640 lines
22 KiB
Haskell
640 lines
22 KiB
Haskell
{-# LANGUAGE CPP, TypeFamilies, QuasiQuotes, TemplateHaskell #-}
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{-|
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A web-based UI.
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-}
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module Hledger.Cli.Commands.Web
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where
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import Control.Concurrent (forkIO, threadDelay)
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import Control.Applicative ((<$>), (<*>))
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import Data.Either
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import System.FilePath ((</>))
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import System.IO.Storage (withStore, putValue, getValue)
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import Text.ParserCombinators.Parsec (parse)
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import Yesod
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import Hledger.Cli.Commands.Add (journalAddTransaction)
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import Hledger.Cli.Commands.Balance
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import Hledger.Cli.Commands.Print
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import Hledger.Cli.Commands.Register
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import Hledger.Cli.Options hiding (value)
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import Hledger.Cli.Utils
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import Hledger.Cli.Version (version)
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import Hledger.Data
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import Hledger.Read (journalFromPathAndString)
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import Hledger.Read.Journal (someamount)
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#ifdef MAKE
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import Paths_hledger_make (getDataFileName)
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#else
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import Paths_hledger (getDataFileName)
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#endif
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defhost = "localhost"
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defport = 5000
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defbaseurl = printf "http://%s:%d" defhost defport :: String
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browserstartdelay = 100000 -- microseconds
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hledgerurl = "http://hledger.org"
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manualurl = hledgerurl++"/MANUAL.html"
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data HledgerWebApp = HledgerWebApp {
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appRoot :: String
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,appWebdir :: FilePath
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,appOpts :: [Opt]
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,appArgs :: [String]
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,appJournal :: Journal
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}
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mkYesod "HledgerWebApp" [$parseRoutes|
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/ IndexPage GET
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/journal JournalPage GET POST
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/register RegisterPage GET
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/balance BalancePage GET
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/ledger LedgerPage GET
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/style.css StyleCss GET
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|]
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instance Yesod HledgerWebApp where approot = appRoot
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-- defaultroute = LedgerPage
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defaultroute = JournalPage
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-- | A bundle of useful data passed to templates.
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data TemplateData = TD {
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here :: HledgerWebAppRoute -- ^ the current page's route
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,title :: String -- ^ page's title
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,msg :: Maybe (Html ()) -- ^ transient message
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,a :: String -- ^ a (filter pattern) parameter
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,p :: String -- ^ p (period expression) parameter
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}
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mktd = TD {
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here = IndexPage
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,title = "hledger"
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,msg = Nothing
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,a = ""
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,p = ""
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}
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-- | The web command.
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web :: [Opt] -> [String] -> Journal -> IO ()
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web opts args j = do
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let baseurl = fromMaybe defbaseurl $ baseUrlFromOpts opts
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port = fromMaybe defport $ portFromOpts opts
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unless (Debug `elem` opts) $ forkIO (browser baseurl) >> return ()
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server baseurl port opts args j
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browser :: String -> IO ()
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browser baseurl = do
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putStrLn "starting web browser"
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threadDelay browserstartdelay
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openBrowserOn baseurl
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return ()
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server :: String -> Int -> [Opt] -> [String] -> Journal -> IO ()
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server baseurl port opts args j = do
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printf "starting web server on port %d with base url %s\n" port baseurl
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fp <- getDataFileName "web"
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let app = HledgerWebApp{
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appRoot=baseurl
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,appWebdir=fp
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,appOpts=opts
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,appArgs=args
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,appJournal=j
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}
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withStore "hledger" $ do
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putValue "hledger" "journal" j
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basicHandler' port Nothing app
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----------------------------------------------------------------------
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-- handlers & templates
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getStyleCss :: Handler HledgerWebApp ()
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getStyleCss = do
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app <- getYesod
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let dir = appWebdir app
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sendFile "text/css" $ dir </> "style.css"
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getIndexPage :: Handler HledgerWebApp ()
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getIndexPage = redirect RedirectTemporary defaultroute
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----------------------------------------------------------------------
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-- | A basic journal view, like hledger print, with editing.
