start on pseudocursor

packages/node_modules/pouchdb-adapter-idb/src/pseudoCursor.js

diff --git a/packages/node_modules/pouchdb-adapter-idb/src/pseudoCursor.js b/packages/node_modules/pouchdb-adapter-idb/src/pseudoCursor.js
new file mode 100644
index 0000000..a73f947
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+++ b/packages/node_modules/pouchdb-adapter-idb/src/pseudoCursor.js
@@ -0,0 +1,34 @@
+// Abstraction over IDBCursor and getAll()/getAllKeys() that allows us to batch our operations
+// while falling back to a normal IDBCursor operation on browsers that don't support getAll() or
+// getAllKeys(). This allows for a much faster implementation than just straight-up cursors.
+function pseudoCursor(txn, objectStore, keyRange, descending, batchSize, onBatch) {
+
+  var useGetAll = typeof objectStore.getAll === 'function' &&
+    typeof objectStore.getAllKeys === 'function' && batchSize > 1 && !descending;
+
+  var cursorReq;
+  var getAllReq;
+  var getAllKeysReq;
+
+  if (useGetAll) {
+  } else {
+
+  }
+
+
+
+  txn.onabort = idbError(opts.complete);
+  txn.oncomplete = onTxnComplete;
+
+
+  function continueFunc() {
+
+  }
+
+  return {
+    "continue": continueFunc;
+  }
+
+}
+
+export default pseudoCursor;
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