Powershell 2.0 compatibility

[rattuscz]

Initial try to bring script to PS 2.0 compatible version - as our ADFS 2.0 are also PS2.0 😢

Analytics part still does not work - ConvertFrom-Json not in ps2

Not sure if this PS2.0 compatibility is even desirable in main branch, maybe as a separate?
Anyway looking for feedback

[msftclas]

All CLA requirements met.

[bongiovimatthew-microsoft]

@rattuscz, this looks like a fantastic start on the PS 2.0 compat. To handle the lack of ConvertFrom-Json, you might have to construct PowerShell objects to correspond to the template that we use.

I also think you have a good point about the PS 2.0 compat code not making sense in the master branch. One downside to having a dedicated sub-branch is that it will have to be periodically updated with the latest changes going into master. It might make sense for you to maintain a forked project, which we can call out in the documentation on our project. That would mean you would be the owner, and could manage the merging of any updates.

[rattuscz]

@bongiovimatthew-microsoft I'm right in the middle of switching places inside company so in one-two months I probably won't even have access to any servers with ADFS to test it on. That would probably make me a very poor owner 🙁

I will be happy to finish with replacing the json templates and any other problem I find to finish this PR as working PS2 version.

Also the line foreach ( $Event in $Result | Where { $null -ne $_ } ) - I'm not sure this is PS2 only problem, as $Result is @() + Get-WinEvent call that can lead to @() + $null which is array with null inside -> causes errors inside the foreach loop when not checked.

[bongiovimatthew-microsoft]

Thanks @rattuscz, I created a new branch for the PS 2.0 compat called PS2.0-Compat. If you wouldn't mind switching this PR over to that branch, that would be great.

Also, for the loop over $Result, you're right that it could be an array with $null inside, and that doesn't seem to be just a PS2 problem. Would you mind adding that one-line fix into your other open PR?

[rattuscz]

I've had some other pressing issues so I will get to it next week.

I will create separate PR for the $null filter.

Also have to chase someone to get the CLA approval :/

[rattuscz]

ok separate PR for the $null done, branch switched to PS2.0-Compat