# Check Powershell Snapin
# Author: Yusuf Ozturk
# http://www.yusufozturk.info
 
function Check-PSSnapin
{
param (
    [Parameter(
        Mandatory = $true,
        HelpMessage = 'PowerShell Snapin Name. Example: Microsoft.SystemCenter.VirtualMachineManager')]
    [string]$Name
)
 
	$Success = "1";
	$CheckSnapin = Get-PSSnapin -Name $Name -EA SilentlyContinue
	if (!$CheckSnapin)
	{
		$AddSnapin = Add-PSSnapin -Name $Name -EA SilentlyContinue
		$CheckSnapin = Get-PSSnapin -Name $Name -EA SilentlyContinue
		if (!$CheckSnapin)
		{
			Write-Debug "$Name Snapin is not available."
		}
		else
		{
			Write-Debug "$Name Snapin is added."
			$Success
		}
	}
	else
	{
		Write-Debug "$Name Snapin is already loaded."
		$Success
	}
}

Check-PSSnapin -Name "Microsoft.SystemCenter.VirtualMachineManager"

# Check WMI Object
# Author: Yusuf Ozturk
# http://www.yusufozturk.info
 
function Check-WmiObject
{
param (
    [Parameter(
        Mandatory = $true,
        HelpMessage = 'Wmi NameSpace. Example: root\virtualization')]
    [string]$NameSpace,
 
    [Parameter(
        Mandatory = $false,
        HelpMessage = 'Name of the Wmi Host. Example: Server01')]
    [string]$WMIHost
)
 
	$Success = "1";
	if (!$WMIHost)
	{
		$CheckWmiObject = Get-WmiObject -Computer "." -Namespace "$NameSpace" -List -EA SilentlyContinue
		if (!$CheckWmiObject)
		{
			Write-Debug "Could not contact with Wmi Provider."
		}
		else
		{
			Write-Debug "Wmi Provider is available."
			$Success
		}
	}
	else
	{
		$CheckWmiObject = Get-WmiObject -Computer "$WMIHost" -Namespace "$NameSpace" -List -EA SilentlyContinue
		if (!$CheckWmiObject)
		{
			Write-Debug "Could not contact with Wmi Provider."
		}
		else
		{
			Write-Debug "Wmi Provider is available."
			$Success
		}
	}
}

Check-WmiObject -NameSpace "root\virtualization"

Check-WmiObject -NameSpace "root\virtualization" -WmiHost "Server01"

Function Sync-OutlookCalendar 
{
	# Connect to Outlook
	$Outlook = New-Object -com Outlook.Application
	# Get Calendars
	$Calendar1 = $Outlook.Session.folders.Item(1).Folders | where {$_.DefaultMessageClass -eq "IPM.Appointment"}
	$Calendar2 = $Outlook.Session.folders.Item(2).Folders | where {$_.DefaultMessageClass -eq "IPM.Appointment"}
	# Search Calendar Items
	$Calendar1Items = $Calendar1.items | Where {$_.Start -gt (Get-Date)} | Select-Object -Property Start, End, Subject, Location, MeetingStatus
	# Sync All: $Calendar1Items = $Calendar1.items | Select-Object -Property Start, End, Subject, Location, MeetingStatus
	# Sync Calendar Items
	Foreach ($Calendar1Item in $Calendar1Items)
	{
		$SearchDuplicate = $Calendar2.items | Where {$_.Start -eq $Calendar1Item.Start -and $_.End -eq $Calendar1Item.End -and $_.Subject -eq $Calendar1Item.Subject} | Select-Object -Property Start, End, Subject, Location, MeetingStatus
		if ($SearchDuplicate -eq $null)
		{
			$Appointment = $Calendar2.Items.Add(1)
			$Appointment.Start = $Calendar1Item.Start
			$Appointment.End = $Calendar1Item.End
			$Appointment.Subject = $Calendar1Item.Subject
			$Appointment.Location = $Calendar1Item.Location
			$Appointment.MeetingStatus = $Calendar1Item.MeetingStatus
			$Appointment.Save()
		}
		else
		{
			Write-Host "Appointment is already exist"
		}
	}
}