storage: add getStatus hook

src/storage/interface.js

@@ -12,6 +12,7 @@
 //     them to tune the concurrency based on failures/rate limits accordingly
 exports = module.exports = {
     getAvailableSize,
+    getStatus,
 
     upload,
 
@@ -53,6 +54,13 @@ async function getAvailableSize(apiConfig) {
     return Number.POSITIVE_INFINITY;
 }
 
+async function getStatus(apiConfig) {
+    assert.strictEqual(typeof apiConfig, 'object');
+
+    // Result: { state, message } . state is 'active' or 'inactive'
+    throw new BoxError(BoxError.NOT_IMPLEMENTED, 'getStatus is not implemented');
+}
+
 async function upload(apiConfig, backupFilePath) {
     assert.strictEqual(typeof apiConfig, 'object');
     assert.strictEqual(typeof backupFilePath, 'string');