bash proxy checker 2

#! /bin/bash
# $PROG: All type proxies checker, default proxy type is "socks5" if no argument given
# long running period due to big proxies list, be patient.

usage="${0##*/} [socks5|socks4|http|https]"
list="https://raw.githubusercontent.com/jetkai/proxy-list/main/online-proxies/json/proxies.json"
check="https://ipwho.is"
arg=$1
: ${arg:=socks5}
OIFS=$IFS
IFS='
'
case "$arg" in
        socks5) proxy=($(curl -s "$list" | jq -r '.socks5' | tr -d '[ ]",')) ;;
        socks4) proxy=($(curl -s "$list" | jq -r '.socks4' | tr -d '[ ]",')) ;;
        http) proxy=($(curl -s "$list" | jq -r '.http' | tr -d '[ ]",')) ;;
        https) proxy=($(curl -s "$list" | jq -r '.https' | tr -d '[ ]",')) ;;
        *) echo "$usage" >&2 ; exit 5 ;;
esac

count="${#proxy[@]}"
min=0
max=$((count - 1))
while (( min <= max ))  ; do
        ip="${proxy[$min]//:*}"
        port="${proxy[$min]//*:}"
        if ping -c3 "$ip" &> /dev/null ; then
                info=$(curl -x "$arg://${proxy[$min]}" --connect-timeout 10 -s "$check" | jq -r -c '.country,.region')
                if [ -n "$info" ] ; then
                        echo "Worked $arg proxy"
                        echo "IP: $ip"
                        echo "PORT: $port"
                        echo "Location: $info"
                        echo ""
                fi
        fi
        (( min++ ))
done

unset IFS
IFS=$OIFS
exit 0