dotfiles/.local/bin/statusbar/sb-battery

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#!/bin/sh
# Prints all batteries, their percentage remaining and an emoji corresponding
# to charge status (🔌 for plugged up, 🔋 for discharging on battery, etc.).
case $BLOCK_BUTTON in
3) notify-send "🔋 Battery module" "🔋: discharging
🛑: not charging
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🔄;: stagnant charge
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🔌: charging
⚡: charged
❗: battery very low!" ;;
esac
# Loop through all attached batteries.
for battery in /sys/class/power_supply/BAT?
do
# Get its remaining capacity and charge status.
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capacity=$(cat "$battery"/capacity 2>/dev/null)
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if [ -n "$capacity" ]; then
#do not print misreads
[ "$capacity" -gt 100 ] &&
echo "Error. Capacity:$capacity" > /dev/stderr &&
continue
# do not display full batteries (nice to unclutter status bars for laptops mostly used stationiary)
[ "$capacity" -eq 100 ] &&
printf '\n' &&
continue
status=$(sed "s/Discharging//;s/Not charging/🛑/;s/Charging/🔌/;s/Unknown/🔋/;s/Full/⚡/" "$battery"/status)
# Center picture around the actual capacity.
# Displayable capacities: 0, 1/4, 1/2, 3/4, 1 -> intervall of length 25% centered around displaycategory
# -> +- 12.5% for every level
if [ "$status" = "" ]; then
[ "$capacity" -le 13 ] &&
status=""
[ "$capacity" -le 37 ] &&
status=""
[ "$capacity" -le 63 ] &&
status=""
[ "$capacity" -le 87 ] &&
status=""
fi
printf "%s\n" "$status"
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else
echo "Error. Capacity:$capacity" > /dev/stderr #if battery fails during reading, quit
fi
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done | sed 's/ *$//'