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

"""

    rhodecode.model.comment

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

    comments model for RhodeCode

    :created_on: Nov 11, 2011

    :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 logging

import traceback

from rhodecode.model import BaseModel

from sqlalchemy.util.compat import defaultdict

log = logging.getLogger(__name__)

class ChangesetCommentsModel(BaseModel):

    def create(self, text, repo_id, user_id, revision, f_path=None,

               line_no=None):

        """

        Creates new comment for changeset

        :param text:

        :param repo_id:

        :param user_id:

        :param revision:

        :param f_path:

        :param line_no:

        """

        if text:

            comment = ChangesetComment()

            comment.repo_id = repo_id

            comment.user_id = user_id

            comment.revision = revision

            comment.text = text

            comment.f_path = f_path

            comment.line_no = line_no

            self.sa.add(comment)

            self.sa.commit()

            return comment

    def delete(self, comment_id):

        """

        Deletes given comment

        :param comment_id:

        """

        comment = ChangesetComment.get(comment_id)

        self.sa.delete(comment)

        self.sa.commit()

        return comment

    def get_comments(self, repo_id, revision):

        return ChangesetComment.query()\

                .filter(ChangesetComment.repo_id == repo_id)\

                .filter(ChangesetComment.revision == revision)\

                .filter(ChangesetComment.line_no == None)\

                .filter(ChangesetComment.f_path == None).all()

    def get_inline_comments(self, repo_id, revision):

        comments = self.sa.query(ChangesetComment)\

            .filter(ChangesetComment.repo_id == repo_id)\

            .filter(ChangesetComment.revision == revision)\

            .filter(ChangesetComment.line_no != None)\

            .filter(ChangesetComment.f_path != None).all()

        paths = defaultdict(lambda:defaultdict(list))

        for co in comments:

            paths[co.f_path][co.line_no].append(co)

        return paths.items()

    repository_id = Column("repository_id", Integer(), ForeignKey('repositories.repo_id'), nullable=False, unique=None, default=None)

    repository_name = Column("repository_name", String(length=255, convert_unicode=False, assert_unicode=None), nullable=True, unique=None, default=None)

    user_ip = Column("user_ip", String(length=255, convert_unicode=False, assert_unicode=None), nullable=True, unique=None, default=None)

    action = Column("action", UnicodeText(length=1200000, convert_unicode=False, assert_unicode=None), nullable=True, unique=None, default=None)

    action_date = Column("action_date", DateTime(timezone=False), nullable=True, unique=None, default=None)

    @property

    def action_as_day(self):

        return date(*self.action_date.timetuple()[:3])

    user = relationship('User')

    repository = relationship('Repository')

class UsersGroup(Base, BaseModel):

    __tablename__ = 'users_groups'

    __table_args__ = {'extend_existing':True}

    users_group_id = Column("users_group_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    users_group_name = Column("users_group_name", String(length=255, convert_unicode=False, assert_unicode=None), nullable=False, unique=True, default=None)

    users_group_active = Column("users_group_active", Boolean(), nullable=True, unique=None, default=None)

    members = relationship('UsersGroupMember', cascade="all, delete, delete-orphan", lazy="joined")

    def __repr__(self):

        return '<userGroup(%s)>' % (self.users_group_name)

    @classmethod

    def get_by_group_name(cls, group_name, cache=False, case_insensitive=False):

        if case_insensitive:

            gr = cls.query()\

                .filter(cls.users_group_name.ilike(group_name))

        else:

            gr = cls.query()\

                .filter(cls.users_group_name == group_name)

        if cache:

            gr = gr.options(FromCache("sql_cache_short",

                                          "get_user_%s" % group_name))

        return gr.scalar()

    @classmethod

    def get(cls, users_group_id, cache=False):

        users_group = cls.query()

        if cache:

            users_group = users_group.options(FromCache("sql_cache_short",

                                    "get_users_group_%s" % users_group_id))

        return users_group.get(users_group_id)

    @classmethod

    def create(cls, form_data):

        try:

            new_users_group = cls()

            for k, v in form_data.items():

                setattr(new_users_group, k, v)

