pull request: send live notification when PR update happens

rhodecode/controllers/pullrequests.py

@@ -1,855 +1,885 b''
 # -*- coding: utf-8 -*-
 
 # Copyright (C) 2012-2016  RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License, version 3
 # (only), as published by the Free Software Foundation.
 #
 # 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 Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 # This program is dual-licensed. If you wish to learn more about the
 # RhodeCode Enterprise Edition, including its added features, Support services,
 # and proprietary license terms, please see https://rhodecode.com/licenses/
 
 """
 pull requests controller for rhodecode for initializing pull requests
 """
 
 import formencode
 import logging
 
 from webob.exc import HTTPNotFound, HTTPForbidden, HTTPBadRequest
 from pylons import request, tmpl_context as c, url
 from pylons.controllers.util import redirect
 from pylons.i18n.translation import _
+from pyramid.threadlocal import get_current_registry
 from sqlalchemy.sql import func
 from sqlalchemy.sql.expression import or_
 
 from rhodecode import events
 from rhodecode.lib import auth, diffs, helpers as h
 from rhodecode.lib.ext_json import json
 from rhodecode.lib.base import (
     BaseRepoController, render, vcs_operation_context)
 from rhodecode.lib.auth import (
     LoginRequired, HasRepoPermissionAnyDecorator, NotAnonymous,
     HasAcceptedRepoType, XHRRequired)
+from rhodecode.lib.channelstream import channelstream_request
 from rhodecode.lib.utils import jsonify
 from rhodecode.lib.utils2 import safe_int, safe_str, str2bool, safe_unicode
 from rhodecode.lib.vcs.backends.base import EmptyCommit
 from rhodecode.lib.vcs.exceptions import (
     EmptyRepositoryError, CommitDoesNotExistError, RepositoryRequirementError)
 from rhodecode.lib.diffs import LimitedDiffContainer
 from rhodecode.model.changeset_status import ChangesetStatusModel
 from rhodecode.model.comment import ChangesetCommentsModel
 from rhodecode.model.db import PullRequest, ChangesetStatus, ChangesetComment, \
     Repository
 from rhodecode.model.forms import PullRequestForm
 from rhodecode.model.meta import Session
 from rhodecode.model.pull_request import PullRequestModel
 
 log = logging.getLogger(__name__)
 
 
 class PullrequestsController(BaseRepoController):
     def __before__(self):
         super(PullrequestsController, self).__before__()
 
     def _load_compare_data(self, pull_request, enable_comments=True):
         """
         Load context data needed for generating compare diff
 
         :param pull_request: object related to the request
         :param enable_comments: flag to determine if comments are included
         """
         source_repo = pull_request.source_repo
         source_ref_id = pull_request.source_ref_parts.commit_id
 
         target_repo = pull_request.target_repo
         target_ref_id = pull_request.target_ref_parts.commit_id
 
         # despite opening commits for bookmarks/branches/tags, we always
         # convert this to rev to prevent changes after bookmark or branch change
         c.source_ref_type = 'rev'
         c.source_ref = source_ref_id
 
         c.target_ref_type = 'rev'
         c.target_ref = target_ref_id
 
         c.source_repo = source_repo
         c.target_repo = target_repo
 
         c.fulldiff = bool(request.GET.get('fulldiff'))
 
         # diff_limit is the old behavior, will cut off the whole diff
         # if the limit is applied  otherwise will just hide the
         # big files from the front-end
         diff_limit = self.cut_off_limit_diff
         file_limit = self.cut_off_limit_file
 
         pre_load = ["author", "branch", "date", "message"]
 
         c.commit_ranges = []
         source_commit = EmptyCommit()
         target_commit = EmptyCommit()
         c.missing_requirements = False
         try:
             c.commit_ranges = [
                 source_repo.get_commit(commit_id=rev, pre_load=pre_load)
                 for rev in pull_request.revisions]
 
             c.statuses = source_repo.statuses(
                 [x.raw_id for x in c.commit_ranges])
 
