yammat/Handler/Transfer.hs
2018-09-04 18:06:12 +02:00

99 lines
3.3 KiB
Haskell

-- yammat - Yet Another MateMAT
-- Copyright (C) 2015 Amedeo Molnár
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Affero General Public License as published
-- by the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Affero General Public License for more details.
--
-- You should have received a copy of the GNU Affero General Public License
-- along with this program. If not, see <http://www.gnu.org/licenses/>.
module Handler.Transfer where
import Import
import Handler.Common
import Data.Maybe
import Text.Shakespeare.Text (stext)
getTransferSelectR :: UserId -> Handler Html
getTransferSelectR from =
isUser from HomeR >>= (\_ -> do
users <- runDB $ selectList [UserId !=. from] [Asc UserIdent]
defaultLayout $ do
setTitleI MsgTransfer
$(widgetFile "transferSelect")
)
getTransferR :: UserId -> UserId -> Handler Html
getTransferR from to =
isUser from HomeR >>= (\sender ->
isUser to (TransferSelectR from) >>= (\recpt -> do
(transferWidget, enctype) <- generateFormPost
$ renderBootstrap3 BootstrapBasicForm transferForm
currency <- appCurrency <$> appSettings <$> getYesod
defaultLayout $ do
setTitleI MsgTransfer
$(widgetFile "transfer")
)
)
postTransferR :: UserId -> UserId -> Handler Html
postTransferR from to =
isUser from HomeR >>= (\sender ->
isUser to (TransferSelectR from) >>= (\recpt -> do
((res, _), _) <- runFormPost
$ renderBootstrap3 BootstrapBasicForm transferForm
case res of
FormSuccess amount
| amount < 0 -> do
setMessageI MsgNegativeTransfer
redirect $ TransferR from to
| userBalance sender < amount -> do
setMessageI MsgNotEnoughFunds
redirect HomeR
| otherwise -> do
runDB $ update from [UserBalance -=. amount]
runDB $ update to [UserBalance +=. amount]
master <- getYesod
liftIO $ notify sender recpt amount master
setMessageI MsgTransferComplete
redirect HomeR
_ -> do
setMessageI MsgTransferError
redirect HomeR
)
)
transferForm :: AForm Handler Int
transferForm = areq currencyField (bfs MsgValue) (Just 0)
<* bootstrapSubmit (msgToBSSubmit MsgTransfer)
notify :: User -> User -> Int -> App -> IO ()
notify sender rcpt amount master = do
when (isJust $ userEmail sender) $
liftIO $ sendMail (fromJust $ userEmail sender) "Guthabentransfer beim Matematen"
[stext|
Hallo #{userIdent sender}
Du hast gerade #{formatIntCurrency amount}#{appCurrency $ appSettings master} an #{userIdent rcpt} transferiert.
Viele Grüße,
Dein Matemat
|]
when (isJust $ userEmail rcpt) $
liftIO $ sendMail (fromJust $ userEmail rcpt) "Guthabentransfer eingetroffen"
[stext|
Hallo #{userIdent rcpt}
Du hast gerade #{formatIntCurrency amount}#{appCurrency $ appSettings master} von #{userIdent sender} erhalten.
Viele Grüße,
Dein Matemat
|]