vervis/src/Network/Git/Local/UploadHaves/Get.hs

{- This file is part of Vervis.
 -
 - Written in 2016 by fr33domlover <fr33domlover@riseup.net>.
 -
 - ♡ Copying is an act of love. Please copy, reuse and share.
 -
 - The author(s) have dedicated all copyright and related and neighboring
 - rights to this software to the public domain worldwide. This software is
 - distributed without any warranty.
 -
 - You should have received a copy of the CC0 Public Domain Dedication along
 - with this software. If not, see
 - <http://creativecommons.org/publicdomain/zero/1.0/>.
 -}

module Network.Git.Local.UploadHaves.Get
    ( getUploadHaves
    )
where

getHaves :: Get [ObjId]
getHaves = many $ getTaggedObjId "have"

requireDone :: Get ()
requireDone = getDataPkt $ \ len ->
    if len < 4 || len > 5
        then fail "invalid pkt-len for a \"done\" line"
        else do
            requireByteString "done"
            when (len == 5) requireNewline

getUploadHaves :: Get UploadHaves
getUploadHaves = do
    haves <- getHaves
    requireFlushPkt <|> requireDone
    return UploadHaves
        { uhHave = haves
        }