Migrate to seamless immutable

Resolves:
https://github.com/luxons/seven-wonders/issues/6

1 files changed, 23 insertions, 0 deletions

diff --git a/frontend/src/sagas/errors.js b/frontend/src/sagas/errors.js
new file mode 100644
index 00000000..6d4df93d
--- /dev/null
+++ b/frontend/src/sagas/errors.js
@@ -0,0 +1,23 @@
+import { apply, call, cancelled, put, take } from 'redux-saga/effects'
+
+import { createSubscriptionChannel } from '../utils/websocket'
+import { actions } from '../redux/errors'
+
+export default function *errorHandlingSaga({ socket }) {
+  const errorChannel = yield call(createSubscriptionChannel, socket, '/user/queue/error')
+  try {
+    while (true) {
+      const error = yield take(errorChannel)
+      yield* handleOneError(error)
+    }
+  } finally {
+    if (yield cancelled()) {
+      yield apply(errorChannel, errorChannel.close)
+    }
+  }
+}
+
+function *handleOneError(error) {
+  console.error("Error received on web socket channel", error)
+  yield put(actions.errorReceived(error))
+}