             target_commit = source_repo.get_commit(
                 commit_id=safe_str(target_ref_id))
             source_commit = source_repo.get_commit(
                 commit_id=safe_str(source_ref_id))
         except RepositoryRequirementError:
             c.missing_requirements = True
 
         c.missing_commits = False
         if (c.missing_requirements or
                 isinstance(source_commit, EmptyCommit) or
                     source_commit == target_commit):
             _parsed = []
             c.missing_commits = True
         else:
             vcs_diff = PullRequestModel().get_diff(pull_request)
             diff_processor = diffs.DiffProcessor(
                 vcs_diff, format='gitdiff', diff_limit=diff_limit,
                 file_limit=file_limit, show_full_diff=c.fulldiff)
             _parsed = diff_processor.prepare()
 
         c.limited_diff = isinstance(_parsed, LimitedDiffContainer)
 
         c.files = []
         c.changes = {}
         c.lines_added = 0
         c.lines_deleted = 0
         c.included_files = []
         c.deleted_files = []
 
         for f in _parsed:
             st = f['stats']
             c.lines_added += st['added']
             c.lines_deleted += st['deleted']
 
             fid = h.FID('', f['filename'])
             c.files.append([fid, f['operation'], f['filename'], f['stats']])
             c.included_files.append(f['filename'])
             html_diff = diff_processor.as_html(enable_comments=enable_comments,
                                                parsed_lines=[f])
             c.changes[fid] = [f['operation'], f['filename'], html_diff, f]
 
     def _extract_ordering(self, request):
         column_index = safe_int(request.GET.get('order[0][column]'))
         order_dir = request.GET.get('order[0][dir]', 'desc')
         order_by = request.GET.get(
             'columns[%s][data][sort]' % column_index, 'name_raw')
         return order_by, order_dir
 
     @LoginRequired()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @HasAcceptedRepoType('git', 'hg')
     def show_all(self, repo_name):
         # filter types
         c.active = 'open'
         c.source = str2bool(request.GET.get('source'))
         c.closed = str2bool(request.GET.get('closed'))
         c.my = str2bool(request.GET.get('my'))
         c.awaiting_review = str2bool(request.GET.get('awaiting_review'))
         c.awaiting_my_review = str2bool(request.GET.get('awaiting_my_review'))
         c.repo_name = repo_name
 
         opened_by = None
         if c.my:
             c.active = 'my'
             opened_by = [c.rhodecode_user.user_id]
 
         statuses = [PullRequest.STATUS_NEW, PullRequest.STATUS_OPEN]
         if c.closed:
             c.active = 'closed'
             statuses = [PullRequest.STATUS_CLOSED]
 
         if c.awaiting_review and not c.source:
             c.active = 'awaiting'
         if c.source and not c.awaiting_review:
             c.active = 'source'
         if c.awaiting_my_review:
             c.active = 'awaiting_my'
 
         data = self._get_pull_requests_list(
             repo_name=repo_name, opened_by=opened_by, statuses=statuses)
         if not request.is_xhr:
             c.data = json.dumps(data['data'])
             c.records_total = data['recordsTotal']
             return render('/pullrequests/pullrequests.html')
         else:
             return json.dumps(data)
 
     def _get_pull_requests_list(self, repo_name, opened_by, statuses):
         # pagination
         start = safe_int(request.GET.get('start'), 0)
         length = safe_int(request.GET.get('length'), c.visual.dashboard_items)
         order_by, order_dir = self._extract_ordering(request)
 
