git.iko.soy/typeable/servant-reflex
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typeable/servant-reflex/exec/Example.hs
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1{-# LANGUAGE FlexibleContexts #-}
2{-# LANGUAGE GADTs #-}
3{-# LANGUAGE OverloadedStrings #-}
4{-# LANGUAGE RankNTypes #-}
5{-# LANGUAGE RecursiveDo #-}
6{-# LANGUAGE ScopedTypeVariables #-}
8module Main where
10------------------------------------------------------------------------------
11import Data.Bool
12import Data.Maybe
13import Control.Monad.Fix (MonadFix)
14import Data.Monoid (First(..), (<>))
15import Data.Text (Text)
16import qualified Data.Text as T
17import GHC.TypeLits
18import Servant.API
19import API
20import Data.Proxy
21import Text.Read (readMaybe)
22import Reflex.Dom
23------------------------------------------------------------------------------
24import Servant.Reflex
25import Servant.Reflex.Multi
28api :: Proxy API
29api = Proxy
31main :: IO ()
32main = mainWidget $ do
33 el "h1" $ text "Wowzers!"
34 divClass "example-base" run
35 divClass "example-multi" runMulti
38runMulti :: forall t m. (SupportsServantReflex t m,
39 DomBuilder t m,
40 DomBuilderSpace m ~ GhcjsDomSpace,
41 MonadFix m,
42 PostBuild t m,
43 MonadHold t m) => m ()
44runMulti = do
45 url <- baseUrlWidget
46 el "br" blank
47 let (_ :<|> _ :<|> sayHi :<|> dbl :<|> _ :<|> _ ) =
48 clientA api (Proxy :: Proxy m) (Proxy :: Proxy []) (Proxy :: Proxy Int) url
50 num :: Dynamic t (Either Text Double) <- fmap (note "No read" . readMaybe . T.unpack) . value <$> textInput def
51 num2 :: Dynamic t (Either Text Double) <- fmap (note "No read" . readMaybe . T.unpack) . value <$> textInput def
53 b <- button "Run dbl multi"
54 reqCount :: Dynamic t Int <- count b
55 r <- dbl ((\x y -> [x,y]) <$> num <*> num2) (tag (current reqCount) b)
56 dynText =<< holdDyn "Waiting" (T.pack . show . fmap reqSuccess <$> r)
58 lastInd <- holdDyn [] $ fmap reqTag <$> r
59 display lastInd
61 divClass "demo-group" $ do
62 nms <- fmap (fmap T.words . value) $ divClass "" $ do
63 text "Names"
64 textInput def
65 grts <- fmap (fmap T.words . value) $ divClass "" $ do
66 text "Greetings"
67 textInput def
68 gust <- fmap value $ divClass "gusto-input" $ checkbox False def
69 b <- button "Go"
70 r' <- sayHi (fmap QParamSome <$> nms) (fmap (:[]) grts) (constDyn [True, False]) (1 <$ b)
72 dynText =<< holdDyn "Waiting" (T.pack . show . catMaybes . fmap reqSuccess <$> r')
74 return ()
76run :: forall t m. (SupportsServantReflex t m,
77 DomBuilder t m,
78 DomBuilderSpace m ~ GhcjsDomSpace,
79 MonadFix m,
80 PostBuild t m,
81 MonadHold t m) => m ()
82run = mdo
84 reqCount <- count $ leftmost
85 [() <$ unitBtn, () <$ intBtn, () <$ sayHiClicks, () <$ dblBtn, () <$ mpGo]
86 -- Allow user to choose the url target for the request
87 -- (alternatively we could just `let url = constDyn (BasePath "/")`)
88 url <- baseUrlWidget
89 el "br" (return ())
90 dynText $ showBaseUrl <$> url
92 el "br" (return ())
94 -- Name the computed API client functions
95 let (getUnit :<|> getInt :<|> sayhi :<|> dbl :<|> multi :<|> qna :<|> doRaw) =
96 client api (Proxy :: Proxy m) (Proxy :: Proxy Int) url
98 c2 = client (Proxy :: Proxy ComprehensiveAPI) (Proxy :: Proxy m) (Proxy :: Proxy ()) url -- Just make sure this compiles for now
100 (unitBtn, intBtn) <- elClass "div" "demo-group" $ do
101 unitBtn <- divClass "unit-button" $ button "Get unit"
