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|
module Tomato.Retrieve
( randomTomato
, downloadTomato
, queryTomato
) where
import RIO
import Network.HTTP.Req
( jsonResponse
, bsResponse
, req
, Req
, runReq
, defaultHttpConfig
, NoReqBody (..)
, (/:)
, (=:)
, GET (..)
, https
, responseBody
)
import Tomato.App (App (..))
import Tomato.Data.Except (DecodeException (..))
import Tomato.Data.Tomato (Tomato (..), Links (..))
import qualified Data.Aeson as Ae
import qualified RIO.ByteString as B
import qualified RIO.Text as T
-- | Get a random tomato
randomTomato :: RIO App ()
randomTomato = queryTomato >>= downloadTomato
-- | Ask for a tomato
queryTomato :: RIO App Tomato
queryTomato = do
clientId <- asks appClientId
let url = https "api.unsplash.com" /: "photos" /: "random"
js <- rr $ req GET url NoReqBody jsonResponse $
"query" =: ("tomato" :: Text) <>
"client_id" =: clientId
tomato <- case Ae.fromJSON (responseBody js) of
Ae.Success r -> pure r
Ae.Error s -> throwM $ DecodeException $ "Get tomato url" <> T.pack s
return tomato
-- | Download a specific tomato
downloadTomato :: Tomato -> RIO App ()
downloadTomato tom = do
tomatoFile <- asks appFile
clientId <- asks appClientId
let url = download (links tom)
bs <- rr $ req GET url NoReqBody bsResponse $
"query" =: ("tomato" :: Text) <>
"client_id" =: clientId
B.writeFile tomatoFile (responseBody bs)
rr :: Req a -> RIO App a
rr = runReq defaultHttpConfig
|
