Improve series index performance during series refresh

frontend/src/Store/Selectors/createSeriesClientSideCollectionItemsSelector.js

@@ -0,0 +1,36 @@
+import { createSelector } from 'reselect';
+import createDeepEqualSelector from './createDeepEqualSelector';
+import createClientSideCollectionSelector from './createClientSideCollectionSelector';
+
+function createUnoptimizedSelector(uiSection) {
+  return createSelector(
+    createClientSideCollectionSelector('series', uiSection),
+    (series) => {
+      const items = series.items.map((s) => {
+        const {
+          id,
+          sortTitle
+        } = s;
+
+        return {
+          id,
+          sortTitle
+        };
+      });
+
+      return {
+        ...series,
+        items
+      };
+    }
+  );
+}
+
+function createSeriesClientSideCollectionItemsSelector(uiSection) {
+  return createDeepEqualSelector(
+    createUnoptimizedSelector(uiSection),
+    (series) => series
+  );
+}
+
+export default createSeriesClientSideCollectionItemsSelector;