102 intBtn <- divClass "int-button" $ button "Get int"
104 unitResponse <- getUnit $ tag (current reqCount) unitBtn
105 intResponse :: Event t (ReqResult Int Int) <- getInt $ tag (current reqCount) intBtn
107 score <- foldDyn (+) 0 (fmapMaybe reqSuccess intResponse)
109 r <- holdDyn "Waiting" $ showXhrResponse <$>
110 leftmost [fmapMaybe response unitResponse
111 ,fmapMaybe response intResponse
112 ]
113 divClass "unit-int-response" $ el "p" $ dynText r >> el "br" (return ()) >> text "Total: " >> display score
114 return (unitBtn, intBtn)
116 sayHiClicks <- elClass "div" "demo-group" $ do
118 text "Name"
119 el "br" $ return ()
120 inp :: Dynamic t Text <- fmap value $ divClass "name-input" $ textInput def
121 let checkedName = fmap (\i -> bool (QParamSome i) (QParamInvalid "Need a name") (T.null i)) inp
122 el "br" $ return ()
124 text "Greetings (space-separated)"
125 el "br" $ return ()
126 greetings <- fmap (fmap T.words . value) $
127 divClass "greetings-input" $ textInput def
129 el "br" $ return ()
131 gusto <- fmap value $ divClass "gusto-input" $ checkbox False def
133 el "br" $ return ()
134 sayHiClicks :: Event t () <- divClass "hi-button" $ button "Say hi"
135 let triggers = leftmost [sayHiClicks, () <$ updated inp]
137 resp <- sayhi checkedName greetings gusto (tag (current reqCount) triggers)
138 divClass "greeting-response" $ dynText =<<
139 holdDyn "No hi yet" (leftmost [ fmapMaybe reqSuccess resp
140 , fmapMaybe reqFailure resp])
141 return sayHiClicks
143 dblBtn <- elClass "div" "demo-group" $ do
144 text "A Double to double"
145 el "br" $ return ()
146 dblinp <- fmap value $ divClass "double-input" $ textInput def
147 dblBtn <- divClass "double-button" $ button "Double it"
148 dblResp <- dbl ((note "read failure" . readMaybe . T.unpack) <$>
149 dblinp) (tag (current reqCount) dblBtn)
150 divClass "double-errors" $ dynText =<<
151 holdDyn "(no errors)" (fmapMaybe reqFailure dblResp)
152 el "br" (return ())
153 divClass "double-result" $ el "p" $ dynText =<<
154 holdDyn "No number yet" (tShow <$>
155 fmapMaybe reqSuccess dblResp)
156 return dblBtn
158 mpGo <- elClass "div" "demo-group" $ do
159 text "Multi-part path"
160 b <- value <$> checkbox False def
161 mpGo <- button "Test"
162 multiResp <- multi b (tag (current reqCount) mpGo)
163 dynText =<< holdDyn "No res yet" (tShow <$>
164 fmapMaybe reqSuccess
165 multiResp)
166 return mpGo
168 return ()
170 el "br" $ return ()
172 elClass "div" "demo-group" $ do
173 text "JSON Unicode encoding test"
174 txt <- value <$> textInput def
175 ev <- (1 <$) <$> button "Question"
176 let dQ = Right . Question <$> traceDyn "will send: " txt
177 rr <- qna dQ ev
178 el "p" $
179 dynText =<< holdDyn "No Answer" (unAnswer <$> fmapMaybe reqSuccess rr)
181showXhrResponse :: XhrResponse -> Text
182showXhrResponse (XhrResponse stat stattxt rbmay rtmay respHeaders) =
183 T.unlines ["stat: " <> tShow stat
184 ,"stattxt: " <> tShow stattxt
185 ,"resp: " <> maybe "" showRB rbmay
186 ,"rtext: " <> tShow rtmay
187 ,"rHeaders: " <> tShow respHeaders]
189tShow :: Show a => a -> Text
190tShow = T.pack . show
192showRB :: XhrResponseBody -> Text
193showRB (XhrResponseBody_Default t) = tShow t
194showRB (XhrResponseBody_Text t) = tShow t
195showRB (XhrResponseBody_Blob t) = "<Blob>"
196showRB (XhrResponseBody_ArrayBuffer t) = tShow t
198note :: e -> Maybe a -> Either e a
199note e = maybe (Left e) Right