# Check ip ownership
is_ip_owner() {
    owner=$(grep 'OWNER=' $VESTA/data/ips/$ip |cut -f 2 -d \')
    if [ "$owner" != "$user" ]; then
        check_result $E_FORBIDEN "$ip is not owned by $user"
    fi
}

# Check if ip address is free
is_ip_free() {
    if [ -e "$VESTA/data/ips/$ip" ]; then
        check_result $E_EXISTS "$ip is already exists"
    fi
}

# Get full interface name
get_ip_iface() {
    i=$(/sbin/ip addr |grep -w $interface |\
         awk '{print $NF}' |tail -n 1 |cut -f 2 -d :)
    if [ "$i" = "$interface" ]; then
        n=0
    else
        n=$((i + 1))
    fi
    echo "$interface:$n"
}


# Check ip address specific value
is_ip_key_empty() {
    key="$1"
    string=$(cat $VESTA/data/ips/$ip)
    eval $string
    eval value="$key"
    if [ ! -z "$value" ] && [ "$value" != '0' ]; then
        key="$(echo $key|sed -e "s/\$U_//")"
        check_result $E_EXISTS "IP is in use / $key = $value"
    fi
}

# Update ip address value
update_ip_value() {
    key="$1"
    value="$2"
    conf="$VESTA/data/ips/$ip"
    str=$(cat $conf)
    eval $str
    c_key=$(echo "${key//$/}")
    eval old="${key}"
    old=$(echo "$old" | sed -e 's/\\/\\\\/g' -e 's/&/\\&/g' -e 's/\//\\\//g')
    new=$(echo "$value" | sed -e 's/\\/\\\\/g' -e 's/&/\\&/g' -e 's/\//\\\//g')
    sed -i "$str_number s/$c_key='${old//\*/\\*}'/$c_key='${new//\*/\\*}'/g"\
        $conf
}

# Get ip name
get_ip_alias() {
    ip_name=$(grep "NAME=" $VESTA/data/ips/$local_ip |cut -f 2 -d \')
    if [ ! -z "$ip_name" ]; then
        echo "${1//./-}.$ip_name"
    fi
}

# Increase ip value
increase_ip_value() {
    sip=${1-ip}
    USER=$user
    web_key='U_WEB_DOMAINS'
    usr_key='U_SYS_USERS'
    current_web=$(grep "$web_key=" $VESTA/data/ips/$sip |cut -f 2 -d \')
    current_usr=$(grep "$usr_key=" $VESTA/data/ips/$sip |cut -f 2 -d \')
    if [ -z "$current_web" ]; then
        echo "Error: Parsing error"
        log_event "$E_PARSING" "$ARGUMENTS"
        exit $E_PARSING
    fi
    new_web=$((current_web + 1))
    if [ -z "$current_usr" ]; then
        new_usr="$USER"
    else
        check_usr=$(echo -e "${current_usr//,/\n}" |grep -w $USER)
        if [ -z "$check_usr" ]; then
            new_usr="$current_usr,$USER"
        else
            new_usr="$current_usr"
        fi
    fi

    sed -i "s/$web_key='$current_web'/$web_key='$new_web'/g" \
        $VESTA/data/ips/$sip
    sed -i "s/$usr_key='$current_usr'/$usr_key='$new_usr'/g" \
        $VESTA/data/ips/$sip
}

# Decrease ip value
decrease_ip_value() {
    sip=${1-ip}
    USER=$user
    web_key='U_WEB_DOMAINS'
    usr_key='U_SYS_USERS'

    current_web=$(grep "$web_key=" $VESTA/data/ips/$sip |cut -f 2 -d \')
    current_usr=$(grep "$usr_key=" $VESTA/data/ips/$sip |cut -f 2 -d \')

    if [ -z "$current_web" ]; then
        check_result $E_PARSING "Parsing error"
    fi

    new_web=$((current_web - 1))
    check_ip=$(grep $sip $USER_DATA/web.conf |wc -l)
    if [ "$check_ip" -lt 2 ]; then
        new_usr=$(echo "$current_usr" |\
            sed "s/,/\n/g"|\
            sed "s/^$user$//g"|\
            sed "/^$/d"|\
            sed ':a;N;$!ba;s/\n/,/g')
    else
        new_usr="$current_usr"
    fi

    sed -i "s/$web_key='$current_web'/$web_key='$new_web'/g" \
        $VESTA/data/ips/$sip
    sed -i "s/$usr_key='$current_usr'/$usr_key='$new_usr'/g" \
        $VESTA/data/ips/$sip
}

