DSCResources/MSFT_EXOSafeLinksRule/MSFT_EXOSafeLinksRule.psm1

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

        [Parameter(Mandatory = $true)]
        [System.String]
        $SafeLinksPolicy,

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

        [Parameter()]
        [System.Boolean]
        $Enabled = $true,

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

        [Parameter()]
        [System.String[]]
        $ExceptIfRecipientDomainIs = @(),

        [Parameter()]
        [System.String[]]
        $ExceptIfSentTo = @(),

        [Parameter()]
        [System.String[]]
        $ExceptIfSentToMemberOf = @(),

        [Parameter()]
        [uint32]
        $Priority,

        [Parameter()]
        [System.String[]]
        $RecipientDomainIs = @(),

        [Parameter()]
        [System.String[]]
        $SentTo = @(),

        [Parameter()]
        [System.String[]]
        $SentToMemberOf = @(),

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

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

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

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

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

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

        [Parameter()]
        [Switch]
        $ManagedIdentity,

        [Parameter()]
        [System.String[]]
        $AccessTokens
    )
    Write-Verbose -Message "Setting configuration of SafeLinksRule for $Identity"
    if ($Global:CurrentModeIsExport)
    {
        $ConnectionMode = New-M365DSCConnection -Workload 'ExchangeOnline' `
            -InboundParameters $PSBoundParameters `
            -SkipModuleReload $true
    }
    else
    {
        $ConnectionMode = New-M365DSCConnection -Workload 'ExchangeOnline' `
            -InboundParameters $PSBoundParameters
    }

    #Ensure the proper dependencies are installed in the current environment.
    Confirm-M365DSCDependencies

    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName -replace 'MSFT_', ''
    $CommandName = $MyInvocation.MyCommand
    $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
        -CommandName $CommandName `
        -Parameters $PSBoundParameters
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    $nullReturn = $PSBoundParameters
    $nullReturn.Ensure = 'Absent'

    try
    {
        $SafeLinksRules = Get-SafeLinksRule -ErrorAction Stop
        $SafeLinksRule = $SafeLinksRules | Where-Object -FilterScript { $_.Identity -eq $Identity }

        if (-not $SafeLinksRule)
        {
            Write-Verbose -Message "SafeLinksRule $($Identity) does not exist."
            return $nullReturn
        }
        else
        {
            $result = @{
                Identity                  = $SafeLinksRule.Identity
                SafeLinksPolicy           = $SafeLinksRule.SafeLinksPolicy
                Comments                  = $SafeLinksRule.Comments
                Enabled                   = $true
                ExceptIfRecipientDomainIs = $SafeLinksRule.ExceptIfRecipientDomainIs
                ExceptIfSentTo            = $SafeLinksRule.ExceptIfSentTo
                ExceptIfSentToMemberOf    = $SafeLinksRule.ExceptIfSentToMemberOf
                Priority                  = $SafeLinksRule.Priority
                RecipientDomainIs         = $SafeLinksRule.RecipientDomainIs
                SentTo                    = $SafeLinksRule.SentTo
                SentToMemberOf            = $SafeLinksRule.SentToMemberOf
                Credential                = $Credential
                Ensure                    = 'Present'
                ApplicationId             = $ApplicationId
                CertificateThumbprint     = $CertificateThumbprint
                CertificatePath           = $CertificatePath
                CertificatePassword       = $CertificatePassword
                Managedidentity           = $ManagedIdentity.IsPresent
                TenantId                  = $TenantId
                AccessTokens              = $AccessTokens
            }

            if ('Enabled' -eq $SafeLinksRule.State)
            {
                # Accounts for Get-SafeLinksRule returning 'State' instead of 'Enabled' used by New/Set
                $result.Enabled = $true
            }
            else
            {
                $result.Enabled = $false
            }

            Write-Verbose -Message "Found SafeLinksRule $($Identity)"
            Write-Verbose -Message "Get-TargetResource Result: `n $(Convert-M365DscHashtableToString -Hashtable $result)"
            return $result
        }
    }
    catch
    {
        New-M365DSCLogEntry -Message 'Error retrieving data:' `
            -Exception $_ `
            -Source $($MyInvocation.MyCommand.Source) `
            -TenantId $TenantId `
            -Credential $Credential

        return $nullReturn
    }
}

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

        [Parameter(Mandatory = $true)]
        [System.String]
        $SafeLinksPolicy,

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

        [Parameter()]
        [System.Boolean]
        $Enabled = $true,

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

        [Parameter()]
        [System.String[]]
        $ExceptIfRecipientDomainIs = @(),

