--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sat/plugins/plugin_misc_watched.py	Mon Apr 02 19:44:50 2018 +0200
@@ -0,0 +1,81 @@
+#!/usr/bin/env python2
+# -*- coding: utf-8 -*-
+
+# SàT plugin to be notified on some entities presence
+# Copyright (C) 2009-2018 Jérôme Poisson (goffi@goffi.org)
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from sat.core.i18n import _, D_
+from sat.core.constants import Const as C
+from sat.core.log import getLogger
+log = getLogger(__name__)
+from sat.core import exceptions
+from sat.tools import xml_tools
+
+
+PLUGIN_INFO = {
+    C.PI_NAME: "Watched",
+    C.PI_IMPORT_NAME: "WATCHED",
+    C.PI_TYPE: "Misc",
+    C.PI_PROTOCOLS: [],
+    C.PI_DEPENDENCIES: [],
+    C.PI_MAIN: "Watched",
+    C.PI_HANDLER: "no",
+    C.PI_DESCRIPTION: _("""Watch for entities presence, and send notification accordingly""")
+}
+
+
+CATEGORY = D_("Misc")
+NAME = "Watched"
+NOTIF = D_("Watched entity {entity} is connected")
+
+
+class Watched(object):
+    params = """
+    <params>
+    <individual>
+    <category name="{category_name}" label="{category_label}">
+        <param name="{name}" label="{label}" type="jids_list" security="0" />
+    </category>
+    </individual>
+    </params>
+    """.format(category_name=CATEGORY,
+               category_label=_(CATEGORY),
+               name=NAME,
+               label=_(NAME),
+              )
+
+    def __init__(self, host):
+        log.info(_("Watched initialisation"))
+        self.host = host
+        host.memory.updateParams(self.params)
+        host.trigger.add("presenceReceived", self._presenceReceivedTrigger)
+
+    def _presenceReceivedTrigger(self, entity, show, priority, statuses, profile):
+        if show == C.PRESENCE_UNAVAILABLE:
+            return True
+
+        # we check that the previous presence was unavailable (no notification else)
+        try:
+            old_show = self.host.memory.getEntityDatum(entity, "presence", profile).show
+        except (KeyError, exceptions.UnknownEntityError):
+            old_show = C.PRESENCE_UNAVAILABLE
+
+        if old_show == C.PRESENCE_UNAVAILABLE:
+            watched = self.host.memory.getParamA(NAME, CATEGORY, profile_key=profile)
+            if entity in watched or entity.userhostJID() in watched:
+                self.host.actionNew({'xmlui': xml_tools.note(_(NOTIF).format(entity=entity.full())).toXml()}, profile=profile)
+
+        return True