Fix #463 - Fetch and display previews of URLs using OpenGraph tags

app/assets/javascripts/components/reducers/cards.jsx

@@ -0,0 +1,14 @@
+import { STATUS_CARD_FETCH_SUCCESS } from '../actions/cards';
+
+import Immutable from 'immutable';
+
+const initialState = Immutable.Map();
+
+export default function cards(state = initialState, action) {
+  switch(action.type) {
+  case STATUS_CARD_FETCH_SUCCESS:
+    return state.set(action.id, Immutable.fromJS(action.card));
+  default:
+    return state;
+  }
+};

app/assets/javascripts/components/reducers/index.jsx

@@ -13,6 +13,7 @@ import search from './search';
 import notifications from './notifications';
 import settings from './settings';
 import status_lists from './status_lists';
+import cards from './cards';
 
 export default combineReducers({
   timelines,
@@ -28,5 +29,6 @@ export default combineReducers({
   relationships,
   search,
   notifications,
-  settings
+  settings,
+  cards
 });