# -*- test-case-name: twisted.web2.dav.test.test_mkcol -*-
##
# Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
# DRI: Wilfredo Sanchez, wsanchez@apple.com
##

"""
WebDAV MKCOL method
"""

__all__ = ["http_MKCOL"]

from twisted.python import log
from twisted.internet.defer import deferredGenerator, waitForDeferred
from twisted.web2 import responsecode
from twisted.web2.http import HTTPError, StatusResponse
from twisted.web2.dav.fileop import mkcollection
from twisted.web2.dav.util import noDataFromStream, parentForURL

def http_MKCOL(self, request):
    """
    Respond to a MKCOL request. (RFC 2518, section 8.3)
    """
    parent = waitForDeferred(request.locateResource(parentForURL(request.uri)))
    yield parent
    parent = parent.getResult()

    if self.fp.exists():
        log.err("Attempt to create collection where file exists: %s"
                % (self.fp.path,))
        raise HTTPError(responsecode.NOT_ALLOWED)

    if not parent.isCollection():
        log.err("Attempt to create collection with non-collection parent: %s"
                % (self.fp.path,))
        raise HTTPError(StatusResponse(
            responsecode.CONFLICT,
            "Parent resource is not a collection."
        ))

    if not self.fp.parent().isdir():
        log.err("Attempt to create collection with no parent directory: %s"
                % (self.fp.path,))
        raise HTTPError(StatusResponse(
            responsecode.INTERNAL_SERVER_ERROR,
            "The requested resource is not backed by a parent directory."
        ))

    #
    # Read request body
    #
    x = waitForDeferred(noDataFromStream(request.stream))
    yield x
    try:
        x.getResult()
    except ValueError, e:
        log.err("Error while handling MKCOL body: %s" % (e,))
        raise HTTPError(responsecode.UNSUPPORTED_MEDIA_TYPE)

    response = waitForDeferred(mkcollection(self.fp))
    yield response
    yield response.getResult()

http_MKCOL = deferredGenerator(http_MKCOL)