DSCResources/MSFT_TeamsGuestCallingConfiguration/MSFT_TeamsGuestCallingConfiguration.psm1

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

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

        [Parameter(Mandatory = $true)]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount
    )

    Write-Verbose -Message "Getting configuration of Teams Guest Calling"

    #region Telemetry
    $data = [System.Collections.Generic.Dictionary[[String], [String]]]::new()
    $data.Add("Resource", $MyInvocation.MyCommand.ModuleName)
    $data.Add("Method", $MyInvocation.MyCommand)
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    Test-MSCloudLogin -CloudCredential $GlobalAdminAccount `
        -Platform SkypeForBusiness

    try
    {
        $config = Get-CsTeamsGuestCallingConfiguration

        $result = @{
            Identity                         = $config.Identity
            AllowPrivateCalling              = $config.AllowPrivateCalling
            GlobalAdminAccount               = $GlobalAdminAccount
        }
        return $result
    }
    catch
    {
        throw $_
    }
}

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

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

        [Parameter(Mandatory = $true)]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount
    )

    Write-Verbose -Message "Setting configuration of Teams Guest Calling"

    #region Telemetry
    $data = [System.Collections.Generic.Dictionary[[String], [String]]]::new()
    $data.Add("Resource", $MyInvocation.MyCommand.ModuleName)
    $data.Add("Method", $MyInvocation.MyCommand)
    Add-M365DSCTelemetryEvent -Data $data
    #endregion

    Test-MSCloudLogin -CloudCredential $GlobalAdminAccount `
        -Platform SkypeForBusiness

    $CurrentValues = Get-TargetResource @PSBoundParameters
    $SetParams = $PSBoundParameters
    $SetParams.Remove("GlobalAdminAccount") | Out-Null

    if ($AllowPrivateCalling -ne $CurrentValues.AllowPrivateCalling)
    {
        Set-CsTeamsGuestCallingConfiguration @SetParams
    }
}

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

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

        [Parameter(Mandatory = $true)]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount
    )

    Write-Verbose -Message "Testing configuration of Teams Guest Calling"

    $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(Mandatory = $true)]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount
    )
    $InformationPreference ='Continue'

    #region Telemetry
    $data = [System.Collections.Generic.Dictionary[[String], [String]]]::new()
    $data.Add("Resource", $MyInvocation.MyCommand.ModuleName)
    $data.Add("Method", $MyInvocation.MyCommand)
    Add-M365DSCTelemetryEvent -Data $data
    #endregion


    $params = @{
        Identity            = "Global"
        AllowPrivateCalling = $true
        GlobalAdminAccount  = $GlobalAdminAccount
    }
    $result = Get-TargetResource @params
    $result.GlobalAdminAccount = Resolve-Credentials -UserName "globaladmin"
    $content = " TeamsGuestCallingConfiguration " + (New-GUID).ToString() + "`r`n"
    $content += " {`r`n"
    $currentDSCBlock = Get-DSCBlock -Params $result -ModulePath $PSScriptRoot
    $content += Convert-DSCStringParamToVariable -DSCBlock $currentDSCBlock -ParameterName "GlobalAdminAccount"
    $content += " }`r`n"
    return $content
}

Export-ModuleMember -Function *-TargetResource