# Get ip address value
get_ip_value() {
    key="$1"
    string=$(cat $VESTA/data/ips/$ip)
    eval $string
    eval value="$key"
    echo "$value"
}


# Get real ip address
get_real_ip() {
    if [ -e "$VESTA/data/ips/$1" ]; then
        echo $1
    else
        nat=$(grep -H "^NAT='$1'" $VESTA/data/ips/*)
        if [ ! -z "$nat" ]; then
            echo "$nat" |cut -f 1 -d : |cut -f 7 -d / |head -n 1
        fi
    fi
}

# Convert CIDR to netmask
convert_cidr() {
    set -- $(( 5 - ($1 / 8) )) 255 255 255 255 \
        $(((255 << (8 - ($1 % 8))) & 255 )) 0 0 0
    if [[ $1 -gt 1 ]]; then
        shift $1
    else
        shift
    fi
    echo ${1-0}.${2-0}.${3-0}.${4-0}
}

# Convert netmask to CIDR
convert_netmask() {
    nbits=0
    IFS=.
    for dec in $1 ; do
        case $dec in
            255) let nbits+=8;;
            254) let nbits+=7;;
            252) let nbits+=6;;
            248) let nbits+=5;;
            240) let nbits+=4;;
            224) let nbits+=3;;
            192) let nbits+=2;;
            128) let nbits+=1;;
            0);;
        esac
    done
    echo "$nbits"
}

# Calculate broadcast address
get_broadcast() {
    OLD_IFS=$IFS
    IFS=.
    typeset -a I=($1)
    typeset -a N=($2)
    IFS=$OLD_IFS

    echo "$((${I[0]} |\
        (255 ^ ${N[0]}))).$((${I[1]} |\
        (255 ^ ${N[1]}))).$((${I[2]} |\
        (255 ^ ${N[2]}))).$((${I[3]} |\
        (255 ^ ${N[3]})))"
}

# Get user ips
get_user_ips() {
    dedicated=$(grep -H "OWNER='$user'" $VESTA/data/ips/*)
    dedicated=$(echo "$dedicated" |cut -f 1 -d : |sed 's=.*/==')
    shared=$(grep -H -A1 "OWNER='admin'" $VESTA/data/ips/* |grep shared)
    shared=$(echo "$shared" |cut -f 1 -d : |sed 's=.*/==' |cut -f 1 -d \-)
    for dedicated_ip in $dedicated; do
        shared=$(echo "$shared" |grep -v $dedicated_ip)
    done
    echo -e "$dedicated\n$shared" |sed "/^$/d"
}

# Get user ip
get_user_ip() {
    ip=$(get_user_ips |head -n1)
    if [ -z "$ip" ]; then
        check_result $E_NOTEXIST "no IP is available"
    fi
    local_ip=$ip
    nat=$(grep "^NAT" $VESTA/data/ips/$ip |cut -f 2 -d \')
    if [ ! -z "$nat" ]; then
        ip=$nat
    fi
}

# Validate ip address
is_ip_valid() {
    local_ip="$1"
    if [ ! -e "$VESTA/data/ips/$1" ]; then
        nat=$(grep -H "^NAT='$1'" $VESTA/data/ips/*)
        if [ -z "$nat" ]; then
            check_result $E_NOTEXIST "IP $1 doesn't exist"
        else
            nat=$(echo "$nat" |cut -f1 -d: |cut -f7 -d/)
            local_ip=$nat
        fi
    fi
    if [ ! -z $2 ]; then
        if [ -z "$nat" ]; then
            ip_data=$(cat $VESTA/data/ips/$1)
        else
            ip_data=$(cat $VESTA/data/ips/$nat)
        fi
        ip_owner=$(echo "$ip_data" |grep OWNER= |cut -f2 -d \')
        ip_status=$(echo "$ip_data" |grep STATUS= |cut -f2 -d \')
        if [ "$ip_owner" != "$user" ] && [ "$ip_status" = 'dedicated' ]; then
            check_result $E_FORBIDEN "$user user can't use IP $1"
        fi
        get_user_owner
        if [ "$ip_owner" != "$user" ] && [ "$ip_owner" != "$owner" ]; then
            check_result $E_FORBIDEN "$user user can't use IP $1"
        fi
    fi
}