dl

#!/bin/bash

for dep in axel cut bc bash tput
do command -v "$dep" >/dev/null 2>&1 || { echo "dependency $dep not found. please make the command available in the PATH by installing it/changing the path/moving the binary to a place in the path."; exit 255; }
done

trap "tput cnorm; exit 130" SIGINT

function syntax {
    exit="$1"
    [[ "$1" == '' ]] && exit=1
    echo -e "usage: $0 [-h] [-q] [-a opts] url\n"\
        "-h      : display this\n"\
        "-q      : dont show axel output except progress bar\n"\
        "        : (if you dont want the progress bar, call axel, not me.)\n"\
        "-a opts : pass arguments directly to axel.\n"\
        "-o file : saves output to file\n"\
        "-H      : show axel help page\n"\
        "-i      : show download speed"\
        "-d      : use axels download bar but filter out extra lines (auto-uses -q) (disabled)"

    exit "$exit"
}

default=false
quiet=false
info=false
while getopts ":Hhqa:o:id" arg;do
    case $arg in
        h ) syntax 0;;
        q ) quiet=true;;
        a ) opts="$OPTARG";;
        o ) outfile="-o '$OPTARG'";;
        H ) axel --help; exit 0;;
        d ) default=true; quiet=true ;;
        i ) info=true;;
        * ) syntax 1
    esac
done
shift $((OPTIND-1))

if [[ "$1" == "--" ]]; then url="$2"; else url="$1"; fi

if [[ "$url" == '' ]]
then syntax 1
fi

# outfile="-o '${outfile[-1]}'"

# # echo "url: $url; quiet: $quiet; help: $help"
# # echo "axel opts: '$opts'"

tput civis
opts="${opts[*]}"
eval "axel $opts $outfile $url" 2>&1 | {
    while read -r line; do
        pers="$(echo "$line" | cut -d ']' -f '1' -s | cut -c '3-4')"
        # echo "$line:::$pers"
        #[[ "$line" == "[  0%] "*" ["*"KB/s]"* ]] && pers="0"
        pers="${pers// /}"
        if [[ "$pers" =~ ^[0-9]+$ ]] && ! $default
        then [[ "$pers" == 00 ]] && pers=100
            dispers="[$pers%] "
            cols=$(($(tput cols)-${#dispers}-2))
            $info && {
                infoline="$(echo "$line" | cut -d '[' -f '3,4' -s)"
                # infoline="${infoline// /}"
                infoline=" [${infoline}"
                cols=$((cols-${#infoline}))
            }
            # eval "printf ' %.0s' {1..$(($(tput cols)-1))}" && echo -ne '\r'
            # echo -n "$dispers"
            out="$dispers"
            ch="$(echo "$cols*($pers/100)" | bc -l | cut -d . -f 1)"
            # echo "$cols="
            # echo "$ch-"
            # echo "$(($cols-$ch-1))"
            # out="$out$(eval "printf '\e[0;32m#%.0s\e[0m' {1..$ch}")"
            out="$out$(eval "printf '#%.0s' {1..$ch}")"
            out="$out$(eval "printf '=%.0s' {1..$(($cols-$ch))}")"
            # $info && echo -n "$infoline"
            $info && out="$out$infoline"
            echo -ne "${out}"
            # eval "printf '*%.0s' {1..$(($(tput cols)-${#out}-1))}"
            echo -ne "\r"
        # elif [[ "$line" == "Initializing download: "* ]]
        # then echo "axel is now downloading $(cut -d ':' -f '2' <<< "$line")"
        elif [[ "$line" == "["*"%] "*" ["*"KB/s]"* ]] || [[ "$line" == *"."*"["*"KB/s]"* ]]
        then
            if $default
            then echo -ne "\r$line"
            fi
        elif [[ "$line" == '' ]]
        then :
        else $quiet || { eval "printf ' %.0s' {1..$(($(tput cols)-1))}"; echo -e "\raxel: $line" ;}
        fi
    done
} 
tput cnorm
echo ''