DSCResources/MSFT_SPSessionStateService/MSFT_SPSessionStateService.psm1

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

        [parameter(Mandatory = $true)]  
        [System.String] 
        $DatabaseServer,

        [parameter(Mandatory = $false)] 
        [ValidateSet("Present","Absent")] 
        [System.String] 
        $Ensure = "Present",

        [parameter(Mandatory = $false)] 
        [System.UInt32] 
        $SessionTimeout,

        [parameter(Mandatory = $false)] 
        [System.Management.Automation.PSCredential] 
        $InstallAccount
    )

    Write-Verbose -Message "Getting SPSessionStateService info"
    
    $result = Invoke-SPDSCCommand -Credential $InstallAccount `
                                  -Arguments $PSBoundParameters `
                                  -ScriptBlock {
        $params = $args[0]
        
        $svc = Get-SPSessionStateService
        $Ensure = "Absent"
        if ($svc.SessionStateEnabled -eq $true) 
        {
            $Ensure = "Present"
        }
        return @{
            DatabaseName = $svc.CatalogName
            DatabaseServer = $svc.ServerName
            Ensure = $Ensure
            SessionTimeout = $svc.Timeout.TotalMinutes
        }
    }
    return $result
}

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

        [parameter(Mandatory = $true)]  
        [System.String] 
        $DatabaseServer,

        [parameter(Mandatory = $false)] 
        [ValidateSet("Present","Absent")] 
        [System.String] 
        $Ensure = "Present",

        [parameter(Mandatory = $false)] 
        [System.UInt32] 
        $SessionTimeout,

        [parameter(Mandatory = $false)] 
        [System.Management.Automation.PSCredential] 
        $InstallAccount
    )

    Write-Verbose -Message "Setting SPSessionStateService info"

    if($SessionTimeout -eq 0) 
    {
        $SessionTimeout = 60    
    }
    
    if ($Ensure -eq "Present") 
    {
        Invoke-SPDSCCommand -Credential $InstallAccount `
                            -Arguments $PSBoundParameters `
                            -ScriptBlock {
            $params = $args[0]
            
            $svc = Get-SPSessionStateService
            if($svc.SessionStateEnabled)
            {
                if($svc.Timeout.TotalMinutes -ne $params.SessionTimeout){
                    Write-Verbose -Message "Configuring SPSessionState timeout"
                    Set-SPSessionStateService -SessionTimeout $params.SessionTimeout
                }
            }
            else 
            {
                Write-Verbose -Message "Enabling SPSessionState"
                Enable-SPSessionStateService -DatabaseName $params.DatabaseName `
                    -DatabaseServer $params.DatabaseServer `
                    -SessionTimeout $params.SessionTimeout
            }
        }
    }
    if ($Ensure -eq "Absent") 
    {
        Invoke-SPDSCCommand -Credential $InstallAccount `
                            -Arguments $PSBoundParameters `
                            -ScriptBlock {
            $params = $args[0]
            
            $svc = Get-SPSessionStateService
            if($svc.SessionStateEnabled)
            {
                Write-Verbose -Message "Disabling SPSessionState"
                Disable-SPSessionStateService 
            }  
            else 
            {
                Write-Verbose -Message "Keeping SPSessionState disabled"    
            } 
        }
    }
}

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

        [parameter(Mandatory = $true)]  
        [System.String] 
        $DatabaseServer,

        [parameter(Mandatory = $false)] 
        [ValidateSet("Present","Absent")] 
        [System.String] 
        $Ensure = "Present",

        [parameter(Mandatory = $false)] 
        [System.UInt32] 
        $SessionTimeout,

        [parameter(Mandatory = $false)] 
        [System.Management.Automation.PSCredential] 
        $InstallAccount
    )

    Write-Verbose -Message "Testing SPSessionStateService info"

    $PSBoundParameters.Ensure = $Ensure

    $CurrentValues = Get-TargetResource @PSBoundParameters

    if ($Ensure -eq "Present") 
    {
        return Test-SPDscParameterState -CurrentValues $CurrentValues `
                                        -DesiredValues $PSBoundParameters `
                                        -ValuesToCheck @("Ensure","SessionTimeout")
    } 
    else 
    {
        return Test-SPDscParameterState -CurrentValues $CurrentValues `
                                        -DesiredValues $PSBoundParameters `
                                        -ValuesToCheck @("Ensure")    
    }   
}

Export-ModuleMember -Function *-TargetResource