#!/usr/bin/env bash

version="0.1"

function usage()
{
    echo "Usage :  $0 [options] [<idVendor>:]<idProduct>

    Reset usb device identified by idVendor:idProduct.

    Options:
    -h,--help       Display this message
    -v,--version    Display script version"
}

function check_ids()
{
    local syspath=$1
    [[ -n $idVendor && "$idVendor" != $(cat $syspath/idVendor 2>/dev/null) ]] && return 1
    [[ -n $idProduct && "$idProduct" != $(cat $syspath/idProduct 2>/dev/null) ]] && return 1
    return 0
}

function main()
{
    for syspath in /sys/bus/usb/devices/*; do
        if ! check_ids $syspath; then
            continue
        fi

        echo "Resetting '$syspath'"
        echo 0 | sudo tee $syspath/authorized >/dev/null
        echo 1 | sudo tee $syspath/authorized >/dev/null
    done
}

# Parse arguments
declare -a args
while [[ $# -gt 0 ]]; do
    opt="$1"

    case $opt in
        -h|--help)     usage; exit 0 ;;
        -v|--version)  echo "$0 -- Version $version"; exit 0 ;;
        -* )
            echo -e "\n  Option does not exist : $opt\n"
            usage; exit 1 ;;

        *) args+=("$opt"); shift ;;
    esac
done

if [[ ${#args[@]} != 1 ]]; then
    usage
    exit 1
fi

if [[ ${args[0]} =~ ([^:]+):([^:]+) ]]; then
    idVendor=${BASH_REMATCH[1]}
    idProduct=${BASH_REMATCH[2]}
else
    idProduct=${args[0]}
fi

sudo -v
main