DSCResources/MSFT_SPOSiteDesignRights/MSFT_SPOSiteDesignRights.psm1

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

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

        [Parameter(Mandatory = $true)]
        [ValidateSet("View", "None")]
        [System.String]
        $Rights,

        [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]
        $CertificatePath,

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

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

    Write-Verbose -Message "Getting configuration for SPO SiteDesignRights for $SiteDesignTitle"
    #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

    $nullReturn = @{
        SiteDesignTitle       = $SiteDesignTitle
        UserPrincipals        = $UserPrincipals
        Rights                = $Rights
        Ensure                = "Absent"
        GlobalAdminAccount    = $GlobalAdminAccount
        ApplicationId         = $ApplicationId
        TenantId              = $TenantId
        CertificatePassword   = $CertificatePassword
        CertificatePath       = $CertificatePath
        CertificateThumbprint = $CertificateThumbprint
    }

    Write-Verbose -Message "Getting Site Design Rights for $SiteDesignTitle"

    $siteDesign = Get-PnPSiteDesign -Identity $SiteDesignTitle
    if ($null -eq $siteDesign)
    {
        throw "Site Design with title $SiteDesignTitle doesn't exist in tenant"
    }

    Write-Verbose -Message "Site Design ID is $($siteDesign.Id)"

    $siteDesignRights = Get-PnPSiteDesignRights -Identity $siteDesign.Id -ErrorAction SilentlyContinue | `
        Where-Object -FilterScript { $_.Rights -eq $Rights }

    if ($null -eq $siteDesignRights)
    {
        Write-Verbose -Message "No Site Design Rights exist for site design $SiteDesignTitle."
        return $nullReturn
    }

    $curUserPrincipals = @()

    foreach ($siteDesignRight in $siteDesignRights)
    {
        $curUserPrincipals += $siteDesignRight.PrincipalName.split("|")[2]
    }

    Write-Verbose -Message "Site Design Rights User Principals = $($curUserPrincipals)"
    return @{
        SiteDesignTitle       = $SiteDesignTitle
        UserPrincipals        = $curUserPrincipals
        Rights                = $Rights
        Ensure                = "Present"
        GlobalAdminAccount    = $GlobalAdminAccount
        ApplicationId         = $ApplicationId
        TenantId              = $TenantId
        CertificatePassword   = $CertificatePassword
        CertificatePath       = $CertificatePath
        CertificateThumbprint = $CertificateThumbprint
    }
}

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

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

        [Parameter(Mandatory = $true)]
        [ValidateSet("View", "None")]
        [System.String]
        $Rights,

        [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]
        $CertificatePath,

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

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

    Write-Verbose -Message "Setting configuration for SPO SiteDesignRights for $SiteDesignTitle"
    #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

    $cursiteDesign = Get-PnPSiteDesign -Identity $SiteDesignTitle
    if ($null -eq $cursiteDesign)
    {
        throw "Site Design with title $SiteDesignTitle doesn't exist in tenant"
    }

    $currentSiteDesignRights = Get-TargetResource @PSBoundParameters
    $CurrentParameters = $PSBoundParameters

    if ($currentSiteDesignRights.Ensure -eq "Present")
    {
        $difference = Compare-Object -ReferenceObject $currentSiteDesignRights.UserPrincipals -DifferenceObject $CurrentParameters.UserPrincipals

        if ($difference.InputObject)
        {
            Write-Verbose -Message "Detected a difference in the current design rights of user principals and the desired one"
            $principalsToRemove = @()
            $principalsToAdd = @()
            foreach ($diff in $difference)
            {
                if ($diff.SideIndicator -eq "<=")
                {
                    $principalsToRemove += $diff.InputObject
                }
                elseif ($diff.SideIndicator -eq "=>")
                {
                    $principalsToAdd += $diff.InputObject
                }
            }

            if ($principalsToAdd.Count -gt 0 -and $Ensure -eq "Present")
            {
                Write-Verbose -Message "Granting SiteDesign rights on site design $SiteDesignTitle"
                Grant-PnPSiteDesignRights -Identity $cursiteDesign.Id -Principals $principalsToAdd -Rights $Rights
            }

            if ($principalsToRemove.Count -gt 0)
            {
                Write-Verbose -Message "Revoking SiteDesign rights on $principalsToRemove for site design $SiteDesignTitle with Id $($cursiteDesign.Id)"
                Revoke-PnPSiteDesignRights -Identity $cursiteDesign.Id -Principals $principalsToRemove
            }
        }
    }
    if ($Ensure -eq "Absent")
    {
        Write-Verbose -Message "Revoking SiteDesign rights on $UserPrincipals for site design $SiteDesignTitle"
        Revoke-PnPSiteDesignRights -Identity $cursiteDesign.Id -Principals $UserPrincipals
    }

    #No site design rights currently exist so add them
    If ($currentSiteDesignRights.Ensure -eq "Absent")
    {
        Write-Verbose -Message "Granting SiteDesign rights on site design $SiteDesignTitle"
        Grant-PnPSiteDesignRights -Identity $cursiteDesign.Id -Principals $UserPrincipals -Rights $Rights
    }
}

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

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

        [Parameter(Mandatory = $true)]
        [ValidateSet("View", "None")]
        [System.String]
        $Rights,

        [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]
        $CertificatePath,

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

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

    Write-Verbose -Message "Testing configuration for SPO SiteDesignRights for $SiteDesignTitle"

    $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 @("UserPrincipals", `
            "Rights", `
            "Ensure")

    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

    [array]$siteDesigns = Get-PnPSiteDesign

    $dscContent = ""
    $i = 1
    Write-Host "`r`n" -NoNewLine
    foreach ($siteDesign in $siteDesigns)
    {
        Write-Host " |---[$i/$($siteDesigns.Count)] $($siteDesign.Title)" -NoNewLine

        $Params = @{
            SiteDesignTitle       = $siteDesign.Title
            Rights                = "View"
            ApplicationId         = $ApplicationId
            TenantId              = $TenantId
            CertificatePassword   = $CertificatePassword
            CertificatePath       = $CertificatePath
            CertificateThumbprint = $CertificateThumbprint
            GlobalAdminAccount    = $GlobalAdminAccount
        }
        $Results = Get-TargetResource @PArams
        if ($Results.Ensure -eq "Present")
        {
            $Results = Update-M365DSCExportAuthenticationResults -ConnectionMode $ConnectionMode `
                -Results $Results
            $dscContent += Get-M365DSCExportContentForResource -ResourceName $ResourceName `
                -ConnectionMode $ConnectionMode `
                -ModulePath $PSScriptRoot `
                -Results $Results `
                -GlobalAdminAccount $GlobalAdminAccount
        }

        $Params = @{
            SiteDesignTitle       = $siteDesign.Title
            Rights                = "None"
            ApplicationId         = $ApplicationId
            TenantId              = $TenantId
            CertificatePassword   = $CertificatePassword
            CertificatePath       = $CertificatePath
            CertificateThumbprint = $CertificateThumbprint
            GlobalAdminAccount    = $GlobalAdminAccount
        }
        $Results = Get-TargetResource @Params
        if ($Results.Ensure -eq "Present")
        {
            $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