def get_busy_free_times(events, dStart, dEnd, tStart, tEnd):
busytimes = []
freetimes = []
begin = arrow.get(dStart)
end = arrow.get(dEnd)
time_begin = combine_date_time(begin, arrow.get(tStart))
time_end = combine_date_time(begin, arrow.get(tEnd))
i = 0
for day in arrow.Arrow.range('day',begin,end):
busytimes_today = Agenda()
for e in events[i:]:
if same_date(day.isoformat(), e['start']):
busytimes_today.append(Appt.from_iso_date(e['start'],e['end'],'Busy')) #using 'Busy' because we don't want private info any further
i = i+1
#we have all busy times for a single day now
#lets generate free times from busy times and and append both to their respective arrays
timeframe = Appt.from_iso_date(time_begin,time_end,"Free Time")
freetimes.append(busytimes_today.complement(timeframe))
busytimes.append(busytimes_today.normalized())
#advance the day to sync with the next iteration
time_begin = next_day(time_begin)
time_end = next_day(time_end)
#return this as a dict of the free and busy times
return {"busy":busytimes, "free":freetimes}
