src/Plugin.hs


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module Plugin
    ( Plugin
    , matchPlugin
    , performPlugin
    , plugins
    ) where

import Text.Regex.TDFA

type PluginAction = String -> String

data Plugin = Plugin
    { matchRegex :: String
    , perform    :: PluginAction
    }

instance Show Plugin where
    show (Plugin r p) = "matchRegex = " ++ r

matchPlugin :: String -> Maybe Plugin
matchPlugin message = firstPlugin $ matchPlugins message plugins
  where
    firstPlugin []     = Nothing
    firstPlugin (p:ps) = Just p

matchPlugins :: String -> [Plugin] -> [Plugin]
matchPlugins message plugins = [p | p <- plugins, message =~ matchRegex p]

performPlugin :: Plugin -> String -> String
performPlugin p message = perform p $ message =~ matchRegex p

gitHubCommit = Plugin
    { matchRegex = "^[0-9a-f]{40}$"
    , perform = gitHubCommitAction
    }

gitHubCommitAction :: PluginAction
gitHubCommitAction match = "https://github.com/" ++ match

plugins :: [Plugin]
plugins =
    [ gitHubCommit
    ]