Implement logs model using Elasticsearch

- Implement logs model using Elasticsearch with tests
- Implement transition model using both elasticsearch and database model
- Add LOGS_MODEL configuration to choose which to use.

Co-authored-by: Sida Chen <sidchen@redhat.com>
Co-authored-by: Kenny Lee Sin Cheong <kenny.lee@redhat.com>

data/logs_model/shared.py

@@ -0,0 +1,40 @@
+import uuid
+import json
+
+from data import model
+from data.logs_model.datatypes import _format_date
+
+
+class SharedModel:
+  def queue_logs_export(self, start_datetime, end_datetime, export_action_logs_queue,
+                        namespace_name=None, repository_name=None, callback_url=None,
+                        callback_email=None, filter_kinds=None):
+    """ Queues logs between the start_datetime and end_time, filtered by a repository or namespace,
+        for export to the specified URL and/or email address. Returns the ID of the export job
+        queued or None if error.
+    """
+    export_id = str(uuid.uuid4())
+    namespace = model.user.get_namespace_user(namespace_name)
+    if namespace is None:
+      return None
+
+    repository = None
+    if repository_name is not None:
+      repository = model.repository.get_repository(namespace_name, repository_name)
+      if repository is None:
+        return None
+
+    export_action_logs_queue.put([namespace_name],
+                                 json.dumps({
+                                   'export_id': export_id,
+                                   'repository_id': repository.id if repository else None,
+                                   'namespace_id': namespace.id,
+                                   'namespace_name': namespace.username,
+                                   'repository_name': repository.name if repository else None,
+                                   'start_time': _format_date(start_datetime),
+                                   'end_time': _format_date(end_datetime),
+                                   'callback_url': callback_url,
+                                   'callback_email': callback_email,
+                                 }), retries_remaining=3)
+
+    return export_id