# -*- coding: utf-8 -*-

"""

    rhodecode.controllers.files

    ~~~~~~~~~~~~~~~~~~~~~~~~~~~

    Files controller for RhodeCode

    :created_on: Apr 21, 2010

    :author: marcink

    :copyright: (C) 2009-2011 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, either version 3 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, see <http://www.gnu.org/licenses/>.

import os

import logging

import traceback

from os.path import join as jn

from pylons import request, response, session, tmpl_context as c, url

from pylons.i18n.translation import _

from pylons.controllers.util import redirect

from pylons.decorators import jsonify

from vcs.conf import settings

from vcs.exceptions import RepositoryError, ChangesetDoesNotExistError, \

from vcs.nodes import FileNode, NodeKind

from vcs.utils import diffs as differ

from rhodecode.lib import convert_line_endings, detect_mode, safe_str

from rhodecode.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator

from rhodecode.lib.base import BaseRepoController, render

from rhodecode.lib.utils import EmptyChangeset

import rhodecode.lib.helpers as h

from rhodecode.model.repo import RepoModel

log = logging.getLogger(__name__)

class FilesController(BaseRepoController):

    @LoginRequired()

    def __before__(self):

        super(FilesController, self).__before__()

        c.cut_off_limit = self.cut_off_limit

    def __get_cs_or_redirect(self, rev, repo_name, redirect_after=True):

        """

        Safe way to get changeset if error occur it redirects to tip with

        proper message

        :param rev: revision to fetch

        :param repo_name: repo name to redirect after

        """

        try:

            return c.rhodecode_repo.get_changeset(rev)

        except EmptyRepositoryError, e:

            if not redirect_after:

                return None

            url_ = url('files_add_home',

                       repo_name=c.repo_name,

                       revision=0,f_path='')

            add_new = '<a href="%s">[%s]</a>' % (url_,_('add new'))

            h.flash(h.literal(_('There are no files yet %s' % add_new)), 

                    category='warning')

            redirect(h.url('summary_home', repo_name=repo_name))

        except RepositoryError, e:

            h.flash(str(e), category='warning')

            redirect(h.url('files_home', repo_name=repo_name, revision='tip'))

    def __get_filenode_or_redirect(self, repo_name, cs, path):

        """

        Returns file_node, if error occurs or given path is directory,

        it'll redirect to top level path

        :param repo_name: repo_name

        :param cs: given changeset

        :param path: path to lookup

        """

        try:

            file_node = cs.get_node(path)

            if file_node.is_dir():

                raise RepositoryError('given path is a directory')

        except RepositoryError, e:

            h.flash(str(e), category='warning')

            redirect(h.url('files_home', repo_name=repo_name,

                           revision=cs.raw_id))

        return file_node

    def __get_paths(self, changeset, starting_path):

        """recursive walk in root dir and return a set of all path in that dir

        based on repository walk function

        """

        _files = list()

        _dirs = list()

        try:

            tip = changeset

            for topnode, dirs, files in tip.walk(starting_path):

                for f in files:

                    _files.append(f.path)

                for d in dirs:

                    _dirs.append(d.path)

        except RepositoryError, e:

            log.debug(traceback.format_exc())

            pass

        return _dirs, _files

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def index(self, repo_name, revision, f_path):

        #reditect to given revision from form if given

        post_revision = request.POST.get('at_rev', None)

        if post_revision:

            cs = self.__get_cs_or_redirect(post_revision, repo_name)

            redirect(url('files_home', repo_name=c.repo_name,

                         revision=cs.raw_id, f_path=f_path))

        c.changeset = self.__get_cs_or_redirect(revision, repo_name)

        c.branch = request.GET.get('branch', None)

        c.f_path = f_path

        cur_rev = c.changeset.revision

        #prev link

        try:

            prev_rev = c.rhodecode_repo.get_changeset(cur_rev).prev(c.branch)

            c.url_prev = url('files_home', repo_name=c.repo_name,

                         revision=prev_rev.raw_id, f_path=f_path)

            if c.branch:

                c.url_prev += '?branch=%s' % c.branch

        except (ChangesetDoesNotExistError, VCSError):

            c.url_prev = '#'

        #next link

        try:

            next_rev = c.rhodecode_repo.get_changeset(cur_rev).next(c.branch)

            c.url_next = url('files_home', repo_name=c.repo_name,

                     revision=next_rev.raw_id, f_path=f_path)

            if c.branch:

                c.url_next += '?branch=%s' % c.branch

        except (ChangesetDoesNotExistError, VCSError):

            c.url_next = '#'

