Convert Invoke-RestMethod output to object - rest

Question

I'm trying to use PowerShell Invoke-RestMethod on a ticketing system's API and then convert the output into a PowerShell object.
As an example when I use Invoke-RestMethod to get the properties of a ticket I get this.
$object = Invoke-RestMethod '[URI here]'
$object.GetType()
IsPublic IsSerial Name BaseType
-------- -------- ---- --------
True True String System.Object
$object
EWREST_supported_user0='Yes';
EWREST_updater_team='Support Team';
EWREST_eng_id='CLT';
EWREST_testlabelsub='Test Label';
EWREST_time_created='17:21:03';
EWREST_cr_conversion_related_to='Support Case';
EWREST__1901_full_name='secuser Testuser1';
EWREST_summary='Ticket Title';
EWREST_i_would_like_to_reopen_my_ticket='No';
EWREST_assigned_team_leader='Agiloft Admin';
EWREST_id='183255';
EWREST_severity='Sev 4';
EWREST_problem_description='<div>This is an example of a ticket note that takes up multiple lines when read via API<\/div><div> <\/div><div>Example note info here<\/div><div> <\/div>
<div>Additional example note info here<\/div><div> <\/div><div>Even more note info here<\/div>';
EWREST_demo_data='No';
What I would like to be able to do is manipulate $object as an object by doing things like $object.EWREST_category and get "Networking". So I have been trying to figure out how to maniuplate $object which is just a string of attributes to a traditional PowerShell object with properties.
Can someone offer some pointers on how to go about that?

Answer 1

Since you already have a string with key/value pairs I'd just do a little cleanup (remove the single quotes and the semicolons), convert the string to a hashtable, then build a custom object from that:
$response = Invoke-RestMethod '[URI here]'
$props = $response -replace "'" -replace ';' | ConvertFrom-StringData
$object = New-Object -Type PSObject -Property $props
Edit: To mangle the multiline value into one line you can use another replacement with a negative lookbehind assertion ((?<!...)) that removes newlines only if they're not preceded by a single quote followed by a semicolon. However, since that same property contains other semicolons you also need to modify the semicolon replacement, so that it only removes semicolons if they're followed by a newline or the end of the string (using a positive lookahead assertion, (?=...)).
$props = $response -replace "(?<!';)`n" -replace "'" -replace ";(?=`n|`$)" |
ConvertFrom-StringData

Answer 2

Maybe next naive script could suffice?
$ob= "EWREST_supported_user0='Yes';
EWREST_category='Networking';
EWREST_updater_team='Admin Team';
EWREST_time_created='12:56:53';
EWREST_cr_conversion_related_to='Support Case';
" # this is that string
# transform string to an array:
$oba = $ob.Split("`r`n", [System.StringSplitOptions]::RemoveEmptyEntries)
$obah=#{} # create empty hash table
# and fill it from array then:
$oba | ForEach-Object {
$aux=$_.split('=;') # key / value pair
$obah[$aux[0]] = $aux[1] } # hash[key] = value
$obah.Keys # display hash table keys (only debug)
$obah.EWREST_time_created # hash table item use (example: property)
$obah['EWREST_category'] # hash table item use (another approach: index)