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module Types.Reminder.CmdLine where
{-
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 Text.Regex.Posix ((=~))
data CmdLineRemType = RelativeCLRem | AbsoluteCLRem
deriving (Eq, Show, Ord, Bounded)
cmdLineRemType :: String -> Maybe CmdLineRemType
cmdLineRemType exp
| exp =~ relativeRegExp = Just RelativeCLRem
| exp =~ absoluteRegExp = Just AbsoluteCLRem
| otherwise = Nothing
where
relativeRegExp = "[0-9mh]+[mh]"
absoluteRegExp = "[0-9]{1,2}(:[0-9][0-9])?(am|pm)?"
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