DSCResources/MSFT_SPOSiteAuditSettings/MSFT_SPOSiteAuditSettings.psm1

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

        [Parameter(Mandatory = $true)]
        [ValidateSet('All', 'None')]
        [System.String]
        $AuditFlags,

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

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

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

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

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

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

    Write-Verbose -Message "Getting SPOSiteAuditSettings for {$Url}"
    #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

    $nullReturn = @{
        Url                   = $Url
        AuditFlags            = 'None'
        GlobalAdminAccount    = $GlobalAdminAccount
        ApplicationId         = $ApplicationId
        TenantId              = $TenantId
        CertificatePassword   = $CertificatePassword
        CertificatePath       = $CertificatePath
        CertificateThumbprint = $CertificateThumbprint
    }

    try
    {

        $ConnectionMode = New-M365DSCConnection -Platform 'PNP' `
            -InboundParameters $PSBoundParameters `
            -Url $Url -ErrorAction SilentlyContinue
        $auditSettings = Get-PnPAuditing -ErrorAction Stop
        $auditFlag = $auditSettings.AuditFlags
        if ($null -eq $auditFlag)
        {
            $auditFlag = 'None'
        }
        return @{
            Url                   = $Url
            AuditFlags            = $auditFlag
            GlobalAdminAccount    = $GlobalAdminAccount
            ApplicationId         = $ApplicationId
            TenantId              = $TenantId
            CertificatePassword   = $CertificatePassword
            CertificatePath       = $CertificatePath
            CertificateThumbprint = $CertificateThumbprint

        }
    }
    catch
    {
        if ($error[0].Exception.Message -like "No connection available")
        {
            Write-Verbose -Message "Make sure that you are connected to your PnPConnection"
        }
        return $nullReturn
    }
}

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

        [Parameter(Mandatory = $true)]
        [ValidateSet('All', 'None')]
        [System.String]
        $AuditFlags,

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

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

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

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

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

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

    Write-Verbose -Message "Setting Audit settings for {$Url}"

    #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 'PNP' `
        -InboundParameters $PSBoundParameters `
        -Url $Url

    if ($AuditFlags -eq 'All')
    {
        Set-PnPAuditing -EnableAll
    }
    else
    {
        Set-PnPAuditing -DisableAll
    }
}

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

        [Parameter(Mandatory = $true)]
        [ValidateSet('All', 'None')]
        [System.String]
        $AuditFlags,

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

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

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

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

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

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

    Write-Verbose -Message "Testing audit settings for {$Url}"
    $CurrentValues = Get-TargetResource @PSBoundParameters

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

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

    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]
        $CertificatePath,

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

        [Parameter()]
        [System.String]
        $CertificateThumbprint
    )
    #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 'PNP' `
        -InboundParameters $PSBoundParameters

    $sites = Get-PnPTenantSite

    $i = 1
    Write-Host "`r`n" -NoNewLine
    $dscContent = ""
    foreach ($site in $sites)
    {
        try
        {
            Write-Host " [$i/$($sites.Length)] Audit Settings for {$($site.Url)}" -NoNewLine

            $Params = @{
                Url                   = $site.Url
                AuditFlags            = 'None'
                ApplicationId         = $ApplicationId
                TenantId              = $TenantId
                CertificatePassword   = $CertificatePassword
                CertificatePath       = $CertificatePath
                CertificateThumbprint = $CertificateThumbprint
                GlobalAdminAccount    = $GlobalAdminAccount
            }

            $Results = Get-TargetResource @params

            if ([System.String]::IsNullOrEmpty($Results.AuditFlags))
            {
                $Results.AuditFlags = 'None'
            }
            $dscContent += Get-M365DSCExportContentForResource -ResourceName $ResourceName `
                -ConnectionMode $ConnectionMode `
                -ModulePath $PSScriptRoot `
                -Results $Results `
                -GlobalAdminAccount $GlobalAdminAccount
            Write-Host $Global:M365DSCEmojiGreenCheckMark
        }
        catch
        {
            Write-Verbose "There was an issue retrieving Audit Settings for $Url"
        }
        $i++
    }
    return $dscContent
}

Export-ModuleMember -Function *-TargetResource