Don't delay messages behind each other by 750ms

config/config.sample.yaml

@@ -87,5 +87,9 @@ channel:
        # Make all the discord users leave the room.
        ghostsLeave: true
 limits:
-    # Delay between discord users joining a room.
+    # Delay in milliseconds between discord users joining a room.
     roomGhostJoinDelay: 6000
+    # Delay in milliseconds before sending messages to discord to avoid echos.
+    # (Copies of a sent message may arrive from discord before we've
+    # fininished handling it, causing us to echo it back to the room)
+    discordSendDelay: 750

config/config.schema.yaml

@@ -89,6 +89,8 @@ properties:
         properties:
             roomGhostJoinDelay:
                 type: "number"
+            discordSendDelay:
+                type: "number"
     channel:
         type: "object"
         properties:

src/bot.ts

@@ -119,11 +119,11 @@ export class DiscordBot {
             Bluebird.delay(this.config.limits.discordSendDelay),
         ]).then(() => this.OnMessageUpdate(oldMessage, newMessage));
       });
-      client.on("message", (msg: Discord.Message) => {
-        this.discordMessageQueue[msg.channel.id] = (async () => {
-            await (this.discordMessageQueue[msg.channel.id] || Promise.resolve());
+      client.on("message", async (msg: Discord.Message) => {
         // tslint:disable-next-line:await-promise
         await Bluebird.delay(this.config.limits.discordSendDelay);
+        this.discordMessageQueue[msg.channel.id] = (async () => {
+            await (this.discordMessageQueue[msg.channel.id] || Promise.resolve());
             await this.OnMessage(msg);
         })();
       });