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path: root/frontend/src/sagas/gameBrowser.js
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// @flow
import { call, put, take, apply } from 'redux-saga/effects';
import { push } from 'react-router-redux';

import { normalize } from 'normalizr';
import { game as gameSchema, gameList as gameListSchema } from '../schemas/games';

import { actions as gameActions, types } from '../redux/games';
import { actions as playerActions } from '../redux/players';
import type { SevenWondersSession } from '../api/sevenWondersApi';

function* watchGames(session: SevenWondersSession): * {
  const gamesChannel = yield apply(session, session.watchGames, []);
  try {
    while (true) {
      const gameList = yield take(gamesChannel);
      const normGameList = normalize(gameList, gameListSchema);
      // for an empty game array, there is no players/games entity maps
      yield put(playerActions.updatePlayers(normGameList.entities.players || {}));
      yield put(gameActions.updateGames(normGameList.entities.games || {}));
    }
  } finally {
    yield apply(gamesChannel, gamesChannel.close);
  }
}

function* watchLobbyJoined(session: SevenWondersSession): * {
  const joinedLobbyChannel = yield apply(session, session.watchLobbyJoined, []);
  try {
    const joinedLobby = yield take(joinedLobbyChannel);
    const normalized = normalize(joinedLobby, gameSchema);
    const gameId = normalized.result;
    yield put(playerActions.updatePlayers(normalized.entities.players));
    yield put(gameActions.updateGames(normalized.entities.games));
    yield put(gameActions.enterLobby(normalized.entities.games[gameId]));
    yield put(push(`/lobby/${gameId}`));
  } finally {
    yield apply(joinedLobbyChannel, joinedLobbyChannel.close);
  }
}

function* createGame(session: SevenWondersSession): * {
  while (true) {
    const { gameName } = yield take(types.REQUEST_CREATE_GAME);
    yield apply(session, session.createGame, [gameName]);
  }
}

function* joinGame(session: SevenWondersSession): * {
  while (true) {
    const { gameId } = yield take(types.REQUEST_JOIN_GAME);
    yield apply(session, session.joinGame, [gameId]);
  }
}

function* gameBrowserSaga(session: SevenWondersSession): * {
  yield [call(watchGames, session), call(watchLobbyJoined, session), call(createGame, session), call(joinGame, session)];
}

export default gameBrowserSaga;
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