def command(timebook, config, switch, start_time, end_time, messages, **kwargs):
# get the db
cfg=parse_config(config)
db=Database(timebook, cfg)
if switch:
commands.switch.switch(db, switch)
sheet = switch
else:
sheet = db.get_current_sheet()
timestamp_in=parse_date_time(start_time)
timestamp_out=parse_date_time(end_time)
current_start = db.get_start_time(sheet)
if current_start:
if timestamp_out > current_start[1]:
parser.error('cannot put this entry into the timesheet because ' \
'it may cause overlap with the active timer - clock out first')
message = ' '.join(messages)
put(db, sheet, timestamp_in, timestamp_out, message)