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getJournalPage :: Handler HledgerWebApp RepHtml
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getJournalPage = do
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(a, p, opts, fspec, j, msg, here) <- getHandlerParameters
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let td = mktd{here=here, title="hledger", msg=msg, a=a, p=p}
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editform' = editform td $ jtext j
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txns = journalReportAsHtml opts td $ journalReport opts fspec j
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hamletToRepHtml $ pageLayout td [$hamlet|
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%div.journal
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^journalScripts^
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%div.nav2
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%a#addformlink!href!onclick="return addformToggle()" add one transaction
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\ | $
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%a#editformlink!href!onclick="return editformToggle()" edit the whole journal
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^addform^
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^editform'^
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#transactions ^txns^
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|]
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-- | Render a journal report as HTML.
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journalReportAsHtml :: [Opt] -> TemplateData -> JournalReport -> Hamlet HledgerWebAppRoute
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journalReportAsHtml _ td items = [$hamlet|
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%table.journalreport
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$forall number.items i
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^itemAsHtml' i^
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|]
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where
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number = zip [1..]
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itemAsHtml' = itemAsHtml td
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itemAsHtml :: TemplateData -> (Int, JournalReportItem) -> Hamlet HledgerWebAppRoute
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itemAsHtml _ (n, t) = [$hamlet|
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%tr.item.$evenodd$
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%td.transaction
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%pre $txn$
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|] where
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evenodd = if even n then "even" else "odd"
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txn = trimnl $ showTransaction t where trimnl = reverse . dropWhile (=='\n') . reverse
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journalScripts = [$hamlet|
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<script type="text/javascript">
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function addformToggle() {
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a = document.getElementById('addform');
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e = document.getElementById('editform');
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t = document.getElementById('transactions');
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alink = document.getElementById('addformlink');
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elink = document.getElementById('editformlink');
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if (a.style.display == 'none') {
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alink.style['font-weight'] = 'bold';
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elink.style['font-weight'] = 'normal';
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a.style.display = 'block';
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e.style.display = 'none';
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t.style.display = 'block';
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} else {
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alink.style['font-weight'] = 'normal';
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elink.style['font-weight'] = 'normal';
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a.style.display = 'none';
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e.style.display = 'none';
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t.style.display = 'block';
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}
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return false;
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}
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function editformToggle() {
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a = document.getElementById('addform');
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e = document.getElementById('editform');
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t = document.getElementById('transactions');
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alink = document.getElementById('addformlink');
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elink = document.getElementById('editformlink');
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if (e.style.display == 'none') {
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alink.style['font-weight'] = 'normal';
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elink.style['font-weight'] = 'bold';
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a.style.display = 'none';
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e.style.display = 'block';
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t.style.display = 'none';
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} else {
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alink.style['font-weight'] = 'normal';
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elink.style['font-weight'] = 'normal';
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a.style.display = 'none';
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e.style.display = 'none';
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t.style.display = 'block';
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}
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return false;
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}
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</script>
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|]
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postJournalPage :: Handler HledgerWebApp RepPlain
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postJournalPage = do
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edit <- runFormPost' $ maybeStringInput "edit"
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if isJust edit then postEditForm else postAddForm
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-- | Handle a journal add form post.
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postAddForm :: Handler HledgerWebApp RepPlain
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postAddForm = do
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(_, _, opts, _, _, _, _) <- getHandlerParameters
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today <- liftIO getCurrentDay
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-- get form input values. M means a Maybe value.
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(dateM, descM, acct1M, amt1M, acct2M, amt2M) <- runFormPost'
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$ (,,,,,)
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<$> maybeStringInput "date"
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<*> maybeStringInput "description"
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<*> maybeStringInput "accountname1"
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<*> maybeStringInput "amount1"
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<*> maybeStringInput "accountname2"
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<*> maybeStringInput "amount2"
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-- supply defaults and parse date and amounts, or get errors.
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let dateE = maybe (Left "date required") (either (\e -> Left $ showDateParseError e) Right . fixSmartDateStrEither today) dateM
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descE = Right $ fromMaybe "" descM
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acct1E = maybe (Left "to account required") Right acct1M
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acct2E = maybe (Left "from account required") Right acct2M
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amt1E = maybe (Left "amount required") (either (const $ Left "could not parse amount") Right . parse someamount "") amt1M
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amt2E = maybe (Right missingamt) (either (const $ Left "could not parse amount") Right . parse someamount "") amt2M
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strEs = [dateE, descE, acct1E, acct2E]
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amtEs = [amt1E, amt2E]
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[date,desc,acct1,acct2] = rights strEs
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[amt1,amt2] = rights amtEs
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errs = lefts strEs ++ lefts amtEs
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-- if no errors so far, generate a transaction and balance it or get the error.
