# Launch Titanium script v 2.0 2/18/15 by Bruce Cowper
# This script launches Titanium Projector on the local machine and provides a toggle on / off mechanism. i.e. if Titanium Projector is not running, it it launched, if it is running, it is killed.

function Running ($app)
    {
    # This function tests to see if the $app is running and either returns the process ID, or $False
    $Running = Get-Process $app -ErrorAction SilentlyContinue
    if($Running -eq $null)
        {
        $Running = $False
        }
    return $Running
    }

# set variable defaults
$running = $False
$appname = "TitaniumProjector"

# check to see what OS version is installed - note that the path for Titanium will change between the x86 and x64 bit OS versions.
if ((Get-WmiObject -Class Win32_OperatingSystem -ea 0).OSArchitecture -eq '64-bit') 

    {
    # set the app path for x64 PCs             
    $apppath = "C:\Program Files (x86)\Microsoft Research\Titanium Projection\"         
    } 
else  
    {
    # set the app path for x86 PCs
    $apppath = "C:\Program Files\Microsoft Research\Titanium Projection\"
    }

# build full app path for execution
$fullapppath = $apppath+$appname

# import User32.dll to enable viewing of current app screen status (ShowWindowAsync)
$sig = '[DllImport("user32.dll")] public static extern bool ShowWindowAsync(IntPtr hWnd, int nCmdShow);'
Add-Type -MemberDefinition $sig -name NativeMethods -namespace Win32

# minimize PowerShell - this avoids having the PowerShell window on screen during execution of script.
$PSId = @(Get-Process "powershell" -ErrorAction SilentlyContinue)[0].MainWindowHandle 
[Win32.NativeMethods]::ShowWindowAsync($PSId, 2)

# check to see if the $app is running
$running = Running ($appname)
If ($running -eq $False) #if the app is not running, we want to start it.
    {
    # start application
    $app = start-process $fullapppath -passthru
    
    # minimize Titanium to wait for incoming connection
    start-sleep 1
    If ($app.MainWindowHandle)
        {
        [Win32.NativeMethods]::ShowWindowAsync($app.MainWindowHandle, 6)
        }
    # wait timer for incoming connection. 
    # Note that on a wired network handshaking will be almost instant, but on slower wireless devices this may need to be increased.
    start-sleep 3

    # Restore titanium to full screen
    If ($app.MainWindowHandle)
        {
        [Win32.NativeMethods]::ShowWindowAsync($app.MainWindowHandle, 3)
        }

    }
Else # If the process is already running, we want to kill it. This allows us to toggle the app state
    {
    
    Get-Process $appname | Stop-Process
    }