}
}
+/* This replacer function allows for JSON.stringify to give results
+ * for objects of various types that are used in game state.
+ */
+function stringify_replacer(key, value) {
+ if (typeof value === 'object' && value instanceof Set) {
+ return [...value];
+ }
+ return value;
+}
+
/* Base class providing common code for game engine implementations. */
class Game {
constructor(id) {
/* Finally, if this game class has a "state" property, stream that
* current state to the client. */
if (this.state) {
- const state_json = JSON.stringify(this.state);
+ const state_json = JSON.stringify(this.state, stringify_replacer);
response.write(`event: game-state\ndata: ${state_json}\n\n`);
}
}