            Session.add(new_users_group)

            Session.commit()

            return new_users_group

        except:

            log.error(traceback.format_exc())

            Session.rollback()

            raise

    @classmethod

    def update(cls, users_group_id, form_data):

        try:

            users_group = cls.get(users_group_id, cache=False)

            for k, v in form_data.items():

                if k == 'users_group_members':

                    users_group.members = []

                    Session.flush()

                    members_list = []

                    if v:

                        v = [v] if isinstance(v, basestring) else v

                        for u_id in set(v):

                            member = UsersGroupMember(users_group_id, u_id)

                            members_list.append(member)

                    setattr(users_group, 'members', members_list)

                setattr(users_group, k, v)

            Session.add(users_group)

            Session.commit()

        except:

            log.error(traceback.format_exc())

            Session.rollback()

            raise

    @classmethod

    def delete(cls, users_group_id):

        try:

            # check if this group is not assigned to repo

            assigned_groups = UsersGroupRepoToPerm.query()\

                .filter(UsersGroupRepoToPerm.users_group_id ==

                        users_group_id).all()

            if assigned_groups:

                raise UsersGroupsAssignedException('RepoGroup assigned to %s' %

                                                   assigned_groups)

            users_group = cls.get(users_group_id, cache=False)

            Session.delete(users_group)

            Session.commit()

        except:

            log.error(traceback.format_exc())

            Session.rollback()

            raise

class UsersGroupMember(Base, BaseModel):

    __tablename__ = 'users_groups_members'

    __table_args__ = {'extend_existing':True}

    users_group_member_id = Column("users_group_member_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    users_group_id = Column("users_group_id", Integer(), ForeignKey('users_groups.users_group_id'), nullable=False, unique=None, default=None)

    user_id = Column("user_id", Integer(), ForeignKey('users.user_id'), nullable=False, unique=None, default=None)

    user = relationship('User', lazy='joined')

    users_group = relationship('UsersGroup')

    def __init__(self, gr_id='', u_id=''):

        self.users_group_id = gr_id

        self.user_id = u_id

    @staticmethod

    def add_user_to_group(group, user):

        ugm = UsersGroupMember()

        ugm.users_group = group

        ugm.user = user

        Session.add(ugm)

        Session.commit()

        return ugm

class Repository(Base, BaseModel):

    __tablename__ = 'repositories'

    __table_args__ = (UniqueConstraint('repo_name'), {'extend_existing':True},)

    repo_id = Column("repo_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    repo_name = Column("repo_name", String(length=255, convert_unicode=False, assert_unicode=None), nullable=False, unique=True, default=None)

    clone_uri = Column("clone_uri", String(length=255, convert_unicode=False, assert_unicode=None), nullable=True, unique=False, default=None)

    repo_type = Column("repo_type", String(length=255, convert_unicode=False, assert_unicode=None), nullable=False, unique=False, default='hg')

    user_id = Column("user_id", Integer(), ForeignKey('users.user_id'), nullable=False, unique=False, default=None)

    private = Column("private", Boolean(), nullable=True, unique=None, default=None)

    enable_statistics = Column("statistics", Boolean(), nullable=True, unique=None, default=True)

    enable_downloads = Column("downloads", Boolean(), nullable=True, unique=None, default=True)

    description = Column("description", String(length=10000, convert_unicode=False, assert_unicode=None), nullable=True, unique=None, default=None)

    created_on = Column('created_on', DateTime(timezone=False), nullable=True, unique=None, default=datetime.datetime.now)

    fork_id = Column("fork_id", Integer(), ForeignKey('repositories.repo_id'), nullable=True, unique=False, default=None)

    group_id = Column("group_id", Integer(), ForeignKey('groups.group_id'), nullable=True, unique=False, default=None)

    user = relationship('User')

    fork = relationship('Repository', remote_side=repo_id)

    group = relationship('RepoGroup')

    repo_to_perm = relationship('UserRepoToPerm', cascade='all', order_by='UserRepoToPerm.repo_to_perm_id')

    users_group_to_perm = relationship('UsersGroupRepoToPerm', cascade='all')

    stats = relationship('Statistics', cascade='all', uselist=False)

    followers = relationship('UserFollowing', primaryjoin='UserFollowing.follows_repo_id==Repository.repo_id', cascade='all')

    logs = relationship('UserLog', cascade='all')

    def __repr__(self):

