:author: marcink

    :copyright: (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>    

    :license: GPLv3, see COPYING for more details.

"""

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License

# as published by the Free Software Foundation; version 2

# of the License or (at your opinion) any later version of the license.

# 

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

# 

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,

# MA  02110-1301, USA.

import inspect

import json

import logging

import types

import urllib

from paste.response import replace_header

from pylons.controllers import WSGIController

from pylons.controllers.util import Response

from webob.exc import HTTPNotFound, HTTPForbidden, HTTPInternalServerError, \

HTTPBadRequest, HTTPError

from rhodecode.model.db import User

from rhodecode.lib.auth import AuthUser

log = logging.getLogger('JSONRPC')

class JSONRPCError(BaseException):

    def __init__(self, message):

        self.message = message

    def __str__(self):

        return str(self.message)

def jsonrpc_error(message, code=None):

            self._req_api_key = json_body['api_key']

            self._req_method = json_body['method']

            self._req_params = json_body['args']

            log.debug('method: %s, params: %s',

                      self._req_method,

                      self._req_params)

        except KeyError as e:

            return jsonrpc_error(message='Incorrect JSON query missing %s' % e)

        #check if we can find this session using api_key

        try:

            u = User.get_by_api_key(self._req_api_key)

            auth_u = AuthUser(u.user_id, self._req_api_key)

        except Exception as e:

            return jsonrpc_error(message='Invalid API KEY')

        self._error = None

        try:

            self._func = self._find_method()

        except AttributeError, e:

            return jsonrpc_error(message=str(e))

        # now that we have a method, add self._req_params to

        # self.kargs and dispatch control to WGIController

        # this is little trick to inject logged in user for 

        # perms decorators to work they expect the controller class to have

        # rhodecode_user attribute set

        self.rhodecode_user = auth_u

        # This attribute will need to be first param of a method that uses

        # api_key, which is translated to instance of user at that name

        USER_SESSION_ATTR = 'apiuser'

        if USER_SESSION_ATTR not in arglist:

            return jsonrpc_error(message='This method [%s] does not support '

                                 'authentication (missing %s param)' %

                                 (self._func.__name__, USER_SESSION_ATTR))

        # get our arglist and check if we provided them as args

            if arg == USER_SESSION_ATTR:

                # USER_SESSION_ATTR is something translated from api key and 

                # this is checked before so we don't need validate it

                continue

        self._rpc_args = {USER_SESSION_ATTR:u}

        self._rpc_args.update(self._req_params)

        self._rpc_args['action'] = self._req_method

        self._rpc_args['environ'] = environ

        self._rpc_args['start_response'] = start_response

        status = []

        headers = []

        exc_info = []

        def change_content(new_status, new_headers, new_exc_info=None):

            status.append(new_status)

            headers.extend(new_headers)

            exc_info.append(new_exc_info)

        output = WSGIController.__call__(self, environ, change_content)

        output = list(output)

        headers.append(('Content-Length', str(len(output[0]))))

        replace_header(headers, 'Content-Type', 'application/json')

        start_response(status[0], headers, exc_info[0])

        return output