// ===========================================================================
// 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.
// ===========================================================================
//
//
// Creation Date:  3 Februrary 2004
//
    
global proc doTruncateHairCache() {
	// Make sure that we have a fluid selected
	// or warn the user and fail

	string $selectedHairSystems[] = `getSelectedHairSystems`; 
	if( size( $selectedHairSystems ) == 0 )	{
		warning(uiRes("m_doDeleteHairPB.kNoHairSystemSelected"));
		return;
	}

	if( !`exists hairPlaybackCaches_disableUnselected` ) {
		source "hairPlaybackCaches.mel";
	}
	
	int $oldEnable = `getAttr globalCacheControl.writeEnable`;
	string $disabledCaches[] = `hairPlaybackCaches_disableUnselected`;
	setAttr globalCacheControl.writeEnable 1;


	for( $hairShape in $selectedHairSystems ) {
		if(`connectionInfo -id ($hairShape + ".diskCache")` > 0 ) {
		// FIX_LATER ?
		//
		//		if( !fluidDiskCacheHasLocalCopy() ) {
		//			return;
		//		}
		
			truncateHairCache $hairShape;
		}
	}

	setAttr globalCacheControl.writeEnable $oldEnable;
	hairPlaybackCaches_enable( $disabledCaches );
}