         if c.awaiting_review:
             pull_requests = PullRequestModel().get_awaiting_review(
                 repo_name, source=c.source, opened_by=opened_by,
                 statuses=statuses, offset=start, length=length,
                 order_by=order_by, order_dir=order_dir)
             pull_requests_total_count = PullRequestModel(
             ).count_awaiting_review(
                 repo_name, source=c.source, statuses=statuses,
                 opened_by=opened_by)
         elif c.awaiting_my_review:
             pull_requests = PullRequestModel().get_awaiting_my_review(
                 repo_name, source=c.source, opened_by=opened_by,
                 user_id=c.rhodecode_user.user_id, statuses=statuses,
                 offset=start, length=length, order_by=order_by,
                 order_dir=order_dir)
             pull_requests_total_count = PullRequestModel(
             ).count_awaiting_my_review(
                 repo_name, source=c.source, user_id=c.rhodecode_user.user_id,
                 statuses=statuses, opened_by=opened_by)
         else:
             pull_requests = PullRequestModel().get_all(
                 repo_name, source=c.source, opened_by=opened_by,
                 statuses=statuses, offset=start, length=length,
                 order_by=order_by, order_dir=order_dir)
             pull_requests_total_count = PullRequestModel().count_all(
                 repo_name, source=c.source, statuses=statuses,
                 opened_by=opened_by)
 
         from rhodecode.lib.utils import PartialRenderer
         _render = PartialRenderer('data_table/_dt_elements.html')
         data = []
         for pr in pull_requests:
             comments = ChangesetCommentsModel().get_all_comments(
                 c.rhodecode_db_repo.repo_id, pull_request=pr)
 
             data.append({
                 'name': _render('pullrequest_name',
                                 pr.pull_request_id, pr.target_repo.repo_name),
                 'name_raw': pr.pull_request_id,
                 'status': _render('pullrequest_status',
                                   pr.calculated_review_status()),
                 'title': _render(
                     'pullrequest_title', pr.title, pr.description),
                 'description': h.escape(pr.description),
                 'updated_on': _render('pullrequest_updated_on',
                                       h.datetime_to_time(pr.updated_on)),
                 'updated_on_raw': h.datetime_to_time(pr.updated_on),
                 'created_on': _render('pullrequest_updated_on',
                                       h.datetime_to_time(pr.created_on)),
                 'created_on_raw': h.datetime_to_time(pr.created_on),
                 'author': _render('pullrequest_author',
                                   pr.author.full_contact, ),
                 'author_raw': pr.author.full_name,
                 'comments': _render('pullrequest_comments', len(comments)),
                 'comments_raw': len(comments),
                 'closed': pr.is_closed(),
             })
         # json used to render the grid
         data = ({
             'data': data,
             'recordsTotal': pull_requests_total_count,
             'recordsFiltered': pull_requests_total_count,
         })
         return data
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @HasAcceptedRepoType('git', 'hg')
     def index(self):
         source_repo = c.rhodecode_db_repo
 
         try:
             source_repo.scm_instance().get_commit()
         except EmptyRepositoryError:
             h.flash(h.literal(_('There are no commits yet')),
                     category='warning')
             redirect(url('summary_home', repo_name=source_repo.repo_name))
 
         commit_id = request.GET.get('commit')
         branch_ref = request.GET.get('branch')
         bookmark_ref = request.GET.get('bookmark')
 
         try:
             source_repo_data = PullRequestModel().generate_repo_data(
                 source_repo, commit_id=commit_id,
                 branch=branch_ref, bookmark=bookmark_ref)
         except CommitDoesNotExistError as e:
             log.exception(e)
             h.flash(_('Commit does not exist'), 'error')
             redirect(url('pullrequest_home', repo_name=source_repo.repo_name))
 
         default_target_repo = source_repo
         if (source_repo.parent and
                 not source_repo.parent.scm_instance().is_empty()):
             # change default if we have a parent repo
             default_target_repo = source_repo.parent
 
         target_repo_data = PullRequestModel().generate_repo_data(
             default_target_repo)
 
         selected_source_ref = source_repo_data['refs']['selected_ref']
 
         title_source_ref = selected_source_ref.split(':', 2)[1]
         c.default_title = PullRequestModel().generate_pullrequest_title(
             source=source_repo.repo_name,
             source_ref=title_source_ref,
             target=default_target_repo.repo_name
         )
 
         c.default_repo_data = {
             'source_repo_name': source_repo.repo_name,
             'source_refs_json': json.dumps(source_repo_data),
             'target_repo_name': default_target_repo.repo_name,
             'target_refs_json': json.dumps(target_repo_data),
         }
         c.default_source_ref = selected_source_ref
 
         return render('/pullrequests/pullrequest.html')
 
