How to search and replace combined with if & else in powershell - powershell

Question

Every night I got a text file that needs to be edited manually.
The file contains approximately 250 rows. Three example of a rows:
112;20-21;32;20-21;24;0;2;248;271;3;3;;
69;1;4;173390;5;0;0;5460;5464;3;3;;
24;7;4;173390;227;0;0;0;0;3;3;;
I need to replace the two last values in each row.
All rows ending with ;0;3;3;; should be replaced with ;0;17;18;; (the last one, solved)
The logic for the other two:
If the row contain a '-' it should replace the two last values from ;3;3;; to ;21;21;;
If it don´t have a '-' it should replace the two last values from ;3;3;; to ;22;22;;
This is my script
foreach ($file in Get-ChildItem *.*)
{
(Get-Content $file) -replace ';0;3;3;;',';;0;17;18;;' -replace ';3;3;;',';21;21;;' |Out-file -encoding ASCII $file-new}
If I could add a '-' in the end of each row continga a '-' I could solve the issue with a modified script:
(Get-Content $file) -replace ';0;3;3;;',';;0;17;18;;' -replace ';3;3;;-',';22;22;;' -replace ';3;3;;',';21;21;;'|Out-file -encoding ASCII $file-new}`
But how do I add a '-' in the end of a row, if the row contain a '-'?
Best Regards
Mr DXF
I tried with select-string, but I can´t figure it out...
if select-string -pattern '-' {append-text '-'|out-file -encoding ascii $file-new
else end
}

Answer 1

The following might do the trick, it uses a switch with the -Regex flag to read your files and match lines with regular expressions.
foreach ($file in Get-ChildItem *.* -File) {
& {
switch -Regex -File $file.FullName {
# if the line ends with `;3;3;;` but is not preceded by `;0`
'(?<!;0);3;3;;$' {
# if it contains a `-`
if($_.Contains('-')) {
$_ -replace ';3;3;;$', ';21;21;;'
continue
}
# if it doesn't contain a `-`
$_ -replace ';3;3;;$', ';22;22;;'
continue
}
# if the line ends with `';0;3;3;;`
';0;3;3;;$' {
$_ -replace ';0;3;3;;$', ';0;17;18;;'
continue
}
# if none of the above conditions are matched,
# output as is
Default { $_ }
}
} | Set-Content "$($file.BaseName)-new$($file.Extension)" -Encoding ascii
}
Using the content example in question the end result would become:
112;20-21;32;20-21;24;0;2;248;271;21;21;;
69;1;4;173390;5;0;0;5460;5464;22;22;;
24;7;4;173390;227;0;0;0;0;17;18;;