battery block for i3blocks

battery.sh

#!/bin/bash

main() {
    local ac=$(cat /sys/class/power_supply/AC/online)

    if [[ -d /sys/class/power_supply/BAT0 ]] ; then
        local int_present=$(cat /sys/class/power_supply/BAT0/present)
        local int_capacity=$(cat /sys/class/power_supply/BAT0/capacity)
        local int_status=$(cat /sys/class/power_supply/BAT0/status)
    else
        local int_present=0
        local int_capacity=0
    fi

    if [[ -d /sys/class/power_supply/BAT1 ]] ; then
        local ext_present=$(cat /sys/class/power_supply/BAT1/present)
        local ext_capacity=$(cat /sys/class/power_supply/BAT1/capacity)
        local ext_status=$(cat /sys/class/power_supply/BAT1/status)
    else
        local ext_present=0
        local ext_capacity=0
    fi

    local longline=""
    local shortline=""
    local colorline=""
    local exitstate=0

    # write charging or battery symbol
    if [[ "${ac}" == "1" ]] ; then
        longline="${longline} "
    else
        longline="${longline}☃ "
    fi

    # show state of internat battery if present
    if [[ "$int_present" == "1" ]] ; then
        longline="${longline}INT: ${int_capacity}%"
        shortline="${shortline}${int_capacity}%"
    fi

    # add seperator if needed
    if [[ "$int_present" == "1" && "$ext_present" == "1" ]] ; then
        longline="${longline} "
        shortline="${shortline} / "
    fi

    # show state of internat battery if present
    if [[ "$ext_present" == "1" ]] ; then
        longline="${longline}EXT: ${ext_capacity}%"
        shortline="${shortline}${int_capacity}%"
    fi

    # set color
    local cap=$((int_capacity + ext_capacity))
    if [[ "${ac}" == "1" ]] ; then
        if [[ $int_present == 1 && $ext_present == 1 ]] ; then
            if [[ $cap -gt 196 ]] ; then
                colorline="#00ff00"
            else
                colorline="#ff9900"
            fi
        else
            if [[ $cap -gt 98 ]] ; then
                colorline="#00ff00"
            else
                colorline="#ff9900"
            fi
        fi
    else
        if [[ $cap -lt 15 ]] ; then
            colorline="#ff0000"
            # set urgent state
            exitstate=33
        else
            colorline="#ffff00"
        fi
    fi

    echo "${longline}"
    echo "${shortline}"
    echo "${colorline}"
    exit $exitstate
}
main