     @LoginRequired()
     @NotAnonymous()
     @XHRRequired()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @jsonify
     def get_repo_refs(self, repo_name, target_repo_name):
         repo = Repository.get_by_repo_name(target_repo_name)
         if not repo:
             raise HTTPNotFound
         return PullRequestModel().generate_repo_data(repo)
 
     @LoginRequired()
     @NotAnonymous()
     @XHRRequired()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @jsonify
     def get_repo_destinations(self, repo_name):
         repo = Repository.get_by_repo_name(repo_name)
         if not repo:
             raise HTTPNotFound
         filter_query = request.GET.get('query')
 
         query = Repository.query() \
             .order_by(func.length(Repository.repo_name)) \
             .filter(or_(
             Repository.repo_name == repo.repo_name,
             Repository.fork_id == repo.repo_id))
 
         if filter_query:
             ilike_expression = u'%{}%'.format(safe_unicode(filter_query))
             query = query.filter(
                 Repository.repo_name.ilike(ilike_expression))
 
         add_parent = False
         if repo.parent:
             if filter_query in repo.parent.repo_name:
                 if not repo.parent.scm_instance().is_empty():
                     add_parent = True
 
         limit = 20 - 1 if add_parent else 20
         all_repos = query.limit(limit).all()
         if add_parent:
             all_repos += [repo.parent]
 
         repos = []
         for obj in self.scm_model.get_repos(all_repos):
             repos.append({
                 'id': obj['name'],
                 'text': obj['name'],
                 'type': 'repo',
                 'obj': obj['dbrepo']
             })
 
         data = {
             'more': False,
             'results': [{
                 'text': _('Repositories'),
                 'children': repos
             }] if repos else []
         }
         return data
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @HasAcceptedRepoType('git', 'hg')
     @auth.CSRFRequired()
     def create(self, repo_name):
         repo = Repository.get_by_repo_name(repo_name)
         if not repo:
             raise HTTPNotFound
 
         try:
             _form = PullRequestForm(repo.repo_id)().to_python(request.POST)
         except formencode.Invalid as errors:
             if errors.error_dict.get('revisions'):
                 msg = 'Revisions: %s' % errors.error_dict['revisions']
             elif errors.error_dict.get('pullrequest_title'):
                 msg = _('Pull request requires a title with min. 3 chars')
             else:
                 msg = _('Error creating pull request: {}').format(errors)
             log.exception(msg)
             h.flash(msg, 'error')
 
             # would rather just go back to form ...
             return redirect(url('pullrequest_home', repo_name=repo_name))
 
         source_repo = _form['source_repo']
         source_ref = _form['source_ref']
         target_repo = _form['target_repo']
         target_ref = _form['target_ref']
         commit_ids = _form['revisions'][::-1]
         reviewers = _form['review_members']
 
         # find the ancestor for this pr
         source_db_repo = Repository.get_by_repo_name(_form['source_repo'])
         target_db_repo = Repository.get_by_repo_name(_form['target_repo'])
 
         source_scm = source_db_repo.scm_instance()
         target_scm = target_db_repo.scm_instance()
 
         source_commit = source_scm.get_commit(source_ref.split(':')[-1])
         target_commit = target_scm.get_commit(target_ref.split(':')[-1])
 
         ancestor = source_scm.get_common_ancestor(
             source_commit.raw_id, target_commit.raw_id, target_scm)
 
         target_ref_type, target_ref_name, __ = _form['target_ref'].split(':')
         target_ref = ':'.join((target_ref_type, target_ref_name, ancestor))
 
