addevent - command to add events to Calendar (previously called iCal)

addevent

#!/usr/bin/env bash

set -e

abort() { echo "$@" 1>&2; exit 1; }

USAGE="
Usage: $0 [-xhn] [-c CAL_NUMBER] [-i INTERVAL] [-t DURATION] (-D DATETIME | -S SECONDS | -M MINUTES | -H HOURS | -d DAYS) TITLE
-x) Debug (show all commands)
-h) help
-n) no alarm
-D) date as YYYYmmdd or YYYYmmddHH or YYYYmmddHHMM
-S) seconds later
-M) minutes later
-H) hours later
-d) days later
-c) calendar number
-i) interval in minutes between the event and the alarm.
    positive for alarm that trigger after the event date or negative for alarms that trigger before.
-t) event duration in minutes

Example:
# add an event 3 hours later
addevent -H 3 \"go outside to Ka'anapali Beach\"

# 2 days later
addevent -d 2 'Arima Onsen'

# specific datetime
addevent -D 20170707 'Grace Bay'

# specify the calendar
addevent -c 1 -M 30 \"Dag-walking\"
"

which osalang &> /dev/null || abort "osalang not found"
which osascript &> /dev/null || abort "osascript not found"
osalang | grep JavaScript &> /dev/null || abort "couldn't use Javascript. Must be OS X > 10.10"

unset SET_ALARM
unset DATETIME
unset SECONDS
unset MINUTES
unset HOURS
unset DAYS
unset CAL_NUM
unset INTERVAL
unset DURATION

while getopts xhnD:S:M:H:d:c:i:t: option; do
  case $option in
    x) set -x;;
    n) SET_ALARM="false";;
    D) DATETIME="$OPTARG";;
    S) SECONDS="$OPTARG";;
    M) MINUTES="$OPTARG";;
    H) HOURS="$OPTARG";;
    d) DAYS="$OPTARG";;
    c) CAL_NUM="$OPTARG";;
    i) INTERVAL="$OPTARG";;
    t) DURATION="$OPTARG";;
    h|\?) abort "$USAGE"
  esac
done
shift `expr "$OPTIND" - 1`

# cxheck if the arguments is enough
[[ $# -gt 0 ]] || abort "$USAGE"
TITLE="$1"

# default values
: ${SET_ALARM:="true"}
: ${INTERVAL:=-1}
: ${DATETIME:=`date +"%Y%m%d%H%M%S"`}

# default duration is 30 minutes
DEFAULT_DURATION=30

# default duration to 24 hours if datetime is like 20160123
[[ ${#DATETIME} -le 8 ]] && DEFAULT_DURATION=1439
# padding 0
while [[ ${#DATETIME} -lt 14 ]]; do DATETIME+="0"; done
# force length to be 14
DATETIME=`echo -n $DATETIME | cut -c -14`
# validate datetime
date -jf "%Y%m%d%H%M%S" "${DATETIME}" +"%s" &> /dev/null || abort "invalid datetime $DATETIME. make sure datetime is like 20160123, 2016012306, or 201601230645"

# convert evenry time representation to seconds
[[ $DAYS ]] && DATETIME="`date -j -v +${DAYS}d -f "%Y%m%d%H%M%S" "$DATETIME" +"%Y%m%d"`000000" && DEFAULT_DURATION=1439
[[ $HOURS ]] && DATETIME="`date -j -v +${HOURS}H -f "%Y%m%d%H%M%S" "$DATETIME" +"%Y%m%d%H"`0000" && DEFAULT_DURATION=60
[[ $MINUTES ]] && DATETIME="`date -j -v +${MINUTES}M -f "%Y%m%d%H%M%S" "$DATETIME" +"%Y%m%d%H%M"`00" && DEFAULT_DURATION=30
[[ $SECONDS ]] && DATETIME="`date -j -v +${SECONDS}S -f "%Y%m%d%H%M%S" "$DATETIME" +"%Y%m%d%H%M%S"`" && DEFAULT_DURATION=3
: ${DURATION:=$DEFAULT_DURATION}

START_SECONDS=`date -jf "%Y%m%d%H%M%S" $DATETIME +"%s"`
END_SECONDS=$((START_SECONDS+DURATION*60))

# show prompt to specify the calendar to be used
[[ $CAL_NUM ]] || {
  echo '
var app = Application("Calendar");
if (!app.running()) app.activate();
for (var i = 0; i < app.calendars.length; i++) console.log(i,app.calendars[i].name());
' | osascript -l JavaScript
  echo -n "which would you like to use? [Numeber] > " && read CAL_NUM
  echo "
###################################
# You can specify the number of the calendar with '-c $CAL_NUM' next time.
# Please see help with -h for the detail.
###################################"
}

echo -n "
the following will be added to the calendar

title      : $TITLE
startDate  : `date -jf "%s" $START_SECONDS`
endDate    : `date -jf "%s" $END_SECONDS`
calNumber  : $CAL_NUM
setAlarm   : $SET_ALARM
minToAlerm : $INTERVAL (`echo -n $INTERVAL | tr -d -` minutes `if [[ $INTERVAL -lt 0 ]]; then echo -n before; else echo -n after; fi` the startDate)

are you sure? [Y/n] > " && read ans && [[ $ans == [Nn] ]] && abort "start over"

# execute apple script
echo "
var title        = '$TITLE';
var startSeconds = $START_SECONDS;
var endSeconds   = $END_SECONDS;
var calNumber    = $CAL_NUM
var setAlarm     = $SET_ALARM
var minToAlerm   = $INTERVAL

var app = Application('Calendar');
if (!app.running()) app.activate();

var startDate = new Date(startSeconds*1000);
var endDate   = new Date(endSeconds*1000);
var summary   = title;
var cal       = app.calendars[calNumber];
var event1    = app.Event({
  startDate: startDate,
  endDate  : endDate,
  summary  : summary
});
cal.events.push(event1);
if (setAlarm) event1.displayAlarms.push(app.DisplayAlarm({triggerInterval:minToAlerm}));
'finished!'
" | osascript -l JavaScript