slackbuilder/app/SlackBuilder/Updater.hs

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module SlackBuilder.Updater
( latestPackagist
, latestText
) where
import Data.Aeson.TH (defaultOptions, deriveJSON)
import Data.HashMap.Strict (HashMap)
import qualified Data.HashMap.Strict as HashMap
import Data.Text (Text)
import qualified Data.Text as Text
import qualified Data.Text.Encoding as Text.Encoding
import Data.Vector (Vector)
import qualified Data.Vector as Vector
import Network.HTTP.Req
( runReq
, defaultHttpConfig
, req
, GET(..)
, https
, jsonResponse
, NoReqBody(..)
, (/:)
, responseBody, useHttpsURI, bsResponse
)
import Text.URI (mkURI)
import SlackBuilder.CommandLine
newtype PackagistPackage = PackagistPackage
{ version :: Text
} deriving (Eq, Show)
$(deriveJSON defaultOptions ''PackagistPackage)
newtype PackagistResponse = PackagistResponse
{ packages :: HashMap Text (Vector PackagistPackage)
} deriving (Eq, Show)
$(deriveJSON defaultOptions ''PackagistResponse)
latestPackagist :: PackagistArguments -> IO (Maybe Text)
latestPackagist PackagistArguments{..} = do
packagistResponse <- runReq defaultHttpConfig $
let uri = https "repo.packagist.org" /: "p2"
/: vendor
/: name <> ".json"
in req GET uri NoReqBody jsonResponse mempty
let packagistPackages = packages $ responseBody packagistResponse
fullName = Text.intercalate "/" [vendor, name]
pure $ HashMap.lookup fullName packagistPackages
>>= fmap (version . fst) . Vector.uncons
latestText :: TextArguments -> IO (Maybe Text)
latestText (TextArguments textArguments) = do
uri <- useHttpsURI <$> mkURI textArguments
packagistResponse <- traverse (runReq defaultHttpConfig) $ go . fst <$> uri
pure $ Text.strip . Text.Encoding.decodeASCII . responseBody
<$> packagistResponse
where
go uri = req GET uri NoReqBody bsResponse mempty