        #files or dirs

        try:

            c.files_list = c.changeset.get_node(f_path)

            if c.files_list.is_file():

                c.file_history = self._get_node_history(c.changeset, f_path)

            else:

                c.file_history = []

        except RepositoryError, e:

            h.flash(str(e), category='warning')

            redirect(h.url('files_home', repo_name=repo_name,

                           revision=revision))

        return render('files/files.html')

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def rawfile(self, repo_name, revision, f_path):

        cs = self.__get_cs_or_redirect(revision, repo_name)

        file_node = self.__get_filenode_or_redirect(repo_name, cs, f_path)

        response.content_disposition = 'attachment; filename=%s' % \

            safe_str(f_path.split(os.sep)[-1])

        response.content_type = file_node.mimetype

        return file_node.content

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def raw(self, repo_name, revision, f_path):

        cs = self.__get_cs_or_redirect(revision, repo_name)

        file_node = self.__get_filenode_or_redirect(repo_name, cs, f_path)

        raw_mimetype_mapping = {

            # map original mimetype to a mimetype used for "show as raw"

            # you can also provide a content-disposition to override the

            # default "attachment" disposition.

            # orig_type: (new_type, new_dispo)

            # show images inline:

            'image/x-icon': ('image/x-icon', 'inline'),

            'image/png': ('image/png', 'inline'),

            'image/gif': ('image/gif', 'inline'),

            'image/jpeg': ('image/jpeg', 'inline'),

            'image/svg+xml': ('image/svg+xml', 'inline'),

        }

        mimetype = file_node.mimetype

        try:

            mimetype, dispo = raw_mimetype_mapping[mimetype]

        except KeyError:

            # we don't know anything special about this, handle it safely

            if file_node.is_binary:

                # do same as download raw for binary files

                mimetype, dispo = 'application/octet-stream', 'attachment'

            else:

                # do not just use the original mimetype, but force text/plain,

                # otherwise it would serve text/html and that might be unsafe.

                # Note: underlying vcs library fakes text/plain mimetype if the

                # mimetype can not be determined and it thinks it is not

                # binary.This might lead to erroneous text display in some

                # cases, but helps in other cases, like with text files

                # without extension.

                mimetype, dispo = 'text/plain', 'inline'

        if dispo == 'attachment':

            dispo = 'attachment; filename=%s' % \

                        safe_str(f_path.split(os.sep)[-1])

        response.content_disposition = dispo

        response.content_type = mimetype

        return file_node.content

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def annotate(self, repo_name, revision, f_path):

        c.cs = self.__get_cs_or_redirect(revision, repo_name)

        c.file = self.__get_filenode_or_redirect(repo_name, c.cs, f_path)

        c.file_history = self._get_node_history(c.cs, f_path)

        c.f_path = f_path

        return render('files/files_annotate.html')

    @HasRepoPermissionAnyDecorator('repository.write', 'repository.admin')

    def edit(self, repo_name, revision, f_path):

        r_post = request.POST

        c.cs = self.__get_cs_or_redirect(revision, repo_name)

        c.file = self.__get_filenode_or_redirect(repo_name, c.cs, f_path)

        if c.file.is_binary:

            return redirect(url('files_home', repo_name=c.repo_name,

                         revision=c.cs.raw_id, f_path=f_path))

        c.f_path = f_path

        if r_post:

            old_content = c.file.content

            sl = old_content.splitlines(1)

            first_line = sl[0] if sl else ''

            # modes:  0 - Unix, 1 - Mac, 2 - DOS

            mode = detect_mode(first_line, 0)

            content = convert_line_endings(r_post.get('content'), mode)

            message = r_post.get('message') or (_('Edited %s via RhodeCode')

                                                % (f_path))

            author = self.rhodecode_user.full_contact

            if content == old_content:

                h.flash(_('No changes'),

                    category='warning')

                return redirect(url('changeset_home', repo_name=c.repo_name,

                                    revision='tip'))

            try:

                self.scm_model.commit_change(repo=c.rhodecode_repo,

                                             repo_name=repo_name, cs=c.cs,

                                             user=self.rhodecode_user,

                                             author=author, message=message,

                                             content=content, f_path=f_path)

                h.flash(_('Successfully committed to %s' % f_path),

                        category='success')

            except Exception:

                log.error(traceback.format_exc())

                h.flash(_('Error occurred during commit'), category='error')

            return redirect(url('changeset_home',

                                repo_name=c.repo_name, revision='tip'))

        return render('files/files_edit.html')

