progbar

#!/bin/sh

vblocks=(' ' ▁ ▂ ▃ ▄ ▅ ▆ ▇ █)
blocks=(" " ▏ ▎ ▍ ▌ ▋ ▊ ▉ █)

graph() {
    local amount=$(( $1 * 1000 ))
    local max=$(( $2 ))

    local y=$((amount / max * 9 / 1000))
    
    if test "-v" = "$3"; then
        printf "${vblocks[$y]}"
    elif test "-vh" = "$3"; then
        for i in $(seq 1 $y); do
            printf "${vblocks[$i]}"
        done
    else
        charWidth="$3"
        if test -z "$charWidth"; then charWidth="$(tput cols)"; fi
        width=$(( charWidth * 9 ))
        steps=$((amount / max * width / 1000))
        chars=$((steps/9))
        lastBlock=$((steps%9))

        test $chars -gt 0 && printf "%$((chars))s" 'x' | sed 's/[x ]/▉/g'

        if test $lastBlock -gt 0; then
            printf "${blocks[$lastBlock]}"
            chars=$((chars + 1))
        fi

        printf "%$((charWidth - chars + 1))s" ']'
    fi
}

if test "-" = "$1"; then
    while read one two three; do
        if test -z "$two"; then two="$2"; fi
        if test -z "$three"; then three="$3"; fi
        graph "$one" "$two" "$three"
    done
else
    graph "$@"
fi