statusbar

#!/bin/bash

interval=1
fgcol="#838383"
bgcol="#222222"
iconcol="#bfbfbf"
icondir=${HOME}/misc/icons
barheight=8

icon() {
    echo "^fg($iconcol)^i($icondir/$1)^fg()"
}

update_date() {
    current_date="^i($icondir/wclock.xpm) $(date +'%d/%m/%Y %H:%M:%S')"
}

update_battery() {
    local color="#aaaaaa"

    local full=$(</sys/class/power_supply/BAT0/charge_full)
    local remaining=$(</sys/class/power_supply/BAT0/charge_now)
    local percentage=$(($remaining * 100 / $full))
    local status=$(</sys/class/power_supply/BAT0/status)

    if [[ $percentage < $low ]]; then color="#ff4444"; fi

    if [[ "$status" == Discharging ]]; then
        local icon="power-bat2.xbm"
    else
        local icon="power-ac.xbm"
    fi

    battery_state="$(icon $icon) $(echo $percentage | gdbar -s o -h $barheight -w 50 -fg $color)"
}

last_rx=$(</sys/class/net/eth0/statistics/rx_bytes)
last_tx=$(</sys/class/net/eth0/statistics/tx_bytes)

update_net() {
    local rx=$(</sys/class/net/eth0/statistics/rx_bytes)
    local tx=$(</sys/class/net/eth0/statistics/tx_bytes)

    local rx_rate=$(( ($rx - $last_rx) / 1024 ))
    local tx_rate=$(( ($tx - $last_tx) / 1024 ))

    last_rx=$rx
    last_tx=$tx

    net_state="$(icon net-wired2.xbm) ^fg(green)^i($icondir/up.xbm) ^fg()$tx_rate kB/s ^fg(red)^i($icondir/down.xbm) ^fg()$rx_rate kB/s"
}

update_cpu() {
    local temp=$(</sys/class/thermal/thermal_zone0/temp)
    temp=$(( temp / 1000 ))
    cpu_state="$(icon cpu.xbm) $temp °C"
}

mail_tags=( inbox famille la-bande ensimag exherbo soulaks )
update_mail() {
    local tag
    local mails=""
    for tag in ${mail_tags[@]}; do
        local count=$(notmuch count tag:$tag and tag:unread)
        if [[ $count > 0 ]]; then
            mails="$mails $tag($count)"
        fi
    done
    if [[ -z $mails ]]; then mails="none"; fi
    mail_state="$(icon envelope.xbm) $mails"
}

while true; do
    update_date
    update_battery
    update_net
    update_cpu
    update_mail

    echo  $mail_state $cpu_state $net_state $battery_state $current_date
    sleep $interval
done | dzen2 -ta r -fg $fgcol -bg $bgcol -w 680 -x 1000 -fn "Terminus:pixelsize=14"