'repository.admin')

    @jsonify

    def delete(self, repo_name, pull_request_id):

        pull_request = PullRequest.get_or_404(pull_request_id)

        #only owner can delete it !

        if pull_request.owner.user_id == c.authuser.user_id:

            PullRequestModel().delete(pull_request)

            Session().commit()

            h.flash(_('Successfully deleted pull request'),

                    category='success')

            return redirect(url('my_pullrequests'))

        raise HTTPForbidden()

    @LoginRequired()

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

                                   'repository.admin')

    def show(self, repo_name, pull_request_id, extra=None):

        repo_model = RepoModel()

        c.users_array = repo_model.get_users_js()

        c.user_groups_array = repo_model.get_user_groups_js()

        c.pull_request = PullRequest.get_or_404(pull_request_id)

        c.allowed_to_change_status = self._get_is_allowed_change_status(c.pull_request)

        cc_model = ChangesetCommentsModel()

        cs_model = ChangesetStatusModel()

        # pull_requests repo_name we opened it against

        # ie. other_repo must match

        if repo_name != c.pull_request.other_repo.repo_name:

            raise HTTPNotFound

        # load compare data into template context

        c.cs_repo = c.pull_request.org_repo

        (c.cs_ref_type,

         c.cs_ref_name,

         c.cs_rev) = c.pull_request.org_ref.split(':')

        c.a_repo = c.pull_request.other_repo

        (c.a_ref_type,

         c.a_ref_name,

         c.a_rev) = c.pull_request.other_ref.split(':') # other_rev is ancestor

        org_scm_instance = c.cs_repo.scm_instance # property with expensive cache invalidation check!!!

        c.cs_repo = c.cs_repo

        c.cs_ranges = [org_scm_instance.get_changeset(x) for x in c.pull_request.revisions]

        c.cs_ranges_org = None # not stored and not important and moving target - could be calculated ...

        revs = [ctx.revision for ctx in reversed(c.cs_ranges)]

        c.jsdata = json.dumps(graph_data(org_scm_instance, revs))

        avail_revs = set()

        avail_show = []

        c.cs_branch_name = c.cs_ref_name

        other_scm_instance = c.a_repo.scm_instance

        c.update_msg = ""

        c.update_msg_other = ""

        if org_scm_instance.alias == 'hg' and c.a_ref_name != 'ancestor':

            if c.cs_ref_type != 'branch':

                c.cs_branch_name = org_scm_instance.get_changeset(c.cs_ref_name).branch # use ref_type ?

            c.a_branch_name = c.a_ref_name

            if c.a_ref_type != 'branch':

                try:

                    c.a_branch_name = other_scm_instance.get_changeset(c.a_ref_name).branch # use ref_type ?

                except EmptyRepositoryError:

                    c.a_branch_name = 'null' # not a branch name ... but close enough

            # candidates: descendants of old head that are on the right branch

            #             and not are the old head itself ...

            #             and nothing at all if old head is a descendant of target ref name

            if other_scm_instance._repo.revs('present(%s)::&%s', c.cs_ranges[-1].raw_id, c.a_branch_name):

                c.update_msg = _('This pull request has already been merged to %s.') % c.a_branch_name

            elif c.pull_request.is_closed():

                c.update_msg = _('This pull request has been closed and can not be updated.')

            else: # look for descendants of PR head on source branch in org repo

                avail_revs = org_scm_instance._repo.revs('%s:: & branch(%s)',

                                                         revs[0], c.cs_branch_name)

                if len(avail_revs) > 1: # more than just revs[0]

                    # also show changesets that not are descendants but would be merged in

                    targethead = other_scm_instance.get_changeset(c.a_branch_name).raw_id

                    if org_scm_instance.path != other_scm_instance.path:

                        # Note: org_scm_instance.path must come first so all

                        # valid revision numbers are 100% org_scm compatible

                        # - both for avail_revs and for revset results

                        hgrepo = unionrepo.unionrepository(org_scm_instance.baseui,

                                                           org_scm_instance.path,

                                                           other_scm_instance.path)

                    else:

                        hgrepo = org_scm_instance._repo

                    show = set(hgrepo.revs('::%ld & !::%s & !::%s',

                                           avail_revs, revs[0], targethead))

                    c.update_msg = _('This pull request can be updated with changes on %s:') % c.cs_branch_name

                else:

                    show = set()

                    c.update_msg = _('No changesets found for updating this pull request.')

