SIP-32: Moving frontend code to the base of the repo (#9098)

* move assets out, get webpack dev working

* update docs to reference superset-frontend

* draw the rest of the owl

* fix docs

* fix webpack script

* rats

* correct docs

* fix tox dox

superset-frontend/src/SqlLab/utils/reduxStateToLocalStorageHelper.js

@@ -0,0 +1,68 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+import { LOCALSTORAGE_MAX_QUERY_AGE_MS } from '../constants';
+
+const PERSISTENT_QUERY_EDITOR_KEYS = new Set([
+  'remoteId',
+  'autorun',
+  'dbId',
+  'height',
+  'id',
+  'latestQueryId',
+  'northPercent',
+  'queryLimit',
+  'schema',
+  'selectedText',
+  'southPercent',
+  'sql',
+  'templateParams',
+  'title',
+]);
+
+export function emptyQueryResults(queries) {
+  return Object.keys(queries).reduce((accu, key) => {
+    const { startDttm, results } = queries[key];
+    const query = {
+      ...queries[key],
+      results:
+        Date.now() - startDttm > LOCALSTORAGE_MAX_QUERY_AGE_MS ? {} : results,
+    };
+
+    const updatedQueries = {
+      ...accu,
+      [key]: query,
+    };
+    return updatedQueries;
+  }, {});
+}
+
+export function clearQueryEditors(queryEditors) {
+  return queryEditors.map(editor =>
+    // only return selected keys
+    Object.keys(editor)
+      .filter(key => PERSISTENT_QUERY_EDITOR_KEYS.has(key))
+      .reduce(
+        (accumulator, key) => ({
+          ...accumulator,
+          [key]: editor[key],
+        }),
+        {},
+      ),
+  );
+}