add available cmdlet support

Author: JohnDuprey

Modules/CIPPCore/Public/Entrypoints/HTTP Functions/Email-Exchange/Invoke-ListExoRequest.ps1

@@ -16,49 +16,76 @@ function Invoke-ListExoRequest {
         $Tenants = Get-Tenants -IncludeErrors
         $Tenant = $Tenants | Where-Object { $_.defaultDomainName -eq $TenantFilter -or $_.customerId -eq $TenantFilter }
         if ($Tenant.customerId -in $AllowedTenants -or $AllowedTenants -eq 'AllTenants') {
-            if ($AllowedVerbs -notcontains $Verb) {
-                $Body = [pscustomobject]@{
-                    Results = "Invalid cmdlet: $Cmdlet"
+            if ($Request.Body.AvailableCmdlets) {
+                $ExoRequest = @{
+                    TenantID         = $TenantFilter
+                    AvailableCmdlets = $true
+                }
+                if ($Request.Body.AsApp -eq $true) {
+                    $ExoRequest.AsApp = $true
+                }
+                if ($Request.Body.Compliance -eq $true) {
+                    $ExoRequest.Compliance = $true
+                }
+                $Results = New-ExoRequest @ExoRequest
+                $Body = [PSCustomObject]@{
+                    Results  = $Results | Select-Object @{ Name = 'Cmdlet'; Expression = { $_ } }
+                    Metadata = @{
+                        Count = ($Results | Measure-Object).Count
+                    }
+                }
+            } else {
+                if ($AllowedVerbs -notcontains $Verb) {
+                    $Body = [pscustomobject]@{
+                        Results = "Invalid cmdlet: $Cmdlet"
+                    }
+                    Push-OutputBinding -Name Response -Value ([HttpResponseContext]@{
+                            StatusCode = [HttpStatusCode]::BadRequest
+                            Body       = $Body
+                        })
+                    return
+                }
+                $ExoParams = @{
+                    Cmdlet    = $Cmdlet
+                    cmdParams = $cmdParams
+                    tenantid  = $TenantFilter
                 }
-                Push-OutputBinding -Name Response -Value ([HttpResponseContext]@{
-                        StatusCode = [HttpStatusCode]::BadRequest
-                        Body       = $Body
-                    })
-                return
-            }
-            $ExoParams = @{
-                Cmdlet    = $Cmdlet
-                cmdParams = $cmdParams
-                tenantid  = $TenantFilter
-            }
 
-            if ($Request.Body.Select) {
-                $ExoParams.Select = $Request.Body.Select
-            }
+                if ($Request.Body.Select) {
+                    $ExoParams.Select = $Request.Body.Select
+                }
 
-            if ($Request.Body.UseSystemMailbox -eq $true) {
-                $ExoParams.useSystemMailbox = $true
-            }
+                if ($Request.Body.UseSystemMailbox -eq $true) {
+                    $ExoParams.useSystemMailbox = $true
+                }
 
-            if ($Request.Body.Anchor) {
-                $ExoParams.Anchor = $Request.Body.Anchor
-            }
+                if ($Request.Body.Anchor) {
+                    $ExoParams.Anchor = $Request.Body.Anchor
+                }
 
-            if ($Request.Body.Compliance -eq $true) {
-                $ExoParams.Compliance = $true
-            }
+                if ($Request.Body.Compliance -eq $true) {
+                    $ExoParams.Compliance = $true
+                }
 
-            if ($Request.Body.AsApp -eq $true) {
-                $ExoParams.AsApp = $true
-            }
+                if ($Request.Body.AsApp -eq $true) {
+                    $ExoParams.AsApp = $true
+                }
 
-            $Results = New-ExoRequest @ExoParams
-            $Body = [pscustomobject]@{
-                Results = $Results
-            }
-        } else {
-            $Body = [pscustomobject]@{
-                Results = "Invalid tenant: $TenantFilter"
+                try {
+                    $Results = New-ExoRequest @ExoParams
+                    $Body = [pscustomobject]@{
+                        Results = $Results
+                    }
+                } catch {
+                    $ErrorMessage = Get-NormalizedError -Message $_.Exception.Message
+                    $Body = [pscustomobject]@{
+                        Results = @(@{ Error = $ErrorMessage })
+                    }
+                }
+            } else {
+                $Body = [pscustomobject]@{
+                    Results = "Invalid tenant: $TenantFilter"
+                }
             }
         }
     } catch {