feat: Add resetPusherInstance function

[essaji]

Fixing issue when pusher Instance is initialized multiple times

Problem

We encountered a critical bug in the project where initializing the Pusher instance multiple times for different users led to the registration of handlers/listeners multiple times. This caused unexpected behavior and performance degradation as well as crashes on android. The root cause was the absence of a mechanism to reset the Pusher instance and clear all the previous listeners and subscribed channels when a different user logged in.

Solution

To address this issue, I've introduced a new public function named resetPusherInstance to the existing class. This function is responsible for performing the necessary cleanup tasks before initializing the Pusher instance for a new user session. Here's what the solution entails:

1. New Public Function: Added a new public function resetPusherInstance to the class. This function encapsulates the logic to unsubscribe from all the previously subscribed channels and remove all the listeners/handlers associated with the current Pusher instance.

2. Usage during User Switch: Whenever a different user logs in, the resetPusherInstance function is invoked to ensure that any previous listeners and subscriptions are removed before initializing a new Pusher instance.

3. Preventing Redundant Listeners: With this change, we prevent the issue of redundant listeners being registered due to multiple Pusher instance initializations.

How This Fixes the Issue

By incorporating the resetPusherInstance function into the class, we provide a reliable way to reset the Pusher instance's state and prevent the accumulation of redundant listeners and subscriptions. This ensures that each user session starts with a clean slate, mitigating the problem of multiple initialization-related bugs.

Testing

I've thoroughly tested this solution by simulating various scenarios of user logins and Pusher instance initializations. The tests demonstrate that the resetPusherInstance function effectively clears previous state and prevents the bug from occurring.

Changes Made

• Added the resetPusherInstance function to the existing class.
• Updated relevant documentation and comments to explain the new function and its purpose.

Impact

This contribution not only addresses the bug we encountered but also improves the overall stability and performance of the project when dealing with multiple user sessions.

Additional Notes

I'm open to feedback and suggestions for further refinement of this solution. Thank you for considering this pull request.

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[fbenevides]

Thanks for the contribution.