DSCResources/MSFT_TeamsUpgradeConfiguration/MSFT_TeamsUpgradeConfiguration.psm1

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

        [Parameter()]
        [System.Boolean]
        $DownloadTeams,

        [Parameter()]
        [System.String]
        [ValidateSet("SkypeMeetingsApp", "NativeLimitedClient")]
        $SfBMeetingJoinUx,

        [Parameter(Mandatory = $true)]
        [System.Management.Automation.PSCredential]
        $GlobalAdminAccount
    )
    Write-Verbose -Message "Checking the Teams Upgrade Configuration"

    #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

    $settings = Get-CsTeamsUpgradeConfiguration
    return @{
        IsSingleInstance   = 'Yes'
        DownloadTeams      = $settings.DownloadTeams
        SfBMeetingJoinUx   = $settings.SfBMeetingJoinUx
        GlobalAdminAccount = $GlobalAdminAccount
    }
}

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

        [Parameter()]
        [System.Boolean]
        $DownloadTeams,

        [Parameter()]
        [System.String]
        [ValidateSet("SkypeMeetingsApp", "NativeLimitedClient")]
        $SfBMeetingJoinUx,

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

    Write-Verbose -Message "Setting Teams Upgrade Configuration"

    #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

    $SetParameters = $PSBoundParameters
    $SetParameters.Remove("IsSingleInstance") | Out-Null
    $SetParameters.Remove("GlobalAdminAccount") | Out-Null

    Set-CsTeamsUpgradeConfiguration @SetParameters
}

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

        [Parameter()]
        [System.Boolean]
        $DownloadTeams,

        [Parameter()]
        [System.String]
        [ValidateSet("SkypeMeetingsApp", "NativeLimitedClient")]
        $SfBMeetingJoinUx,

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

    Write-Verbose -Message "Testing configuration of Team Upgrade Settings"

    $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
    )
    #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 = @{
        IsSingleInstance   = 'Yes'
        GlobalAdminAccount = $GlobalAdminAccount
    }
    $result = Get-TargetResource @params
    $result.GlobalAdminAccount = Resolve-Credentials -UserName "globaladmin"
    $content = " TeamsUpgradeConfiguration " + (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