Add download UI indicator, download progress, update bookshelf item to show local items and items matches with local item, remove item before downloading if already exists in file system

plugins/db.js

@@ -84,9 +84,9 @@ class DbService {
     })
   }
 
-  getLocalLibraryItems() {
+  getLocalLibraryItems(mediaType = null) {
     if (isWeb) return []
-    return AbsDatabase.getLocalLibraryItems().then((data) => {
+    return AbsDatabase.getLocalLibraryItems(mediaType).then((data) => {
       console.log('Loaded all local media items', JSON.stringify(data))
       if (data.localLibraryItems && typeof data.localLibraryItems == 'string') {
         return JSON.parse(data.localLibraryItems)
@@ -99,6 +99,11 @@ class DbService {
     if (isWeb) return null
     return AbsDatabase.getLocalLibraryItem({ id })
   }
+
+  getLocalLibraryItemByLLId(libraryItemId) {
+    if (isWeb) return null
+    return AbsDatabase.getLocalLibraryItemByLLId({ libraryItemId })
+  }
 }
 
 export default ({ app, store }, inject) => {