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

                                  self.repo_id, self.repo_name)

    @classmethod

    def url_sep(cls):

        return '/'

    @classmethod

    def get_by_repo_name(cls, repo_name):

        q = Session.query(cls).filter(cls.repo_name == repo_name)

        q = q.options(joinedload(Repository.fork))\

                .options(joinedload(Repository.user))\

                .options(joinedload(Repository.group))

        return q.one()

    @classmethod

    def get_repo_forks(cls, repo_id):

        return cls.query().filter(Repository.fork_id == repo_id)

    @classmethod

    def base_path(cls):

        """

        Returns base path when all repos are stored

        :param cls:

        """

        q = Session.query(RhodeCodeUi).filter(RhodeCodeUi.ui_key ==

                                              cls.url_sep())

        q.options(FromCache("sql_cache_short", "repository_repo_path"))

        return q.one().ui_value

    @property

    def just_name(self):

        return self.repo_name.split(Repository.url_sep())[-1]

    @property

    def groups_with_parents(self):

        groups = []

        if self.group is None:

            return groups

        cur_gr = self.group

        groups.insert(0, cur_gr)

        while 1:

            gr = getattr(cur_gr, 'parent_group', None)

            cur_gr = cur_gr.parent_group

            if gr is None:

                break

            groups.insert(0, gr)

        return groups

    @property

    def groups_and_repo(self):

        return self.groups_with_parents, self.just_name

    @LazyProperty

    def repo_path(self):

        """

        Returns base full path for that repository means where it actually

        exists on a filesystem

        """

        q = Session.query(RhodeCodeUi).filter(RhodeCodeUi.ui_key ==

                                              Repository.url_sep())

        q.options(FromCache("sql_cache_short", "repository_repo_path"))

        return q.one().ui_value

    @property

    def repo_full_path(self):

        p = [self.repo_path]

        # we need to split the name by / since this is how we store the

        # names in the database, but that eventually needs to be converted

        # into a valid system path

        p += self.repo_name.split(Repository.url_sep())

        return os.path.join(*p)

    def get_new_name(self, repo_name):

        """

        returns new full repository name based on assigned group and new new

        :param group_name:

        """

        path_prefix = self.group.full_path_splitted if self.group else []

        return Repository.url_sep().join(path_prefix + [repo_name])

    @property

    def _ui(self):

        """

        Creates an db based ui object for this repository

        """

        from mercurial import ui

        from mercurial import config

        baseui = ui.ui()

        #clean the baseui object

        baseui._ocfg = config.config()

        baseui._ucfg = config.config()

        baseui._tcfg = config.config()

        ret = RhodeCodeUi.query()\

            .options(FromCache("sql_cache_short", "repository_repo_ui")).all()

        hg_ui = ret

        for ui_ in hg_ui:

            if ui_.ui_active:

                log.debug('settings ui from db[%s]%s:%s', ui_.ui_section,

                          ui_.ui_key, ui_.ui_value)

                baseui.setconfig(ui_.ui_section, ui_.ui_key, ui_.ui_value)

        return baseui

    @classmethod

    def is_valid(cls, repo_name):

        """

        returns True if given repo name is a valid filesystem repository

        @param cls:

        @param repo_name:

        """

        from rhodecode.lib.utils import is_valid_repo

        return is_valid_repo(repo_name, cls.base_path())

    #==========================================================================

    # SCM PROPERTIES

    #==========================================================================

    def get_changeset(self, rev):

        return get_changeset_safe(self.scm_instance, rev)

    @property

    def tip(self):

        return self.get_changeset('tip')

