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

# 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/>.

"""

kallithea.lib.hooks

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

Hooks run by Kallithea

This file was forked by the Kallithea project in July 2014.

Original author and date, and relevant copyright and licensing information is below:

:created_on: Aug 6, 2010

:author: marcink

:copyright: (c) 2013 RhodeCode GmbH, and others.

:license: GPLv3, see LICENSE.md for more details.

"""

import os

import time

import binascii

from kallithea.lib.vcs.utils.hgcompat import nullrev, revrange

from kallithea.lib import helpers as h

from kallithea.lib.utils import action_logger

from kallithea.lib.vcs.backends.base import EmptyChangeset

from kallithea.lib.exceptions import HTTPLockedRC, UserCreationError

from kallithea.lib.utils2 import safe_str, safe_unicode, _extract_extras

def _get_scm_size(alias, root_path):

    if not alias.startswith('.'):

        alias += '.'

    size_scm, size_root = 0, 0

    for path, dirs, files in os.walk(safe_str(root_path)):

        if path.find(alias) != -1:

            for f in files:

                try:

                    size_scm += os.path.getsize(os.path.join(path, f))

                except OSError:

                    pass

        else:

            for f in files:

                try:

                    size_root += os.path.getsize(os.path.join(path, f))

                except OSError:

                    pass

    size_scm_f = h.format_byte_size(size_scm)

    size_root_f = h.format_byte_size(size_root)

    size_total_f = h.format_byte_size(size_root + size_scm)

    return size_scm_f, size_root_f, size_total_f

def repo_size(ui, repo, hooktype=None, **kwargs):

    """Presents size of repository after push"""

    size_hg_f, size_root_f, size_total_f = _get_scm_size('.hg', repo.root)

    last_cs = repo[len(repo) - 1]

    msg = ('Repository size .hg: %s Checkout: %s Total: %s\n'

           'Last revision is now r%s:%s\n') % (

        size_hg_f, size_root_f, size_total_f, last_cs.rev(), last_cs.hex()[:12]

    )

    ui.status(msg)

def push_lock_handling(ui, repo, **kwargs):

    """Pre push function, currently used to ban pushing when repository is locked.

    Called as Mercurial hook prechangegroup.push_lock_handling or from the Git pre-receive hook calling handle_git_pre_receive.

    """

    ex = _extract_extras()

    usr = User.get_by_username(ex.username)

    if ex.locked_by[0] and usr.user_id != int(ex.locked_by[0]):

        locked_by = User.get(ex.locked_by[0]).username

        # this exception is interpreted in git/hg middlewares and based

        # on that proper return code is server to client

        _http_ret = HTTPLockedRC(ex.repository, locked_by)

        if str(_http_ret.code).startswith('2'):

            # 2xx Codes don't raise exceptions

            ui.status(safe_str(_http_ret.title))

        else:

            raise _http_ret

def pull_lock_handling(ui, repo, **kwargs):

    """Called as Mercurial hook preoutgoing.pull_lock_handling or from Kallithea before invoking Git"""

    # pre pull function ...

    ex = _extract_extras()

    if ex.locked_by[0]:

        locked_by = User.get(ex.locked_by[0]).username

        # this exception is interpreted in git/hg middlewares and based

        # on that proper return code is server to client

        _http_ret = HTTPLockedRC(ex.repository, locked_by)

        if str(_http_ret.code).startswith('2'):

            # 2xx Codes don't raise exceptions

            ui.status(safe_str(_http_ret.title))

        else:

            raise _http_ret

def log_pull_action(ui, repo, **kwargs):

    """Logs user last pull action, and also handle locking

    Called as Mercurial hook outgoing.pull_logger or from Kallithea before invoking Git.

    """

    ex = _extract_extras()

    user = User.get_by_username(ex.username)

    action = 'pull'

    action_logger(user, action, ex.repository, ex.ip, commit=True)

    # extension hook call

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'PULL_HOOK', None)

    if callable(callback):

        kw = {}

        kw.update(ex)

        callback(**kw)

    if ex.make_lock is not None and ex.make_lock:

        Repository.lock(Repository.get_by_repo_name(ex.repository), user.user_id)

        #msg = 'Made lock on repo `%s`' % repository

        #ui.status(msg)

    if ex.locked_by[0]:

        locked_by = User.get(ex.locked_by[0]).username

        _http_ret = HTTPLockedRC(ex.repository, locked_by)

        if str(_http_ret.code).startswith('2'):

            # 2xx Codes don't raise exceptions

            ui.status(safe_str(_http_ret.title))

    return 0

def log_push_action(ui, repo, **kwargs):

    """

    Register that changes have been pushed.

