2023-12-23 22:15:10 +01:00
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{- This Source Code Form is subject to the terms of the Mozilla Public License,
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v. 2.0. If a copy of the MPL was not distributed with this file, You can
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obtain one at https://mozilla.org/MPL/2.0/. -}
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2023-12-12 18:51:44 +01:00
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-- | Transformers and exceptions.
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module SlackBuilder.Trans
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( SlackBuilderException(..)
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, SlackBuilderT(..)
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, relativeToRepository
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) where
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import Control.Monad.Trans.Reader (ReaderT(..), asks)
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import Data.Text (Text)
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import qualified Data.Text as Text
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import SlackBuilder.Config
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import Control.Monad.IO.Class (MonadIO(..))
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import Control.Monad.Catch (MonadCatch(..), MonadThrow(..))
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import Control.Exception (Exception(..))
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import System.FilePath ((</>))
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import Text.URI (URI)
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import qualified Text.URI as URI
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import qualified Codec.Compression.Lzma as Lzma
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data SlackBuilderException
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= UpdaterNotFound Text
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| HttpsUrlExpected URI
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| LzmaDecompressionFailed Lzma.LzmaRet
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deriving Show
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instance Exception SlackBuilderException
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where
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displayException (UpdaterNotFound updateName) = Text.unpack
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$ Text.concat ["Requested package \"", updateName, "\" was not found"]
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displayException (HttpsUrlExpected givenURI) = Text.unpack
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$ "Only https URLs are supported, got: " <> URI.render givenURI
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displayException (LzmaDecompressionFailed Lzma.LzmaRetOK) =
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"Operation completed successfully"
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displayException (LzmaDecompressionFailed Lzma.LzmaRetStreamEnd) =
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"End of stream was reached"
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displayException (LzmaDecompressionFailed Lzma.LzmaRetUnsupportedCheck) =
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"Cannot calculate the integrity check"
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displayException (LzmaDecompressionFailed Lzma.LzmaRetGetCheck) =
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"Integrity check type is now available"
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displayException (LzmaDecompressionFailed Lzma.LzmaRetMemError) =
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"Cannot allocate memory"
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displayException (LzmaDecompressionFailed Lzma.LzmaRetMemlimitError) =
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"Memory usage limit was reached"
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displayException (LzmaDecompressionFailed Lzma.LzmaRetFormatError) =
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"File format not recognized"
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displayException (LzmaDecompressionFailed Lzma.LzmaRetOptionsError) =
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"Invalid or unsupported options"
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displayException (LzmaDecompressionFailed Lzma.LzmaRetDataError) =
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"Data is corrupt"
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displayException (LzmaDecompressionFailed Lzma.LzmaRetBufError) =
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"No progress is possible"
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displayException (LzmaDecompressionFailed Lzma.LzmaRetProgError) =
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"Programming error"
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newtype SlackBuilderT a = SlackBuilderT
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{ runSlackBuilderT :: ReaderT Settings IO a
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}
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relativeToRepository :: FilePath -> SlackBuilderT FilePath
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relativeToRepository filePath =
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(</> filePath) <$> SlackBuilderT (asks repository)
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instance Functor SlackBuilderT
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where
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fmap f (SlackBuilderT slackBuilderT) = SlackBuilderT $ f <$> slackBuilderT
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instance Applicative SlackBuilderT
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where
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pure = SlackBuilderT . pure
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(SlackBuilderT f) <*> (SlackBuilderT x) = SlackBuilderT $ f <*> x
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instance Monad SlackBuilderT
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where
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return = pure
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(SlackBuilderT x) >>= f = SlackBuilderT $ x >>= runSlackBuilderT . f
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instance MonadIO SlackBuilderT
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where
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liftIO = SlackBuilderT . liftIO
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instance MonadThrow SlackBuilderT
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where
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throwM = SlackBuilderT . throwM
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instance MonadCatch SlackBuilderT
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where
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catch (SlackBuilderT action) handler =
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SlackBuilderT $ catch action $ runSlackBuilderT . handler
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