src/Gargantext/Text/Corpus/Parsers/Date.hs

   1 {-|
   2 Module      : Gargantext.Text.Corpus.Parsers.Date
   3 Description : Some utils to parse dates
   4 Copyright   : (c) CNRS 2017-present
   5 License     : AGPL + CECILL v3
   6 Maintainer  : team@gargantext.org
   7 Stability   : experimental
   8 Portability : POSIX
   9
  10 According to the language of the text, parseDateRaw returns date as Text:
  11
  12 TODO : Add some tests
  13 import Gargantext.Text.Corpus.Parsers.Date as DGP
  14 DGP.parseDateRaw DGP.FR "12 avril 2010" == "2010-04-12T00:00:00.000+00:00"
  15 -}
  16
  17 {-# LANGUAGE FlexibleContexts  #-}
  18 {-# LANGUAGE NoImplicitPrelude #-}
  19 {-# LANGUAGE OverloadedStrings #-}
  20
  21 module Gargantext.Text.Corpus.Parsers.Date (parse, parseRaw, dateSplit, Year, Month, Day) where
  22
  23 import Data.HashMap.Strict as HM hiding (map)
  24 import Data.Text (Text, unpack, splitOn, pack)
  25 import Data.Time (parseTimeOrError, defaultTimeLocale, toGregorian)
  26 import Data.Time.Clock (UTCTime(..), getCurrentTime)
  27 import Data.Time.LocalTime (utc)
  28 import Data.Time.LocalTime.TimeZone.Series (zonedTimeToZoneSeriesTime)
  29 import Duckling.Api (analyze)
  30 import Duckling.Core (makeLocale, Some(This), Dimension(Time))
  31 import Duckling.Resolve (fromUTC, Context(Context, referenceTime, locale), DucklingTime(DucklingTime))
  32 import Duckling.Types (ResolvedToken)
  33 import Duckling.Types (jsonValue)
  34 import Gargantext.Core (Lang(FR,EN))
  35 import Gargantext.Prelude
  36 import qualified Data.Aeson   as Json
  37 import qualified Data.HashSet as HashSet
  38 import qualified Duckling.Core as DC
  39
  40 ------------------------------------------------------------------------
  41 -- | Parse date to Ints
  42 -- TODO add hours, minutes and seconds
  43 dateSplit :: Lang -> Maybe Text -> IO (Maybe UTCTime, (Maybe Year, Maybe Month, Maybe Day))
  44 dateSplit _ Nothing    = pure (Nothing, (Nothing, Nothing, Nothing))
  45 dateSplit l (Just txt) = do
  46   utcTime <- parse l txt
  47   let (y, m, d) = split' utcTime
  48   pure (Just utcTime, (Just y, Just m,Just d))
  49
  50 split' :: UTCTime -> (Year, Month, Day)
  51 split' utcTime = (fromIntegral y, m, d)
  52   where
  53     (UTCTime day _) = utcTime
  54     (y,m,d)         = toGregorian day
  55
  56 type Year  = Int
  57 type Month = Int
  58 type Day   = Int
  59 ------------------------------------------------------------------------
  60
  61 -- | Date Parser
  62 -- Parses dates mentions in full text given the language.
  63 -- >>> parseDate FR (pack "10 avril 1979 à 19H")
  64 -- 1979-04-10 19:00:00 UTC
  65 -- >>> parseDate EN (pack "April 10 1979")
  66 -- 1979-04-10 00:00:00 UTC
  67 parse :: Lang -> Text -> IO UTCTime
  68 parse lang s = parseDate' "%Y-%m-%dT%T" "0-0-0T0:0:0" lang s
  69
  70 type DateFormat  = Text
  71 type DateDefault = Text
  72
  73 parseDate' :: DateFormat -> DateDefault -> Lang -> Text -> IO UTCTime
  74 parseDate' format def lang s = do
  75   dateStr' <- parseRaw lang s
  76   let dateStr = unpack $ maybe def identity
  77                        $ head $ splitOn "." dateStr'
  78   pure $ parseTimeOrError True defaultTimeLocale (unpack format) dateStr
  79
  80
  81 -- TODO add Paris at Duckling.Locale Region datatype
  82 -- | To get Homogeinity of the languages
  83 --   TODO : put this in a more generic place in the source code
  84 parserLang :: Lang -> DC.Lang
  85 parserLang FR = DC.FR
  86 parserLang EN = DC.EN
  87 -- parserLang _  = panic "not implemented"
  88
  89 -- | Final Date parser API
  90 -- IO can be avoided here:
  91 -- currentContext :: Lang -> IO Context
  92 -- currentContext lang = localContext lang <$> utcToDucklingTime <$> getCurrentTime
  93 -- parseRaw :: Context -> Text -> SomeErrorHandling Text
  94
  95 -- TODO error handling
  96 parseRaw :: Lang -> Text -> IO (Text)
  97 parseRaw lang text = do
  98     maybeJson <- map jsonValue <$> parseDateWithDuckling lang text
  99     case headMay maybeJson of
 100       Just (Json.Object object) -> case HM.lookup "value" object of
 101                                      Just (Json.String date) -> pure date
 102                                      Just _                  -> panic "ParseRaw ERROR: should be a json String"
 103                                      Nothing                 -> panic $ "ParseRaw ERROR: no date found" <> (pack . show) lang <> " " <> text
 104
 105       _                         -> panic $ "ParseRaw ERROR: type error" <> (pack . show) lang <> " " <> text
 106
 107
 108 -- | Current Time in DucklingTime format
 109 -- TODO : get local Time in a more generic way
 110 utcToDucklingTime :: UTCTime -> DucklingTime
 111 utcToDucklingTime time = DucklingTime . zonedTimeToZoneSeriesTime $ fromUTC time utc
 112
 113 -- | Local Context which depends on Lang and Time
 114 localContext :: Lang -> DucklingTime -> Context
 115 localContext lang dt = Context {referenceTime = dt, locale = makeLocale (parserLang lang) Nothing}
 116
 117 -- | Date parser with Duckling
 118 parseDateWithDuckling :: Lang -> Text -> IO [ResolvedToken]
 119 parseDateWithDuckling lang input = do
 120     contxt <- localContext lang <$> utcToDucklingTime <$> getCurrentTime
 121     --pure $ parseAndResolve (rulesFor (locale ctx) (HashSet.fromList [(This Time)])) input ctx
 122     pure $ analyze input contxt $ HashSet.fromList [(This Time)]
 123