#!/bin/bash
# info: list system interfaces
# options: [FORMAT]
#
# The function for obtaining the list of network interfaces.


#----------------------------------------------------------#
#                    Variable&Function                     #
#----------------------------------------------------------#

# Argument defenition
format=${1-shell}

# Includes
source $VESTA/func/main.sh

# Json function
json_list_iface() {
    dev=$(cat /proc/net/dev |grep : |cut -f 1 -d : |tr -d ' ' |grep -v lo)
    int_counter=$(echo "$dev" | wc -l)
    i=1
    echo '['
    for interface in $dev; do
        if [ "$i" -lt "$int_counter" ]; then
            echo -e  "\t\"$interface\","
        else
            echo -e  "\t\"$interface\""
        fi
        (( ++i))
    done
    echo "]"
}

# Shell function
shell_list_iface() {
    dev=$(cat /proc/net/dev |grep : |cut -f 1 -d : |tr -d ' ' |grep -v lo)
    if [ -z "$nohead" ]; then
        echo "INTERFACES"
        echo "----------"
    fi
    for interface in $dev; do
        echo "$interface"
    done
}


#----------------------------------------------------------#
#                       Action                             #
#----------------------------------------------------------#

# Listing domains
case $format in 
    json)   json_list_iface ;;
    plain)  nohead=1; shell_list_iface ;;
    shell)  shell_list_iface ;;
    *)      check_args '1' '0' '[FORMAT]' ;;
esac


#----------------------------------------------------------#
#                       Vesta                              #
#----------------------------------------------------------#

exit