DSCResources/MSFT_EXOAcceptedDomain/MSFT_EXOAcceptedDomain.psm1

function Get-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.Collections.Hashtable])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidatePattern( '(?=^.{1,254}$)(^(?:(?!\d+\.|-)[a-zA-Z0-9_\-]{1,63}(?<!-)\.?)+(?:[a-zA-Z]{2,})$)' )]
        [System.String]
        $Identity,

        [Parameter()]
        [ValidateSet('Authoritative','InternalRelay')]
        [System.String]
        $DomainType = 'Authoritative',

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

        [Parameter()]
        [ValidateScript( { $false -eq $_ })]
        [System.Boolean]
        $MatchSubDomains = $false,

        [Parameter()]
        [ValidateScript( { $false -eq $_ })]
        [System.Boolean]
        $OutboundOnly = $false,

        [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 Accepted Domain 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
    }

    Write-Verbose -Message 'Getting all Accepted Domain'
    $AllAcceptedDomains = Get-AcceptedDomain

    Write-Verbose -Message 'Filtering Accepted Domain list by Identity'
    $AcceptedDomain = $AllAcceptedDomains | Where-Object -FilterScript { $_.Identity -eq $Identity }

    if ($null -eq $AcceptedDomain)
    {
        Write-Verbose -Message "AcceptedDomain configuration for $($Identity) does not exist."

        # Check to see if $Identity matches a verified domain in the O365 Tenant
        $ConnectionMode = New-M365DSCConnection -Platform 'AzureAd' `
           -InboundParameters $PSBoundParameters

        $VerifiedDomains = Get-AzureADDomain | Where-Object -FilterScript { $_.IsVerified }
        $MatchingVerifiedDomain = $VerifiedDomains | Where-Object -FilterScript { $_.Name -eq $Identity }

        if ($null -ne $MatchingVerifiedDomain)
        {
            Write-Verbose -Message "A verified domain matching $($Identity) does not exist in this O365 Tenant."
            $nullReturn = @{
                DomainType         = $DomainType
                Ensure             = $Ensure
                GlobalAdminAccount = $GlobalAdminAccount
                Identity           = $Identity
                MatchSubDomains    = $MatchSubDomains
                OutboundOnly       = $OutboundOnly
            }
            <#
            if AcceptedDomain does not exist and does not match a verified domain, return submitted parameters for ReverseDSC.
            This also prevents Set-TargetResource from running when current state could not be determined
            #>

            return $nullReturn
        }
        else
        {
            $result = @{
                DomainType            = $DomainType
                Ensure                = 'Absent'
                GlobalAdminAccount    = $GlobalAdminAccount
                Identity              = $Identity
                MatchSubDomains       = $MatchSubDomains
                OutboundOnly          = $OutboundOnly
                ApplicationId         = $ApplicationId
                TenantId              = $TenantId
                CertificateThumbprint = $CertificateThumbprint
                CertificatePath       = $CertificatePath
                CertificatePassword   = $CertificatePassword
            }
            # if AcceptedDomain does not exist for a verfied domain, return 'Absent' with submitted parameters to Test-TargetResource.
            return $result
        }
    }
    else
    {
        $result = @{
            DomainType            = $AcceptedDomain.DomainType
            Ensure                = 'Present'
            Identity              = $AcceptedDomain.Identity
            MatchSubDomains       = $AcceptedDomain.MatchSubDomains
            OutboundOnly          = $AcceptedDomain.OutboundOnly
            GlobalAdminAccount    = $GlobalAdminAccount
            ApplicationId         = $ApplicationId
            TenantId              = $TenantId
            CertificateThumbprint = $CertificateThumbprint
            CertificatePath       = $CertificatePath
            CertificatePassword   = $CertificatePassword
        }

        Write-Verbose -Message "Found AcceptedDomain configuration for $($Identity)"
        return $result
    }
}

function Set-TargetResource
{
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidatePattern( '(?=^.{1,254}$)(^(?:(?!\d+\.|-)[a-zA-Z0-9_\-]{1,63}(?<!-)\.?)+(?:[a-zA-Z]{2,})$)' )]
        [System.String]
        $Identity,

        [Parameter()]
        [ValidateSet('Authoritative','InternalRelay')]
        [System.String]
        $DomainType = 'Authoritative',

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

        [Parameter()]
        [ValidateScript( { $false -eq $_ })]
        [System.Boolean]
        $MatchSubDomains = $false,

        [Parameter()]
        [ValidateScript( { $false -eq $_ })]
        [System.Boolean]
        $OutboundOnly = $false,

        [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 Accepted Domain 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

    $AcceptedDomainParams = @{
        DomainType      = $DomainType
        Identity        = $Identity
        MatchSubDomains = $MatchSubDomains
        OutboundOnly    = $OutboundOnly
    }

    Write-Verbose -Message "Setting AcceptedDomain for $($Identity) with values: $(Convert-M365DscHashtableToString -Hashtable $AcceptedDomainParams)"
    Set-AcceptedDomain @AcceptedDomainParams
}

function Test-TargetResource
{
    [CmdletBinding()]
    [OutputType([System.Boolean])]
    param
    (
        [Parameter(Mandatory = $true)]
        [ValidatePattern( '(?=^.{1,254}$)(^(?:(?!\d+\.|-)[a-zA-Z0-9_\-]{1,63}(?<!-)\.?)+(?:[a-zA-Z]{2,})$)' )]
        [System.String]
        $Identity,

        [Parameter()]
        [ValidateSet('Authoritative','InternalRelay')]
        [System.String]
        $DomainType = 'Authoritative',

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

        [Parameter()]
        [ValidateScript( { $false -eq $_ })]
        [System.Boolean]
        $MatchSubDomains = $false,

        [Parameter()]
        [ValidateScript( { $false -eq $_ })]
        [System.Boolean]
        $OutboundOnly = $false,

        [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 Accepted Domain 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

    [array]$AllAcceptedDomains = Get-AcceptedDomain

    $dscContent = ""
    $i = 1
    if ($AllAcceptedDomains.Length -eq 0)
    {
        Write-Host $Global:M365DSCEmojiGreenCheckMark
    }
    else
    {
        Write-Host "`r`n" -NoNewLine
    }
    foreach ($domain in $AllAcceptedDomains)
    {
        Write-Host " |---[$i/$($AllAcceptedDomains.Count)] $($domain.Identity)" -NoNewLine

        $Params = @{
            Identity              = $domain.Identity
            ApplicationId         = $ApplicationId
            TenantId              = $TenantId
            CertificateThumbprint = $CertificateThumbprint
            CertificatePassword   = $CertificatePassword
            CertificatePath       = $CertificatePath
            GlobalAdminAccount    = $GlobalAdminAccount
        }
        $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++
    }
    return $dscContent
}

Export-ModuleMember -Function *-TargetResource