plugins/disco: Add support for querying with a custom node, and disco#items.

This can be useful in some cases.

plugins/disco.py

@@ -16,6 +16,7 @@ Usage
 """
 
 from poezio.plugin import BasePlugin
+from poezio.decorators import command_args_parser
 from slixmpp.jid import InvalidJID
 
 
@@ -24,11 +25,11 @@ class Plugin(BasePlugin):
         self.api.add_command(
             'disco',
             self.command_disco,
-            usage='<JID>',
+            usage='<JID> [node] [info|items]',
             short='Get the disco#info of a JID',
             help='Get the disco#info of a JID')
 
-    def on_disco(self, iq):
+    def on_info(self, iq):
         if iq['type'] == 'error':
             self.api.information(iq['error']['text'] or iq['error']['condition'], 'Error')
             return
@@ -53,9 +54,44 @@ class Plugin(BasePlugin):
         if server_info:
             self.api.information('\n'.join(server_info), title)
 
-    def command_disco(self, jid):
+    def on_items(self, iq):
+        if iq['type'] == 'error':
+            self.api.information(iq['error']['text'] or iq['error']['condition'], 'Error')
+            return
+
+        def describe(item):
+            text = item[0]
+            node = item[1]
+            name = item[2]
+            if node is not None:
+                text += ', node=' + node
+            if name is not None:
+                text += ', name=' + name
+            return text
+
+        items = iq['disco_items']
+        self.api.information('\n'.join(describe(item) for item in items['items']), 'Items')
+
+    @command_args_parser.quoted(1, 3)
+    def command_disco(self, args):
+        if args is None:
+            self.core.command.help('disco')
+            return
+        if len(args) == 1:
+            jid, = args
+            node = None
+            type_ = 'info'
+        elif len(args) == 2:
+            jid, node = args
+            type_ = 'info'
+        else:
+            jid, node, type_ = args
         try:
+            if type_ == 'info':
                 self.core.xmpp.plugin['xep_0030'].get_info(
-                jid=jid, cached=False, callback=self.on_disco)
+                    jid=jid, node=node, cached=False, callback=self.on_info)
+            elif type_ == 'items':
+                self.core.xmpp.plugin['xep_0030'].get_items(
+                    jid=jid, node=node, cached=False, callback=self.on_items)
         except InvalidJID as e:
             self.api.information('Invalid JID “%s”: %s' % (jid, e), 'Error')