-{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE
+ OverloadedStrings
+ , UnicodeSyntax
+ #-}
module Data.Time.HTTP.Common
( shortWeekDayName
, shortWeekDayNameP
, shortMonthName
, shortMonthNameP
+ , longMonthName
+ , longMonthNameP
+
, show2
, show4
, read2
, read4
+
+ , show4digitsTZ
+ , read4digitsTZ
+
+ , assertWeekDayIsGood
+ , assertGregorianDateIsGood
+ , assertTimeOfDayIsGood
+
+ , optionMaybe
)
where
-
+import Blaze.ByteString.Builder.ByteString as B
+import Blaze.Text.Int as BT
+import Control.Applicative
import Control.Monad
-import Text.Parsec
+import Data.Ascii (AsciiBuilder)
+import qualified Data.Ascii as A
+import Data.Attoparsec.Char8 as P
+import Data.Monoid.Unicode
+import Data.Fixed
+import Data.Time
+import Data.Time.Calendar.WeekDate
+import Prelude.Unicode
-shortWeekDayName :: Int -> String
+shortWeekDayName ∷ Num n ⇒ n → String
+{-# INLINEABLE shortWeekDayName #-}
shortWeekDayName 1 = "Mon"
shortWeekDayName 2 = "Tue"
shortWeekDayName 3 = "Wed"
shortWeekDayName 5 = "Fri"
shortWeekDayName 6 = "Sat"
shortWeekDayName 7 = "Sun"
-shortWeekDayName n = error ("shortWeekDayName: unknown day number: " ++ show n)
+shortWeekDayName n = error ("shortWeekDayName: invalid week day: " ⧺ show n)
-shortWeekDayNameP :: Stream s m Char => ParsecT s u m Int
+shortWeekDayNameP ∷ Num n ⇒ Parser n
+{-# INLINEABLE shortWeekDayNameP #-}
shortWeekDayNameP
- = choice [ string "Mon" >> return 1
+ = choice [ string "Mon" *> return 1
, char 'T'
- >> choice [ string "ue" >> return 2
- , string "hu" >> return 4
+ *> choice [ string "ue" *> return 2
+ , string "hu" *> return 4
]
- , string "Wed" >> return 3
- , string "Fri" >> return 5
+ , string "Wed" *> return 3
+ , string "Fri" *> return 5
, char 'S'
- >> choice [ string "at" >> return 6
- , string "un" >> return 7
+ *> choice [ string "at" *> return 6
+ , string "un" *> return 7
]
]
-longWeekDayName :: Int -> String
+longWeekDayName ∷ Num n ⇒ n → String
+{-# INLINEABLE longWeekDayName #-}
longWeekDayName 1 = "Monday"
longWeekDayName 2 = "Tuesday"
longWeekDayName 3 = "Wednesday"
longWeekDayName 5 = "Friday"
longWeekDayName 6 = "Saturday"
longWeekDayName 7 = "Sunday"
+longWeekDayName n = error ("longWeekDayName: invalid week day: " ⧺ show n)
-longWeekDayNameP :: Stream s m Char => ParsecT s u m Int
+longWeekDayNameP ∷ Num n ⇒ Parser n
+{-# INLINEABLE longWeekDayNameP #-}
longWeekDayNameP
- = choice [ string "Monday" >> return 1
+ = choice [ string "Monday" *> return 1
, char 'T'
- >> choice [ string "uesday" >> return 2
- , string "hursday" >> return 4
+ *> choice [ string "uesday" *> return 2
+ , string "hursday" *> return 4
]
- , string "Wednesday" >> return 3
- , string "Friday" >> return 5
+ , string "Wednesday" *> return 3
+ , string "Friday" *> return 5
, char 'S'
- >> choice [ string "aturday" >> return 6
- , string "unday" >> return 7
+ *> choice [ string "aturday" *> return 6
+ , string "unday" *> return 7
]
]
-shortMonthName :: Int -> String
+shortMonthName ∷ Num n ⇒ n → String
+{-# INLINEABLE shortMonthName #-}
shortMonthName 1 = "Jan"
shortMonthName 2 = "Feb"
shortMonthName 3 = "Mar"
