Refactor deleting everything from database

src/packager/cache.js

@@ -68,22 +68,7 @@ const set = async (asset, content) => {
   });
 };
 
-const resetAll = async () => {
-  const {transaction, store} = await db.createTransaction('readwrite');
-  return new Promise((resolve, reject) => {
-    Database.setTransactionErrorHandler(transaction, reject);
-    const request = store.openCursor();
-    request.onsuccess = e => {
-      const cursor = e.target.result;
-      if (cursor) {
-        cursor.delete();
-        cursor.continue();
-      } else {
-        resolve();
-      }
-    };
-  });
-};
+const resetAll = () => db.deleteEverything();
 
 export default {
   get,

src/packager/lib/idb.js

@@ -67,7 +67,24 @@ class Database {
     };
   }
 
-  onopen () { 
+  async deleteEverything () {
+    const {transaction, store} = await this.createTransaction('readwrite');
+    return new Promise((resolve, reject) => {
+      Database.setTransactionErrorHandler(transaction, reject);
+      const request = store.openCursor();
+      request.onsuccess = e => {
+        const cursor = e.target.result;
+        if (cursor) {
+          cursor.delete();
+          cursor.continue();
+        } else {
+          resolve();
+        }
+      };
+    });
+  }
+
+  onopen () {
     return Promise.resolve();
   }
 }