Repeated notification for same intersection and redundant intersection checks

[tremblerz]

The way we are checking for intersection is based on storing data and checking it periodically and sending a notification if an intersection is found. Now the issue here is that the intersection which happened 5 days ago will get flagged again when it is found on the next day as an intersection which happened 6 days ago.

We need to find a way to get rid of the duplicate notifications in the time domain. This, in general, also brings the point that right now we check for whole intersection every 12 hours which might not be a good idea, especially when the public json files would be larger.

[harshvitra]

One possible solution is that when we check for intersection we store the timestamp in the Local Storage

If there is no timestamp - check entire public json
If there is timestamp - we only check values higher than the timestamp