Add GetRevision() to Event API

Signed-off-by: Matheus Pimenta <[email protected]>

apis/event/v1beta1/event.go

@@ -91,3 +91,15 @@ func (in *Event) HasMetadata(key string, val string) bool {
 	}
 	return false
 }
+
+// GetRevision looks up for the MetaOriginRevisionKey and MetaRevisionKey
+// keys in the Metadata and returns the first it finds.
+func (in *Event) GetRevision() (string, bool) {
+	if r, ok := in.Metadata[MetaOriginRevisionKey]; ok {
+		return r, true
+	}
+	if r, ok := in.Metadata[MetaRevisionKey]; ok {
+		return r, true
+	}
+	return "", false
+}