{-# LANGUAGE OverloadedStrings #-}

module Plugin.GitHubCommit
    ( gitHubCommit
    ) where

import qualified Data.Text as T

import Database.SQLite.Simple
import Database.SQLite.Simple.FromRow
import Text.Regex.TDFA

import I18n
import qualified Message as M
import Plugin.Base

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

gitHubCommitAction :: PluginAction
gitHubCommitAction message = do
    dbConn <- open "db/sorbot_development.sqlite3"
    rs <- query dbConn "SELECT repo_url \
        \ FROM plugin_github_commit_channel_repo_urls \
        \ WHERE channel = ? \
        \ LIMIT 1"
        (Only (M.channel message))
        :: IO [RepoUrlRow]
    close dbConn

    return $ respond rs
  where
    respond [] =
        -- Left "I couldn't find a repo URL for this channel. \
        --     \Try `git remote set origin REPO_URL`."
        Left $ translate EN MsgGitHubCommitRepoURLNotFound
    respond ((RepoUrlRow r):_) =
        Right $ r `T.append` "/commits/" `T.append` T.pack (
            M.textStr message =~ matchRegex gitHubCommit)

type Id = Int

type RepoUrl = T.Text

-- | A type to match the database table for this plugin.
data RepoUrlRow = RepoUrlRow RepoUrl

instance FromRow RepoUrlRow where
    fromRow = RepoUrlRow <$> field