    @HasRepoPermissionAnyDecorator('repository.write', 'repository.admin')

    def add(self, repo_name, revision, f_path):

        r_post = request.POST

        c.cs = self.__get_cs_or_redirect(revision, repo_name, 

                                         redirect_after=False)

        if c.cs is None:

            c.cs = EmptyChangeset(alias=c.rhodecode_repo.alias)

        c.f_path = f_path

        if r_post:

            unix_mode = 0

            content = convert_line_endings(r_post.get('content'), unix_mode)

            message = r_post.get('message') or (_('Added %s via RhodeCode')

                                                % (f_path))

            location = r_post.get('location')

            filename = r_post.get('filename')

            node_path = os.path.join(location, filename)

            author = self.rhodecode_user.full_contact

            if not content:

                h.flash(_('No content'), category='warning')

                return redirect(url('changeset_home', repo_name=c.repo_name,

                                    revision='tip'))

            if not filename:

                h.flash(_('No filename'), category='warning')

                return redirect(url('changeset_home', repo_name=c.repo_name,

                                    revision='tip'))                

            try:

                self.scm_model.create_node(repo=c.rhodecode_repo,

                                             repo_name=repo_name, cs=c.cs,

                                             user=self.rhodecode_user,

                                             author=author, message=message,

                                             content=content, f_path=node_path)

                h.flash(_('Successfully committed to %s' % node_path),

                        category='success')

            except Exception:

                log.error(traceback.format_exc())

                h.flash(_('Error occurred during commit'), category='error')

            return redirect(url('changeset_home',

                                repo_name=c.repo_name, revision='tip'))

        return render('files/files_add.html')

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def archivefile(self, repo_name, fname):

        fileformat = None

        revision = None

        ext = None

        subrepos = request.GET.get('subrepos') == 'true'

        for a_type, ext_data in settings.ARCHIVE_SPECS.items():

            archive_spec = fname.split(ext_data[1])

            if len(archive_spec) == 2 and archive_spec[1] == '':

                fileformat = a_type or ext_data[1]

                revision = archive_spec[0]

                ext = ext_data[1]

        try:

            dbrepo = RepoModel().get_by_repo_name(repo_name)

            if dbrepo.enable_downloads is False:

                return _('downloads disabled')

            cs = c.rhodecode_repo.get_changeset(revision)

            content_type = settings.ARCHIVE_SPECS[fileformat][0]

        except ChangesetDoesNotExistError:

            return _('Unknown revision %s') % revision

        except EmptyRepositoryError:

            return _('Empty repository')

        except (ImproperArchiveTypeError, KeyError):

            return _('Unknown archive type')

        response.content_type = content_type

        response.content_disposition = 'attachment; filename=%s-%s%s' \

            % (repo_name, revision, ext)

        import tempfile

        archive = tempfile.mkstemp()[1]

        t = open(archive, 'wb')

        cs.fill_archive(stream=t, kind=fileformat, subrepos=subrepos)

        def get_chunked_archive(archive):

            stream = open(archive, 'rb')

            while True:

                data = stream.read(4096)

                if not data:

                    os.remove(archive)

                    break

                yield data

        return get_chunked_archive(archive)

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def diff(self, repo_name, f_path):

        diff1 = request.GET.get('diff1')

        diff2 = request.GET.get('diff2')

        c.action = request.GET.get('diff')

        c.no_changes = diff1 == diff2

        c.f_path = f_path

        c.big_diff = False

        try:

            if diff1 not in ['', None, 'None', '0' * 12, '0' * 40]:

                c.changeset_1 = c.rhodecode_repo.get_changeset(diff1)

                node1 = c.changeset_1.get_node(f_path)

            else:

                c.changeset_1 = EmptyChangeset(repo=c.rhodecode_repo)

                node1 = FileNode('.', '', changeset=c.changeset_1)

            if diff2 not in ['', None, 'None', '0' * 12, '0' * 40]:

                c.changeset_2 = c.rhodecode_repo.get_changeset(diff2)

                node2 = c.changeset_2.get_node(f_path)

            else:

                c.changeset_2 = EmptyChangeset(repo=c.rhodecode_repo)

                node2 = FileNode('.', '', changeset=c.changeset_2)

        except RepositoryError:

            return redirect(url('files_home',

                                repo_name=c.repo_name, f_path=f_path))

        if c.action == 'download':

            diff = differ.DiffProcessor(differ.get_gitdiff(node1, node2),

                                        format='gitdiff')

            diff_name = '%s_vs_%s.diff' % (diff1, diff2)

            response.content_type = 'text/plain'

            response.content_disposition = 'attachment; filename=%s' \

                                                    % diff_name

            return diff.raw_diff()

        elif c.action == 'raw':

            diff = differ.DiffProcessor(differ.get_gitdiff(node1, node2),

                                        format='gitdiff')

            response.content_type = 'text/plain'

            return diff.raw_diff()

        elif c.action == 'diff':

            if node1.is_binary or node2.is_binary:

                c.cur_diff = _('Binary file')

            elif node1.size > self.cut_off_limit or \

                    node2.size > self.cut_off_limit:

                c.cur_diff = ''

                c.big_diff = True

            else:

                diff = differ.DiffProcessor(differ.get_gitdiff(node1, node2),

                                        format='gitdiff')

                c.cur_diff = diff.as_html()

        else:

            #default option

            if node1.is_binary or node2.is_binary:

                c.cur_diff = _('Binary file')

            elif node1.size > self.cut_off_limit or \

                    node2.size > self.cut_off_limit:

                c.cur_diff = ''

                c.big_diff = True

            else:

                diff = differ.DiffProcessor(differ.get_gitdiff(node1, node2),

                                        format='gitdiff')

                c.cur_diff = diff.as_html()

        if not c.cur_diff and not c.big_diff:

            c.no_changes = True

        return render('files/file_diff.html')

    def _get_node_history(self, cs, f_path):

        changesets = cs.get_file_history(f_path)

        hist_l = []

        changesets_group = ([], _("Changesets"))

        branches_group = ([], _("Branches"))

        tags_group = ([], _("Tags"))

        for chs in changesets:

            n_desc = 'r%s:%s' % (chs.revision, chs.short_id)

            changesets_group[0].append((chs.raw_id, n_desc,))

        hist_l.append(changesets_group)

        for name, chs in c.rhodecode_repo.branches.items():

            #chs = chs.split(':')[-1]

            branches_group[0].append((chs, name),)

        hist_l.append(branches_group)

        for name, chs in c.rhodecode_repo.tags.items():

            #chs = chs.split(':')[-1]

            tags_group[0].append((chs, name),)

        hist_l.append(tags_group)

        return hist_l

    @jsonify

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def nodelist(self, repo_name, revision, f_path):

        if request.environ.get('HTTP_X_PARTIAL_XHR'):

            cs = self.__get_cs_or_redirect(revision, repo_name)

            _d, _f = self.__get_paths(cs, f_path)

            return _d + _f

# -*- coding: utf-8 -*-

"""

    rhodecode.model.scm

    ~~~~~~~~~~~~~~~~~~~

    Scm model for RhodeCode

    :created_on: Apr 9, 2010

    :author: marcink

    :copyright: (C) 2009-2011 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, either version 3 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, see <http://www.gnu.org/licenses/>.

import os

import time

import traceback

import logging

from sqlalchemy.exc import DatabaseError

from vcs import get_backend

from vcs.exceptions import RepositoryError

from vcs.utils.lazy import LazyProperty

from vcs.nodes import FileNode

from rhodecode import BACKENDS

from rhodecode.lib import helpers as h

from rhodecode.lib import safe_str

from rhodecode.lib.auth import HasRepoPermissionAny

from rhodecode.lib.utils import get_repos as get_filesystem_repos, make_ui, \

    action_logger, EmptyChangeset

from rhodecode.model import BaseModel

from rhodecode.model.user import UserModel

from rhodecode.model.db import Repository, RhodeCodeUi, CacheInvalidation, \

    UserFollowing, UserLog

log = logging.getLogger(__name__)

class UserTemp(object):

    def __init__(self, user_id):

        self.user_id = user_id

    def __repr__(self):

        return "<%s('id:%s')>" % (self.__class__.__name__, self.user_id)

class RepoTemp(object):

    def __init__(self, repo_id):

        self.repo_id = repo_id

    def __repr__(self):

        return "<%s('id:%s')>" % (self.__class__.__name__, self.repo_id)

class CachedRepoList(object):

    def __init__(self, db_repo_list, repos_path, order_by=None):

        self.db_repo_list = db_repo_list

        self.repos_path = repos_path

        self.order_by = order_by

        self.reversed = (order_by or '').startswith('-')

    def __len__(self):

        return len(self.db_repo_list)

    def __repr__(self):

        return '<%s (%s)>' % (self.__class__.__name__, self.__len__())

    def __iter__(self):

        for dbr in self.db_repo_list:

            scmr = dbr.scm_instance_cached

            # check permission at this level

            if not HasRepoPermissionAny('repository.read', 'repository.write',

                                        'repository.admin')(dbr.repo_name,

                                                            'get repo check'):

                continue

            if scmr is None:

                log.error('%s this repository is present in database but it '