         pullrequest_title = _form['pullrequest_title']
         title_source_ref = source_ref.split(':', 2)[1]
         if not pullrequest_title:
             pullrequest_title = PullRequestModel().generate_pullrequest_title(
                 source=source_repo,
                 source_ref=title_source_ref,
                 target=target_repo
             )
 
         description = _form['pullrequest_desc']
         try:
             pull_request = PullRequestModel().create(
                 c.rhodecode_user.user_id, source_repo, source_ref, target_repo,
                 target_ref, commit_ids, reviewers, pullrequest_title,
                 description
             )
             Session().commit()
             h.flash(_('Successfully opened new pull request'),
                     category='success')
         except Exception as e:
             msg = _('Error occurred during sending pull request')
             log.exception(msg)
             h.flash(msg, category='error')
             return redirect(url('pullrequest_home', repo_name=repo_name))
 
         return redirect(url('pullrequest_show', repo_name=target_repo,
                             pull_request_id=pull_request.pull_request_id))
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @auth.CSRFRequired()
     @jsonify
     def update(self, repo_name, pull_request_id):
         pull_request_id = safe_int(pull_request_id)
         pull_request = PullRequest.get_or_404(pull_request_id)
         # only owner or admin can update it
         allowed_to_update = PullRequestModel().check_user_update(
             pull_request, c.rhodecode_user)
         if allowed_to_update:
             if 'reviewers_ids' in request.POST:
                 self._update_reviewers(pull_request_id)
             elif str2bool(request.POST.get('update_commits', 'false')):
                 self._update_commits(pull_request)
             elif str2bool(request.POST.get('close_pull_request', 'false')):
                 self._reject_close(pull_request)
             elif str2bool(request.POST.get('edit_pull_request', 'false')):
                 self._edit_pull_request(pull_request)
             else:
                 raise HTTPBadRequest()
             return True
         raise HTTPForbidden()
 
     def _edit_pull_request(self, pull_request):
         try:
             PullRequestModel().edit(
                 pull_request, request.POST.get('title'),
                 request.POST.get('description'))
         except ValueError:
             msg = _(u'Cannot update closed pull requests.')
             h.flash(msg, category='error')
             return
         else:
             Session().commit()
 
         msg = _(u'Pull request title & description updated.')
         h.flash(msg, category='success')
         return
 
     def _update_commits(self, pull_request):
         try:
             if PullRequestModel().has_valid_update_type(pull_request):
                 updated_version, changes = PullRequestModel().update_commits(
                     pull_request)
                 if updated_version:
                     msg = _(
                         u'Pull request updated to "{source_commit_id}" with '
                         u'{count_added} added, {count_removed} removed '
                         u'commits.'
                     ).format(
                         source_commit_id=pull_request.source_ref_parts.commit_id,
                         count_added=len(changes.added),
                         count_removed=len(changes.removed))
                     h.flash(msg, category='success')
+                    registry = get_current_registry()
+                    rhodecode_plugins = getattr(registry,
+                                                'rhodecode_plugins', {})
+                    channelstream_config = rhodecode_plugins.get(
+                        'channelstream', {})
+                    if channelstream_config.get('enabled'):
+                        message = msg + ' - <a onclick="' \
+                                        'window.location.reload()">' \
+                                        '<strong>{}</strong></a>'.format(
+                            _('Reload page')
+                        )
+                        channel = '/repo${}$/pr/{}'.format(
+                            pull_request.target_repo.repo_name,
+                            pull_request.pull_request_id
+                        )
+                        payload = {
+                            'type': 'message',
+                            'user': 'system',
+                            'exclude_users': [request.user.username],
+                            'channel': channel,
+                            'message': {
+                                'message': message,
+                                'level': 'success',
+                                'topic': '/notifications'
+                            }
+                        }
+                        channelstream_request(channelstream_config, [payload],
+                                              '/message', raise_exc=False)
                 else:
                     h.flash(_("Nothing changed in pull request."),
                             category='warning')
             else:
                 msg = _(
                     u"Skipping update of pull request due to reference "
                     u"type: {reference_type}"
                 ).format(reference_type=pull_request.source_ref_parts.type)
                 h.flash(msg, category='warning')
         except CommitDoesNotExistError:
             h.flash(
                 _(u'Update failed due to missing commits.'), category='error')
 
