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{-
srem --- Timed reminders as notifications
Copyright (C) 2015 Sean Whitton
This file is part of srem.
srem is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
srem 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with srem. If not, see <http://www.gnu.org/licenses/>.
-}
import Control.Applicative ((<$>), (<*>))
import Control.Monad (mapM_)
import System.Environment (getArgs)
import Data.Time.Calendar
import Data.Time.LocalTime
import Types.Reminder
import Types.Reminder.CmdLine
import Utility.CmdLineRem (cmdLineReminder)
import Utility.EventCache
import Utility.Notify
doCron :: IO ()
doCron = do
purgeOldEventCaches
rems <- (++) <$> readEmacsEventCache <*> readManualEventCache
(h, m, _) <- localHMD
let nowRemsFilter r = getReminderHour r == h
&& getReminderMinute r == m
nowRems = filter nowRemsFilter rems
sendNotifications nowRems
appendUserReminder :: Reminder -> IO ()
appendUserReminder r = do
(h, m, d) <- localHMD
-- A reminder doesn't know which day the event is on. So we make
-- a dummy reminder for right now, and compare to the user's
-- input. If their reminder is for a time that's already passed
-- today, we save the reminder into tomorrow's cache.
-- This makes it impossible to set a reminder for more than one
-- day into the future ('cmdLineReminder' is a pure function and
-- doesn't know what day it is now). But the only way to express
-- a reminder for the day after tomorrow in srem's deliberately
-- simple command line input would be to write something like
-- @srem 1500m Go out to meet Tina@ which no user would want to
-- do.
-- The day after tomorrow is far enough in the future that an
-- appointment in Emacs Org-mode should be used instead of srem's
-- manual reminder input.
let dummyRem = makeReminder' h m (getReminderText r)
if maybe False (r <=) dummyRem
then appendManualEventCache r (addDays 1 d)
else appendManualEventCache r d
main = do
args <- getArgs
if length args == 1 && head args == "--cron"
then doCron
else if length args == 1 && head args == "--refresh-emacs"
then refreshEmacsEventCache
else cmdLineReminder args
>>= maybe (error "invalid input") appendUserReminder
localHMD :: IO (Hour, Minute, Day)
localHMD = do
localTime <- zonedTimeToLocalTime <$> getZonedTime
let time = localTimeOfDay localTime
d = localDay localTime
h = todHour time
m = todMin time
return (h, m, d)
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