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https://github.com/facebook/duckling.git
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ab0ad0256e
Summary: * Locales support for the library, following `<Lang>_<Region>` with ISO 639-1 code for `<Lang>` and ISO 3166-1 alpha-2 code for `<Region>` (#33) * `Locale` opaque type (composite of `Lang` and `Region`) with `makeLocale` smart constructor to only allow valid `(Lang, Region)` combinations * API: `Context`'s `lang` parameter has been replaced by `locale`, with optional `Region` and backward compatibility. * `Rules/<Lang>.hs` exposes - `langRules`: cross-locale rules for `<Lang>`, from `<Dimension>/<Lang>/Rules.hs` - `localeRules`: locale-specific rules, from `<Dimension>/<Lang>/<Region>/Rules.hs` - `defaultRules`: `langRules` + specific rules from select locales to ensure backward-compatibility * Corpus, tests & classifiers - 1 classifier per locale, with default classifier (`<Lang>_XX`) when no locale provided (backward-compatible) - Default classifiers are built on existing corpus - Locale classifiers are built on - `<Dimension>/<Lang>/Corpus.hs` exposes a common `corpus` to all locales of `<Lang>` - `<Dimension>/<Lang>/<Region>/Corpus.hs` exposes `allExamples`: a list of examples specific to the locale (following `<Dimension>/<Lang>/<Region>/Rules.hs`). - Locale classifiers use the language corpus extended with the locale examples as training set. - Locale examples need to use the same `Context` (i.e. reference time) as the language corpus. - For backward compatibility, `<Dimension>/<Lang>/Corpus.hs` can expose also `defaultCorpus`, which is `corpus` augmented with specific examples. This is controlled by `getDefaultCorpusForLang` in `Duckling.Ranking.Generate`. - Tests run against each classifier to make sure runtime works as expected. * MM/DD (en_US) vs DD/MM (en_GB) example to illustrate Reviewed By: JonCoens, blandinw Differential Revision: D6038096 fbshipit-source-id: f29c28d
116 lines
3.5 KiB
Haskell
116 lines
3.5 KiB
Haskell
-- Copyright (c) 2016-present, Facebook, Inc.
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-- All rights reserved.
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--
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-- This source code is licensed under the BSD-style license found in the
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-- LICENSE file in the root directory of this source tree. An additional grant
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-- of patent rights can be found in the PATENTS file in the same directory.
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{-# LANGUAGE OverloadedStrings #-}
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import Control.Applicative
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import Control.Arrow ((***))
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import Control.Monad (unless)
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import Control.Monad.IO.Class
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import Data.Aeson
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import Data.ByteString (ByteString)
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import Data.HashMap.Strict (HashMap)
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import Data.Maybe
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import Data.String
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import Data.Text (Text)
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import Data.Time.LocalTime.TimeZone.Series
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import Prelude
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import System.Directory
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import TextShow
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import Text.Read (readMaybe)
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import qualified Data.ByteString.Lazy as LBS
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import qualified Data.HashMap.Strict as HashMap
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import qualified Data.Text as Text
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import qualified Data.Text.Encoding as Text
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import Snap.Core
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import Snap.Http.Server
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import Duckling.Core
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import Duckling.Data.TimeZone
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createIfMissing :: FilePath -> IO ()
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createIfMissing f = do
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exists <- doesFileExist f
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unless exists $ writeFile f ""
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setupLogs :: IO ()
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setupLogs = do
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createDirectoryIfMissing False "log"
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createIfMissing "log/error.log"
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createIfMissing "log/access.log"
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main :: IO ()
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main = do
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setupLogs
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tzs <- loadTimeZoneSeries "/usr/share/zoneinfo/"
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quickHttpServe $
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ifTop (writeBS "quack!") <|>
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route
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[ ("targets", method GET targetsHandler)
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, ("parse", method POST $ parseHandler tzs)
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]
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-- | Return which languages have which dimensions
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targetsHandler :: Snap ()
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targetsHandler = do
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modifyResponse $ setHeader "Content-Type" "application/json"
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writeLBS $ encode $
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HashMap.fromList . map dimText $ HashMap.toList supportedDimensions
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where
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dimText :: (Lang, [Some Dimension]) -> (Text, [Text])
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dimText = (Text.toLower . showt) *** map (\(This d) -> toName d)
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-- | Parse some text into the given dimensions
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parseHandler :: HashMap Text TimeZoneSeries -> Snap ()
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parseHandler tzs = do
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modifyResponse $ setHeader "Content-Type" "application/json"
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t <- getPostParam "text"
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l <- getPostParam "lang"
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ds <- getPostParam "dims"
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tz <- getPostParam "tz"
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loc <- getPostParam "locale"
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case t of
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Nothing -> do
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modifyResponse $ setResponseStatus 422 "Bad Input"
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writeBS "Need a 'text' parameter to parse"
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Just tx -> do
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refTime <- liftIO $ currentReftime tzs $
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fromMaybe defaultTimeZone $ Text.decodeUtf8 <$> tz
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let
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context = Context
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{ referenceTime = refTime
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, locale = maybe (makeLocale (parseLang l) Nothing) parseLocale loc
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}
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dimParse = fromMaybe [] $ decode $ LBS.fromStrict $ fromMaybe "" ds
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dims = mapMaybe fromName dimParse
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parsedResult = parse (Text.decodeUtf8 tx) context dims
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writeLBS $ encode parsedResult
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where
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defaultLang = EN
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defaultLocale = makeLocale defaultLang Nothing
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defaultTimeZone = "America/Los_Angeles"
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parseLocale :: ByteString -> Locale
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parseLocale x = maybe defaultLocale (`makeLocale` mregion) mlang
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where
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(mlang, mregion) = case chunks of
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[a, b] -> (readMaybe a :: Maybe Lang, readMaybe b :: Maybe Region)
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_ -> (Nothing, Nothing)
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chunks = map Text.unpack . Text.split (== '_') . Text.toUpper
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$ Text.decodeUtf8 x
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parseLang :: Maybe ByteString -> Lang
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parseLang l = fromMaybe defaultLang $ l >>=
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readMaybe . Text.unpack . Text.toUpper . Text.decodeUtf8
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