Validate JSON before parsing config in Invoke-ListExtensionsConfig

Added a check using Test-Json to ensure the config is valid JSON before attempting to parse it. This prevents errors when the config is not in JSON format and returns an empty object if validation fails.

Author: JohnDuprey

Modules/CIPPCore/Public/Entrypoints/Invoke-ListExtensionsConfig.ps1

@@ -1,4 +1,4 @@
-Function Invoke-ListExtensionsConfig {
+function Invoke-ListExtensionsConfig {
     <#
     .FUNCTIONALITY
         Entrypoint,AnyTenant
@@ -9,27 +9,32 @@ Function Invoke-ListExtensionsConfig {
     param($Request, $TriggerMetadata)
     $Table = Get-CIPPTable -TableName Extensionsconfig
     try {
-        $Body = (Get-CIPPAzDataTableEntity @Table).config | ConvertFrom-Json -Depth 10 -ErrorAction Stop
-        if ($Body.HaloPSA.TicketType -and !$Body.HaloPSA.TicketType.value) {
-            # translate ticket type to autocomplete format
-            Write-Information "Ticket Type: $($Body.HaloPSA.TicketType)"
-            $Types = Get-HaloTicketType
-            $Type = $Types | Where-Object { $_.id -eq $Body.HaloPSA.TicketType }
-            #Write-Information ($Type | ConvertTo-Json)
-            if ($Type) {
-                $Body.HaloPSA.TicketType = @{
-                    label = $Type.name
-                    value = $Type.id
+        $Config = (Get-CIPPAzDataTableEntity @Table).config
+        if (Test-Json -Json $Config) {
+            $Body = $Config | ConvertFrom-Json -Depth 10 -ErrorAction Stop
+            if ($Body.HaloPSA.TicketType -and !$Body.HaloPSA.TicketType.value) {
+                # translate ticket type to autocomplete format
+                Write-Information "Ticket Type: $($Body.HaloPSA.TicketType)"
+                $Types = Get-HaloTicketType
+                $Type = $Types | Where-Object { $_.id -eq $Body.HaloPSA.TicketType }
+                #Write-Information ($Type | ConvertTo-Json)
+                if ($Type) {
+                    $Body.HaloPSA.TicketType = @{
+                        label = $Type.name
+                        value = $Type.id
+                    }
                 }
             }
+        } else {
+            $Body = @{}
         }
     } catch {
         Write-Information (Get-CippException -Exception $_ | ConvertTo-Json)
         $Body = @{}
     }
     return [HttpResponseContext]@{
-            StatusCode = [HttpStatusCode]::OK
-            Body       = $body
-        }
+        StatusCode = [HttpStatusCode]::OK
+        Body       = $body
+    }
 
 }