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prail/class_filter.awk

Created July 27, 2024 17:15
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Eagles Nest Class Calendar Filter/Generator
Raw
class_filter.awk
# ICS file filter
BEGIN {
FS = ":"
buffer = ""
notevent = 0
}
($1~/^BEGIN/ && $2~/VEVENT/) {
keep = 1;
}
($1~/^BEGIN/ && $2!~/VEVENT/) {
notevent = 1;
}
$1~/SUMMARY/ && notevent==0 {
if ($2~/[A-Z]{2} [0-9]{3}.+[0-9]+.*/)
{
keep = 1;
}
else
{
# clear the event buffer and inform not to keep whole record
buffer = "";
keep = 0;
}
}
notevent==0 {
if (keep==1)
{
buffer=buffer$0"\n"
}
}
($1~/^END/ && $2~/VEVENT/) {
if (keep == 1)
{
printf("%s", buffer);
buffer = "";
keep = 0;
}
}
($1~/^END/ && $2!~/VEVENT/) {
notevent = 0;
print $0;
}
notevent==1 { print $0 }
Raw
gen_calendar.sh
#!/bin/bash
CALENDAR_URL="put_your_eagles_nest_calendar_url_here"
wget -q -O - "${CALENDAR_URL/webcal/http}" | awk -f ./class_filter.awk > class_calendar.ics
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