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89 lines
3.9 KiB
Haskell
89 lines
3.9 KiB
Haskell
{-# LANGUAGE RecordWildCards #-}
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{-# LANGUAGE TemplateHaskell #-}
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-- | Settings are centralized, as much as possible, into this file. This
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-- includes database connection settings, static file locations, etc.
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-- In addition, you can configure a number of different aspects of Yesod
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-- by overriding methods in the Yesod typeclass. That instance is
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-- declared in the Foundation.hs file.
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module Settings where
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import Startlude
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import qualified Control.Effect.Labelled as Fused
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import qualified Control.Exception as Exception
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import Data.Aeson
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import Data.FileEmbed ( embedFile )
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import Data.Yaml ( decodeEither' )
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import Database.Persist.Sqlite ( SqliteConf(..) )
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import Network.Wai.Handler.Warp ( HostPreference )
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import Yesod.Default.Config2 ( applyEnvValue
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, configSettingsYml
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)
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import Lib.Types.Emver
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import Lib.Types.Emver.Orphans ( )
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-- | Runtime settings to configure this application. These settings can be
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-- loaded from various sources: defaults, environment variables, config files,
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-- theoretically even a database.
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data AppSettings = AppSettings
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{ appDatabaseConf :: SqliteConf
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-- ^ Configuration settings for accessing the database.
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, appHost :: HostPreference
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-- ^ Host/interface the server should bind to.
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, appPort :: Word16
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-- ^ Port to listen on
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, appIpFromHeader :: Bool
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-- ^ Get the IP address from the header when logging. Useful when sitting
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-- behind a reverse proxy.
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, appDetailedRequestLogging :: Bool
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-- ^ Use detailed request logging system
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, appShouldLogAll :: Bool
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-- ^ Should all log messages be displayed?
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, appMgrVersionSpec :: VersionRange
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, appFilesystemBase :: Text
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, appTorSocksPort :: Word16
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-- ^ Port on localhost where the tor client is listening, defaults to 9050
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, appTorRestartCooldown :: NominalDiffTime
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}
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deriving Show
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instance FromJSON AppSettings where
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parseJSON = withObject "AppSettings" $ \o -> do
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appDatabaseConf <- o .: "database" >>= withObject
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"database conf"
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(\db -> do
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dbName <- db .: "database"
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poolSize <- db .: "poolsize"
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pure $ SqliteConf dbName poolSize
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)
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appHost <- fromString <$> o .: "host"
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appPort <- o .: "port"
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appIpFromHeader <- o .: "ip-from-header"
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appDetailedRequestLogging <- o .:? "detailed-logging" .!= False
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appShouldLogAll <- o .:? "should-log-all" .!= False
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appMgrVersionSpec <- o .: "app-mgr-version-spec"
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appFilesystemBase <- o .: "filesystem-base"
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appTorSocksPort <- o .:? "tor-socks-port" .!= 9050
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appTorRestartCooldown <- o .:? "tor-restart-cooldown" .!= (secondsToNominalDiffTime 600)
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return AppSettings { .. }
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-- | Raw bytes at compile time of @config/settings.yml@
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configSettingsYmlBS :: ByteString
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configSettingsYmlBS = $(embedFile configSettingsYml)
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-- | @config/settings.yml@, parsed to a @Value@.
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configSettingsYmlValue :: Value
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configSettingsYmlValue = either Exception.throw id $ decodeEither' configSettingsYmlBS
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-- | A version of @AppSettings@ parsed at compile time from @config/settings.yml@.
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compileTimeAppSettings :: AppSettings
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compileTimeAppSettings = case fromJSON $ applyEnvValue False mempty configSettingsYmlValue of
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Error e -> panic $ toS e
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Success settings -> settings
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injectSettings :: Monad m => AppSettings -> Fused.Labelled "appSettings" (ReaderT AppSettings) m a -> m a
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injectSettings s = flip runReaderT s . Fused.runLabelled @"appSettings"
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