1 files changed, 60 insertions, 0 deletions
diff --git a/app/discover/events/event_delete_base.py b/app/discover/events/event_delete_base.py
new file mode 100644
index 0000000..1cf94c3
--- /dev/null
+++ b/app/discover/events/event_delete_base.py
@@ -0,0 +1,60 @@
+###############################################################################
+# Copyright (c) 2017 Koren Lev (Cisco Systems), Yaron Yogev (Cisco Systems)   #
+# and others                                                                  #
+#                                                                             #
+# All rights reserved. This program and the accompanying materials            #
+# are made available under the terms of the Apache License, Version 2.0       #
+# which accompanies this distribution, and is available at                    #
+# http://www.apache.org/licenses/LICENSE-2.0                                  #
+###############################################################################
+import re
+
+from bson.objectid import ObjectId
+
+from discover.clique_finder import CliqueFinder
+from discover.events.event_base import EventBase, EventResult
+
+
+class EventDeleteBase(EventBase):
+
+    def delete_handler(self, env, object_id, object_type) -> EventResult:
+        item = self.inv.get_by_id(env, object_id)
+        if not item:
+            self.log.info('{0} document is not found, aborting {0} delete'.format(object_type))
+            return EventResult(result=False, retry=False)
+
+        db_id = ObjectId(item['_id'])
+        id_path = item['id_path'] + '/'
+
+        # remove related clique
+        clique_finder = CliqueFinder()
+        self.inv.delete('cliques', {'focal_point': db_id})
+
+        # keep related links to do rebuild of cliques using them
+        matched_links_source = clique_finder.find_links_by_source(db_id)
+        matched_links_target = clique_finder.find_links_by_target(db_id)
+
+        links_using_object = []
+        links_using_object.extend([l['_id'] for l in matched_links_source])
+        links_using_object.extend([l['_id'] for l in matched_links_target])
+
+        # find cliques using these links
+        if links_using_object:
+            matched_cliques = clique_finder.find_cliques_by_link(links_using_object)
+            # find cliques using these links and rebuild them
+            for clique in matched_cliques:
+                clique_finder.rebuild_clique(clique)
+
+        # remove all related links
+        self.inv.delete('links', {'source': db_id})
+        self.inv.delete('links', {'target': db_id})
+
+        # remove object itself
+        self.inv.delete('inventory', {'_id': db_id})
+
+        # remove children
+        regexp = re.compile('^' + id_path)
+        self.inv.delete('inventory', {'id_path': {'$regex': regexp}})
+        return EventResult(result=True,
+                           related_object=object_id,
+                           display_context=object_id)