Correct way to parse the file with named captures

Question

Hello!
I'm trying to build the configuration parser script, as I'm new on powershel /regex I have a lot of questions.
I have the following source file:
add chain=input comment=Accept dst-port=53 protocol=udp src-address-list=DNS_servers
add chain=input comment=AcceptDNSqueries dst-port=53 protocol=udp src-address-list=Servers
add chain=input comment=AcceptDNS dst-port=53 protocol=tcp src-address-list=DNS_servers
add chain=input comment=DHCP_relay dst-address-list=DHCP dst-port=67,68 protocol=udp src-address-list=IntIp
The following result should be done (results as csv format, the captures with no value are divided by seperator):
Chain,Comment,dst-port,protocol,src-address-list,dst-address-list
input,Accept,53,udp,DNS_servers,,
input,AcceptDNSqueries,53,udp,,Servers
input,Acceptudp,,udp,,Servers
According the following
link we can use the named captures. I have played with it and noticed that this script works only when data is at predefined order (or by using a lot of or expressions by repeating them when needed).
Question: how to parse the file when it's possible to use various captures with data located on different order(some values at configuration file is missing)? Is it possible to modify the script on link or we need to work with different approach?
Thanks!

Answer 1

Try this:
$text =
add chain=input comment=Accept dst-port=53 protocol=udp src-address-list=DNS_servers
add chain=input comment=AcceptDNSqueries dst-port=53 protocol=udp src-address-list=Servers
add chain=input comment=AcceptDNS dst-port=53 protocol=tcp src-address-list=DNS_servers
add chain=input comment=DHCP_relay dst-address-list=DHCP dst-port=67,68 protocol=udp src-address-list=IntI
'@ | set-content sourcefile.txt
get-content sourcefile.txt |
foreach {
new-object PSObject -Property $($_ -replace '^add ' -replace ' ',"`n" | convertfrom-stringdata) |
select Chain,Comment,dst-port,protocol,src-address-list,dst-address-list
} | ft -auto
chain comment          dst-port protocol src-address-list dst-address-list
input Accept           53       udp      DNS_servers                      
input AcceptDNSqueries 53       udp      Servers                          
input AcceptDNS        53       tcp      DNS_servers                      
input DHCP_relay       67,68    udp      IntI             DHCP            
I know, it's not "named captures", but those key=value pairs just beg to be run through convertfrom-stringdata.
Edit: just noticed I missed the dst-address-list.  Fixed.
[string](0..33|%{[char][int](46+("686552495351636652556262185355647068516270555358646562655775 0645570").substring(($_*2),2))})-replace " "