     @auth.CSRFRequired()
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     def merge(self, repo_name, pull_request_id):
         """
         POST /{repo_name}/pull-request/{pull_request_id}
 
         Merge will perform a server-side merge of the specified
         pull request, if the pull request is approved and mergeable.
         After succesfull merging, the pull request is automatically
         closed, with a relevant comment.
         """
         pull_request_id = safe_int(pull_request_id)
         pull_request = PullRequest.get_or_404(pull_request_id)
         user = c.rhodecode_user
 
         if self._meets_merge_pre_conditions(pull_request, user):
             log.debug("Pre-conditions checked, trying to merge.")
             extras = vcs_operation_context(
                 request.environ, repo_name=pull_request.target_repo.repo_name,
                 username=user.username, action='push',
                 scm=pull_request.target_repo.repo_type)
             self._merge_pull_request(pull_request, user, extras)
 
         return redirect(url(
             'pullrequest_show',
             repo_name=pull_request.target_repo.repo_name,
             pull_request_id=pull_request.pull_request_id))
 
     def _meets_merge_pre_conditions(self, pull_request, user):
         if not PullRequestModel().check_user_merge(pull_request, user):
             raise HTTPForbidden()
 
         merge_status, msg = PullRequestModel().merge_status(pull_request)
         if not merge_status:
             log.debug("Cannot merge, not mergeable.")
             h.flash(msg, category='error')
             return False
 
         if (pull_request.calculated_review_status()
             is not ChangesetStatus.STATUS_APPROVED):
             log.debug("Cannot merge, approval is pending.")
             msg = _('Pull request reviewer approval is pending.')
             h.flash(msg, category='error')
             return False
         return True
 
     def _merge_pull_request(self, pull_request, user, extras):
         merge_resp = PullRequestModel().merge(
             pull_request, user, extras=extras)
 
         if merge_resp.executed:
             log.debug("The merge was successful, closing the pull request.")
             PullRequestModel().close_pull_request(
                 pull_request.pull_request_id, user)
             Session().commit()
             msg = _('Pull request was successfully merged and closed.')
             h.flash(msg, category='success')
         else:
             log.debug(
                 "The merge was not successful. Merge response: %s",
                 merge_resp)
             msg = PullRequestModel().merge_status_message(
                 merge_resp.failure_reason)
             h.flash(msg, category='error')
 
     def _update_reviewers(self, pull_request_id):
         reviewers_ids = map(int, filter(
             lambda v: v not in [None, ''],
             request.POST.get('reviewers_ids', '').split(',')))
         PullRequestModel().update_reviewers(pull_request_id, reviewers_ids)
         Session().commit()
 
     def _reject_close(self, pull_request):
         if pull_request.is_closed():
             raise HTTPForbidden()
 
         PullRequestModel().close_pull_request_with_comment(
             pull_request, c.rhodecode_user, c.rhodecode_db_repo)
         Session().commit()
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @auth.CSRFRequired()
     @jsonify
     def delete(self, repo_name, pull_request_id):
         pull_request_id = safe_int(pull_request_id)
         pull_request = PullRequest.get_or_404(pull_request_id)
         # only owner can delete it !
         if pull_request.author.user_id == c.rhodecode_user.user_id:
             PullRequestModel().delete(pull_request)
             Session().commit()
             h.flash(_('Successfully deleted pull request'),
                     category='success')
             return redirect(url('my_account_pullrequests'))
         raise HTTPForbidden()
 
