#!/usr/bin/env bash

usage() {
    echo "$0 [-h] [-i <iso image>]"
    echo ""
    echo "Options:"
    echo "  -i: StarlingX ISO image"
    echo ""
}

iso_image_check() {
    local ISOIMAGE=$1
    FILETYPE=$(file --mime-type -b ${ISOIMAGE})
    if ([ "$FILETYPE" != "application/x-iso9660-image" ]); then
        echo "$ISOIMAGE is not an application/x-iso9660-image type"
        exit -1
    fi
}

# delete a node's disk file in a safe way
delete_disk() {
    local fpath="$1"

    if [ ! -f "$fpath" ]; then
        echo "file to delete is not a regular file: $fpath" >&2
        return 1
    fi

    file -b "$fpath" | grep -q "^QEMU QCOW Image (v3),"
    if [ $? -ne 0 ]; then
        echo "file to delete is not QEMU QCOW Image (v3): $fpath" >&2
        return 1
    fi

    sudo rm "$fpath"
}

# delete an xml file in a safe way
delete_xml() {
    local fpath="$1"

    if [ ! -f "$fpath" ]; then
        echo "file to delete is not a regular file: $fpath" >&2
        return 1
    fi

    file -b "$fpath" | grep -q "^ASCII text$"
    if [ $? -ne 0 ]; then
        echo "file to delete is not ASCII text: $fpath" >&2
        return 1
    fi

    sudo rm "$fpath"
}