    @property

    def author(self):

        return self.tip.author

    @property

    def last_change(self):

        return self.scm_instance.last_change

    #==========================================================================

    # SCM CACHE INSTANCE

    #==========================================================================

    @property

    def invalidate(self):

        return CacheInvalidation.invalidate(self.repo_name)

    def set_invalidate(self):

        """

        set a cache for invalidation for this instance

        """

        CacheInvalidation.set_invalidate(self.repo_name)

    @LazyProperty

    def scm_instance(self):

        return self.__get_instance()

    @property

    def scm_instance_cached(self):

        @cache_region('long_term')

        def _c(repo_name):

            return self.__get_instance()

        rn = self.repo_name

        inv = self.invalidate

        if inv is not None:

            region_invalidate(_c, None, rn)

            # update our cache

            CacheInvalidation.set_valid(inv.cache_key)

        return _c(rn)

    def __get_instance(self):

        repo_full_path = self.repo_full_path

        try:

            alias = get_scm(repo_full_path)[0]

            log.debug('Creating instance of %s repository', alias)

            backend = get_backend(alias)

        except VCSError:

            log.error(traceback.format_exc())

            log.error('Perhaps this repository is in db and not in '

                      'filesystem run rescan repositories with '

                      '"destroy old data " option from admin panel')

            return

        if alias == 'hg':

            repo = backend(safe_str(repo_full_path), create=False,

                           baseui=self._ui)

            # skip hidden web repository

            if repo._get_hidden():

                return

        else:

            repo = backend(repo_full_path, create=False)

        return repo

class RepoGroup(Base, BaseModel):

    __tablename__ = 'groups'

    __table_args__ = (UniqueConstraint('group_name', 'group_parent_id'),

                      CheckConstraint('group_id != group_parent_id'), {'extend_existing':True},)

    __mapper_args__ = {'order_by':'group_name'}

    group_id = Column("group_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    group_name = Column("group_name", String(length=255, convert_unicode=False, assert_unicode=None), nullable=False, unique=True, default=None)

    group_parent_id = Column("group_parent_id", Integer(), ForeignKey('groups.group_id'), nullable=True, unique=None, default=None)

    group_description = Column("group_description", String(length=10000, convert_unicode=False, assert_unicode=None), nullable=True, unique=None, default=None)

    parent_group = relationship('RepoGroup', remote_side=group_id)

    def __init__(self, group_name='', parent_group=None):

        self.group_name = group_name

        self.parent_group = parent_group

    def __repr__(self):

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

                                  self.group_name)

    @classmethod

    def groups_choices(cls):

        from webhelpers.html import literal as _literal

        repo_groups = [('', '')]

        sep = ' » '

        _name = lambda k: _literal(sep.join(k))

        repo_groups.extend([(x.group_id, _name(x.full_path_splitted))

                              for x in cls.query().all()])

        repo_groups = sorted(repo_groups, key=lambda t: t[1].split(sep)[0])

        return repo_groups

    @classmethod

    def url_sep(cls):

        return '/'

    @classmethod

    def get_by_group_name(cls, group_name, cache=False, case_insensitive=False):

        if case_insensitive:

            gr = cls.query()\

                .filter(cls.group_name.ilike(group_name))

        else:

            gr = cls.query()\

                .filter(cls.group_name == group_name)

        if cache:

            gr = gr.options(FromCache("sql_cache_short",

                                          "get_group_%s" % group_name))

        return gr.scalar()

    @property

    def parents(self):

        parents_recursion_limit = 5

        groups = []

        if self.parent_group is None:

            return groups

        cur_gr = self.parent_group

        groups.insert(0, cur_gr)

        cnt = 0

        while 1:

            cnt += 1

            gr = getattr(cur_gr, 'parent_group', None)

            cur_gr = cur_gr.parent_group

            if gr is None:

                break

            if cnt == parents_recursion_limit:

                # this will prevent accidental infinit loops

                log.error('group nested more than %s' %

                          parents_recursion_limit)

                break

            groups.insert(0, gr)

        return groups

    @property

    def children(self):

        return RepoGroup.query().filter(RepoGroup.parent_group == self)

