/brz/remove-bazaar

# Copyright (C) 2006 Canonical Ltd

#

# 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; either version 2 of the License, or

# (at your option) any later version.

#

# 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Server-side repository related request implmentations."""

from bzrlib import errors

from bzrlib.bzrdir import BzrDir

from bzrlib.smart.request import SmartServerRequest, SmartServerResponse

class SmartServerRepositoryRequest(SmartServerRequest):

    """Common base class for Repository requests."""

    def do(self, path, *args):

        """Execute a repository request.

        The repository must be at the exact path - no searching is done.

        The actual logic is delegated to self.do_repository_request.

        :param path: The path for the repository.

        :return: A smart server from self.do_repository_request().

        """

        transport = self._backing_transport.clone(path)

        bzrdir = BzrDir.open_from_transport(transport)

        repository = bzrdir.open_repository()

        return self.do_repository_request(repository, *args)

class SmartServerRepositoryGetRevisionGraph(SmartServerRepositoryRequest):

    def do_repository_request(self, repository, revision_id):

        """Return the result of repository.get_revision_graph(revision_id).

        :param repository: The repository to query in.

        :param revision_id: The utf8 encoded revision_id to get a graph from.

        :return: A smart server response where the body contains an utf8

            encoded flattened list of the revision graph.

        """

        decoded_revision_id = revision_id.decode('utf8')

        if not decoded_revision_id:

            decoded_revision_id = None

        lines = []

        try:

            revision_graph = repository.get_revision_graph(decoded_revision_id)

        except errors.NoSuchRevision:

            # Note that we return an empty body, rather than omitting the body.

            # This way the client knows that it can always expect to find a body

            # in the response for this method, even in the error case.

            return SmartServerResponse(('nosuchrevision', revision_id), '')

        for revision, parents in revision_graph.items():

            lines.append(' '.join([revision,] + parents))

        return SmartServerResponse(('ok', ), '\n'.join(lines).encode('utf8'))

class SmartServerRequestHasRevision(SmartServerRepositoryRequest):

    def do_repository_request(self, repository, revision_id):

        """Return ok if a specific revision is in the repository at path.

        :param repository: The repository to query in.

        :param revision_id: The utf8 encoded revision_id to lookup.

        :return: A smart server response of ('ok', ) if the revision is

            present.

        """

        decoded_revision_id = revision_id.decode('utf8')

        if repository.has_revision(decoded_revision_id):

            return SmartServerResponse(('ok', ))

        else:

            return SmartServerResponse(('no', ))

class SmartServerRepositoryGatherStats(SmartServerRepositoryRequest):

    def do_repository_request(self, repository, revid, committers):

        """Return the result of repository.gather_stats().

        :param repository: The repository to query in.

        :param revid: utf8 encoded rev id or an empty string to indicate None

        :param committers: 'yes' or 'no'.

        :return: A SmartServerResponse ('ok',), a encoded body looking like

              committers: 1

              firstrev: 1234.230 0

              latestrev: 345.700 3600

              revisions: 2

              size:45

              But containing only fields returned by the gather_stats() call

        """

        if revid == '':

            decoded_revision_id = None

        else:

            decoded_revision_id = revid.decode('utf8')

        if committers == 'yes':

            decoded_committers = True

        else:

            decoded_committers = None

        stats = repository.gather_stats(decoded_revision_id, decoded_committers)

        body = ''

        if stats.has_key('committers'):

            body += 'committers: %d\n' % stats['committers']

        if stats.has_key('firstrev'):

            body += 'firstrev: %.3f %d\n' % stats['firstrev']

        if stats.has_key('latestrev'):

             body += 'latestrev: %.3f %d\n' % stats['latestrev']

        if stats.has_key('revisions'):

            body += 'revisions: %d\n' % stats['revisions']

        if stats.has_key('size'):

            body += 'size: %d\n' % stats['size']

        return SmartServerResponse(('ok', ), body)

class SmartServerRepositoryIsShared(SmartServerRepositoryRequest):

    def do_repository_request(self, repository):

        """Return the result of repository.is_shared().

        :param repository: The repository to query in.

        :return: A smart server response of ('yes', ) if the repository is

            shared, and ('no', ) if it is not.

        """

        if repository.is_shared():

            return SmartServerResponse(('yes', ))

        else:

            return SmartServerResponse(('no', ))

class SmartServerRepositoryLockWrite(SmartServerRepositoryRequest):

    def do_repository_request(self, repository, token=''):

        # XXX: this probably should not have a token.

        if token == '':

            token = None

        try:

            token = repository.lock_write(token=token)

        except errors.LockContention, e:

            return SmartServerResponse(('LockContention',))

        repository.leave_lock_in_place()

        repository.unlock()

        if token is None:

            token = ''

        return SmartServerResponse(('ok', token))

class SmartServerRepositoryUnlock(SmartServerRepositoryRequest):

    def do_repository_request(self, repository, token):

        try:

            repository.lock_write(token=token)

        except errors.TokenMismatch, e:

            return SmartServerResponse(('TokenMismatch',))

        repository.dont_leave_lock_in_place()

        repository.unlock()

        return SmartServerResponse(('ok',))