dunstdate

#!/bin/sh

# based on https://github.com/chebro/calendar-notification/
# added support for multiple months

get_month() {
	if [ $1 -ge 0 ]; then
        text=$(cal -m "+$1 months")
	else
        text=$(cal -m "$((-$1)) months ago")
	fi
	today=$(date '+%e')
    todaystyle="<b><span background='#fff' color='#285577'>$today</span></b>"
	month=$(echo "$text" | head -n1)
	heads=$(echo "$text" | head -n2 | tail -n1)
	days=$(echo "$text" | tail -n6 | sed "s; $today; $todaystyle;"\
                                   | sed "s;$today ;$todaystyle ;")

    [ $1 -eq 0 ] && month="<u>$month</u>"
    printf "%s\n%s\n%s\n" "<b>$month</b>" "<i>$heads</i>" "$days"
}

handle_action() {
	echo $DIFF > "$TMP"

    # for i in $(seq -2 2); do
    #     months="$months\n$(get_month $((DIFF+i)))"
    # done

    months=$(printf "%s\n" \
             "$(get_month $((DIFF-2)))"\
             "$(get_month $((DIFF-1)))"\
             "$(get_month $((DIFF+0)))"\
             "$(get_month $((DIFF+1)))"\
             "$(get_month $((DIFF+2)))")
	footnote="<i>        ~ calendar</i> 󰸗 "

	dunstify -a "dunstdate" "" "${months}\n${footnote}"
}

TMP=${XDG_RUNTIME_DIR:-/tmp}/calendar_notification_month
touch "$TMP"

read -r DIFF < "$TMP"
# DIFF=$(<"$TMP")

case $1 in
	"curr") DIFF=0;;
	"next") DIFF=$((DIFF+1));;
	"prev") DIFF=$((DIFF-1));;
esac

handle_action