    @property

    def name(self):

        return self.group_name.split(RepoGroup.url_sep())[-1]

    @property

    def full_path(self):

        return self.group_name

    @property

    def full_path_splitted(self):

        return self.group_name.split(RepoGroup.url_sep())

    @property

    def repositories(self):

        return Repository.query().filter(Repository.group == self)

    @property

    def repositories_recursive_count(self):

        cnt = self.repositories.count()

        def children_count(group):

            cnt = 0

            for child in group.children:

                cnt += child.repositories.count()

                cnt += children_count(child)

            return cnt

        return cnt + children_count(self)

    def get_new_name(self, group_name):

        """

        returns new full group name based on parent and new name

        :param group_name:

        """

        path_prefix = (self.parent_group.full_path_splitted if

                       self.parent_group else [])

        return RepoGroup.url_sep().join(path_prefix + [group_name])

class Permission(Base, BaseModel):

    __tablename__ = 'permissions'

    __table_args__ = {'extend_existing':True}

    permission_id = Column("permission_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    permission_name = Column("permission_name", String(length=255, convert_unicode=False, assert_unicode=None), nullable=True, unique=None, default=None)

    permission_longname = Column("permission_longname", String(length=255, convert_unicode=False, assert_unicode=None), nullable=True, unique=None, default=None)

    def __repr__(self):

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

                                  self.permission_id, self.permission_name)

    @classmethod

    def get_by_key(cls, key):

        return cls.query().filter(cls.permission_name == key).scalar()

class UserRepoToPerm(Base, BaseModel):

    __tablename__ = 'repo_to_perm'

    __table_args__ = (UniqueConstraint('user_id', 'repository_id'), {'extend_existing':True})

    repo_to_perm_id = Column("repo_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    user_id = Column("user_id", Integer(), ForeignKey('users.user_id'), nullable=False, unique=None, default=None)

    permission_id = Column("permission_id", Integer(), ForeignKey('permissions.permission_id'), nullable=False, unique=None, default=None)

    repository_id = Column("repository_id", Integer(), ForeignKey('repositories.repo_id'), nullable=False, unique=None, default=None)

    user = relationship('User')

    permission = relationship('Permission')

    repository = relationship('Repository')

class UserToPerm(Base, BaseModel):

    __tablename__ = 'user_to_perm'

    __table_args__ = (UniqueConstraint('user_id', 'permission_id'), {'extend_existing':True})

    user_to_perm_id = Column("user_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    user_id = Column("user_id", Integer(), ForeignKey('users.user_id'), nullable=False, unique=None, default=None)

    permission_id = Column("permission_id", Integer(), ForeignKey('permissions.permission_id'), nullable=False, unique=None, default=None)

    user = relationship('User')

    permission = relationship('Permission')

    @classmethod

    def has_perm(cls, user_id, perm):

        if not isinstance(perm, Permission):

            raise Exception('perm needs to be an instance of Permission class')

        return cls.query().filter(cls.user_id == user_id)\

            .filter(cls.permission == perm).scalar() is not None

    @classmethod

    def grant_perm(cls, user_id, perm):

        if not isinstance(perm, Permission):

            raise Exception('perm needs to be an instance of Permission class')

        new = cls()

        new.user_id = user_id

        new.permission = perm

        try:

            Session.add(new)

            Session.commit()

        except:

            Session.rollback()

    @classmethod

    def revoke_perm(cls, user_id, perm):

        if not isinstance(perm, Permission):

            raise Exception('perm needs to be an instance of Permission class')

        try:

            cls.query().filter(cls.user_id == user_id)\

                .filter(cls.permission == perm).delete()

            Session.commit()

        except:

            Session.rollback()

class UsersGroupRepoToPerm(Base, BaseModel):

