"""management and error screens

:organization: Logilab

:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.

:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr

:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses

"""

__docformat__ = "restructuredtext en"

from time import strftime, localtime

from logilab.mtconverter import xml_escape

from cubicweb.selectors import none_rset, match_user_groups

from cubicweb.view import StartupView

def dict_to_html(w, dict):

    # XHTML doesn't allow emtpy <ul> nodes

    if dict:

        w(u'<ul>')

        for key in sorted(dict):

            w(u'<li><span class="label">%s</span>: <span>%s</span></li>' % (

                xml_escape(str(key)), xml_escape(repr(dict[key]))))

        w(u'</ul>')

class DebugView(StartupView):

    id = 'debug'

    __select__ = none_rset() & match_user_groups('managers')

    title = _('server debug information')

    def call(self, **kwargs):

        """display server information"""

        w = self.w

        w(u'<h1>server sessions</h1>')

        sessions = self.req.cnx._repo._sessions.items()

        if sessions:

            w(u'<ul>')

            for sid, session in sessions:

                w(u'<li>%s  (last usage: %s)<br/>' % (xml_escape(str(session)),

                                                      strftime('%Y-%m-%d %H:%M:%S',

                                                               localtime(session.timestamp))))

                dict_to_html(w, session.data)

                w(u'</li>')

            w(u'</ul>')

        else:

            w(u'<p>no server sessions found</p>')

        from cubicweb.web.application import SESSION_MANAGER

        w(u'<h1>web sessions</h1>')

        sessions = SESSION_MANAGER.current_sessions()

        if sessions:

            w(u'<ul>')

            for session in sessions:

                w(u'<li>%s (last usage: %s)<br/>' % (session.sessionid,

                                                     strftime('%Y-%m-%d %H:%M:%S',

                                                              localtime(session.last_usage_time))))

                dict_to_html(w, session.data)

                w(u'</li>')

            w(u'</ul>')

        else:

            w(u'<p>no web sessions found</p>')