eidolon/Foundation.hs

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-- eidolon -- A simple gallery in Haskell and Yesod
-- 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
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-- along with this program. If not, see <http://www.gnu.org/licenses/>.
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module Foundation where
import Prelude
import Yesod
import Yesod.Static
import Yesod.Default.Util (addStaticContentExternal)
import Network.HTTP.Client.Conduit (Manager, HasHttpManager (getHttpManager))
import Database.Persist.Sql -- (ConnectionPool, runSqlPool)
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import Settings.StaticFiles
import Settings
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import Model
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import Text.Jasmine (minifym)
import Text.Hamlet (hamletFile)
import Yesod.Core.Types
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-- costom imports
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import Data.Text as T
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import Data.Text.Encoding
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import Control.Applicative ((<$>))
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import Network.Wai
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import Helper
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-- | The site argument for your application. This can be a good place to
-- keep settings and values requiring initialization before your application
-- starts running, such as database connections. Every handler will have
-- access to the data present here.
data App = App
{ appSettings :: AppSettings
, appStatic :: Static -- ^ Settings for static file serving.
, appConnPool :: ConnectionPool -- ^ Database connection pool.
, appHttpManager :: Manager
, appLogger :: Logger
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}
instance HasHttpManager App where
getHttpManager = appHttpManager
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-- Set up i18n messages. See the message folder.
mkMessage "App" "messages" "en"
-- This is where we define all of the routes in our application. For a full
-- explanation of the syntax, please see:
-- http://www.yesodweb.com/book/routing-and-handlers
--
-- Note that this is really half the story; in Application.hs, mkYesodDispatch
-- generates the rest of the code. Please see the linked documentation for an
-- explanation for this split.
mkYesodData "App" $(parseRoutesFile "config/routes")
type Form x = Html -> MForm (HandlerT App IO) (FormResult x, Widget)
renderLayout :: Widget -> Handler Html
renderLayout widget = do
master <- getYesod
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route <- getCurrentRoute
mmsg <- getMessage
msu <- lookupSession "userId"
username <- case msu of
Just a -> do
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let uId = getUserIdFromText a
user <- runDB $ getJust uId
return $ userName user
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Nothing ->
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return ("" :: T.Text)
slug <- case msu of
Just a -> do
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let uId = getUserIdFromText a
user <- runDB $ getJust uId
return $ userSlug user
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Nothing ->
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return ("" :: T.Text)
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let block = appSignupBlocked $ appSettings master
-- We break up the default layout into two components:
-- default-layout is the contents of the body tag, and
-- default-layout-wrapper is the entire page. Since the final
-- value passed to hamletToRepHtml cannot be a widget, this allows
-- you to use normal widget features in default-layout.
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copyrightWidget <- widgetToPageContent $
$(widgetFile "copyrightFooter")
wc <- widgetToPageContent widget
pc <- widgetToPageContent $ do
-- add parallelism js files
$(combineScripts 'StaticR
[ js_jquery_min_js
, js_jquery_poptrox_min_js
, js_skel_min_js
, js_init_js
])
$(combineStylesheets 'StaticR
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[
-- css_normalize_css
css_bootstrap_css
])
$(widgetFile "default-layout")
withUrlRenderer $(hamletFile "templates/default-layout-wrapper.hamlet")
formLayout :: Widget -> Handler Html
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formLayout widget =
renderLayout $(widgetFile "form-widget")
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approotRequest :: App -> Request -> T.Text
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approotRequest master req =
case requestHeaderHost req of
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Just a -> prefix `T.append` decodeUtf8 a
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Nothing -> appRoot $ appSettings master
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where
prefix =
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if
"https://" `isPrefixOf` appRoot (appSettings master)
then
"https://"
else
"http://"
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-- Please see the documentation for the Yesod typeclass. There are a number
-- of settings which can be configured by overriding methods here.
instance Yesod App where
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--approot = ApprootMaster $ appRoot . appSettings
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approot = ApprootRequest approotRequest
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-- change maximum content length
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maximumContentLength _ _ = Just $ 1024 ^ (5 :: Int)
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-- Store session data on the client in encrypted cookies,
-- default session idle timeout is 120 minutes
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makeSessionBackend _ = Just <$> defaultClientSessionBackend
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120 -- timeout in minutes
"config/client_session_key.aes"
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defaultLayout widget =
renderLayout $(widgetFile "default-widget")
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-- This is done to provide an optimization for serving static files from
-- a separate domain. Please see the staticRoot setting in Settings.hs
-- urlRenderOverride y (StaticR s) =
-- Just $ uncurry (joinPath y (Settings.staticRoot $ settings y)) $ renderRoute s
-- urlRenderOverride _ _ = Nothing
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-- The page to be redirected to when authentication is required.
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-- authRoute _ = Just $ AuthR LoginR
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-- This function creates static content files in the static folder
-- and names them based on a hash of their content. This allows
-- expiration dates to be set far in the future without worry of
-- users receiving stale content.
addStaticContent ext mime content = do
master <- getYesod
let staticDir = appStaticDir $ appSettings master
addStaticContentExternal
minifym
genFileName
staticDir
(StaticR . flip StaticRoute [])
ext
mime
content
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where
-- Generate a unique filename based on the content itself
genFileName lbs = "autogen-" ++ base64md5 lbs
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-- Place Javascript at head so scripts become loaded before content
jsLoader _ = BottomOfHeadBlocking
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-- What messages should be logged. The following includes all messages when
-- in development, and warnings and errors in production.
shouldLog app _source level =
appShouldLogAll (appSettings app)
|| level == LevelWarn
|| level == LevelError
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makeLogger = return . appLogger
-- How to run database actions.
instance YesodPersist App where
type YesodPersistBackend App = SqlBackend
runDB action = do
master <- getYesod
runSqlPool action $ appConnPool master
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instance YesodPersistRunner App where
getDBRunner = defaultGetDBRunner appConnPool
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-- instance YesodAuth App where
-- type AuthId App = UserId
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-- Where to send a user after successful login
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-- loginDest _ = HomeR
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-- Where to send a user after logout
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-- logoutDest _ = HomeR
-- getAuthId creds = runDB $ do
-- x <- getBy $ UniqueUser $ credsIdent creds
-- case x of
-- Just (Entity uid _) -> return $ Just uid
-- Nothing -> do
-- fmap Just $ insert User
-- { userIdent = credsIdent creds
-- , userPassword = Nothing
-- }
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-- You can add other plugins like BrowserID, email or OAuth here
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-- authPlugins _ = [authBrowserId def]
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-- authHttpManager = httpManager
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-- This instance is required to use forms. You can modify renderMessage to
-- achieve customized and internationalized form validation messages.
instance RenderMessage App FormMessage where
renderMessage _ _ = defaultFormMessage
-- | Get the 'Extra' value, used to hold data from the settings.yml file.
-- getExtra :: Handler Extra
-- getExtra = fmap (appExtra . settings) getYesod
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-- Note: previous versions of the scaffolding included a deliver function to
-- send emails. Unfortunately, there are too many different options for us to
-- give a reasonable default. Instead, the information is available on the
-- wiki:
--
-- https://github.com/yesodweb/yesod/wiki/Sending-email