Add:Lazy bookshelf

plugins/constants.js

@@ -0,0 +1,26 @@
+const DownloadStatus = {
+  PENDING: 0,
+  READY: 1,
+  EXPIRED: 2,
+  FAILED: 3
+}
+
+const CoverDestination = {
+  METADATA: 0,
+  AUDIOBOOK: 1
+}
+
+const BookCoverAspectRatio = {
+  STANDARD: 0,
+  SQUARE: 1
+}
+
+const Constants = {
+  DownloadStatus,
+  CoverDestination,
+  BookCoverAspectRatio
+}
+
+export default ({ app }, inject) => {
+  inject('constants', Constants)
+}