    Called as Mercurial hook changegroup.push_logger or from the Git post-receive hook calling handle_git_post_receive ... or from scm _handle_push

    """

    ex = _extract_extras()

    action_tmpl = ex.action + ':%s'

    revs = []

    if ex.scm == 'hg':

        node = kwargs['node']

        def get_revs(repo, rev_opt):

            if rev_opt:

                revs = revrange(repo, rev_opt)

                if len(revs) == 0:

                    return (nullrev, nullrev)

                return max(revs), min(revs)

            else:

                return len(repo) - 1, 0

        stop, start = get_revs(repo, [node + ':'])

        _h = binascii.hexlify

        revs = [_h(repo[r].node()) for r in xrange(start, stop + 1)]

    elif ex.scm == 'git':

        revs = kwargs.get('_git_revs', [])

        if '_git_revs' in kwargs:

            kwargs.pop('_git_revs')

    action = action_tmpl % ','.join(revs)

    action_logger(ex.username, action, ex.repository, ex.ip, commit=True)

    # extension hook call

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'PUSH_HOOK', None)

    if callable(callback):

        kw = {'pushed_revs': revs}

        kw.update(ex)

        callback(**kw)

    if ex.make_lock is not None and not ex.make_lock:

        Repository.unlock(Repository.get_by_repo_name(ex.repository))

        ui.status(safe_str('Released lock on repo `%s`\n' % ex.repository))

    if ex.locked_by[0]:

        locked_by = User.get(ex.locked_by[0]).username

        _http_ret = HTTPLockedRC(ex.repository, locked_by)

        if str(_http_ret.code).startswith('2'):

            # 2xx Codes don't raise exceptions

            ui.status(safe_str(_http_ret.title))

    return 0

def log_create_repository(repository_dict, created_by, **kwargs):

    """

    Post create repository Hook.

    :param repository: dict dump of repository object

    :param created_by: username who created repository

    available keys of repository_dict:

     'repo_type',

     'description',

     'private',

     'created_on',

     'enable_downloads',

     'repo_id',

     'owner_id',

     'enable_statistics',

     'clone_uri',

     'fork_id',

     'group_id',

     'repo_name'

    """

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'CREATE_REPO_HOOK', None)

    if callable(callback):

        kw = {}

        kw.update(repository_dict)

        kw.update({'created_by': created_by})

        kw.update(kwargs)

        return callback(**kw)

    return 0

def check_allowed_create_user(user_dict, created_by, **kwargs):

    # pre create hooks

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'PRE_CREATE_USER_HOOK', None)

    if callable(callback):

        allowed, reason = callback(created_by=created_by, **user_dict)

        if not allowed:

            raise UserCreationError(reason)

def log_create_user(user_dict, created_by, **kwargs):

    """

    Post create user Hook.

    :param user_dict: dict dump of user object

    available keys for user_dict:

     'username',

     'full_name_or_username',

     'full_contact',

     'user_id',

     'name',

     'firstname',

     'short_contact',

     'admin',

     'lastname',

     'ip_addresses',

     'ldap_dn',

     'email',

     'api_key',

     'last_login',

     'full_name',

     'active',

     'password',

     'emails',

     'inherit_default_permissions'

    """

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'CREATE_USER_HOOK', None)

    if callable(callback):

        return callback(created_by=created_by, **user_dict)

    return 0

def log_delete_repository(repository_dict, deleted_by, **kwargs):

    """

    Post delete repository Hook.

    :param repository: dict dump of repository object

    :param deleted_by: username who deleted the repository

    available keys of repository_dict:

     'repo_type',

     'description',

     'private',

     'created_on',

     'enable_downloads',

     'repo_id',

     'owner_id',

     'enable_statistics',

     'clone_uri',

     'fork_id',

     'group_id',

     'repo_name'

    """

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'DELETE_REPO_HOOK', None)

    if callable(callback):

        kw = {}

        kw.update(repository_dict)

        kw.update({'deleted_by': deleted_by,

                   'deleted_on': time.time()})

        kw.update(kwargs)

        return callback(**kw)

    return 0

def log_delete_user(user_dict, deleted_by, **kwargs):

    """

    Post delete user Hook.

