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#!/bin/sh
# Send a notification if battery is low, change status in info file accordingly
notify_low () {
# Battery isn't much but is charging (don't notify)
[ "$status" = "Charging" ] && return
# Battery critically low
if [ "$capacity" -le 10 ] && ! grep -q critically-low "$lowinfo"; then
notify-send -i "$HOME/.config/icons/critical-battery.png" -u critical "Battery critically low!"
echo critically-low >"$lowinfo"
# Battery is low
elif [ "$capacity" -le 20 ] && ! grep -q low "$lowinfo"; then
notify-send -i "$HOME/.config/icons/low-battery.png" -t 5500 "Battery low!"
echo low >"$lowinfo"
fi
}
battery="/sys/class/power_supply/BAT0"
status="$(cat "$battery/status")"
capacity="$(cat "$battery/capacity")"
# Get the low battery status from file ~/.cache/battery-low-status
lowinfo="$HOME/.cache/battery-low-status"
[ ! -e "$lowinfo" ] && touch "$lowinfo"
case $1 in
left-click)
;;
*)
# Set charging icon and capacity icon
[ "$status" = "Charging" ] && charging_icon=" " || charging_icon=""
[ "$capacity" -gt 100 ] && capacity=100
if [ "$capacity" -lt 15 ]; then capacity_icon=' '
elif [ "$capacity" -lt 40 ]; then capacity_icon=' '
elif [ "$capacity" -lt 60 ]; then capacity_icon=' '
elif [ "$capacity" -lt 90 ]; then capacity_icon=' '
else capacity_icon=' '
fi
# Report low battery
[ "$capacity" -le 20 ] && notify_low
# Reset low battery information in these cases
{ [ "$capacity" -gt 20 ] || [ "$status" = "Charging" ]; } && [ -n "$(cat "$lowinfo")" ] && echo "" >"$lowinfo"
printf "%s%s%d%%\n" "$charging_icon" "$capacity_icon" "$capacity"
;;
esac
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