module LaunchDarkly.Server.Network.Polling (pollingThread) where

import           GHC.Generics                            (Generic)
import           Data.Text                               (Text)
import qualified Data.Text as                            T
import           Network.HTTP.Client                     (Manager, Request(..), Response(..), httpLbs)
import           Data.Generics.Product                   (getField)
import           Control.Monad                           (forever)
import           Control.Concurrent                      (threadDelay)
import           Data.Aeson                              (eitherDecode, FromJSON(..))
import           Control.Monad.Logger                    (MonadLogger, logInfo, logError)
import           Control.Monad.IO.Class                  (MonadIO, liftIO)
import           Control.Monad.Catch                     (MonadMask, MonadThrow)
import           Network.HTTP.Types.Status               (ok200)

import           LaunchDarkly.Server.Network.Common      (checkAuthorization, tryHTTP, handleUnauthorized)
import           LaunchDarkly.Server.Features            (Flag, Segment)
import           LaunchDarkly.AesonCompat                (KeyMap)


import GHC.Natural (Natural)
import LaunchDarkly.Server.DataSource.Internal (DataSourceUpdates(..))
import LaunchDarkly.Server.Config.ClientContext
import LaunchDarkly.Server.Client.Internal (Status(..))
import LaunchDarkly.Server.Config.HttpConfiguration (HttpConfiguration(..), prepareRequest)

data PollingResponse = PollingResponse
    { PollingResponse -> KeyMap Flag
flags    :: !(KeyMap Flag)
    , PollingResponse -> KeyMap Segment
segments :: !(KeyMap Segment)
    } deriving (forall x. Rep PollingResponse x -> PollingResponse
forall x. PollingResponse -> Rep PollingResponse x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
$cto :: forall x. Rep PollingResponse x -> PollingResponse
$cfrom :: forall x. PollingResponse -> Rep PollingResponse x
Generic, Value -> Parser [PollingResponse]
Value -> Parser PollingResponse
forall a.
(Value -> Parser a) -> (Value -> Parser [a]) -> FromJSON a
parseJSONList :: Value -> Parser [PollingResponse]
$cparseJSONList :: Value -> Parser [PollingResponse]
parseJSON :: Value -> Parser PollingResponse
$cparseJSON :: Value -> Parser PollingResponse
FromJSON, Int -> PollingResponse -> ShowS
[PollingResponse] -> ShowS
PollingResponse -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [PollingResponse] -> ShowS
$cshowList :: [PollingResponse] -> ShowS
show :: PollingResponse -> String
$cshow :: PollingResponse -> String
showsPrec :: Int -> PollingResponse -> ShowS
$cshowsPrec :: Int -> PollingResponse -> ShowS
Show)

processPoll :: (MonadIO m, MonadLogger m, MonadMask m, MonadThrow m) => Manager -> DataSourceUpdates -> Request -> m ()
processPoll :: forall (m :: * -> *).
(MonadIO m, MonadLogger m, MonadMask m, MonadThrow m) =>
Manager -> DataSourceUpdates -> Request -> m ()
processPoll Manager
manager DataSourceUpdates
dataSourceUpdates Request
request = forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO (forall (m :: * -> *) a.
MonadCatch m =>
m a -> m (Either HttpException a)
tryHTTP forall a b. (a -> b) -> a -> b
$ Request -> Manager -> IO (Response ByteString)
httpLbs Request
request Manager
manager) forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= \case
    (Left HttpException
err)       -> $(logError) (String -> Text
T.pack forall a b. (a -> b) -> a -> b
$ forall a. Show a => a -> String
show HttpException
err)
    (Right Response ByteString
response) -> forall (m :: * -> *) body. MonadThrow m => Response body -> m ()
checkAuthorization Response ByteString
response forall (m :: * -> *) a b. Monad m => m a -> m b -> m b
>> if forall body. Response body -> Status
responseStatus Response ByteString
response forall a. Eq a => a -> a -> Bool
/= Status
ok200
        then $(logError) Text
"unexpected polling status code"
        else case (forall a. FromJSON a => ByteString -> Either String a
eitherDecode (forall body. Response body -> body
responseBody Response ByteString
response) :: Either String PollingResponse) of
            (Left String
err)   -> $(logError) (String -> Text
T.pack forall a b. (a -> b) -> a -> b
$ forall a. Show a => a -> String
show String
err)
            (Right PollingResponse
body) -> do
                Either Text ()
status <- forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO forall a b. (a -> b) -> a -> b
$ DataSourceUpdates
-> KeyMap Flag -> KeyMap Segment -> IO (Either Text ())
dataSourceUpdatesInit DataSourceUpdates
dataSourceUpdates (forall (f :: Symbol) a s. HasField' f s a => s -> a
getField @"flags" PollingResponse
body) (forall (f :: Symbol) a s. HasField' f s a => s -> a
getField @"segments" PollingResponse
body)
                case Either Text ()
status of
                  Right () -> forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO forall a b. (a -> b) -> a -> b
$ DataSourceUpdates -> Status -> IO ()
dataSourceUpdatesSetStatus DataSourceUpdates
dataSourceUpdates Status
Initialized
                  Left Text
err ->
                    $(logError) forall a b. (a -> b) -> a -> b
$ Text -> Text -> Text
T.append Text
"store failed put: " Text
err


pollingThread :: (MonadIO m, MonadLogger m, MonadMask m) => Text -> Natural -> ClientContext -> DataSourceUpdates -> m ()
pollingThread :: forall (m :: * -> *).
(MonadIO m, MonadLogger m, MonadMask m) =>
Text -> Natural -> ClientContext -> DataSourceUpdates -> m ()
pollingThread Text
baseURI Natural
pollingIntervalSeconds ClientContext
clientContext DataSourceUpdates
dataSourceUpdates = do
    let pollingMicroseconds :: Int
pollingMicroseconds = forall a b. (Integral a, Num b) => a -> b
fromIntegral Natural
pollingIntervalSeconds forall a. Num a => a -> a -> a
* Int
1000000
    Request
req <- forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO forall a b. (a -> b) -> a -> b
$ forall (m :: * -> *).
MonadThrow m =>
HttpConfiguration -> String -> m Request
prepareRequest (ClientContext -> HttpConfiguration
httpConfiguration ClientContext
clientContext) (Text -> String
T.unpack Text
baseURI forall a. [a] -> [a] -> [a]
++ String
"/sdk/latest-all") 
    forall (m :: * -> *).
(MonadIO m, MonadLogger m, MonadCatch m) =>
DataSourceUpdates -> m () -> m ()
handleUnauthorized DataSourceUpdates
dataSourceUpdates forall a b. (a -> b) -> a -> b
$ forall (f :: * -> *) a b. Applicative f => f a -> f b
forever forall a b. (a -> b) -> a -> b
$ do
        $(logInfo) Text
"starting poll"
        forall (m :: * -> *).
(MonadIO m, MonadLogger m, MonadMask m, MonadThrow m) =>
Manager -> DataSourceUpdates -> Request -> m ()
processPoll (HttpConfiguration -> Manager
tlsManager forall a b. (a -> b) -> a -> b
$ ClientContext -> HttpConfiguration
httpConfiguration ClientContext
clientContext) DataSourceUpdates
dataSourceUpdates Request
req
        $(logInfo) Text
"finished poll"
        forall (m :: * -> *) a. MonadIO m => IO a -> m a
liftIO forall a b. (a -> b) -> a -> b
$ Int -> IO ()
threadDelay Int
pollingMicroseconds