Add memoryOnlyKeys setter option to Onyx

lib/Onyx.js

@@ -1216,6 +1216,14 @@ function update(data) {
  return clearPromise.then(() => Promise.all(_.map(promises, p => p())));
 }
 
+/**
+ * When set these keys will not be persisted to storage
+ * @param {string[]} keyList
+ */
+function setMemoryOnlyKeys(keyList) {
+ Storage.setMemoryOnlyKeys(keyList);
+}
+
 /**
  * Initialize the store with actions and listening for storage events
  *
@@ -1304,6 +1312,7 @@ const Onyx = {
  removeFromEvictionBlockList,
  isSafeEvictionKey,
  METHOD,
+ setMemoryOnlyKeys,
 };
 
 /**

lib/storage/providers/LocalForage.js

@@ -8,6 +8,7 @@ import localforage from 'localforage';
 import _ from 'underscore';
 import {extendPrototype} from 'localforage-removeitems';
 import SyncQueue from '../../SyncQueue';
+import * as Str from '../../Str';
 import fastMerge from '../../fastMerge';
 
 extendPrototype(localforage);
@@ -16,13 +17,22 @@ localforage.config({
  name: 'OnyxDB',
 });
 
+/**
+ * Keys that will not ever be persisted to disk.
+ */
+let memoryOnlyKeys = [];
+
 const provider = {
  /**
  * Writing very quickly to IndexedDB causes performance issues and can lock up the page and lead to jank.
  * So, we are slowing this process down by waiting until one write is complete before moving on
  * to the next.
  */
  setItemQueue: new SyncQueue(({key, value, shouldMerge}) => {
+ if (_.find(memoryOnlyKeys, noCacheKey => Str.startsWith(key, noCacheKey))) {
+ return Promise.resolve();
+ }
+
  if (shouldMerge) {
  return localforage.getItem(key)
  .then((existingValue) => {
@@ -125,6 +135,13 @@ const provider = {
  setItem(key, value) {
  return this.setItemQueue.push({key, value});
  },
+
+ /**
+ * @param {string[]} keyList
+ */
+ setMemoryOnlyKeys(keyList) {
+ memoryOnlyKeys = keyList;
+ },
 };
 
 export default provider;

lib/storage/providers/SQLiteStorage.js

@@ -128,6 +128,11 @@ const provider = {
  * @returns {Promise<void>}
  */
  clear: () => db.executeAsync('DELETE FROM keyvaluepairs;', []),
+
+ /**
+ * Noop on mobile for now.
+ */
+ setMemoryOnlyKeys: () => {},
 };
 
 export default provider;