                          'cannot be created as an scm instance',

                          dbr.repo_name)

                continue

            last_change = scmr.last_change

            tip = h.get_changeset_safe(scmr, 'tip')

            tmp_d = {}

            tmp_d['name'] = dbr.repo_name

            tmp_d['name_sort'] = tmp_d['name'].lower()

            tmp_d['description'] = dbr.description

            tmp_d['description_sort'] = tmp_d['description']

            tmp_d['last_change'] = last_change

            tmp_d['last_change_sort'] = time.mktime(last_change \

                                                    .timetuple())

            tmp_d['tip'] = tip.raw_id

            tmp_d['tip_sort'] = tip.revision

            tmp_d['rev'] = tip.revision

            tmp_d['contact'] = dbr.user.full_contact

            tmp_d['contact_sort'] = tmp_d['contact']

            tmp_d['owner_sort'] = tmp_d['contact']

            tmp_d['repo_archives'] = list(scmr._get_archives())

            tmp_d['last_msg'] = tip.message

            tmp_d['author'] = tip.author

            tmp_d['dbrepo'] = dbr.get_dict()

            tmp_d['dbrepo_fork'] = dbr.fork.get_dict() if dbr.fork \

                                                                    else {}

            yield tmp_d

class ScmModel(BaseModel):

    """Generic Scm Model

    """

    @LazyProperty

    def repos_path(self):

        """Get's the repositories root path from database

        """

        q = self.sa.query(RhodeCodeUi).filter(RhodeCodeUi.ui_key == '/').one()

        return q.ui_value

    def repo_scan(self, repos_path=None):

        """Listing of repositories in given path. This path should not be a

        repository itself. Return a dictionary of repository objects

        :param repos_path: path to directory containing repositories

        """

        log.info('scanning for repositories in %s', repos_path)

        if repos_path is None:

            repos_path = self.repos_path

        baseui = make_ui('db')

        repos_list = {}

        for name, path in get_filesystem_repos(repos_path, recursive=True):

            try:

                if name in repos_list:

                    raise RepositoryError('Duplicate repository name %s '

                                    'found in %s' % (name, path))

                else:

                    klass = get_backend(path[0])

                    if path[0] == 'hg' and path[0] in BACKENDS.keys():

                        # for mercurial we need to have an str path

                        repos_list[name] = klass(safe_str(path[1]),

                                                 baseui=baseui)

                    if path[0] == 'git' and path[0] in BACKENDS.keys():

                        repos_list[name] = klass(path[1])

            except OSError:

                continue

        return repos_list

    def get_repos(self, all_repos=None, sort_key=None):

        """

        Get all repos from db and for each repo create it's

        backend instance and fill that backed with information from database

        :param all_repos: list of repository names as strings

            give specific repositories list, good for filtering

        """

        if all_repos is None:

            all_repos = self.sa.query(Repository)\

                        .filter(Repository.group_id == None)\

                        .order_by(Repository.repo_name).all()

        repo_iter = CachedRepoList(all_repos, repos_path=self.repos_path,

                                   order_by=sort_key)

        return repo_iter

    def mark_for_invalidation(self, repo_name):

        """Puts cache invalidation task into db for

        further global cache invalidation

        :param repo_name: this repo that should invalidation take place

        """

        log.debug('marking %s for invalidation', repo_name)

        cache = self.sa.query(CacheInvalidation)\

            .filter(CacheInvalidation.cache_key == repo_name).scalar()

        if cache:

            # mark this cache as inactive

            cache.cache_active = False

        else:

            log.debug('cache key not found in invalidation db -> creating one')

            cache = CacheInvalidation(repo_name)

        try:

            self.sa.add(cache)

            self.sa.commit()

        except (DatabaseError,):

            log.error(traceback.format_exc())

            self.sa.rollback()

    def toggle_following_repo(self, follow_repo_id, user_id):

        f = self.sa.query(UserFollowing)\

            .filter(UserFollowing.follows_repo_id == follow_repo_id)\

            .filter(UserFollowing.user_id == user_id).scalar()

        if f is not None:

            try:

                self.sa.delete(f)

                self.sa.commit()

                action_logger(UserTemp(user_id),

                              'stopped_following_repo',

                              RepoTemp(follow_repo_id))

                return

            except:

                log.error(traceback.format_exc())

                self.sa.rollback()

                raise

        try:

            f = UserFollowing()

            f.user_id = user_id

            f.follows_repo_id = follow_repo_id

            self.sa.add(f)

            self.sa.commit()

            action_logger(UserTemp(user_id),

                          'started_following_repo',

                          RepoTemp(follow_repo_id))

        except:

            log.error(traceback.format_exc())

            self.sa.rollback()

            raise

    def toggle_following_user(self, follow_user_id, user_id):

        f = self.sa.query(UserFollowing)\

            .filter(UserFollowing.follows_user_id == follow_user_id)\

            .filter(UserFollowing.user_id == user_id).scalar()

        if f is not None:

            try:

                self.sa.delete(f)

                self.sa.commit()

                return

            except:

                log.error(traceback.format_exc())

                self.sa.rollback()

                raise

        try:

            f = UserFollowing()

            f.user_id = user_id

            f.follows_user_id = follow_user_id

            self.sa.add(f)

            self.sa.commit()

        except:

            log.error(traceback.format_exc())

            self.sa.rollback()

            raise

    def is_following_repo(self, repo_name, user_id, cache=False):

        r = self.sa.query(Repository)\

            .filter(Repository.repo_name == repo_name).scalar()

        f = self.sa.query(UserFollowing)\

            .filter(UserFollowing.follows_repository == r)\

            .filter(UserFollowing.user_id == user_id).scalar()

        return f is not None

    def is_following_user(self, username, user_id, cache=False):

        u = UserModel(self.sa).get_by_username(username)

        f = self.sa.query(UserFollowing)\

            .filter(UserFollowing.follows_user == u)\

            .filter(UserFollowing.user_id == user_id).scalar()

        return f is not None

    def get_followers(self, repo_id):

        if not isinstance(repo_id, int):

            repo_id = getattr(Repository.by_repo_name(repo_id), 'repo_id')

        return self.sa.query(UserFollowing)\

                .filter(UserFollowing.follows_repo_id == repo_id).count()

    def get_forks(self, repo_id):

        if not isinstance(repo_id, int):

            repo_id = getattr(Repository.by_repo_name(repo_id), 'repo_id')

        return self.sa.query(Repository)\

                .filter(Repository.fork_id == repo_id).count()

    def pull_changes(self, repo_name, username):

        dbrepo = Repository.by_repo_name(repo_name)

        repo = dbrepo.scm_instance

        try:

            extras = {'ip': '',

                      'username': username,

                      'action': 'push_remote',

                      'repository': repo_name}

            #inject ui extra param to log this action via push logger

            for k, v in extras.items():

                repo._repo.ui.setconfig('rhodecode_extras', k, v)

            repo.pull(dbrepo.clone_uri)

            self.mark_for_invalidation(repo_name)

        except:

            log.error(traceback.format_exc())

            raise

    def commit_change(self, repo, repo_name, cs, user, author, message, content,

                      f_path):

        if repo.alias == 'hg':

            from vcs.backends.hg import MercurialInMemoryChangeset as IMC

        elif repo.alias == 'git':

            from vcs.backends.git import GitInMemoryChangeset as IMC

        # decoding here will force that we have proper encoded values

        # in any other case this will throw exceptions and deny commit

        content = safe_str(content)

        message = safe_str(message)

        path = safe_str(f_path)

        author = safe_str(author)

        m = IMC(repo)

        m.change(FileNode(path, content))

        tip = m.commit(message=message,

                 author=author,

                 parents=[cs], branch=cs.branch)

        new_cs = tip.short_id

        action = 'push_local:%s' % new_cs

        action_logger(user, action, repo_name)

        self.mark_for_invalidation(repo_name)

    def create_node(self, repo, repo_name, cs, user, author, message, content,

                      f_path):

        if repo.alias == 'hg':

            from vcs.backends.hg import MercurialInMemoryChangeset as IMC

        elif repo.alias == 'git':

            from vcs.backends.git import GitInMemoryChangeset as IMC

        # decoding here will force that we have proper encoded values