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tE | not $ null errs = Left errs
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| otherwise = either (\e -> Left ["unbalanced postings: " ++ (head $ lines e)]) Right
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(balanceTransaction $ nulltransaction {
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tdate=parsedate date
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,teffectivedate=Nothing
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,tstatus=False
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,tcode=""
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,tdescription=desc
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,tcomment=""
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,tpostings=[
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Posting False acct1 amt1 "" RegularPosting Nothing
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,Posting False acct2 amt2 "" RegularPosting Nothing
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]
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,tpreceding_comment_lines=""
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})
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-- display errors or add transaction
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case tE of
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Left errs -> do
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-- save current form values in session
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setMessage $ string $ intercalate "; " errs
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redirect RedirectTemporary JournalPage
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Right t -> do
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let t' = txnTieKnot t -- XXX move into balanceTransaction
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j <- liftIO $ fromJust `fmap` getValue "hledger" "journal"
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liftIO $ journalAddTransaction j opts t'
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setMessage $ string $ printf "Added transaction:\n%s" (show t')
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redirect RedirectTemporary JournalPage
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-- | Handle a journal edit form post.
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postEditForm :: Handler HledgerWebApp RepPlain
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postEditForm = do
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-- get form input values, or basic validation errors. E means an Either value.
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textM <- runFormPost' $ maybeStringInput "text"
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let textE = maybe (Left "No value provided") Right textM
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-- display errors or add transaction
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case textE of
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Left errs -> do
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-- XXX should save current form values in session
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setMessage $ string errs
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redirect RedirectTemporary JournalPage
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Right t' -> do
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-- try to avoid unnecessary backups or saving invalid data
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j <- liftIO $ fromJust `fmap` getValue "hledger" "journal"
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filechanged' <- liftIO $ journalFileIsNewer j
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let f = filepath j
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told = jtext j
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tnew = filter (/= '\r') t'
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changed = tnew /= told || filechanged'
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-- changed <- liftIO $ writeFileWithBackupIfChanged f t''
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if not changed
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then do
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setMessage $ string $ "No change"
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redirect RedirectTemporary JournalPage
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else do
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jE <- liftIO $ journalFromPathAndString Nothing f tnew
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either
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(\e -> do
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setMessage $ string e
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redirect RedirectTemporary JournalPage)
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(const $ do
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liftIO $ writeFileWithBackup f tnew
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setMessage $ string $ printf "Saved journal %s\n" (show f)
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redirect RedirectTemporary JournalPage)
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jE
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addform :: Hamlet HledgerWebAppRoute
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addform = [$hamlet|
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%form#addform!method=POST!style=display:none;
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%table.form!cellpadding=0!cellspacing=0!border=0
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%tr
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%td!colspan=4
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%table!cellpadding=0!cellspacing=0!border=0
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%tr#descriptionrow
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%td
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Date:
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%td
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%input!size=15!name=date!value=$date$
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%td
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Description:
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%td
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%input!size=35!name=description!value=$desc$
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%tr.helprow
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%td
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%td
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.help $datehelp$ ^datehelplink^ $
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%td
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%td
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.help $deschelp$
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^transactionfields1^
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^transactionfields2^
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%tr#addbuttonrow
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%td!colspan=4
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%input!type=hidden!name=add!value=1
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%input!type=submit!name=submit!value="add transaction"
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|]
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where
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datehelplink = helplink "dates" "..."