        [Parameter()]
        [System.String[]]
        $ExceptIfSentTo = @(),

        [Parameter()]
        [System.String[]]
        $ExceptIfSentToMemberOf = @(),

        [Parameter()]
        [uint32]
        $Priority,

        [Parameter()]
        [System.String[]]
        $RecipientDomainIs = @(),

        [Parameter()]
        [System.String[]]
        $SentTo = @(),

        [Parameter()]
        [System.String[]]
        $SentToMemberOf = @(),

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

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

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

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

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

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

        [Parameter()]
        [Switch]
        $ManagedIdentity,

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

    Write-Verbose -Message "Setting configuration of SafeLinksRule for $Identity"
    #Ensure the proper dependencies are installed in the current environment.
    Confirm-M365DSCDependencies

    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName -replace 'MSFT_', ''
    $CommandName = $MyInvocation.MyCommand
    $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
        -CommandName $CommandName `
        -Parameters $PSBoundParameters
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

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

    $SafeLinksRules = Get-SafeLinksRule
    $SafeLinksRule = $SafeLinksRules | Where-Object -FilterScript { $_.Identity -eq $Identity }
    $SafeLinksRuleParams = [System.Collections.Hashtable]($PSBoundParameters)
    $SafeLinksRuleParams.Remove('Ensure') | Out-Null
    $SafeLinksRuleParams.Remove('Credential') | Out-Null
    $SafeLinksRuleParams.Remove('ApplicationId') | Out-Null
    $SafeLinksRuleParams.Remove('TenantId') | Out-Null
    $SafeLinksRuleParams.Remove('CertificateThumbprint') | Out-Null
    $SafeLinksRuleParams.Remove('CertificatePath') | Out-Null
    $SafeLinksRuleParams.Remove('CertificatePassword') | Out-Null
    $SafeLinksRuleParams.Remove('ManagedIdentity') | Out-Null
    $SafeLinksRuleParams.Remove('AcccessTokens') | Out-Null

    if (('Present' -eq $Ensure ) -and (-not $SafeLinksRule))
    {
        New-EXOSafeLinksRule -SafeLinksRuleParams $PSBoundParameters
    }

    if (('Present' -eq $Ensure ) -and ($SafeLinksRule))
    {
        if ($PSBoundParameters.Enabled -and ('Disabled' -eq $SafeLinksRule.State))
        {
            # New-SafeLinksRule has the Enabled parameter, Set-SafeLinksRule does not.
            # There doesn't appear to be any way to change the Enabled state of a rule once created.
            Write-Verbose -Message "Removing SafeLinksRule $($Identity) in order to change Enabled state."
            Remove-SafeLinksRule -Identity $Identity -Confirm:$false
            New-EXOSafeLinksRule -SafeLinksRuleParams $PSBoundParameters
        }
        else
        {
            if ($SafeLinksRuleParams.SafeLinksPolicy -ne $SafeLinksRule.SafeLinksPolicy)
            {
                Set-EXOSafeLinksRule -SafeLinksRuleParams $SafeLinksRuleParams
            }
            else
            {
                $SafeLinksRuleParams.Remove('SafeLinksPolicy')
                Set-EXOSafeLinksRule -SafeLinksRuleParams $SafeLinksRuleParams
            }
        }
    }

    if (('Absent' -eq $Ensure ) -and ($SafeLinksRule))
    {
        Write-Verbose -Message "Removing SafeLinksRule $($Identity)"
        Remove-SafeLinksRule -Identity $Identity -Confirm:$false
    }
}

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

        [Parameter(Mandatory = $true)]
        [System.String]
        $SafeLinksPolicy,

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

        [Parameter()]
        [System.Boolean]
        $Enabled = $true,

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

        [Parameter()]
        [System.String[]]
        $ExceptIfRecipientDomainIs = @(),

