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|
{-# LANGUAGE OverloadedRecordDot #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ViewPatterns #-}
module Issue.Filter
( Filter,
filterOption,
applyFilter,
)
where
import Control.Arrow (second)
import Data.Text (Text)
import Data.Text qualified as T
import Issue (Issue (..))
import Issue.Tag (Tag (..))
import Options.Applicative qualified as O
data Filter
= ExcludeByTag Text (Maybe Text)
| IncludeByTag Text (Maybe Text)
deriving (Show)
filterOption :: O.Parser [Filter]
filterOption =
O.many
( O.option
(O.maybeReader (parse . T.pack))
( O.long "filter"
<> O.short 'f'
<> O.metavar "FILTER"
<> O.help "Filters selected issues. Examples: @assigned, !@assigned joe"
)
)
where
parse s
| "@" `T.isPrefixOf` s =
Just (uncurry IncludeByTag (splitValue (T.drop 1 s)))
| "!@" `T.isPrefixOf` s =
Just (uncurry ExcludeByTag (splitValue (T.drop 2 s)))
| otherwise = Nothing
splitValue :: Text -> (Text, Maybe Text)
splitValue s = case second T.strip (T.breakOn " " s) of
(k, "") -> (k, Nothing)
(k, v) -> (k, Just v)
applyFilter :: [Filter] -> Issue -> Bool
applyFilter [] _ = True
applyFilter (IncludeByTag k v : fs) i =
applyByTag k v i && applyFilter fs i
applyFilter (ExcludeByTag k v : fs) i =
not (applyByTag k v i) && applyFilter fs i
applyByTag :: Text -> Maybe Text -> Issue -> Bool
applyByTag k v i = any ((&&) <$> matchKey <*> matchValue) i.tags
where
matchKey (Tag k' _) = k' == k
matchValue (Tag _ v') = maybe True ((==) v') v
|
