Don't let a new prompt get started when another is active

This avoids any negative side effect from a race condition where two
clients request a game to start within a short time window of each
other. When one prompt is active, the server will ignore any further
incoming requests to start a new prompt, (until the active one is
completed).

diff --git a/empathy.js b/empathy.js
index 8ecf9e10fc9bb26e2a2068a65dfb87a420138b15..29d31bf7d46fbd0595e2ad8e6b3506057da387db 100644 (file)
--- a/empathy.js
+++ b/empathy.js
@@ -43,6 +43,11 @@ class Empathy extends Game {
     if (! prompt)
       return false;
 
+    /* Ignore any start request that comes in while a prompt is
+     * already being played. */
+    if (this.state.active_prompt)
+      return false;
+
     this.state.active_prompt = prompt;
 
     this.broadcast_event_object('start', prompt);