[email protected] wrote:
I would like to fetch date/time from html file, and use date comparison
and make an ics/vcal file eventually
the date comes as so:
<tr><td colspan="1" rowspan="1">Start Date Time: </td><td colspan="1"
rowspan="1">20/03/2014 1400 Thursday</td></tr>
is 'grep -o' the way to go ? what regex do I need where I put ???? ?
grep -o '<tr><td colspan="1" rowspan="1">Start Date Time: </td><td
colspan="1" rowspan="1">????</td></tr>'
I would recommend egrep and use the following extended regular expression:
egrep -o '[0-9]{2}/[0-9]{2}/[0-9]{4}[[:space:]][0-9]{4}'
which gives you output like the following:
20/03/2014 1400
19/02/2014 1553
03/01/2013 0114
03/11/2012 1514
as a contrived example containing four dates as in your example.
what do I need to do with date to be able to compare it to a date range?
If you use the ISO 8601 format for all dates/times in your script, life will
be a lot easier, e.g.
convert "20/03/2014 1400" to "20130320T1400", store it in $datetime
Then you can specify a date/time range on the command line as your lower
and upper bounds, $datelow and $datehigh, for comparison purposes, e.g.
my_date_script.bash 20100101T0000 20141231T2359
and inside the script only accept date/times within range:
if [ "$datelow" \> "$datetime" -o "$datetime" \> "$datehigh" ]; then
echo Datetime $datetime is not in range [ $datelow, $datehigh ]
else
echo Found datetime $datetime
fi
Of course, all of this would be much easier to code in python, perl or ruby.
HTH!
cheers
rickw
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Rick Welykochy || Vitendo Consulting
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