DSCResources/MSFT_EXOSafeAttachmentPolicy/MSFT_EXOSafeAttachmentPolicy.psm1

function Get-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.Collections.Hashtable])]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.String]
        $Identity,

        [Parameter()]
        [ValidateSet('Block', 'Replace', 'Allow', 'DynamicDelivery')]
        [System.String]
        $Action = 'Block',

        [Parameter()]
        [Boolean]
        $ActionOnError = $false,

        [Parameter()]
        [System.String]
        $AdminDisplayName,

        [Parameter()]
        [Boolean]
        $Enable = $false,

        [Parameter()]
        [Boolean]
        $Redirect = $false,

        [Parameter()]
        [System.String]
        $RedirectAddress,

        [Parameter()]
        [ValidateSet('Present', 'Absent')]
        [System.String]
        $Ensure = 'Present',

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [System.String]
        $CertificatePath,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $CertificatePassword
    )

    Write-Verbose -Message "Getting configuration of SafeAttachmentPolicy for $Identity"
    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName.Replace("MSFT_", "")
    $data = [System.Collections.Generic.Dictionary[[String], [String]]]::new()
    $data.Add("Resource", $ResourceName)
    $data.Add("Method", $MyInvocation.MyCommand)
    $data.Add("Principal", $GlobalAdminAccount.UserName)
    $data.Add("TenantId", $TenantId)
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    if ($Global:CurrentModeIsExport)
    {
        $ConnectionMode = New-M365DSCConnection -Platform 'ExchangeOnline' `
            -InboundParameters $PSBoundParameters `
            -SkipModuleReload $true
    }
    else
    {
        $ConnectionMode = New-M365DSCConnection -Platform 'ExchangeOnline' `
            -InboundParameters $PSBoundParameters
    }

    $SafeAttachmentPolicies = Get-SafeAttachmentPolicy

    $SafeAttachmentPolicy = $SafeAttachmentPolicies | Where-Object -FilterScript { $_.Identity -eq $Identity }
    if (-not $SafeAttachmentPolicy)
    {
        Write-Verbose -Message "SafeAttachmentPolicy $($Identity) does not exist."
        $result = $PSBoundParameters
        $result.Ensure = 'Absent'
        return $result
    }
    else
    {
        $result = @{
            Ensure             = 'Present'
            Identity           = $Identity
            Action             = $SafeAttachmentPolicy.Action
            ActionOnError      = $SafeAttachmentPolicy.ActionOnError
            AdminDisplayName   = $SafeAttachmentPolicy.AdminDisplayName
            Enable             = $SafeAttachmentPolicy.Enable
            Redirect           = $SafeAttachmentPolicy.Redirect
            RedirectAddress    = $SafeAttachmentPolicy.RedirectAddress
            GlobalAdminAccount = $GlobalAdminAccount
        }

        Write-Verbose -Message "Found SafeAttachmentPolicy $($Identity)"
        Write-Verbose -Message "Get-TargetResource Result: `n $(Convert-M365DscHashtableToString -Hashtable $result)"
        return $result
    }
}

function Set-TargetResource
{
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.String]
        $Identity,

        [Parameter()]
        [ValidateSet('Block', 'Replace', 'Allow', 'DynamicDelivery')]
        [System.String]
        $Action = 'Block',

        [Parameter()]
        [Boolean]
        $ActionOnError = $false,

        [Parameter()]
        [System.String]
        $AdminDisplayName,

        [Parameter()]
        [Boolean]
        $Enable = $false,

        [Parameter()]
        [Boolean]
        $Redirect = $false,

        [Parameter()]
        [System.String]
        $RedirectAddress,

        [Parameter()]
        [ValidateSet('Present', 'Absent')]
        [System.String]
        $Ensure = 'Present',

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [System.String]
        $CertificatePath,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $CertificatePassword
    )

    Write-Verbose -Message "Setting configuration of SafeAttachmentPolicy for $Identity"
    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName.Replace("MSFT_", "")
    $data = [System.Collections.Generic.Dictionary[[String], [String]]]::new()
    $data.Add("Resource", $ResourceName)
    $data.Add("Method", $MyInvocation.MyCommand)
    $data.Add("Principal", $GlobalAdminAccount.UserName)
    $data.Add("TenantId", $TenantId)
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    $ConnectionMode = New-M365DSCConnection -Platform 'ExchangeOnline' `
        -InboundParameters $PSBoundParameters

    $SafeAttachmentPolicyParams = $PSBoundParameters
    $SafeAttachmentPolicyParams.Remove('Ensure') | Out-Null
    $SafeAttachmentPolicyParams.Remove('GlobalAdminAccount') | Out-Null
    $SafeAttachmentPolicies = Get-SafeAttachmentPolicy

    $SafeAttachmentPolicy = $SafeAttachmentPolicies | Where-Object -FilterScript { $_.Identity -eq $Identity }
    if ('Present' -eq $Ensure )
    {
        if (-not $SafeAttachmentPolicy)
        {
            Write-Verbose -Message "Creating SafeAttachmentPolicy $($Identity)."
            $SafeAttachmentPolicyParams += @{
                Name = $SafeAttachmentPolicyParams.Identity
            }

