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|
module Issue.Tag
( Tag (..),
extractTags,
tagKey,
tagValue,
tagValuesOf,
)
where
import CMark qualified as D
import Data.Binary (Binary)
import Data.Maybe (catMaybes, mapMaybe)
import Data.Text (Text)
import Data.Text qualified as T
import GHC.Generics (Generic)
data Tag = Tag Text (Maybe Text) deriving (Show, Generic, Binary, Eq)
tagKey :: Tag -> Text
tagKey (Tag k _) = k
tagValue :: Tag -> Maybe Text
tagValue (Tag _ v) = v
tagValuesOf :: Text -> [Tag] -> [Text]
tagValuesOf key =
mapMaybe
( \tag ->
if tagKey tag == key
then tagValue tag
else Nothing
)
extractTags :: Text -> [Tag]
extractTags = collect . D.commonmarkToNode []
where
collect (D.Node _ (D.CODE _) _) = []
collect (D.Node _ (D.CODE_BLOCK _ _) _) = []
collect (D.Node _ (D.TEXT s) ns) = extract s ++ concatMap collect ns
collect (D.Node _ _ []) = []
collect (D.Node _ _ ns) = concatMap collect ns
extract =
catMaybes
. map
( ( \case
((T.uncons -> Just ('@', k)) : v) ->
case T.strip (T.unwords v) of
"" -> Just (Tag k Nothing)
v' -> Just (Tag k (Just v'))
_ -> Nothing
)
. T.words
)
. T.lines
|
