29 lines
595 B
Haskell
29 lines
595 B
Haskell
module Shortener.UrlTable
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( UrlTable
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, records
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, insert
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, extract
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) where
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import Shortener.Generator
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import Control.Applicative
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import Control.Monad
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import Data.Maybe
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import qualified Data.HashTable.IO as H
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type UrlTable = H.CuckooHashTable Word Url
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--Empty url hash table
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records :: IO UrlTable
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records = H.new
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-- Insert the url in the table and return the word
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insert :: UrlTable -> Url -> IO Word
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insert table url = H.insert table new url >> return new
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where new = wordID url
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-- Lookup the table for the associated url
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extract :: UrlTable -> Word -> IO (Maybe Url)
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extract = H.lookup
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