Remember sort plugin

plugins/talk-plugin-remember-sort/client/index.js

@@ -0,0 +1,34 @@
+import {setSort} from 'plugin-api/beta/client/actions/stream';
+import {sortOrderSelector, sortBySelector} from 'plugin-api/beta/client/selectors/stream';
+
+const STORAGE_PATH = 'talkPluginRememberSort';
+
+export default {
+  init: ({store, storage, introspection}) => {
+
+    // TODO: workaround as this plugin is included in any target and
+    // embeds (e.g. admin), but should only be included inside the stream.
+
+    // Detect if we are currently running inside the stream.
+    if (!store.getState().stream) {
+      return;
+    }
+
+    const sort = JSON.parse(storage.getItem(STORAGE_PATH));
+    if (
+      sort &&
+      introspection.isValidEnumValue('SORT_ORDER', sort.sortOrder) &&
+      introspection.isValidEnumValue('SORT_COMMENTS_BY', sort.sortBy)
+    ) {
+      store.dispatch(setSort(sort));
+    }
+    store.subscribe(() => {
+      const state = store.getState();
+      const sortOrder = sortOrderSelector(state);
+      const sortBy = sortBySelector(state);
+      if (!sort || sort.sortOrder !== sortOrder || sort.sortBy !== sortBy) {
+        storage.setItem(STORAGE_PATH, JSON.stringify({sortOrder, sortBy}));
+      }
+    });
+  }
+};