address
parseAddress input =
case T.breakOn "#" (T.pack input) of
(file, ident)
| T.null file ->
Left "address must contain a file path before '#'"
| T.null ident ->
Left "address must contain a block id after '#'"
| otherwise ->
Right
Address
{ addressFile = T.unpack file
, addressId = T.drop 1 ident
}
addressOf :: Block -> Text
addressOf b =
case mdId (blockMeta b) of
Just ident ->
T.pack (blockFile b) <> "#" <> ident
Nothing ->
T.pack (blockFile b)
<> "#"
<> T.pack (show (blockNumber b))
|
