:copyright: (c) 2013 RhodeCode GmbH, and others.

:license: GPLv3, see LICENSE.md for more details.

"""

import logging

import os

import urllib.parse

import mercurial.hgweb

from kallithea.controllers import base

from kallithea.lib.utils import make_ui

from kallithea.lib.utils2 import safe_bytes

log = logging.getLogger(__name__)

def get_header_hgarg(environ):

    """Decode the special Mercurial encoding of big requests over multiple headers.

    >>> get_header_hgarg({})

    ''

    >>> get_header_hgarg({'HTTP_X_HGARG_0': ' ', 'HTTP_X_HGARG_1': 'a','HTTP_X_HGARG_2': '','HTTP_X_HGARG_3': 'b+c %20'})

    'ab+c %20'

    """

    chunks = []

    i = 1

    while True:

        v = environ.get('HTTP_X_HGARG_%d' % i)

        if v is None:

            break

        chunks.append(v)

        i += 1

    return ''.join(chunks)

cmd_mapping = {

    # 'batch' is not in this list - it is handled explicitly

    'between': 'pull',

    'branches': 'pull',

    'branchmap': 'pull',

    'capabilities': 'pull',

    'changegroup': 'pull',

    'changegroupsubset': 'pull',

    'changesetdata': 'pull',

    'clonebundles': 'pull',

    'debugwireargs': 'pull',

    'filedata': 'pull',

    'getbundle': 'pull',

    'getlfile': 'pull',

    'heads': 'pull',

    'hello': 'pull',

    'known': 'pull',

    'lheads': 'pull',

    'listkeys': 'pull',

    'lookup': 'pull',

    'manifestdata': 'pull',

    'narrow_widen': 'pull',

    'protocaps': 'pull',

    'statlfile': 'pull',

    'stream_out': 'pull',

    'pushkey': 'push',

    'putlfile': 'push',

    'unbundle': 'push',

    }

class SimpleHg(base.BaseVCSController):

    scm_alias = 'hg'

    @classmethod

    def parse_request(cls, environ):

        http_accept = environ.get('HTTP_ACCEPT', '')

        if not http_accept.startswith('application/mercurial'):

            return None

        path_info = base.get_path_info(environ)

        if not path_info.startswith('/'): # it must!

            return None

        class parsed_request(object):

            repo_name = path_info[1:].rstrip('/')

            query_string = environ['QUERY_STRING']

            action = None

            for qry in query_string.split('&'):

                parts = qry.split('=', 1)

                if len(parts) == 2 and parts[0] == 'cmd':

                    cmd = parts[1]

                    if cmd == 'batch':

                        hgarg = get_header_hgarg(environ)

                        if not hgarg.startswith('cmds='):

                            action = 'push' # paranoid and safe