1 files changed, 51 insertions, 0 deletions
diff --git a/frontend/src/redux/games.ts b/frontend/src/redux/games.ts
new file mode 100644
index 00000000..5e21211a
--- /dev/null
+++ b/frontend/src/redux/games.ts
@@ -0,0 +1,51 @@
+import { List, Map } from 'immutable';
+import { combineReducers } from 'redux';
+import { ApiLobby } from '../api/model';
+import { GlobalState } from '../reducers';
+import { Action } from './actions/all';
+import { ENTER_LOBBY, UPDATE_GAMES } from './actions/lobby';
+
+export type GamesState = {
+  all: Map<string, ApiLobby>,
+  current: string | null
+};
+
+export const createGamesReducer = () => {
+  return combineReducers({
+    all: allGamesReducer,
+    current: currentGameIdReducer
+  })
+};
+
+export const allGamesReducer = (state: Map<string, ApiLobby> = Map(), action: Action) => {
+  switch (action.type) {
+    case UPDATE_GAMES:
+      const newGames = mapify(action.games);
+      return state.merge(newGames);
+    default:
+      return state;
+  }
+};
+
+function mapify(games: ApiLobby[]): Map<string, ApiLobby> {
+  let newGames: {[id:string]:ApiLobby} = {};
+  games.forEach(g => newGames[`${g.id}`] = g);
+  return Map(newGames);
+}
+
+export const currentGameIdReducer = (state: string | null = null, action: Action) => {
+  switch (action.type) {
+    case ENTER_LOBBY:
+      return `${action.gameId}`;
+    default:
+      return state;
+  }
+};
+
+export const getAllGames = (state: GlobalState): List<ApiLobby> => state.games.all.toList();
+export const getCurrentGame = (state: GlobalState): ApiLobby | null => {
+  if (state.games.current == null) {
+    return null;
+  }
+  return state.games.all.get(state.games.current) || null;
+};