                # TODO: handle branch heads that not are tip-most

                brevs = org_scm_instance._repo.revs('%s - %ld', c.cs_branch_name, avail_revs)

                if brevs:

                    # also show changesets that are on branch but neither ancestors nor descendants

          </div>

          <div class="input">

            <div class="changeset-status-container" style="float:none;clear:both">

            %if c.current_voting_result:

              <span class="changeset-status-ico" style="padding:0px 4px 0px 0px">

                  <i class="icon-circle changeset-status-${c.current_voting_result}" title="${_('Pull request status calculated from votes')}"></i></span>

              <span class="changeset-status-lbl tooltip" title="${_('Pull request status calculated from votes')}">

                %if c.pull_request.is_closed():

                    ${_('Closed')},

                %endif

                ${h.changeset_status_lbl(c.current_voting_result)}

              </span>

            %endif

            </div>

          </div>

        </div>

        <div class="field">

          <div class="label-summary">

              <label>${_('Still not reviewed by')}:</label>

          </div>

          <div class="input">

            % if len(c.pull_request_pending_reviewers) > 0:

                <div class="tooltip" title="${', '.join([x.username for x in c.pull_request_pending_reviewers])}">${ungettext('%d reviewer', '%d reviewers',len(c.pull_request_pending_reviewers)) % len(c.pull_request_pending_reviewers)}</div>

            % elif len(c.pull_request_reviewers) > 0:

                <div>${_('Pull request was reviewed by all reviewers')}</div>

            %else:

                <div>${_('There are no reviewers')}</div>

            %endif

          </div>

        </div>

        <div class="field">

          <div class="label-summary">

              <label>${_('Origin')}:</label>

          </div>

          <div class="input">

            <div>

              ${h.link_to_ref(c.pull_request.org_repo.repo_name, c.cs_ref_type, c.cs_ref_name, c.cs_rev)}

              %if c.cs_ref_type != 'branch':

                ${_('on')} ${h.link_to_ref(c.pull_request.org_repo.repo_name, 'branch', c.cs_branch_name)}

              %endif

            </div>

          </div>

        </div>

        <div class="field">

          <div class="label-summary">

              <label>${_('Target')}:</label>

          </div>

          <div class="input">

              ${h.link_to_ref(c.pull_request.other_repo.repo_name, c.a_ref_type, c.a_ref_name)}

              ## we don't know other rev - c.a_rev is ancestor and not necessarily on other_name_branch branch

          </div>

        </div>

        <div class="field">

          <div class="label-summary">

              <label>${_('Pull changes')}:</label>

          </div>

          <div class="input">

              <div>

               ## TODO: use cs_ranges[-1] or org_ref_parts[1] in both cases?

               %if h.is_hg(c.pull_request.org_repo):

                 <span style="font-family: monospace">hg pull ${c.pull_request.org_repo.clone_url()} -r ${h.short_id(c.cs_ranges[-1].raw_id)}</span>

               %elif h.is_git(c.pull_request.org_repo):

                 <span style="font-family: monospace">git pull ${c.pull_request.org_repo.clone_url()} ${c.pull_request.org_ref_parts[1]}</span>

               %endif

              </div>

          </div>

        </div>

        <div class="field">

          <div class="label-summary">

              <label>${_('Created on')}:</label>

          </div>

          <div class="input">

              <div>${h.fmt_date(c.pull_request.created_on)}</div>

          </div>

        </div>

        <div class="field">

          <div class="label-summary">

              <label>${_('Owner')}:</label>

          </div>

          <div class="input pr-not-edit">

                  <div class="gravatar">

                    ${h.gravatar(c.pull_request.owner.email, size=20)}

                  </div>

                  <span>${c.pull_request.owner.full_name_and_username}</span><br/>

                  <span><a href="mailto:${c.pull_request.owner.email}">${c.pull_request.owner.email}</a></span><br/>

          </div>

          <div class="input pr-do-edit ac" style="display:none">

               ${h.text('owner', class_="large", value=c.pull_request.owner.username, placeholder=_('Username'))}

               <div id="owner_completion_container"></div>

          </div>

        </div>

        <div class="field">

            <div class="label-summary">

              <label>${_('Update')}:</label>

            </div>

            <div class="input">

              <div class="msg-div">${c.update_msg}</div>