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datehelp = "eg: 7/20, 2010/1/1, "
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deschelp = "eg: supermarket (optional)"
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date = "today"
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desc = ""
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transactionfields1 = transactionfields 1
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transactionfields2 = transactionfields 2
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transactionfields :: Int -> Hamlet HledgerWebAppRoute
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transactionfields n = [$hamlet|
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%tr#postingrow
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%td!align=right
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$label$:
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%td
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%input!size=35!name=$acctvar$!value=$acct$
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^amtfield^
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%tr.helprow
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%td
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%td
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.help $accthelp$
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%td
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%td
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.help $amthelp$
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|]
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where
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label | n == 1 = "To account"
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| otherwise = "From account"
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accthelp | n == 1 = "eg: expenses:food"
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| otherwise = "eg: assets:bank:checking"
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amtfield | n == 1 = [$hamlet|
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%td
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Amount:
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%td
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%input!size=15!name=$amtvar$!value=$amt$
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|]
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| otherwise = nulltemplate
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amthelp | n == 1 = "eg: 5, $6, €7.01"
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| otherwise = ""
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acct = ""
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amt = ""
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numbered = (++ show n)
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acctvar = numbered "accountname"
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amtvar = numbered "amount"
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editform :: TemplateData -> String -> Hamlet HledgerWebAppRoute
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editform _ content = [$hamlet|
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%form#editform!method=POST!style=display:none;
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%table.form#editform!cellpadding=0!cellspacing=0!border=0
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%tr
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%td!colspan=2
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%textarea!name=text!rows=30!cols=80
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$content$
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%tr#addbuttonrow
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%td
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%span.help ^formathelp^
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%td!align=right
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%span.help Are you sure ? This will overwrite the journal. $
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%input!type=hidden!name=edit!value=1
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%input!type=submit!name=submit!value="save journal"
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\ or $
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%a!href!onclick="return editformToggle()" cancel
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|]
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where
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formathelp = helplink "file-format" "file format help"
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----------------------------------------------------------------------
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-- | A combined accounts and postings view, like hledger balance + hledger register.
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getLedgerPage :: Handler HledgerWebApp RepHtml
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getLedgerPage = do
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(a, p, opts, fspec, j, msg, here) <- getHandlerParameters
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-- in this view, balance report is filtered only by period, not account/description filters
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app <- getYesod
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t <- liftIO $ getCurrentLocalTime
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let args = appArgs app
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fspec' = optsToFilterSpec opts args t
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br = balanceReportAsHtml opts td $ balanceReport opts fspec' j
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rr = registerReportAsHtml opts td $ registerReport opts fspec j
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td = mktd{here=here, title="hledger", msg=msg, a=a, p=p}
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hamletToRepHtml $ pageLayout td [$hamlet|
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%div.ledger
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%div.accounts!style=float:left; ^br^
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%div.register ^rr^
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|]
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----------------------------------------------------------------------
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-- | An accounts and balances view, like hledger balance.
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getBalancePage :: Handler HledgerWebApp RepHtml
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getBalancePage = do
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(a, p, opts, fspec, j, msg, here) <- getHandlerParameters
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let td = mktd{here=here, title="hledger", msg=msg, a=a, p=p}
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hamletToRepHtml $ pageLayout td $ balanceReportAsHtml opts td $ balanceReport opts fspec j
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-- | Render a balance report as HTML.
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balanceReportAsHtml :: [Opt] -> TemplateData -> BalanceReport -> Hamlet HledgerWebAppRoute
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balanceReportAsHtml _ td (items,total) = [$hamlet|
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%table.balancereport
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$forall items i
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^itemAsHtml' i^
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%tr.totalrule
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%td!colspan=2
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%tr
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%td
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%td!align=right $mixedAmountAsHtml.total$
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|]
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where
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itemAsHtml' = itemAsHtml td
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itemAsHtml :: TemplateData -> BalanceReportItem -> Hamlet HledgerWebAppRoute
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itemAsHtml TD{a=a,p=p} (acct, adisplay, adepth, abal) = [$hamlet|
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%tr.item.$current$
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%td.account
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$indent$
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%a!href=$aurl$ $adisplay$
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%td.balance!align=right $mixedAmountAsHtml.abal$
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|] where
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current = if not (null a) && containsRegex a acct then "current" else ""
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indent = preEscapedString $ concat $ replicate (2 * adepth) " "
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aurl = printf "../ledger?a=%s%s" (accountMatchingRegex acct) p' :: String
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p' = if null p then "" else printf "&p=%s" p
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accountMatchingRegex :: String -> String
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accountMatchingRegex = printf "^%s(:|$)"
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----------------------------------------------------------------------
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-- | A postings view, like hledger register.
