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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/>.
-}
module Types.Reminder ( Reminder
, makeReminder
, makeReminder'
, getReminderHour
, getReminderMinute
, getReminderText
) where
type Hour = Int
type Minute = Int
data Reminder = Reminder { getReminderHour :: Hour
, getReminderMinute :: Minute
, getReminderText :: String}
deriving (Eq, Ord)
instance Show Reminder where
show (Reminder h m s) =
"reminder at " ++ niceTime h m ++ ": " ++ s
-- | Maybe makes a reminder for an event, prepending a human-readable
-- time to the event description.
makeReminder :: Hour -- ^ Clock hour-hand time of event
-> Minute -- ^ Clock minute-hand time of the event
-> String -- ^ Event description
-> Maybe Reminder -- ^ Maybe a reminder
makeReminder h m s = makeReminder' h m (niceTime h m ++ " " ++ s)
-- | Maybe makes a reminder for an event. Unlike 'makeReminder',
-- doesn't prepend anything to the event description.
makeReminder' :: Hour -- ^ Clock hour-hand time of event
-> Minute -- ^ Clock minute-hand time of the event
-> String -- ^ Event description
-> Maybe Reminder -- ^ Maybe a reminder
makeReminder' h m s = if h `elem` [0..23] && m `elem` [0..59]
then return $ Reminder h m s
else fail "invalid reminder"
niceTime :: Hour -> Minute -> String
niceTime h m = (show . to12Hour) h
++ ":" ++ (zeroPadTime . show) m
++ amPm h
zeroPadTime :: String -> String
zeroPadTime t = if length t < 2
then '0' : t
else t
to12Hour :: Int -> Int
to12Hour h = if h > 12
then h - 12
else h
amPm :: Int -> String
amPm h = if h > 12
then "pm"
else "am"
|
