From 69ddeceb491b0791d3b6ff4a5bb135c79cf490a0 Mon Sep 17 00:00:00 2001
From: Lance Stout <lancestout@gmail.com>
Date: Fri, 22 Jun 2012 21:13:30 -0700
Subject: Add support for XEP-0256: Last Activity in Presence

---
 setup.py                                    |  1 +
 sleekxmpp/plugins/__init__.py               |  1 +
 sleekxmpp/plugins/xep_0256/__init__.py      | 14 +++++++
 sleekxmpp/plugins/xep_0256/last_activity.py | 64 +++++++++++++++++++++++++++++
 4 files changed, 80 insertions(+)
 create mode 100644 sleekxmpp/plugins/xep_0256/__init__.py
 create mode 100644 sleekxmpp/plugins/xep_0256/last_activity.py

diff --git a/setup.py b/setup.py
index 71973ceb..4c22611f 100755
--- a/setup.py
+++ b/setup.py
@@ -93,6 +93,7 @@ packages     = [ 'sleekxmpp',
                  'sleekxmpp/plugins/xep_0224',
                  'sleekxmpp/plugins/xep_0231',
                  'sleekxmpp/plugins/xep_0249',
+                 'sleekxmpp/plugins/xep_0256',
                  'sleekxmpp/plugins/xep_0258',
                  'sleekxmpp/features',
                  'sleekxmpp/features/feature_mechanisms',
diff --git a/sleekxmpp/plugins/__init__.py b/sleekxmpp/plugins/__init__.py
index cc41280c..8464f0cb 100644
--- a/sleekxmpp/plugins/__init__.py
+++ b/sleekxmpp/plugins/__init__.py
@@ -56,5 +56,6 @@ __all__ = [
     'xep_0224',  # Attention
     'xep_0231',  # Bits of Binary
     'xep_0249',  # Direct MUC Invitations
+    'xep_0256',  # Last Activity in Presence
     'xep_0258',  # Security Labels in XMPP
 ]
diff --git a/sleekxmpp/plugins/xep_0256/__init__.py b/sleekxmpp/plugins/xep_0256/__init__.py
new file mode 100644
index 00000000..cfe712b7
--- /dev/null
+++ b/sleekxmpp/plugins/xep_0256/__init__.py
@@ -0,0 +1,14 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2012 Nathanael C. Fritz, Lance J.T. Stout
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+from sleekxmpp.plugins.base import register_plugin
+
+from sleekxmpp.plugins.xep_0256.last_activity import XEP_0256
+
+
+register_plugin(XEP_0256)
diff --git a/sleekxmpp/plugins/xep_0256/last_activity.py b/sleekxmpp/plugins/xep_0256/last_activity.py
new file mode 100644
index 00000000..2938868d
--- /dev/null
+++ b/sleekxmpp/plugins/xep_0256/last_activity.py
@@ -0,0 +1,64 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2012 Nathanael C. Fritz, Lance J.T. Stout
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permission.
+"""
+
+import logging
+
+from sleekxmpp import Presence
+from sleekxmpp.plugins import BasePlugin
+from sleekxmpp.xmlstream import register_stanza_plugin
+
+from sleekxmpp.plugins.xep_0012 import stanza, LastActivity
+
+
+log = logging.getLogger(__name__)
+
+
+class XEP_0256(BasePlugin):
+
+    name = 'xep_0256'
+    description = 'XEP-0256: Last Activity in Presence'
+    dependencies = set(['xep_0012'])
+    stanza = stanza
+
+    def plugin_init(self):
+        self.auto_last_activity = self.config.get('auto_last_activity', False)
+
+        register_stanza_plugin(Presence, LastActivity)
+
+        self.xmpp.add_filter('out', self._initial_presence_activity)
+        self.xmpp.add_event_handler('connected', self._reset_presence_activity)
+
+        self._initial_presence = set()
+
+    def _reset_presence_activity(self, e):
+        self._initial_presence = set()
+
+    def _initial_presence_activity(self, stanza):
+        if isinstance(stanza, Presence):
+            use_last_activity = False
+
+            if self.auto_last_activity and  stanza['show'] in ('xa', 'away'):
+                use_last_activity = True
+
+            if stanza['from'] not in self._initial_presence:
+                self._initial_presence.add(stanza['from'])
+                use_last_activity = True
+
+            if use_last_activity:
+                plugin = self.xmpp['xep_0012']
+                try:
+                    result = plugin.api['get_last_activity'](stanza['from'],
+                                                             None,
+                                                             stanza['to'])
+                    seconds = result['last_activity']['seconds']
+                except XMPPError:
+                    seconds = None
+
+                if seconds is not None:
+                    stanza['last_activity']['seconds'] = seconds
+        return stanza
-- 
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