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diff --git a/bin/python/isc/keyevent.py.in b/bin/python/isc/keyevent.py.in
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+############################################################################
+# Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+# See the COPYRIGHT file distributed with this work for additional
+# information regarding copyright ownership.
+############################################################################
+
+import time
+
+
+########################################################################
+# Class keyevent
+########################################################################
+class keyevent:
+    """ A discrete key event, e.g., Publish, Activate, Inactive, Delete,
+    etc. Stores the date of the event, and identifying information
+    about the key to which the event will occur."""
+
+    def __init__(self, what, key, when=None):
+        self.what = what
+        self.when = when or key.gettime(what)
+        self.key = key
+        self.sep = key.sep
+        self.zone = key.name
+        self.alg = key.alg
+        self.keyid = key.keyid
+
+    def __repr__(self):
+        return repr((self.when, self.what, self.keyid, self.sep,
+                     self.zone, self.alg))
+
+    def showtime(self):
+        return time.strftime("%a %b %d %H:%M:%S UTC %Y", self.when)
+
+    # update sets of active and published keys, based on
+    # the contents of this keyevent
+    def status(self, active, published, output = None):
+        def noop(*args, **kwargs): pass
+        if not output:
+            output = noop
+
+        if not active:
+            active = set()
+        if not published:
+            published = set()
+
+        if self.what == "Activate":
+            active.add(self.keyid)
+        elif self.what == "Publish":
+            published.add(self.keyid)
+        elif self.what == "Inactive":
+            if self.keyid not in active:
+                output("\tWARNING: %s scheduled to become inactive "
+                       "before it is active"
+                       % repr(self.key))
+            else:
+                active.remove(self.keyid)
+        elif self.what == "Delete":
+            if self.keyid in published:
+                published.remove(self.keyid)
+            else:
+                output("WARNING: key %s is scheduled for deletion "
+                       "before it is published" % repr(self.key))
+        elif self.what == "Revoke":
+            # We don't need to worry about the logic of this one;
+            # just stop counting this key as either active or published
+            if self.keyid in published:
+                published.remove(self.keyid)
+            if self.keyid in active:
+                active.remove(self.keyid)
+
+        return active, published