Rename themes -> flavours ? ?

app/javascript/flavours/glitch/reducers/local_settings.js

@@ -0,0 +1,45 @@
+//  Package imports.
+import { Map as ImmutableMap } from 'immutable';
+
+//  Our imports.
+import { STORE_HYDRATE } from 'flavours/glitch/actions/store';
+import { LOCAL_SETTING_CHANGE } from 'flavours/glitch/actions/local_settings';
+
+const initialState = ImmutableMap({
+  layout    : 'auto',
+  stretch   : true,
+  navbar_under : false,
+  side_arm  : 'none',
+  collapsed : ImmutableMap({
+    enabled     : true,
+    auto        : ImmutableMap({
+      all              : false,
+      notifications    : true,
+      lengthy          : true,
+      reblogs          : false,
+      replies          : false,
+      media            : false,
+    }),
+    backgrounds : ImmutableMap({
+      user_backgrounds : false,
+      preview_images   : false,
+    }),
+  }),
+  media     : ImmutableMap({
+    letterbox   : true,
+    fullwidth   : true,
+  }),
+});
+
+const hydrate = (state, localSettings) => state.mergeDeep(localSettings);
+
+export default function localSettings(state = initialState, action) {
+  switch(action.type) {
+  case STORE_HYDRATE:
+    return hydrate(state, action.state.get('local_settings'));
+  case LOCAL_SETTING_CHANGE:
+    return state.setIn(action.key, action.value);
+  default:
+    return state;
+  }
+};