duckling/Duckling/Core.hs
Bartosz Nitka 1a251d8e42 Use HashMap.lookupDefault
Summary: This is a small stylystic improvement.

Reviewed By: patapizza

Differential Revision: D4713463

fbshipit-source-id: 47720d3
2017-03-15 08:19:11 -07:00

57 lines
1.6 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 NoRebindableSyntax #-}
-- | Everything needed to run Duckling.
module Duckling.Core
( Context(..)
, Dimension(..)
, Entity(..)
, Lang(..)
, Some(..)
-- Duckling API
, parse
, supportedDimensions
-- Reference time builders
, currentReftime
, makeReftime
) where
import Data.HashMap.Strict (HashMap)
import qualified Data.HashMap.Strict as HashMap
import Data.Maybe
import Data.Text (Text)
import Data.Time
import Data.Time.LocalTime.TimeZone.Series
import Prelude
import Duckling.Api
import Duckling.Dimensions.Types
import Duckling.Lang
import Duckling.Resolve
import Duckling.Types
-- | Builds a `DucklingTime` for timezone `tz` at `utcTime`.
-- If no `series` found for `tz`, uses UTC.
makeReftime :: HashMap Text TimeZoneSeries -> Text -> UTCTime -> DucklingTime
makeReftime series tz utcTime = DucklingTime $ ZoneSeriesTime ducklingTime tzs
where
tzs = HashMap.lookupDefault (TimeZoneSeries utc []) tz series
ducklingTime = toUTC $ utcToLocalTime' tzs utcTime
-- | Builds a `DucklingTime` for timezone `tz` at current time.
-- If no `series` found for `tz`, uses UTC.
currentReftime :: HashMap Text TimeZoneSeries -> Text -> IO DucklingTime
currentReftime series tz = do
utcNow <- getCurrentTime
return $ makeReftime series tz utcNow