Add ScratchStorage subclass for getting project JSON

src/lib/storage.js

@@ -0,0 +1,26 @@
+import ScratchStorage from 'scratch-storage';
+
+const PROJECT_SERVER = 'https://projects.scratch.mit.edu';
+
+/**
+ * Wrapper for ScratchStorage which adds default web sources.
+ * @todo make this more configurable
+ */
+class Storage extends ScratchStorage {
+    constructor () {
+        super();
+        this.addWebSource( // https://github.com/babel/babel/issues/7022
+            [this.AssetType.Project],
+            projectAsset => {
+                const [projectId, revision] = projectAsset.assetId.split('.');
+                return revision ?
+                    `${PROJECT_SERVER}/internalapi/project/${projectId}/get/${revision}` :
+                    `${PROJECT_SERVER}/internalapi/project/${projectId}/get/`;
+            }
+        );
+    }
+}
+
+const storage = new Storage();
+
+export default storage;