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getRegisterPage :: Handler HledgerWebApp RepHtml
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getRegisterPage = do
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(a, p, opts, fspec, j, msg, here) <- getHandlerParameters
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let td = mktd{here=here, title="hledger", msg=msg, a=a, p=p}
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hamletToRepHtml $ pageLayout td $ registerReportAsHtml opts td $ registerReport opts fspec j
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-- | Render a register report as HTML.
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registerReportAsHtml :: [Opt] -> TemplateData -> RegisterReport -> Hamlet HledgerWebAppRoute
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registerReportAsHtml _ td items = [$hamlet|
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%table.registerreport
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$forall number.items i
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^itemAsHtml' i^
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|]
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where
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number = zip [1..]
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itemAsHtml' = itemAsHtml td
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itemAsHtml :: TemplateData -> (Int, RegisterReportItem) -> Hamlet HledgerWebAppRoute
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itemAsHtml TD{p=p} (n, (ds, posting, b)) = [$hamlet|
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%tr.item.$evenodd$.$firstposting$
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%td.date $date$
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%td.description $desc$
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%td.account
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%a!href=$aurl$ $acct$
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%td.amount!align=right $mixedAmountAsHtml.pamount.posting$
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%td.balance!align=right $mixedAmountAsHtml.b$
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|] where
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evenodd = if even n then "even" else "odd"
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(firstposting, date, desc) = case ds of Just (da, de) -> ("firstposting", show da, de)
|
|
Nothing -> ("", "", "")
|
|
acct = paccount posting
|
|
aurl = printf "../ledger?a=%s%s" (accountMatchingRegex acct) p' :: String
|
|
p' = if null p then "" else printf "&p=%s" p
|
|
|
|
--mixedAmountAsHtml = intercalate ", " . lines . show
|
|
mixedAmountAsHtml = preEscapedString . intercalate "<br>" . lines . show
|
|
|
|
----------------------------------------------------------------------
|
|
|
|
-- | A standalone journal edit form page.
|
|
getEditPage :: Handler HledgerWebApp RepHtml
|
|
getEditPage = do
|
|
(a, p, _, _, _, msg, here) <- getHandlerParameters
|
|
-- reload journal's text without parsing, if changed
|
|
j <- liftIO $ fromJust `fmap` getValue "hledger" "journal"
|
|
changed <- liftIO $ journalFileIsNewer j
|
|
s <- liftIO $ if changed then readFile (filepath j) else return (jtext j) -- XXX readFile may throw an error
|
|
let td = mktd{here=here, title="hledger", msg=msg, a=a, p=p}
|
|
hamletToRepHtml $ pageLayout td $ editform td s
|
|
|
|
----------------------------------------------------------------------
|
|
|
|
-- | Gather all the stuff we want for a typical hledger web request handler.
|
|
getHandlerParameters :: Handler HledgerWebApp
|
|
(String, String, [Opt], FilterSpec, Journal, Maybe (Html ()), HledgerWebAppRoute)
|
|
getHandlerParameters = do
|
|
Just here <- getCurrentRoute
|
|
(a, p, opts, fspec) <- getReportParameters
|
|
(j, err) <- getLatestJournal opts
|
|
msg <- getMessage' err
|
|
return (a, p, opts, fspec, j, msg, here)
|
|
where
|
|
-- | Get current report parameters for this request.
|
|
getReportParameters :: Handler HledgerWebApp (String, String, [Opt], FilterSpec)
|
|
getReportParameters = do
|
|
app <- getYesod
|
|
t <- liftIO $ getCurrentLocalTime
|
|
a <- fromMaybe "" <$> lookupGetParam "a"
|
|
p <- fromMaybe "" <$> lookupGetParam "p"
|
|
let opts = appOpts app ++ [Period p]
|
|
args = appArgs app ++ [a]
|
|
fspec = optsToFilterSpec opts args t
|
|
return (a, p, opts, fspec)
|
|
|
|
-- | Update our copy of the journal if the file changed. If there is an
|
|
-- error while reloading, keep the old one and return the error, and set a
|
|
-- ui message.
