#!/bin/sh

# Prints all batteries, their percentage remaining and an emoji corresponding
# to charge status (🔌 for plugged up, 🔋 for discharging on battery, etc.).

case $BLOCK_BUTTON in
    3) notify-send "🔋 Battery module" "🔋: discharging
🛑: not charging
🔄;: stagnant charge
🔌: charging
⚡: charged
❗: battery very low!" ;;
esac

# Loop through all attached batteries.
for battery in /sys/class/power_supply/BAT?
do
	# Get its remaining capacity and charge status.
	capacity=$(cat "$battery"/capacity 2>/dev/null)
	[ -n "$capacity" ] && [ "$capacity" -gt 100 ] && continue 	#do not print misreads
	[ -z "$capacity" ] && continue 		#if battery fails during reading, quit
	status=$(sed "s/Discharging/🔋/;s/Not charging/🛑/;s/Charging/🔌/;s/Unknown/🔋/;s/Full/⚡/" "$battery"/status)
	# If it is discharging and 25% or less, we will add a ❗ as a warning.
	[ "$capacity" -le 25 ] && [ "$status" = "🔋" ] && warn="❗"
	printf "%s%s%s%%\n" "$status" "$warn" "$capacity"
	unset warn
done | sed 's/ *$//'