    __tablename__ = 'users_group_repo_to_perm'

    __table_args__ = (UniqueConstraint('repository_id', 'users_group_id', 'permission_id'), {'extend_existing':True})

    users_group_to_perm_id = Column("users_group_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    users_group_id = Column("users_group_id", Integer(), ForeignKey('users_groups.users_group_id'), nullable=False, unique=None, default=None)

    permission_id = Column("permission_id", Integer(), ForeignKey('permissions.permission_id'), nullable=False, unique=None, default=None)

    repository_id = Column("repository_id", Integer(), ForeignKey('repositories.repo_id'), nullable=False, unique=None, default=None)

    users_group = relationship('UsersGroup')

    permission = relationship('Permission')

    repository = relationship('Repository')

    def __repr__(self):

        return '<userGroup:%s => %s >' % (self.users_group, self.repository)

class UsersGroupToPerm(Base, BaseModel):

    __tablename__ = 'users_group_to_perm'

    users_group_to_perm_id = Column("users_group_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    users_group_id = Column("users_group_id", Integer(), ForeignKey('users_groups.users_group_id'), nullable=False, unique=None, default=None)

    permission_id = Column("permission_id", Integer(), ForeignKey('permissions.permission_id'), nullable=False, unique=None, default=None)

    users_group = relationship('UsersGroup')

    permission = relationship('Permission')

    @classmethod

    def has_perm(cls, users_group_id, perm):

        if not isinstance(perm, Permission):

            raise Exception('perm needs to be an instance of Permission class')

        return cls.query().filter(cls.users_group_id ==

                                         users_group_id)\

                                         .filter(cls.permission == perm)\

                                         .scalar() is not None

    @classmethod

    def grant_perm(cls, users_group_id, perm):

        if not isinstance(perm, Permission):

            raise Exception('perm needs to be an instance of Permission class')

        new = cls()

        new.users_group_id = users_group_id

        new.permission = perm

        try:

            Session.add(new)

            Session.commit()

        except:

            Session.rollback()

    @classmethod

    def revoke_perm(cls, users_group_id, perm):

        if not isinstance(perm, Permission):

            raise Exception('perm needs to be an instance of Permission class')

        try:

            cls.query().filter(cls.users_group_id == users_group_id)\

                .filter(cls.permission == perm).delete()

            Session.commit()

        except:

            Session.rollback()

class UserRepoGroupToPerm(Base, BaseModel):

    __tablename__ = 'group_to_perm'

    __table_args__ = (UniqueConstraint('group_id', 'permission_id'), {'extend_existing':True})

    group_to_perm_id = Column("group_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    user_id = Column("user_id", Integer(), ForeignKey('users.user_id'), nullable=False, unique=None, default=None)

    permission_id = Column("permission_id", Integer(), ForeignKey('permissions.permission_id'), nullable=False, unique=None, default=None)

    group_id = Column("group_id", Integer(), ForeignKey('groups.group_id'), nullable=False, unique=None, default=None)

    user = relationship('User')

    permission = relationship('Permission')

    group = relationship('RepoGroup')

class UsersGroupRepoGroupToPerm(Base, BaseModel):

    __tablename__ = 'users_group_repo_group_to_perm'

    __table_args__ = (UniqueConstraint('group_id', 'permission_id'), {'extend_existing':True})

    users_group_repo_group_to_perm_id = Column("users_group_repo_group_to_perm_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    users_group_id = Column("users_group_id", Integer(), ForeignKey('users_groups.users_group_id'), nullable=False, unique=None, default=None)

    permission_id = Column("permission_id", Integer(), ForeignKey('permissions.permission_id'), nullable=False, unique=None, default=None)

    group_id = Column("group_id", Integer(), ForeignKey('groups.group_id'), nullable=False, unique=None, default=None)

    users_group = relationship('UsersGroup')

    permission = relationship('Permission')

    group = relationship('RepoGroup')

class Statistics(Base, BaseModel):

