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1339
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1 import Data.List
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2 import Data.Char
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3
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4 standardURL = "http://esolangs.org/wiki/Main_Page"
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5 standardMessage = "Welcome to the international hub for esoteric programming language design and deployment! For more information, check out our wiki: @. (For the other kind of esoterica, try #esoteric on irc.dal.net.)"
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6
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7 replace :: (Eq a) => [a] -> [a] -> [a] -> [a]
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8 replace _ _ [] = []
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9 replace old new (y:ys) =
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10 case stripPrefix old (y:ys) of
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11 Nothing -> y : replace old new ys
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12 Just ys' -> new ++ replace old new ys'
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13
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14 applyGenTemplate :: String -> String -> String -> String -- nick url template -> result
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15 applyGenTemplate nick url template = nick ++ ": " ++ replace "^" nick (replace "@" url template)
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16
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17 applyTemplate :: String -> String -> String -- nick template -> result
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18 applyTemplate nick template = applyGenTemplate nick standardURL template
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19
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20
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21
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22 reversibles = "<([{}])>"
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23
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24 -- there is probably a better way to do this with guards or somesuch
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25 reverseChar :: Char -> Maybe Int -> Char
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26 reverseChar c Nothing = c
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27 reverseChar c (Just a) = reversibles !! (length reversibles - 1 - a)
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28
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29 tidyReverse :: String -> String
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30 tidyReverse [] = []
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31 tidyReverse (c:cs) = (tidyReverse cs) ++ [reverseChar c (elemIndex c reversibles)]
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32
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33
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34 makeWelcome :: (String -> String) -> String -> String -- filter nick -> result
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35 makeWelcome f nick = applyTemplate nick (f standardMessage)
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36
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37
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38 welcome = makeWelcome id
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39 emoclew = makeWelcome tidyReverse
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40 wELCOME = makeWelcome (map toUpper)
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41 eMOCLEW = makeWelcome ((map toUpper) . tidyReverse)
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42
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