#!/bin/bash

validate_number () {
    local re="^[0-9]+$"
    if [[ ! $1 =~ $re ]] ; then
        return 1
    fi
    return 0
}

find_node () {
    if validate_number $1 ; then
        # input is a number, try to find if an OC node is defined
        oc_try="OC$1"
        node=${!oc_try}

        if [ -n "$node" ]; then
            # node lookup succeeded, return node
            echo $node
        else
            # node lookup failed, return original input
            echo $1
        fi
    else
        echo $1
    fi
    return 0
}