    __tablename__ = 'statistics'

    __table_args__ = (UniqueConstraint('repository_id'), {'extend_existing':True})

    stat_id = Column("stat_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    repository_id = Column("repository_id", Integer(), ForeignKey('repositories.repo_id'), nullable=False, unique=True, default=None)

    stat_on_revision = Column("stat_on_revision", Integer(), nullable=False)

    commit_activity = Column("commit_activity", LargeBinary(1000000), nullable=False)#JSON data

    commit_activity_combined = Column("commit_activity_combined", LargeBinary(), nullable=False)#JSON data

    languages = Column("languages", LargeBinary(1000000), nullable=False)#JSON data

    repository = relationship('Repository', single_parent=True)

class UserFollowing(Base, BaseModel):

    __tablename__ = 'user_followings'

    __table_args__ = (UniqueConstraint('user_id', 'follows_repository_id'),

                      UniqueConstraint('user_id', 'follows_user_id')

                      , {'extend_existing':True})

    user_following_id = Column("user_following_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    user_id = Column("user_id", Integer(), ForeignKey('users.user_id'), nullable=False, unique=None, default=None)

    follows_repo_id = Column("follows_repository_id", Integer(), ForeignKey('repositories.repo_id'), nullable=True, unique=None, default=None)

    follows_user_id = Column("follows_user_id", Integer(), ForeignKey('users.user_id'), nullable=True, unique=None, default=None)

    follows_from = Column('follows_from', DateTime(timezone=False), nullable=True, unique=None, default=datetime.datetime.now)

    user = relationship('User', primaryjoin='User.user_id==UserFollowing.user_id')

    follows_user = relationship('User', primaryjoin='User.user_id==UserFollowing.follows_user_id')

    follows_repository = relationship('Repository', order_by='Repository.repo_name')

    @classmethod

    def get_repo_followers(cls, repo_id):

        return cls.query().filter(cls.follows_repo_id == repo_id)

class CacheInvalidation(Base, BaseModel):

    __tablename__ = 'cache_invalidation'

    __table_args__ = (UniqueConstraint('cache_key'), {'extend_existing':True})

    cache_id = Column("cache_id", Integer(), nullable=False, unique=True, default=None, primary_key=True)

    cache_key = Column("cache_key", String(length=255, convert_unicode=False, assert_unicode=None), nullable=True, unique=None, default=None)

    cache_args = Column("cache_args", String(length=255, convert_unicode=False, assert_unicode=None), nullable=True, unique=None, default=None)

    cache_active = Column("cache_active", Boolean(), nullable=True, unique=None, default=False)

    def __init__(self, cache_key, cache_args=''):

        self.cache_key = cache_key

        self.cache_args = cache_args

        self.cache_active = False

    def __repr__(self):

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

                                  self.cache_id, self.cache_key)

    @classmethod

    def invalidate(cls, key):

        """

        Returns Invalidation object if this given key should be invalidated

        None otherwise. `cache_active = False` means that this cache

        state is not valid and needs to be invalidated

        :param key:

        """

        return cls.query()\

                .filter(CacheInvalidation.cache_key == key)\

                .filter(CacheInvalidation.cache_active == False)\

                .scalar()

    @classmethod

    def set_invalidate(cls, key):

        """

        Mark this Cache key for invalidation

        :param key:

        """

        log.debug('marking %s for invalidation' % key)

        inv_obj = Session().query(cls)\

            .filter(cls.cache_key == key).scalar()

        if inv_obj:

            inv_obj.cache_active = False

        else:

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

            inv_obj = CacheInvalidation(key)

        try:

            Session.add(inv_obj)

            Session.commit()

        except Exception:

            log.error(traceback.format_exc())

            Session.rollback()

    @classmethod

    def set_valid(cls, key):

        """

        Mark this cache key as active and currently cached

        :param key:

        """

        inv_obj = Session().query(CacheInvalidation)\

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

        inv_obj.cache_active = True

        Session.add(inv_obj)

        Session.commit()

class ChangesetComment(Base, BaseModel):

    __tablename__ = 'changeset_comments'

    __table_args__ = ({'extend_existing':True},)

    comment_id = Column('comment_id', Integer(), nullable=False, primary_key=True)

    repo_id = Column('repo_id', Integer(), ForeignKey('repositories.repo_id'), nullable=False)