Updated presence stanza with documentation and PEP8 style.

sleekxmpp/stanza/presence.py

@@ -6,26 +6,90 @@
     See the file LICENSE for copying permission.
 """
 
-from . error import Error
-from . rootstanza import RootStanza
-from .. xmlstream.stanzabase import StanzaBase, ET
+from sleekxmpp.stanza import Error
+from sleekxmpp.stanza.rootstanza import RootStanza
+from sleekxmpp.xmlstream.stanzabase import StanzaBase, ET
 
 
 class Presence(RootStanza):
-	interfaces = set(('type', 'to', 'from', 'id', 'show', 'status', 'priority'))
-	types = set(('available', 'unavailable', 'error', 'probe', 'subscribe', 'subscribed', 'unsubscribe', 'unsubscribed'))
-	showtypes = set(('dnd', 'chat', 'xa', 'away'))
-	sub_interfaces = set(('show', 'status', 'priority'))
-	name = 'presence'
-	plugin_attrib = name
+
+    """
+    XMPP's <presence> stanza allows entities to know the status of other
+    clients and components. Since it is currently the only multi-cast
+    stanza in XMPP, many extensions add more information to <presence>
+    stanzas to broadcast to every entry in the roster, such as
+    capabilities, music choices, or locations (XEP-0115: Entity Capabilities
+    and XEP-0163: Personal Eventing Protocol).
+
+    Since <presence> stanzas are broadcast when an XMPP entity changes
+    its status, the bulk of the traffic in an XMPP network will be from
+    <presence> stanzas. Therefore, do not include more information than
+    necessary in a status message or within a <presence> stanza in order
+    to help keep the network running smoothly.
+
+    Example <presence> stanzas:
+        <presence />
+
+        <presence from="user@example.com">
+          <show>away</show>
+          <status>Getting lunch.</status>
+          <priority>5</priority>
+        </presence>
+
+        <presence type="unavailable" />
+
+        <presence to="user@otherhost.com" type="subscribe" />
+
+    Stanza Interface:
+        priority -- A value used by servers to determine message routing.
+        show     -- The type of status, such as away or available for chat.
+        status   -- Custom, human readable status message.
+
+    Attributes:
+        types     -- One of: available, unavailable, error, probe,
+                         subscribe, subscribed, unsubscribe,
+                         and unsubscribed.
+        showtypes -- One of: away, chat, dnd, and xa.
+
+    Methods:
+        reply       -- Overrides StanzaBase.reply
+        setShow     -- Set the value of the <show> element.
+        getType     -- Get the value of the type attribute or <show> element.
+        setType     -- Set the value of the type attribute or <show> element.
+        getPriority -- Get the value of the <priority> element.
+        setPriority -- Set the value of the <priority> element.
+    """
+
     namespace = 'jabber:client'
+    name = 'presence'
+    interfaces = set(('type', 'to', 'from', 'id', 'show',
+                      'status', 'priority'))
+    sub_interfaces = set(('show', 'status', 'priority'))
+    plugin_attrib = name
+
+    types = set(('available', 'unavailable', 'error', 'probe', 'subscribe',
+                 'subscribed', 'unsubscribe', 'unsubscribed'))
+    showtypes = set(('dnd', 'chat', 'xa', 'away'))
 
     def setShow(self, show):
+        """
+        Set the value of the <show> element.
+
+        Arguments:
+            show -- Must be one of: away, chat, dnd, or xa.
+        """
         if show in self.showtypes:
             self._setSubText('show', text=show)
         return self
 
     def setType(self, value):
+        """
+        Set the type attribute's value, and the <show> element
+        if applicable.
+
+        Arguments:
+            value -- Must be in either self.types or self.showtypes.
+        """
         if value in self.types:
             self['show'] = None
             if value == 'available':
@@ -36,14 +100,32 @@ class Presence(RootStanza):
         return self
 
     def setPriority(self, value):
-		self._setSubText('priority', text = str(value))
+        """
+        Set the entity's priority value. Some server use priority to
+        determine message routing behavior.
+
+        Bot clients should typically use a priority of 0 if the same
+        JID is used elsewhere by a human-interacting client.
+
+        Arguments:
+            value -- An integer value greater than or equal to 0.
+        """
+        self._setSubText('priority', text=str(value))
 
     def getPriority(self):
+        """
+        Return the value of the <presence> element as an integer.
+        """
         p = self._getSubText('priority')
-		if not p: p = 0
+        if not p:
+            p = 0
         return int(p)
 
     def getType(self):
+        """
+        Return the value of the <presence> stanza's type attribute, or
+        the value of the <show> element.
+        """
         out = self._getAttr('type')
         if not out:
             out = self['show']
@@ -52,6 +134,11 @@ class Presence(RootStanza):
         return out
 
     def reply(self):
+        """
+        Set the appropriate presence reply type.
+
+        Overrides StanzaBase.reply.
+        """
         if self['type'] == 'unsubscribe':
             self['type'] = 'unsubscribed'
         elif self['type'] == 'subscribe':

tests/test_presencestanzas.py

@@ -2,52 +2,56 @@ import sleekxmpp
 from sleektest import *
 from sleekxmpp.stanza.presence import Presence
 
+
 class TestPresenceStanzas(SleekTest):
 
     def testPresenceShowRegression(self):
         """Regression check presence['type'] = 'dnd' show value working"""
         p = self.Presence()
         p['type'] = 'dnd'
-		self.checkPresence(p, """
-                  <presence><show>dnd</show></presence>
-                """)
+        self.checkPresence(p, "<presence><show>dnd</show></presence>")
 
     def testPresenceType(self):
         """Test manipulating presence['type']"""
         p = self.Presence()
         p['type'] = 'available'
-		self.checkPresence(p, """
-                  <presence />
-                """)
-		self.failUnless(p['type'] == 'available', "Incorrect presence['type'] for type 'available'")
+        self.checkPresence(p, "<presence />")
+        self.failUnless(p['type'] == 'available',
+                "Incorrect presence['type'] for type 'available'")
 
         for showtype in ['away', 'chat', 'dnd', 'xa']:
             p['type'] = showtype
             self.checkPresence(p, """
               <presence><show>%s</show></presence>
             """ % showtype)
-			self.failUnless(p['type'] == showtype, "Incorrect presence['type'] for type '%s'" % showtype)
+            self.failUnless(p['type'] == showtype,
+                "Incorrect presence['type'] for type '%s'" % showtype)
 
         p['type'] = None
-		self.checkPresence(p, """
-                  <presence />
-                """)
+        self.checkPresence(p, "<presence />")
 
     def testPresenceUnsolicitedOffline(self):
-		"""Unsolicted offline presence does not spawn changed_status or update roster"""
+        """
+        Unsolicted offline presence does not spawn changed_status
+        or update the roster.
+        """
         p = self.Presence()
         p['type'] = 'unavailable'
         p['from'] = 'bill@chadmore.com/gmail15af'
 
         c = sleekxmpp.ClientXMPP('crap@wherever', 'password')
         happened = []
+
         def handlechangedpresence(event):
             happened.append(True)
+
         c.add_event_handler("changed_status", handlechangedpresence)
         c._handlePresence(p)
 
-		self.failUnless(happened == [], "changed_status event triggered for superfulous unavailable presence")
-		self.failUnless(c.roster == {}, "Roster updated for superfulous unavailable presence")
+        self.failUnless(happened == [],
+            "changed_status event triggered for extra unavailable presence")
+        self.failUnless(c.roster == {},
+            "Roster updated for superfulous unavailable presence")
 
 
 suite = unittest.TestLoader().loadTestsFromTestCase(TestPresenceStanzas)