--- /dev/null
+#!/bin/zsh
+
+cgi_post
+
+course="$_POST[\"course\"]"
+tempfile="temp/$course"
+coursefile="ical/$course"
+
+# DURATION:
+uid="$_POST[\"UID\"]"
+
+tzid=$(cat /etc/timezone)
+tstamp=$(TZ="$tzid" date +%Y%m%dT%H%M%S)
+
+dts_year="$_POST[\"DTSYEAR\"]"
+dts_month="$_POST[\"DTSMONTH\"]"
+dts_day="$_POST[\"DTSDAY\"]"
+[ -n "$_POST[\"DTSDAY0\"]" ] && dts_day="$_POST[\"DTSDAY0\"]"
+dts_hour="$_POST[\"DTSHOUR\"]"
+dts_minute="$_POST[\"DTSMINUTE\"]"
+
+[ -z $dts_year ] && dts_year=$(date +%Y)
+[ -z $dts_month ] && dts_month=$(date +%m)
+[ -z $dts_day ] && dts_day=$(date +%d)
+date -d ${dts_year}-${dts_month}-${dts_day} >/dev/null 2>/dev/null || dts_day="01"
+[ -z $dts_hour ] && dts_hour=$(date +%H)
+[ -z $dts_minute ] && dts_minute=$(date +%M)
+
+dtstart="TZID=${tzid}:${dts_year}${dts_month}${dts_day}T${dts_hour}${dts_minute}00"
+
+rr_int="$_POST[\"RRULE_INTERVAL\"]"
+rr_freq="$_POST[\"RRULE_FREQ\"]"
+rr_limit="$_POST[\"RRULE_LIMIT\"]"
+case "$rr_limit" in
+ ETERN)
+ rrule="FREQ=$rr_freq;INTERVAL=$rr_int"
+ ;;
+ COUNT)
+ t="$_POST[\"RRULE_COUNT\"]"
+ rrule="FREQ=$rr_freq;INTERVAL=$rr_int;COUNT=$t"
+ ;;
+ UNTIL)
+ uy="$_POST[\"RRULE_UYEAR\"]"
+ um="$_POST[\"RRULE_UMONTH\"]"
+ ud="$_POST[\"RRULE_UDAY\"]"
+ rrule="FREQ=$rr_freq;INTERVAL=$rr_int;UNTIL=${uy}${um}${ud}T000000Z"
+ ;;
+esac
+
+echo "BEGIN:VCALENDAR\r" >"$tempfile"
+echo "VERSION:2.0\r" >>"$tempfile"
+echo "PRODID:Berlin RAW Confetti\r" >>"$tempfile"
+echo "BEGIN:VEVENT\r" >>"$tempfile"
+echo "UID:$uid\r" >>"$tempfile"
+echo "DTSTAMP:TZID=${tzid}:${tstamp}\r" >>"$tempfile"
+echo "DTSTART:${dtstart}\r" >>"$tempfile"
+echo "RRULE:${rrule}\r" >>"$tempfile"
+for field in SUMMARY COMMENT; do
+ value="$_POST[\"$field\"]"
+ n=0
+ while [ -n "$value" ]; do
+ value="$(echo "$value" |sed -r ':a;N;$!ba;s:\n:\\\\n:g;s:\r:\\\\r:g')"
+ echo "${field}:${value}\r"
+ value="$_POST[\"$field$n\"]"
+ n=$(($n + 1))
+ done
+done >>"$tempfile"
+
+case "$_POST[\"action\"]" in
+ addfield)
+ echo "$_POST[\"newfield\"]:\r" >>"$tempfile"
+ echo "END:VEVENT\r" >>"$tempfile"
+ echo "END:VCALENDAR\r" >>"$tempfile"
+ echo -n "Location: http://$HTTP_HOST/?page=courses&edit=$course\n\n"
+ ;;
+ update)
+ echo "END:VEVENT\r" >>"$tempfile"
+ echo "END:VCALENDAR\r" >>"$tempfile"
+ mv "$tempfile" "$coursefile"
+ echo -n "Location: http://$HTTP_HOST/?page=courses#$course\n\n"
+ ;;
+ cancel)
+ rm "$tempfile"
+ [ -f "$coursefile" ] \
+ && echo -n "Location: http://$HTTP_HOST/?page=courses#$course\n\n" \
+ || echo -n "Location: http://$HTTP_HOST/?page=courses\n\n"
+ ;;
+ delete)
+ rm "$tempfile" "$coursefile"
+ echo -n "Location: http://$HTTP_HOST/?page=courses\n\n"
+ ;;
+ *)
+ echo "END:VEVENT\r" >>"$tempfile"
+ echo "END:VCALENDAR\r" >>"$tempfile"
+ echo -n "Location: http://$HTTP_HOST/?page=courses&edit=$course\n\n"
+ ;;
+esac