Insert state into strategic components rather than entire app

client/source/scripts/reducers/torrentsReducer.js

@@ -1,10 +1,42 @@
-export default function torrentsReducer(state = [], action) {
+import { selectTorrents } from '../util/selectTorrents';
+
+const initialState = {
+  selectedTorrents: [],
+  torrents: []
+};
+
+export default function torrentsReducer(state = initialState, action) {
   switch (action.type) {
+    case 'CLICK_TORRENT':
+      let event = action.payload.event;
+      let hash = action.payload.hash;
+      let selectedTorrents = Object.assign([], state.selectedTorrents);
+      let torrentList = action.payload.torrentList;
+
+      selectedTorrents = selectTorrents({
+        event,
+        hash,
+        selectedTorrents,
+        torrentList
+      });
+
+      return Object.assign(
+        {},
+        state,
+        {
+          ...state,
+          selectedTorrents: selectedTorrents
+        }
+      );
+
     case 'RECEIVE_TORRENTS':
       return Object.assign(
-        [],
+        {},
         state,
-        action.payload.torrents
+        {
+          ...state,
+          torrents: action.payload.torrents
+        }
       );
 
     default: