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#!/usr/bin/env bash
PID_PATH="$HOME/.cache/my-battery-watcher.pid";
[[ ! -f "$PID_PATH" ]] && touch $PID_PATH;
battery_component() { cat "/sys/class/power_supply/BAT0/$1"; }
get_level() { battery_component capacity; }
get_state() { battery_component status; }
LOW_BATTERY="30";
CRITICAL_BATTERY="10";
DELAY=1;
LOW_DELAY=240;
CRITICAL_DELAY=60;
oldpid=$(cat $PID_PATH);
cmd=${1:-"start"};
if [[ ! -z "$oldpid" ]] || [[ "$cmd" == "stop" ]]; then
kill $oldpid;
fi;
# :: Min -> Max -> Number -> Bool
between() { test "$3" -gt "$1" && test "$3" -le "$2"; }
if [[ "$cmd" == "start" ]]; then
while true; do
battery_level=$(get_level);
state=$(get_state);
if [[ "$state" == "Discharging" ]]; then
if (between $CRITICAL_BATTERY $LOW_BATTERY $battery_level); then
notify-send "Please charge this shit. Battery is at $battery_level%" -u normal;
sleep $LOW_DELAY;
fi
if (between 0 $CRITICAL_BATTERY $battery_level); then
notify-send "HOLY SHIT DUDE. I'M DYING. Battery is at $battery_level%" -u critical;
sleep $CRITICAL_DELAY;
fi
fi
sleep $DELAY;
done &
echo $! > $PID_PATH;
fi;
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