Public/Request-Moderation.ps1

function Request-Moderation {
    [CmdletBinding()]
    [OutputType([pscustomobject])]
    param (
        <#
          In OpenAI's API, this corresponds to the "Input" parameter name.
          But avoid using the variable name $Input for variable name,
          because it is used as an automatic variable in PowerShell.
        #>

        [Parameter(Position = 0, ValueFromPipeline)]
        [ValidateNotNullOrEmpty()]
        [Alias('Input')]
        [string[]]$Text,

        [Parameter()]
        [string[]]$Images,

        [Parameter()]
        [Completions('text-moderation-latest', 'text-moderation-stable', 'omni-moderation-latest')]
        [string][LowerCaseTransformation()]$Model,

        [Parameter()]
        [int]$TimeoutSec = 0,

        [Parameter()]
        [System.Uri]$ApiBase,

        [Parameter()]
        [ValidateRange(0, 100)]
        [int]$MaxRetryCount = 0,

        [Parameter()]
        [securestring][SecureStringTransformation()]$ApiKey,

        [Parameter()]
        [Alias('OrgId')]
        [string]$Organization,

        [Parameter()]
        [System.Collections.IDictionary]$AdditionalQuery,

        [Parameter()]
        [System.Collections.IDictionary]$AdditionalHeaders,

        [Parameter()]
        [object]$AdditionalBody
    )

    begin {
        # Get API endpoint
        $OpenAIParameter = Get-OpenAIAPIParameter -EndpointName 'Moderation' -Parameters $PSBoundParameters -ErrorAction Stop
    }

    process {
        # Text or Image is required
        if ($Text.Count -eq 0 -and $Images.Count -eq 0) {
            Write-Error -Exception ([System.ArgumentException]::new('"Text" or "Images" property is required.'))
            return
        }

        #region Construct parameters for API request
        $PostBody = [System.Collections.Specialized.OrderedDictionary]::new()
        $InputArray = @()

        foreach ($txt in $Text) {
            if ($Images.Count -gt 0) {
                $InputArray += [pscustomobject]@{
                    raw_input = $txt
                    input     = @{type = 'text'; text = $txt }
                }
            }
            else {
                $InputArray += [pscustomobject]@{
                    raw_input = $txt
                    input     = $txt
                }
            }
        }

        foreach ($image in $Images) {
            if (Test-Path -LiteralPath $image -PathType Leaf) {
                $InputArray += [pscustomobject]@{
                    raw_input = $image
                    input     = @{type = 'image_url'; image_url = @{url = (Convert-ImageToDataURL $image) } }
                }
            }
            else {
                $InputArray += [pscustomobject]@{
                    raw_input = $image
                    input     = @{type = 'image_url'; image_url = @{url = $image } }
                }
            }
        }

        $PostBody.input = @($InputArray.input)

        if ($PSBoundParameters.ContainsKey('Model')) {
            $PostBody.model = $Model
        }
        #endregion

        #region Send API Request
        $params = @{
            Method            = $OpenAIParameter.Method
            Uri               = $OpenAIParameter.Uri
            ContentType       = $OpenAIParameter.ContentType
            TimeoutSec        = $OpenAIParameter.TimeoutSec
            MaxRetryCount     = $OpenAIParameter.MaxRetryCount
            ApiKey            = $OpenAIParameter.ApiKey
            Organization      = $OpenAIParameter.Organization
            Body              = $PostBody
            AdditionalQuery   = $AdditionalQuery
            AdditionalHeaders = $AdditionalHeaders
            AdditionalBody    = $AdditionalBody
        }
        $Response = Invoke-OpenAIAPIRequest @params

        # error check
        if ($null -eq $Response) {
            return
        }
        #endregion

        #region Parse response object
        try {
            $Response = $Response | ConvertFrom-Json -ErrorAction Stop
        }
        catch {
            Write-Error -Exception $_.Exception
        }
        #endregion

        #region Output
        if ($null -ne $Response) {
            # Add custom type name and properties to output object.
            $Response.PSObject.TypeNames.Insert(0, 'PSOpenAI.Moderation')
            for ($i = 0; $i -lt @($Response.results).Count; $i++) {
                @($Response.results)[$i] | Add-Member -MemberType NoteProperty -Name 'Input' -Value $InputArray[$i].raw_input

                # Output a warning message when input text violates the content policy
                if (@($Response.results)[$i].flagged -eq $true) {
                    $Violate = @($Response.results)[$i].categories.psobject.Properties.Where({ $_.Value -eq $true }).Name -join ', '
                    Write-Warning "This content may violate the content policy. ($Violate)"
                }
            }
            Write-Output $Response
        }
        #endregion
    }

    end {

    }
}