     @LoginRequired()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     def show(self, repo_name, pull_request_id):
         pull_request_id = safe_int(pull_request_id)
         c.pull_request = PullRequest.get_or_404(pull_request_id)
 
         c.template_context['pull_request_data']['pull_request_id'] = \
             pull_request_id
 
         # pull_requests repo_name we opened it against
         # ie. target_repo must match
         if repo_name != c.pull_request.target_repo.repo_name:
             raise HTTPNotFound
 
         c.allowed_to_change_status = PullRequestModel(). \
             check_user_change_status(c.pull_request, c.rhodecode_user)
         c.allowed_to_update = PullRequestModel().check_user_update(
             c.pull_request, c.rhodecode_user) and not c.pull_request.is_closed()
         c.allowed_to_merge = PullRequestModel().check_user_merge(
             c.pull_request, c.rhodecode_user) and not c.pull_request.is_closed()
 
         cc_model = ChangesetCommentsModel()
 
         c.pull_request_reviewers = c.pull_request.reviewers_statuses()
 
         c.pull_request_review_status = c.pull_request.calculated_review_status()
         c.pr_merge_status, c.pr_merge_msg = PullRequestModel().merge_status(
             c.pull_request)
         c.approval_msg = None
         if c.pull_request_review_status != ChangesetStatus.STATUS_APPROVED:
             c.approval_msg = _('Reviewer approval is pending.')
             c.pr_merge_status = False
         # load compare data into template context
         enable_comments = not c.pull_request.is_closed()
         self._load_compare_data(c.pull_request, enable_comments=enable_comments)
 
         # this is a hack to properly display links, when creating PR, the
         # compare view and others uses different notation, and
         # compare_commits.html renders links based on the target_repo.
         # We need to swap that here to generate it properly on the html side
         c.target_repo = c.source_repo
 
         # inline comments
         c.inline_cnt = 0
         c.inline_comments = cc_model.get_inline_comments(
             c.rhodecode_db_repo.repo_id,
             pull_request=pull_request_id).items()
         # count inline comments
         for __, lines in c.inline_comments:
             for comments in lines.values():
                 c.inline_cnt += len(comments)
 
         # outdated comments
         c.outdated_cnt = 0
         if ChangesetCommentsModel.use_outdated_comments(c.pull_request):
             c.outdated_comments = cc_model.get_outdated_comments(
                 c.rhodecode_db_repo.repo_id,
                 pull_request=c.pull_request)
             # Count outdated comments and check for deleted files
             for file_name, lines in c.outdated_comments.iteritems():
                 for comments in lines.values():
                     c.outdated_cnt += len(comments)
                 if file_name not in c.included_files:
                     c.deleted_files.append(file_name)
         else:
             c.outdated_comments = {}
 
         # comments
         c.comments = cc_model.get_comments(c.rhodecode_db_repo.repo_id,
                                            pull_request=pull_request_id)
 
         if c.allowed_to_update:
             force_close = ('forced_closed', _('Close Pull Request'))
             statuses = ChangesetStatus.STATUSES + [force_close]
         else:
             statuses = ChangesetStatus.STATUSES
         c.commit_statuses = statuses
 
         c.ancestor = None # TODO: add ancestor here
 
         return render('/pullrequests/pullrequest_show.html')
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @auth.CSRFRequired()
     @jsonify
     def comment(self, repo_name, pull_request_id):
         pull_request_id = safe_int(pull_request_id)
         pull_request = PullRequest.get_or_404(pull_request_id)
         if pull_request.is_closed():
             raise HTTPForbidden()
 
