Set the Islands
Explore how to mark islands as set by players using Phoenix Channels to broadcast updates and handle replies. Learn to manage real-time state changes in an Elixir OTP backend, ensuring proper in-game communication and state tracking.
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Mark the islands as set
Once players are done moving their islands around, they need to mark their islands as a set in place. The Channel only needs to pass an atom that represents the player down to Game.set_islands/2 and pattern match on the result to send the right response.
A player successfully setting his islands is something we want both players to know about, so we use broadcast!/3 to respond when Game.set_islands/2 succeeds. If it fails, we want to let only that player know, so we use a :reply tuple.
To make it easier for any front-end code to display all the islands once they are set successfully, we will also have to send a :reply tuple with the full map of the islands. We send this only to the caller since we would not want the opponent to see this.
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