            $SafeAttachmentPolicyParams.Remove('Identity') | Out-Null
            New-SafeAttachmentPolicy @SafeAttachmentPolicyParams
        }
        else
        {
            Write-Verbose -Message "Setting SafeAttachmentPolicy $Identity with values: $(Convert-M365DscHashtableToString -Hashtable $SafeAttachmentPolicyParams)"
            Set-SafeAttachmentPolicy @SafeAttachmentPolicyParams
        }
    }
    elseif (('Absent' -eq $Ensure) -and ($SafeAttachmentPolicy))
    {
        Write-Verbose -Message "Removing SafeAttachmentPolicy $($Identity) "
        Remove-SafeAttachmentPolicy -Identity $Identity -Confirm:$false -Force
    }
}

function Test-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [System.String]
        $Identity,

        [Parameter()]
        [ValidateSet('Block', 'Replace', 'Allow', 'DynamicDelivery')]
        [System.String]
        $Action = 'Block',

        [Parameter()]
        [Boolean]
        $ActionOnError = $false,

        [Parameter()]
        [System.String]
        $AdminDisplayName,

        [Parameter()]
        [Boolean]
        $Enable = $false,

        [Parameter()]
        [Boolean]
        $Redirect = $false,

        [Parameter()]
        [System.String]
        $RedirectAddress,

        [Parameter()]
        [ValidateSet('Present', 'Absent')]
        [System.String]
        $Ensure = 'Present',

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [System.String]
        $CertificatePath,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $CertificatePassword
    )

    Write-Verbose -Message "Testing configuration of SafeAttachmentPolicy for $Identity"

    $CurrentValues = Get-TargetResource @PSBoundParameters

    Write-Verbose -Message "Current Values: $(Convert-M365DscHashtableToString -Hashtable $CurrentValues)"
    Write-Verbose -Message "Target Values: $(Convert-M365DscHashtableToString -Hashtable $PSBoundParameters)"

    $ValuesToCheck = $PSBoundParameters
    $ValuesToCheck.Remove('GlobalAdminAccount') | Out-Null

    $TestResult = Test-Microsoft365DSCParameterState -CurrentValues $CurrentValues `
        -Source $($MyInvocation.MyCommand.Source) `
        -DesiredValues $PSBoundParameters `
        -ValuesToCheck $ValuesToCheck.Keys

    Write-Verbose -Message "Test-TargetResource returned $TestResult"

    return $TestResult
}

function Export-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.String])]
    param
    (
        [Parameter()]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount,

        [Parameter()]
        [System.String]
        $ApplicationId,

        [Parameter()]
        [System.String]
        $TenantId,

        [Parameter()]
        [System.String]
        $CertificateThumbprint,

        [Parameter()]
        [System.String]
        $CertificatePath,

        [Parameter()]
        [System.Management.Automation.PSCredential]
        $CertificatePassword
    )
    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName.Replace("MSFT_", "")
    $data = [System.Collections.Generic.Dictionary[[String], [String]]]::new()
    $data.Add("Resource", $ResourceName)
    $data.Add("Method", $MyInvocation.MyCommand)
    $data.Add("Principal", $GlobalAdminAccount.UserName)
    $data.Add("TenantId", $TenantId)
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    $ConnectionMode = New-M365DSCConnection -Platform 'ExchangeOnline' `
        -InboundParameters $PSBoundParameters `
        -SkipModuleReload $true

    $dscContent = ''
    if (Confirm-ImportedCmdletIsAvailable -CmdletName 'Get-SafeAttachmentPolicy')
    {
        $SafeAttachmentPolicies = Get-SafeAttachmentPolicy
        Write-Host "`r`n" -NoNewLine
        $i = 1
        foreach ($SafeAttachmentPolicy in $SafeAttachmentPolicies)
        {
            Write-Host " |---[$i/$($SafeAttachmentPolicies.Length)] $($SafeAttachmentPolicy.Identity)" -NoNewLine
            $Params = @{
                GlobalAdminAccount    = $GlobalAdminAccount
                Identity              = $SafeAttachmentPolicy.Identity
                ApplicationId         = $ApplicationId
                TenantId              = $TenantId
                CertificateThumbprint = $CertificateThumbprint
                CertificatePassword   = $CertificatePassword
                CertificatePath       = $CertificatePath
            }
            $Results = Get-TargetResource @Params
            $Results = Update-M365DSCExportAuthenticationResults -ConnectionMode $ConnectionMode `
                -Results $Results
            $dscContent += Get-M365DSCExportContentForResource -ResourceName $ResourceName `
                -ConnectionMode $ConnectionMode `
                -ModulePath $PSScriptRoot `
                -Results $Results `
                -GlobalAdminAccount $GlobalAdminAccount
            Write-Host $Global:M365DSCEmojiGreenCheckMark
            $i++
        }
        if ($SafeAttachmentPolicies.Length -eq 0)
        {
            Write-Host $Global:M365DSCEmojiGreenCheckMark
        }
    }
    else
    {
        Write-Host "`r`n $($Global:M365DSCEmojiYellowCircle) The current tenant doesn't have access to Safe Attachment Policy APIs."
    }
    return $dscContent
}

Export-ModuleMember -Function *-TargetResource