         # TODO: johbo: Re-think this bit, "approved_closed" does not exist
         # as a changeset status, still we want to send it in one value.
         status = request.POST.get('changeset_status', None)
         text = request.POST.get('text')
         if status and '_closed' in status:
             close_pr = True
             status = status.replace('_closed', '')
         else:
             close_pr = False
 
         forced = (status == 'forced')
         if forced:
             status = 'rejected'
 
         allowed_to_change_status = PullRequestModel().check_user_change_status(
             pull_request, c.rhodecode_user)
 
         if status and allowed_to_change_status:
             message = (_('Status change %(transition_icon)s %(status)s')
                        % {'transition_icon': '>',
                           'status': ChangesetStatus.get_status_lbl(status)})
             if close_pr:
                 message = _('Closing with') + ' ' + message
             text = text or message
         comm = ChangesetCommentsModel().create(
             text=text,
             repo=c.rhodecode_db_repo.repo_id,
             user=c.rhodecode_user.user_id,
             pull_request=pull_request_id,
             f_path=request.POST.get('f_path'),
             line_no=request.POST.get('line'),
             status_change=(ChangesetStatus.get_status_lbl(status)
                            if status and allowed_to_change_status else None),
             status_change_type=(status
                                 if status and allowed_to_change_status else None),
             closing_pr=close_pr
         )
 
 
 
         if allowed_to_change_status:
             old_calculated_status = pull_request.calculated_review_status()
             # get status if set !
             if status:
                 ChangesetStatusModel().set_status(
                     c.rhodecode_db_repo.repo_id,
                     status,
                     c.rhodecode_user.user_id,
                     comm,
                     pull_request=pull_request_id
                 )
 
             Session().flush()
             events.trigger(events.PullRequestCommentEvent(pull_request, comm))
             # we now calculate the status of pull request, and based on that
             # calculation we set the commits status
             calculated_status = pull_request.calculated_review_status()
             if old_calculated_status != calculated_status:
                 PullRequestModel()._trigger_pull_request_hook(
                     pull_request, c.rhodecode_user, 'review_status_change')
 
             calculated_status_lbl = ChangesetStatus.get_status_lbl(
                 calculated_status)
 
             if close_pr:
                 status_completed = (
                     calculated_status in [ChangesetStatus.STATUS_APPROVED,
                                           ChangesetStatus.STATUS_REJECTED])
                 if forced or status_completed:
                     PullRequestModel().close_pull_request(
                         pull_request_id, c.rhodecode_user)
                 else:
                     h.flash(_('Closing pull request on other statuses than '
                               'rejected or approved is forbidden. '
                               'Calculated status from all reviewers '
                               'is currently: %s') % calculated_status_lbl,
                             category='warning')
 
         Session().commit()
 
         if not request.is_xhr:
             return redirect(h.url('pullrequest_show', repo_name=repo_name,
                                   pull_request_id=pull_request_id))
 
         data = {
             'target_id': h.safeid(h.safe_unicode(request.POST.get('f_path'))),
         }
         if comm:
             c.co = comm
             data.update(comm.get_dict())
             data.update({'rendered_text':
                              render('changeset/changeset_comment_block.html')})
 
         return data
 
     @LoginRequired()
     @NotAnonymous()
     @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',
                                    'repository.admin')
     @auth.CSRFRequired()
     @jsonify
     def delete_comment(self, repo_name, comment_id):
         return self._delete_comment(comment_id)
 
     def _delete_comment(self, comment_id):
         comment_id = safe_int(comment_id)
         co = ChangesetComment.get_or_404(comment_id)
         if co.pull_request.is_closed():
             # don't allow deleting comments on closed pull request
             raise HTTPForbidden()
 
         is_owner = co.author.user_id == c.rhodecode_user.user_id
         is_repo_admin = h.HasRepoPermissionAny('repository.admin')(c.repo_name)
         if h.HasPermissionAny('hg.admin')() or is_repo_admin or is_owner:
             old_calculated_status = co.pull_request.calculated_review_status()
             ChangesetCommentsModel().delete(comment=co)
             Session().commit()
             calculated_status = co.pull_request.calculated_review_status()
             if old_calculated_status != calculated_status:
                 PullRequestModel()._trigger_pull_request_hook(
                     co.pull_request, c.rhodecode_user, 'review_status_change')
             return True
         else:
             raise HTTPForbidden()