        [Parameter()]
        [System.String[]]
        $ExceptIfSentTo = @(),

        [Parameter()]
        [System.String[]]
        $ExceptIfSentToMemberOf = @(),

        [Parameter()]
        [uint32]
        $Priority,

        [Parameter()]
        [System.String[]]
        $RecipientDomainIs = @(),

        [Parameter()]
        [System.String[]]
        $SentTo = @(),

        [Parameter()]
        [System.String[]]
        $SentToMemberOf = @(),

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

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

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

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

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

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

        [Parameter()]
        [Switch]
        $ManagedIdentity,

        [Parameter()]
        [System.String[]]
        $AccessTokens
    )
    #Ensure the proper dependencies are installed in the current environment.
    Confirm-M365DSCDependencies

    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName -replace 'MSFT_', ''
    $CommandName = $MyInvocation.MyCommand
    $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
        -CommandName $CommandName `
        -Parameters $PSBoundParameters
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    Write-Verbose -Message "Testing configuration of SafeLinksRule 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

    $TestResult = Test-M365DSCParameterState -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]
        $Credential,

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

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

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

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

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

        [Parameter()]
        [Switch]
        $ManagedIdentity,

        [Parameter()]
        [System.String[]]
        $AccessTokens
    )
    $ConnectionMode = New-M365DSCConnection -Workload 'ExchangeOnline' `
        -InboundParameters $PSBoundParameters `
        -SkipModuleReload $true

    #Ensure the proper dependencies are installed in the current environment.
    Confirm-M365DSCDependencies

    #region Telemetry
    $ResourceName = $MyInvocation.MyCommand.ModuleName -replace 'MSFT_', ''
    $CommandName = $MyInvocation.MyCommand
    $data = Format-M365DSCTelemetryParameters -ResourceName $ResourceName `
        -CommandName $CommandName `
        -Parameters $PSBoundParameters
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    $dscContent = ''

    try
    {
        if (Confirm-ImportedCmdletIsAvailable -CmdletName Get-SafeLinksRule)
        {
            [array]$SafeLinksRules = Get-SafeLinksRule -ErrorAction Stop

            if ($SafeLinksRules.Length -eq 0)
            {
                Write-Host $Global:M365DSCEmojiGreenCheckMark
            }
            else
            {
                Write-Host "`r`n" -NoNewline
            }
            $i = 1
            foreach ($SafeLinksRule in $SafeLinksRules)
            {
                Write-Host " |---[$i/$($SafeLinksRules.Length)] $($SafeLinksRule.Identity)" -NoNewline
                $Params = @{
                    Identity              = $SafeLinksRule.Identity
                    SafeLinksPolicy       = $SafeLinksRule.SafeLinksPolicy
                    Credential            = $Credential
                    ApplicationId         = $ApplicationId
                    TenantId              = $TenantId
                    CertificateThumbprint = $CertificateThumbprint
                    CertificatePassword   = $CertificatePassword
                    Managedidentity       = $ManagedIdentity.IsPresent
                    CertificatePath       = $CertificatePath
                    AccessTokens          = $AccessTokens
                }
                $Results = Get-TargetResource @Params
                $Results = Update-M365DSCExportAuthenticationResults -ConnectionMode $ConnectionMode `
                    -Results $Results
                $currentDSCBlock = Get-M365DSCExportContentForResource -ResourceName $ResourceName `
                    -ConnectionMode $ConnectionMode `
                    -ModulePath $PSScriptRoot `
                    -Results $Results `
                    -Credential $Credential
                $dscContent += $currentDSCBlock
                Save-M365DSCPartialExport -Content $currentDSCBlock `
                    -FileName $Global:PartialExportFileName
                Write-Host $Global:M365DSCEmojiGreenCheckMark
                $i++
            }
        }
        else
        {
            Write-Host "`r`n $($Global:M365DSCEmojiYellowCircle) The current tenant is not registered to allow for Safe Links Rules."
        }
        return $dscContent
    }
    catch
    {
        Write-Host $Global:M365DSCEmojiRedX

        New-M365DSCLogEntry -Message 'Error during Export:' `
            -Exception $_ `
            -Source $($MyInvocation.MyCommand.Source) `
            -TenantId $TenantId `
            -Credential $Credential

        return ''
    }
}

Export-ModuleMember -Function *-TargetResource