shortMonthName 10 = "Oct"
shortMonthName 11 = "Nov"
shortMonthName 12 = "Dec"
-shortMonthName n = error ("shortMonthName: unknown month number: " ++ show n)
+shortMonthName n = error ("shortMonthName: invalid month: " ⧺ show n)
-shortMonthNameP :: Stream s m Char => ParsecT s u m Int
+shortMonthNameP ∷ Num n ⇒ Parser n
+{-# INLINEABLE shortMonthNameP #-}
shortMonthNameP
= choice [ char 'J'
- >> choice [ string "an" >> return 1
+ *> choice [ string "an" *> return 1
, char 'u'
- >> choice [ char 'n' >> return 6
- , char 'l' >> return 7
+ *> choice [ char 'n' *> return 6
+ , char 'l' *> return 7
]
]
- , string "Feb" >> return 2
+ , string "Feb" *> return 2
, string "Ma"
- >> choice [ char 'r' >> return 3
- , char 'y' >> return 5
+ *> choice [ char 'r' *> return 3
+ , char 'y' *> return 5
]
, char 'A'
- >> choice [ string "pr" >> return 4
- , string "ug" >> return 8
+ *> choice [ string "pr" *> return 4
+ , string "ug" *> return 8
]
- , string "Sep" >> return 9
- , string "Oct" >> return 10
- , string "Nov" >> return 11
- , string "Dec" >> return 12
+ , string "Sep" *> return 9
+ , string "Oct" *> return 10
+ , string "Nov" *> return 11
+ , string "Dec" *> return 12
]
-show4 :: Integral i => i -> String
-show4 i
- | i >= 0 && i < 10 = "000" ++ show i
- | i >= 0 && i < 100 = "00" ++ show i
- | i >= 0 && i < 1000 = "0" ++ show i
- | i >= 0 && i < 10000 = show i
- | otherwise = error ("show4: the integer i must satisfy 0 <= i < 10000: " ++ show i)
-
-show2 :: Integral i => i -> String
-show2 i
- | i >= 0 && i < 10 = "0" ++ show i
- | i >= 0 && i < 100 = show i
- | otherwise = error ("show2: the integer i must satisfy 0 <= i < 100: " ++ show i)
-
-read4 :: (Stream s m Char, Num n) => ParsecT s u m n
-read4 = do n1 <- digit'
- n2 <- digit'
- n3 <- digit'
- n4 <- digit'
+longMonthName ∷ Num n ⇒ n → String
+{-# INLINEABLE longMonthName #-}
+longMonthName 1 = "January"
+longMonthName 2 = "February"
+longMonthName 3 = "March"
+longMonthName 4 = "April"
+longMonthName 5 = "May"
+longMonthName 6 = "June"
+longMonthName 7 = "July"
+longMonthName 8 = "August"
+longMonthName 9 = "September"
+longMonthName 10 = "October"
+longMonthName 11 = "November"
+longMonthName 12 = "December"
+longMonthName n = error ("longMonthName: invalid month: " ⧺ show n)
+
+longMonthNameP ∷ Num n ⇒ Parser n
+{-# INLINEABLE longMonthNameP #-}
+longMonthNameP
+ = choice [ char 'J'
+ *> choice [ string "anuary" *> return 1
+ , char 'u'
+ *> choice [ string "ne" *> return 6
+ , string "ly" *> return 7
+ ]
+ ]
+ , string "February" *> return 2
+ , string "Ma"
+ *> choice [ string "rch" *> return 3
+ , char 'y' *> return 5
+ ]
+ , char 'A'
+ *> choice [ string "pril" *> return 4
+ , string "ugust" *> return 8
+ ]
+ , string "September" *> return 9
+ , string "October" *> return 10
+ , string "November" *> return 11
+ , string "December" *> return 12
+ ]
+
+show4 ∷ Integral i ⇒ i → AsciiBuilder
+{-# INLINE show4 #-}
+show4 = A.unsafeFromBuilder ∘ go
+ where
+ {-# INLINEABLE go #-}
+ go i | i ≥ 0 ∧ i < 10 = B.fromByteString "000" ⊕ BT.digit i
+ | i ≥ 0 ∧ i < 100 = B.fromByteString "00" ⊕ BT.integral i