|
|
getLatestJournal :: [Opt] -> Handler HledgerWebApp (Journal, Maybe String)
|
|
getLatestJournal opts = do
|
|
j <- liftIO $ fromJust `fmap` getValue "hledger" "journal"
|
|
(jE, changed) <- liftIO $ journalReloadIfChanged opts j
|
|
if not changed
|
|
then return (j,Nothing)
|
|
else case jE of
|
|
Right j' -> do liftIO $ putValue "hledger" "journal" j'
|
|
return (j',Nothing)
|
|
Left e -> do setMessage $ string "error while reading" {- ++ ": " ++ e-}
|
|
return (j, Just e)
|
|
|
|
-- | Helper to work around a yesod feature (can't set and get a message in the same request.)
|
|
getMessage' :: Maybe String -> Handler HledgerWebApp (Maybe (Html ()))
|
|
getMessage' newmsgstr = do
|
|
oldmsg <- getMessage
|
|
return $ maybe oldmsg (Just . string) newmsgstr
|
|
|
|
pageLayout :: TemplateData -> Hamlet HledgerWebAppRoute -> Hamlet HledgerWebAppRoute
|
|
pageLayout td@TD{title=title, msg=msg} content = [$hamlet|
|
|
!!!
|
|
%html
|
|
%head
|
|
%title $title$
|
|
%meta!http-equiv=Content-Type!content=$metacontent$
|
|
%link!rel=stylesheet!type=text/css!href=@StyleCss@!media=all
|
|
%body
|
|
^navbar.td^
|
|
#messages $m$
|
|
#content
|
|
^content^
|
|
|]
|
|
where m = fromMaybe (string "") msg
|
|
metacontent = "text/html; charset=utf-8"
|
|
|
|
navbar :: TemplateData -> Hamlet HledgerWebAppRoute
|
|
navbar td = [$hamlet|
|
|
#navbar
|
|
%a.toprightlink!href=$hledgerurl$ hledger $version$
|
|
\ $
|
|
%a.toprightlink!href=$manualurl$ manual
|
|
\ $
|
|
^navlinks.td^
|
|
^filterform.td^
|
|
|]
|
|
|
|
navlinks :: TemplateData -> Hamlet HledgerWebAppRoute
|
|
navlinks td = [$hamlet|
|
|
#navlinks
|
|
^journallink^ $
|
|
| ^ledgerlink^ $
|
|
|]
|
|
where
|
|
journallink = navlink td "journal" JournalPage
|
|
ledgerlink = navlink td "ledger" LedgerPage
|
|
-- | ^balancelink^ $
|
|
-- | ^registerlink^ $
|
|
-- balancelink = navlink td "balance" BalancePage
|
|
-- registerlink = navlink td "register" RegisterPage
|
|
|
|
navlink :: TemplateData -> String -> HledgerWebAppRoute -> Hamlet HledgerWebAppRoute
|
|
navlink TD{here=here,a=a,p=p} s dest = [$hamlet|%a.$style$!href=@?u@ $s$|]
|
|
where u = (dest, concat [(if null a then [] else [("a", a)])
|
|
,(if null p then [] else [("p", p)])])
|
|
style | dest == here = "navlinkcurrent"
|
|
| otherwise = "navlink"
|
|
|
|
filterform :: TemplateData -> Hamlet HledgerWebAppRoute
|
|
filterform TD{here=here,a=a,p=p} = [$hamlet|
|
|
%form#filterform.$filtering$!method=GET
|
|
%span!style=white-space:nowrap;
|
|
^filterformlabel^ $
|
|
%input!name=a!size=30!value=$a$
|
|
^ahelp^ $
|
|
in period: $
|
|
%input!name=p!size=30!value=$p$
|
|
^phelp^ $
|
|
%input!type=submit!value=filter
|
|
|]
|
|
where
|
|
ahelp = helplink "filter-patterns" "?"
|
|
phelp = helplink "period-expressions" "?"
|
|
(filtering, filterformlabel)
|
|
| null a && null p = ("", [$hamlet|filter by: $|])
|
|
| otherwise = ("filtering", [$hamlet|
|
|
%a#stopfilterlink!href=@here@ stop filtering
|
|
\ $
|
|
by $
|
|
|])
|
|
|
|
helplink :: String -> String -> Hamlet HledgerWebAppRoute
|
|
helplink topic label = [$hamlet|%a!href=$u$!target=hledgerhelp $label$|]
|
|
where u = manualurl ++ if null topic then "" else '#':topic
|
|
|
|
nulltemplate = [$hamlet||]
|
|
|