Develop a timelogger. It should allow you to record time spent doing a task and give you a summary of all the tasks you did on a given day/week.
Here's how it will work, you say timelogger <taskname>. <taskname> is the task you just did. You should store the current timestamp and the <taskname>. So, the time you spent on <taskname> is the difference between times of <taskname> and previous
task. You won't count the amount of time for the very first task.
E.g.
$ timelogger arrived
$ timelogger coffee
$ timelogger school_one
$ timelogger lunch
$ timelogger school_one
In the above example, you ignore arrived. The amount of time spent on coffee is the difference between the times of coffee and arrived. Similarly for lunch. However, the time spent on school_one is the sum of school_one - coffee and school_one - lunch.
You should display the results prettily.
$ timelogger
0h 00m arrived
0h 30m coffee
4h 00m school_one
1h 00m lunch
4h 00m school_one
The --date=2014-01-01 option must display timesheet for that particular date. (If there is no such option, display for today).
The --task=school_one option must display the total amount of time spent on that project on the given day.
timelogger --task=school_one
8h 00m school_one
Bonus points if you implement a date range. The --from=2014-01-01 and --to=2014-01-06 should display all the tasks from the from date to the to date. If only from option is given and no to option is given, default the to option to current day. And --task=school_one --from=2014-01-01 --to=2014-01-06 should display the total amount of time spent on school_one on all these days.