Server needs to accept at least one post to allow offline capabilities

[maberer]

Thanks for the great demo!

Nevertheless, I think there is an issue related to the offline capabilities of the app when
the server is not running while a first message is posted.

In this case, the new post is stored but the user is not.

https://github.com/yigit/dev-summit-architecture-demo/blob/master/client/app/src/main/java/com/android/example/devsummit/archdemo/job/post/SaveNewPostJob.java#L98

When the "NewPostEvent " event is fired and the post should be added to the list, the user is not found because it has not been saved to the datastore. As a consequence, "user" is null in the following line:

https://github.com/yigit/dev-summit-architecture-demo/blob/master/client/app/src/main/java/com/android/example/devsummit/archdemo/model/FeedModel.java#L74

Because "users" is empty, the result array is empty.

https://github.com/yigit/dev-summit-architecture-demo/blob/master/client/app/src/main/java/com/android/example/devsummit/archdemo/model/FeedModel.java#L73

So the post is never added to the list.

To get the expected behavior, the server has to run/respond at least the first time
a post is made. If this is the case, the returned user is added to the local datastore.

https://github.com/yigit/dev-summit-architecture-demo/blob/master/client/app/src/main/java/com/android/example/devsummit/archdemo/job/post/SaveNewPostJob.java#L116

In the case outlined above, this line never runs and posts never appear.

I do not think that this is intended behavior.

What do you think?