ultraman low battery

battery_alert.sh

#!/bin/bash

low_battery_percent=20
low_remaining_minute=5         # max is 60
low_battery_sound_file="~/bin/ultramanCTSE.mp3"
full_battery_sound_file="~/bin/full_battery.wav"
max_sound_length_in_second=10  # max is 60

# Dependencies & Troubleshooting: https://superuser.com/a/308441/943615

# suara macet setelah 1 detik kalo ga pake ini, notify-send jg ngga jalan
# khusus ubuntu? btw bisa lewat cron file (crontab -e)
# https://stackoverflow.com/a/53598510/9157799
# export XDG_RUNTIME_DIR="/run/user/$uid"

max_capacity=`acpi -i | awk 'END{print $NF}'`

# use nested square brackets for string
if [[ `acpi -b | awk ' {print $3}'`  == "Discharging," ]]
then
	battery=`acpi -b | awk '{print $4-0}'`
	remaining_time=`acpi -b | awk '{print $5}'`
	hour=`echo $remaining_time | awk -F ":" '{print $1-0}'`
	minute=`echo $remaining_time | awk -F ":" '{print $2-0}'`

	if [ $battery -le $low_battery_percent ] || [ $hour -eq 0 ] && [ $minute -lt $low_remaining_minute ]
	then
		notify-send "battery is low: $battery%" "battery health: $max_capacity\n$remaining_time remaining"
		play "$low_battery_sound_file" trim 0 $max_sound_length_in_second
	fi
else
	if [ `acpi -b | awk ' { print ($5)-0}'`  -eq 100 ]
	then
		notify-send "battery is full" "battery health: $max_capacity"
		play "$full_battery_sound_file" trim 0 $max_sound_length_in_second
	fi
fi

crontab

# non ubuntu
# * * * * * ~/bin/battery_alert.sh

# https://crontab.guru/
* * * * * XDG_RUNTIME_DIR=/run/user/$(id -u) ~/bin/battery_alert.sh

acpi is deprecated. Find an alternative here and here.