Add manifest creation to new registry data model interface

data/registry_model/label_handlers.py

@@ -0,0 +1,28 @@
+import logging
+
+from util.timedeltastring import convert_to_timedelta
+
+logger = logging.getLogger(__name__)
+
+def _expires_after(label_dict, manifest, model):
+  """ Sets the expiration of a manifest based on the quay.expires-in label. """
+  try:
+    timedelta = convert_to_timedelta(label_dict['value'])
+  except ValueError:
+    logger.exception('Could not convert %s to timedeltastring', label_dict['value'])
+    return
+
+  total_seconds = timedelta.total_seconds()
+  logger.debug('Labeling manifest %s with expiration of %s', manifest, total_seconds)
+  model.set_tags_expiration_for_manifest(manifest, total_seconds)
+
+
+_LABEL_HANDLES = {
+  'quay.expires-after': _expires_after,
+}
+
+def apply_label_to_manifest(label_dict, manifest, model):
+  """ Runs the handler defined, if any, for the given label. """
+  handler = _LABEL_HANDLES.get(label_dict['key'])
+  if handler is not None:
+    handler(label_dict, manifest, model)