2 files changed, 49 insertions, 0 deletions
diff --git a/app/javascript/flavours/glitch/reducers/index.js b/app/javascript/flavours/glitch/reducers/index.js
index ae9e2b639..5b1ec4abc 100644
--- a/app/javascript/flavours/glitch/reducers/index.js
+++ b/app/javascript/flavours/glitch/reducers/index.js
@@ -26,6 +26,7 @@ import height_cache from './height_cache';
 import custom_emojis from './custom_emojis';
 import lists from './lists';
 import listEditor from './list_editor';
+import listAdder from './list_adder';
 import filters from './filters';
 import pinnedAccountsEditor from './pinned_accounts_editor';
 
@@ -57,6 +58,7 @@ const reducers = {
   custom_emojis,
   lists,
   listEditor,
+  listAdder,
   filters,
   pinnedAccountsEditor,
 };
diff --git a/app/javascript/flavours/glitch/reducers/list_adder.js b/app/javascript/flavours/glitch/reducers/list_adder.js
new file mode 100644
index 000000000..b8c1b0e26
--- /dev/null
+++ b/app/javascript/flavours/glitch/reducers/list_adder.js
@@ -0,0 +1,47 @@
+import { Map as ImmutableMap, List as ImmutableList } from 'immutable';
+import {
+  LIST_ADDER_RESET,
+  LIST_ADDER_SETUP,
+  LIST_ADDER_LISTS_FETCH_REQUEST,
+  LIST_ADDER_LISTS_FETCH_SUCCESS,
+  LIST_ADDER_LISTS_FETCH_FAIL,
+  LIST_EDITOR_ADD_SUCCESS,
+  LIST_EDITOR_REMOVE_SUCCESS,
+} from '../actions/lists';
+
+const initialState = ImmutableMap({
+  accountId: null,
+
+  lists: ImmutableMap({
+    items: ImmutableList(),
+    loaded: false,
+    isLoading: false,
+  }),
+});
+
+export default function listAdderReducer(state = initialState, action) {
+  switch(action.type) {
+  case LIST_ADDER_RESET:
+    return initialState;
+  case LIST_ADDER_SETUP:
+    return state.withMutations(map => {
+      map.set('accountId', action.account.get('id'));
+    });
+  case LIST_ADDER_LISTS_FETCH_REQUEST:
+    return state.setIn(['lists', 'isLoading'], true);
+  case LIST_ADDER_LISTS_FETCH_FAIL:
+    return state.setIn(['lists', 'isLoading'], false);
+  case LIST_ADDER_LISTS_FETCH_SUCCESS:
+    return state.update('lists', lists => lists.withMutations(map => {
+      map.set('isLoading', false);
+      map.set('loaded', true);
+      map.set('items', ImmutableList(action.lists.map(item => item.id)));
+    }));
+  case LIST_EDITOR_ADD_SUCCESS:
+    return state.updateIn(['lists', 'items'], list => list.unshift(action.listId));
+  case LIST_EDITOR_REMOVE_SUCCESS:
+    return state.updateIn(['lists', 'items'], list => list.filterNot(item => item === action.listId));
+  default:
+    return state;
+  }
+};