fix(real-time): try to subscribe only if connected

src/lib/real-time.ts

@@ -112,15 +112,25 @@ export default class SlackRealTime {
       }])
     })
 
-    // This is added because Slack has changed their policies and now you'll need to subscribe for each user
-    // @see https://api.slack.com/changelog/2017-10-making-rtm-presence-subscription-only
-    // @ts-expect-error
-    await this.rtm.start({ batch_presence_aware: 1 })
+    try {
+      // This is added because Slack has changed their policies and now you'll need to subscribe for each user
+      // @see https://api.slack.com/changelog/2017-10-making-rtm-presence-subscription-only
+      // @ts-expect-error
+      await this.rtm.start({ batch_presence_aware: 1 })
+    } catch (error) {
+      return console.error(error)
+    }
   }
 
   subscribeToPresence = async (users: string[]): Promise<void> => {
-    const alreadySubscribed = Object.keys(this.userPresence)
-    await this.rtm.subscribePresence(users.filter(id => !alreadySubscribed.includes(id)))
+    try {
+      if (this.rtm.connected) {
+        const alreadySubscribed = Object.keys(this.userPresence)
+        await this.rtm.subscribePresence(users.filter(id => !alreadySubscribed.includes(id)))
+      }
+    } catch (error) {
+      return console.error(error)
+    }
   }
 
   async dispose() {