--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/pyams_content/features/glossary/__init__.py	Fri Dec 28 10:19:45 2018 +0100
@@ -0,0 +1,57 @@
+#
+# Copyright (c) 2008-2018 Thierry Florac <tflorac AT ulthar.net>
+# All Rights Reserved.
+#
+# This software is subject to the provisions of the Zope Public License,
+# Version 2.1 (ZPL).  A copy of the ZPL should accompany this distribution.
+# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
+# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
+# FOR A PARTICULAR PURPOSE.
+#
+
+__docformat__ = 'restructuredtext'
+
+import logging
+import pickle
+from ahocorasick import Automaton
+
+from pyams_cache.beaker import get_cache
+from pyams_content.component.theme import ITagsManager
+from pyams_thesaurus.interfaces.thesaurus import IThesaurus
+from pyams_utils.registry import query_utility
+
+
+logger = logging.getLogger("PyAMS (content)")
+
+GLOSSARY_CACHE_REGION = 'persistent'
+GLOSSARY_CACHE_NAME = 'PyAMS::glossary'
+GLOSSARY_CACHE_KEY = 'automaton'
+
+
+def get_glossary_automaton(root):
+    """Generate and store glossary automaton"""
+    # generate Automaton
+    tags_manager = ITagsManager(root)
+    if not tags_manager.enable_glossary:
+        return
+    thesaurus = query_utility(IThesaurus, name=tags_manager.glossary_thesaurus_name)
+    if thesaurus is None:
+        return
+    logger.debug("Building glossary automaton...")
+    automaton = Automaton()
+    for term in thesaurus.terms.values():
+        if term.status == 'published':
+            automaton.add_word(term.label, term.label)
+    automaton.make_automaton()
+    logger.debug("Automaton built with {} terms".format(len(automaton)))
+    # store automaton items
+    glossary_cache = get_cache(GLOSSARY_CACHE_REGION, GLOSSARY_CACHE_NAME)
+    glossary_cache.set_value(GLOSSARY_CACHE_KEY, pickle.dumps(automaton))
+    return automaton
+
+
+def reset_glossary_automaton():
+    """Re-initialize glossary automaton"""
+    glossary_cache = get_cache(GLOSSARY_CACHE_REGION, GLOSSARY_CACHE_NAME)
+    glossary_cache.clear()