A simple program for calculating how many hours I have worked today so far.
Here's an example input file:
$ cat example-timesheet.txt
Mon 2022-11-14
9:00-9:45 Emails
9:45-12:00 Implementing a timesheet program
# lunch time
13:15-16:00 Implementing a timesheet program
16:00-17:15 Testing the timesheet program
# I worked 7:00 today, missing 1h00, missing 1h00 in total
Tue 2022-11-15 (holiday)
9:00-9:30 Emails
# I worked 0:30 today, missing 0h00, missing 0h30 in total
Wed 2022-11-16
8:45-9:45 Emails
# short break
10:00- Documenting the timesheet program
Let's look at Wednesday first. If I run timesheet at 10:00, then it will say
that I have worked 1h00 today so far, namely from 8:45 to 9:45. Since the last
time range is open, if I run timesheet at 11:00, it will take that extra hour
into account and say that I have worked 2h00 today so far. All times are
rounded to 0h15 increments.
$ date +"%H:%M"
11:03
$ cabal run timesheet < example-timesheet.txt
I worked 2h00 today, missing 6h00, missing 6h30 in total
I aim to work 8 hours a day, so timesheet is also telling me how much time remains in order to accomplish that goal. Sometimes I go over or under that goal, in which case I track the discrepancy over time, so the 1h00 I was missing on Monday carries over to Tuesday and then Wednesday.