Friends activity monitoring

Taking advantage of the large amount of free time and the lack of a large list of important matters (in August I broke my leg, it is possible to move only on crutches, I spend a lot of time at the computer), I wrote a small script to monitor the activity of friends in one of the popular social networks. Many people are too lazy to go for a habrak, so the link right here is VKWatch .
The activity statistics of one of my friends for yesterday is right here .




Used: Perl , MySQL , Google Chart .
In the process of writing I regretted that I did not use Google Chart before, it is a very convenient and extremely useful thing. A bot comes into my account every few minutes, pulls out and parses a list of friends with the “Online” status, carefully writes them to the database, after which you can see the charts of friends by the hour on the charts. If you want to check how it all works - you can add me as a friend. My account is here , send invitations with the note “VKWatch” or something like that.
As the database grows, it will be decided how many days to store the statistics.