mirror of
https://github.com/facebook/duckling.git
synced 2024-10-27 14:26:54 +03:00
924516103b
Summary: it doesn't take .cabal into account Reviewed By: patapizza Differential Revision: D4938400 fbshipit-source-id: 8bc99a5
61 lines
1.8 KiB
Haskell
61 lines
1.8 KiB
Haskell
-- Copyright (c) 2016-present, Facebook, Inc.
|
|
-- All rights reserved.
|
|
--
|
|
-- This source code is licensed under the BSD-style license found in the
|
|
-- LICENSE file in the root directory of this source tree. An additional grant
|
|
-- of patent rights can be found in the PATENTS file in the same directory.
|
|
|
|
|
|
{-# LANGUAGE FlexibleContexts #-}
|
|
{-# LANGUAGE TypeFamilies #-}
|
|
|
|
module Duckling.Resolve
|
|
( Context(..)
|
|
, DucklingTime(..)
|
|
, Resolve(..)
|
|
, fromUTC
|
|
, fromZonedTime
|
|
, toUTC
|
|
) where
|
|
|
|
import Data.Aeson
|
|
import Data.String
|
|
import qualified Data.Time as Time
|
|
import qualified Data.Time.LocalTime.TimeZone.Series as Series
|
|
import Prelude
|
|
|
|
import Duckling.Lang
|
|
|
|
-- | Internal time reference.
|
|
-- We work as if we were in UTC time and use `ZoneSeriesTime` to house the info.
|
|
-- We convert to local time at resolution, using `fromUTC`.
|
|
newtype DucklingTime = DucklingTime Series.ZoneSeriesTime
|
|
deriving (Eq, Show)
|
|
|
|
data Context = Context
|
|
{ referenceTime :: DucklingTime
|
|
, lang :: Lang
|
|
}
|
|
deriving (Eq, Show)
|
|
|
|
class ToJSON (ResolvedValue a) => Resolve a where
|
|
type ResolvedValue a
|
|
resolve :: Context -> a -> Maybe (ResolvedValue a)
|
|
|
|
fromZonedTime :: Time.ZonedTime -> DucklingTime
|
|
fromZonedTime (Time.ZonedTime localTime timeZone) = DucklingTime $
|
|
Series.ZoneSeriesTime (toUTC localTime) (Series.TimeZoneSeries timeZone [])
|
|
|
|
-- | Given a UTCTime and an TimeZone, build a ZonedTime (no conversion)
|
|
fromUTC :: Time.UTCTime -> Time.TimeZone -> Time.ZonedTime
|
|
fromUTC (Time.UTCTime day diffTime) timeZone = Time.ZonedTime localTime timeZone
|
|
where
|
|
localTime = Time.LocalTime day timeOfDay
|
|
timeOfDay = Time.timeToTimeOfDay diffTime
|
|
|
|
-- | Given a LocalTime, build a UTCTime (no conversion)
|
|
toUTC :: Time.LocalTime -> Time.UTCTime
|
|
toUTC (Time.LocalTime day timeOfDay) = Time.UTCTime day diffTime
|
|
where
|
|
diffTime = Time.timeOfDayToTime timeOfDay
|