+ | i ≥ 0 ∧ i < 1000 = B.fromByteString "0" ⊕ BT.integral i
+ | i ≥ 0 ∧ i < 10000 = BT.integral i
+ | otherwise = error ("show4: the integer i must satisfy 0 <= i < 10000: " ⧺ show i)
+
+show2 ∷ Integral i ⇒ i → AsciiBuilder
+{-# INLINE show2 #-}
+show2 = A.unsafeFromBuilder ∘ go
+ where
+ go i | i ≥ 0 ∧ i < 10 = B.fromByteString "0" ⊕ BT.digit i
+ | i ≥ 0 ∧ i < 100 = BT.integral i
+ | otherwise = error ("show2: the integer i must satisfy 0 <= i < 100: " ⧺ show i)
+
+read4 ∷ Num n ⇒ Parser n
+{-# INLINEABLE read4 #-}
+read4 = do n1 ← digit'
+ n2 ← digit'
+ n3 ← digit'
+ n4 ← digit'
return (n1 * 1000 + n2 * 100 + n3 * 10 + n4)
-read2 :: (Stream s m Char, Num n) => ParsecT s u m n
-read2 = do n1 <- digit'
- n2 <- digit'
+read2 ∷ Num n ⇒ Parser n
+{-# INLINEABLE read2 #-}
+read2 = do n1 ← digit'
+ n2 ← digit'
return (n1 * 10 + n2)
-digit' :: (Stream s m Char, Num n) => ParsecT s u m n
-digit' = liftM fromC digit
+digit' ∷ Num n ⇒ Parser n
+digit' = fromC <$> P.digit
-fromC :: Num n => Char -> n
+fromC ∷ Num n ⇒ Char → n
fromC '0' = 0
fromC '1' = 1
fromC '2' = 2
fromC '8' = 8
fromC '9' = 9
fromC _ = undefined
+
+show4digitsTZ ∷ TimeZone → AsciiBuilder
+show4digitsTZ tz
+ = case timeZoneMinutes tz of
+ offset | offset < 0 → A.toAsciiBuilder "-" ⊕ showTZ' (negate offset)
+ | otherwise → A.toAsciiBuilder "+" ⊕ showTZ' offset
+ where
+ showTZ' offset
+ = let h = offset `div` 60
+ m = offset - h * 60
+ in
+ show2 h ⊕ show2 m
+
+read4digitsTZ ∷ Parser TimeZone
+read4digitsTZ
+ = do sign ← (char '+' *> return 1)
+ <|>
+ (char '-' *> return (-1))
+ hour ← read2
+ minute ← read2
+ let tz = TimeZone {
+ timeZoneMinutes = sign * (hour * 60 + minute)
+ , timeZoneSummerOnly = False
+ , timeZoneName = timeZoneOffsetString tz
+ }
+ return tz
+
+assertWeekDayIsGood ∷ Monad m ⇒ Int → Day → m ()
+{-# INLINEABLE assertWeekDayIsGood #-}
+assertWeekDayIsGood givenWD gregDay
+ = let (_, _, correctWD ) = toWeekDate gregDay
+ (year, month, day) = toGregorian gregDay
+ in
+ unless (givenWD ≡ correctWD)
+ $ fail
+ $ concat [ "Gregorian day "
+ , show year
+ , "-"
+ , show month
+ , "-"
+ , show day
+ , " is "
+ , longWeekDayName correctWD
+ , ", not "
+ , longWeekDayName givenWD
+ ]
+
+assertGregorianDateIsGood ∷ Monad m ⇒ Integer → Int → Int → m Day
+{-# INLINEABLE assertGregorianDateIsGood #-}
+assertGregorianDateIsGood year month day
+ = case fromGregorianValid year month day of
+ Nothing
+ → fail $ concat [ "Invalid gregorian day: "
+ , show year
+ , "-"
+ , show month
+ , "-"
+ , show day
+ ]
+ Just gregDay
+ → return gregDay
+
+assertTimeOfDayIsGood ∷ Monad m ⇒ Int → Int → Pico → m TimeOfDay
+{-# INLINEABLE assertTimeOfDayIsGood #-}
+assertTimeOfDayIsGood hour minute second
+ = case makeTimeOfDayValid hour minute second of
+ Nothing
+ → fail $ concat [ "Invalid time of day: "
+ , show hour
+ , ":"
+ , show minute
+ , ":"
+ , showFixed True second
+ ]
+ Just tod
+ → return tod
+
+optionMaybe ∷ Alternative f ⇒ f a → f (Maybe a)
+{-# INLINE optionMaybe #-}
+optionMaybe p
+ = option Nothing (Just <$> p)
projects / time-http.git / blobdiff