module HandlerUtils where

import Control.Monad.Reader

import qualified Data.ByteString.Char8 as B

import Data.List

import RoomsAndClients

import CoreTypes

type CmdHandler = [B.ByteString] -> Reader (ClientIndex, IRnC) [Action]

thisClient :: Reader (ClientIndex, IRnC) ClientInfo

thisClient = do

    (ci, rnc) <- ask

    return $ rnc `client` ci

thisRoom :: Reader (ClientIndex, IRnC) RoomInfo

thisRoom = do

    (ci, rnc) <- ask

    let ri = clientRoom rnc ci

    return $ rnc `room` ri

clientNick :: Reader (ClientIndex, IRnC) B.ByteString

clientNick = liftM nick thisClient

roomOthersChans :: Reader (ClientIndex, IRnC) [ClientChan]

roomOthersChans = do

    (ci, rnc) <- ask

    let ri = clientRoom rnc ci

    return $ map (sendChan . client rnc) $ filter (/= ci) (roomClients rnc ri)

roomSameClanChans :: Reader (ClientIndex, IRnC) [ClientChan]

roomSameClanChans = do

    (ci, rnc) <- ask

    let ri = clientRoom rnc ci

    let otherRoomClients = map (client rnc) . filter (/= ci) $ roomClients rnc ri

    let cl = rnc `client` ci

    let sameClanClients = Prelude.filter (\c -> clientClan c == clientClan cl) otherRoomClients

    return $ map sendChan sameClanClients

roomClientsChans :: Reader (ClientIndex, IRnC) [ClientChan]

roomClientsChans = do

    (ci, rnc) <- ask

    let ri = clientRoom rnc ci

    return $ map (sendChan . client rnc) (roomClients rnc ri)

thisClientChans :: Reader (ClientIndex, IRnC) [ClientChan]

thisClientChans = do

    (ci, rnc) <- ask

    return [sendChan (rnc `client` ci)]

sameProtoChans :: Reader (ClientIndex, IRnC) [ClientChan]

sameProtoChans = do

    (ci, rnc) <- ask

    let p = clientProto (rnc `client` ci)

    return . map sendChan . filter (\c -> clientProto c == p) . map (client rnc) $ allClients rnc

answerClient :: [B.ByteString] -> Reader (ClientIndex, IRnC) [Action]

answerClient msg = liftM ((: []) . flip AnswerClients msg) thisClientChans

allRoomInfos :: Reader (a, IRnC) [RoomInfo]

allRoomInfos = liftM ((\irnc -> map (room irnc) $ allRooms irnc) . snd) ask

clientByNick :: B.ByteString -> Reader (ClientIndex, IRnC) (Maybe ClientIndex)

clientByNick n = do

    (_, rnc) <- ask

    let allClientIDs = allClients rnc

    return $ find (\clId -> let cl = client rnc clId in n == nick cl && not (isChecker cl)) allClientIDs

roomAdminOnly :: Reader (ClientIndex, IRnC) [Action] -> Reader (ClientIndex, IRnC) [Action]

roomAdminOnly h = thisClient >>= \cl -> if isMaster cl then h else return []

serverAdminOnly :: Reader (ClientIndex, IRnC) [Action] -> Reader (ClientIndex, IRnC) [Action]

serverAdminOnly h = thisClient >>= \cl -> if isAdministrator cl then h else return []