// ===========================================================================
// Copyright 2018 Autodesk, Inc. All rights reserved.
//
// Use of this software is subject to the terms of the Autodesk license
// agreement provided at the time of installation or download, or which
// otherwise accompanies this software in either electronic or hard copy form.
// ===========================================================================

proc int clipHasGhost( string $clip )
{
	// First determine if the clip has a ghost
	string $plugs[] = `listConnections -p 1 -s 1 -d 0 ( $clip + ".clipData" )`;
	if ( size( $plugs ) == 0 ) 
		return 0;

	// If a ghost is found, determine if it is visible
	string $node = plugNode( $plugs[0] );
	return `getAttr ( $node + ".visibility" )`;
}

// Determine if the named clips have ghost associated with them.
// 
// Returns 0 - If none of the clips have ghosts
//         1 - If all clips have ghosts
//         2 - If some clips have ghosts and others don't
//
global proc int clipsAreGhosted( string $clips[] )
{
	int $sum = 0;
	for ( $clip in $clips )
		$sum += clipHasGhost( $clip );

	if      ( $sum == 0 )
		return 0;

	else if ( $sum == size( $clips ) )
		return 1;

	return 2;
}