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"""
Do a disco#info query on a JID

Usage
-----

.. glossary::

    /disco
        **Usage:** ``/disco <JID>``

        This command queries a JID for its disco#info.

        There is no cache, as this is generally used for debug more than
        anything user-related.
"""

from poezio.plugin import BasePlugin
from slixmpp.jid import InvalidJID

class Plugin(BasePlugin):
    def init(self):
        self.api.add_command('disco', self.command_disco,
                usage='<JID>',
                short='Get the disco#info of a JID',
                help='Get the disco#info of a JID')

    def on_disco(self, iq):
        info = iq['disco_info']
        identities = (str(identity) for identity in info['identities'])
        self.api.information('\n'.join(identities), 'Identities')
        features = sorted(str(feature) for feature in info['features'])
        self.api.information('\n'.join(features), 'Features')
        for field in info['form']['fields']:
            if field['type'] == 'hidden' and field['var'] == 'FORM_TYPE':
                value = field['value']
                if 'http://jabber.org/network/serverinfo' not in value:
                    self.api.error('Unknown form type “%s”' % value, 'Form')
                    return
                break
        server_info = []
        for field in info['form']:
            var = field['var']
            if field['type'] == 'hidden' and var == 'FORM_TYPE':
                continue
            sep = '\n  ' + len(var) * ' '
            value = sep.join(field.get_value(convert=False))
            server_info.append('%s: %s' % (var, value))
        if server_info:
            self.api.information('\n'.join(server_info), 'Server Info')

    def command_disco(self, jid):
        try:
            self.core.xmpp.plugin['xep_0030'].get_info(jid=jid, cached=False,
                                                       callback=self.on_disco)
        except InvalidJID as e:
            self.api.information('Invalid JID “%s”: %s' % (jid, e), 'Error')