    :param user_dict: dict dump of user object

    available keys for user_dict:

     'username',

     'full_name_or_username',

     'full_contact',

     'user_id',

     'name',

     'firstname',

     'short_contact',

     'admin',

     'lastname',

     'ip_addresses',

     'ldap_dn',

     'email',

     'api_key',

     'last_login',

     'full_name',

     'active',

     'password',

     'emails',

     'inherit_default_permissions'

    """

    from kallithea import EXTENSIONS

    callback = getattr(EXTENSIONS, 'DELETE_USER_HOOK', None)

    if callable(callback):

        return callback(deleted_by=deleted_by, **user_dict)

    return 0

def handle_git_pre_receive(repo_path, git_stdin_lines, env):

    """Called from Git pre-receive hook"""

    return handle_git_receive(repo_path, git_stdin_lines, env, hook_type='pre')

def handle_git_post_receive(repo_path, git_stdin_lines, env):

    """Called from Git post-receive hook"""

    return handle_git_receive(repo_path, git_stdin_lines, env, hook_type='post')

    """

    """

    from paste.deploy import appconfig

    from sqlalchemy import engine_from_config

    from kallithea.config.environment import load_environment

    from kallithea.model.base import init_model

    extras = _extract_extras(env)

    path, ini_name = os.path.split(extras['config'])

    conf = appconfig('config:%s' % ini_name, relative_to=path)

    conf = load_environment(conf.global_conf, conf.local_conf)

    setup_cache_regions(conf)

    engine = engine_from_config(conf, 'sqlalchemy.')

    init_model(engine)

    repo_path = safe_unicode(repo_path)

    # fix if it's not a bare repo

    if repo_path.endswith(os.sep + '.git'):

        repo_path = repo_path[:-5]

    repo = Repository.get_by_full_path(repo_path)

    if not repo:

        raise OSError('Repository %s not found in database'

                      % (safe_str(repo_path)))

    baseui = make_ui('db')

    if hook_type == 'pre':

        scm_repo = repo.scm_instance

    else:

        # post push should never use the cached instance

        scm_repo = repo.scm_instance_no_cache()

    _hooks = dict(baseui.configitems('hooks')) or {}

    if hook_type == 'pre':

        push_lock_handling(baseui, scm_repo)

    # if push hook is enabled via web interface

    elif hook_type == 'post' and _hooks.get(Ui.HOOK_PUSH_LOG):

        rev_data = []

        for l in git_stdin_lines:

            old_rev, new_rev, ref = l.strip().split(' ')

            _ref_data = ref.split('/')

            if _ref_data[1] in ['tags', 'heads']:

                rev_data.append({'old_rev': old_rev,

                                 'new_rev': new_rev,

                                 'ref': ref,

                                 'type': _ref_data[1],

                                 'name': '/'.join(_ref_data[2:])})

        git_revs = []

        for push_ref in rev_data:

            _type = push_ref['type']

            if _type == 'heads':

                if push_ref['old_rev'] == EmptyChangeset().raw_id:

                    # update the symbolic ref if we push new repo

                    if scm_repo.is_empty():

                        scm_repo._repo.refs.set_symbolic_ref('HEAD',

                                            'refs/heads/%s' % push_ref['name'])

                    cmd = ['for-each-ref', '--format=%(refname)', 'refs/heads/*']

                    heads = scm_repo.run_git_command(cmd)[0]

                    cmd = ['log', push_ref['new_rev'],

                           '--reverse', '--pretty=format:%H', '--not']

                    heads = heads.replace(push_ref['ref'], '')

                    for l in heads.splitlines():

                        cmd.append(l.strip())

                    git_revs += scm_repo.run_git_command(cmd)[0].splitlines()

                elif push_ref['new_rev'] == EmptyChangeset().raw_id:

                    # delete branch case

                    git_revs += ['delete_branch=>%s' % push_ref['name']]

                else:

                    cmd = ['log', '%(old_rev)s..%(new_rev)s' % push_ref,

                           '--reverse', '--pretty=format:%H']

                    git_revs += scm_repo.run_git_command(cmd)[0].splitlines()

            elif _type == 'tags':

                git_revs += ['tag=>%s' % push_ref['name']]

        log_push_action(baseui, scm_repo, _git_revs=git_revs)