// Shave and a Haircut
// (c) 2019 Epic Games
// US Patent 6720962

#ifndef OSMac_
#include <sys/types.h>
#else
#include "shaveMacCarbon.h"
#endif

#include <sys/stat.h>

#ifndef _WIN32
#include <unistd.h>
#endif

#include <maya/MIntArray.h>
#include <maya/MString.h>
#include <maya/MStringArray.h>

#include "shaveIcon.h"

MStringArray	shaveIcon::mIcons;
MIntArray		shaveIcon::mTimestamps;


//
// See header file for documentation.
//
bool shaveIcon::needsReload(MString iconFile)
{
#ifdef _WIN32
	struct _stat	fileInfo;
	bool		fileExists = (_stat(iconFile.asChar(), &fileInfo) == 0);
#else
	struct stat	fileInfo;

# if defined(OSMac_) && !defined(OSMac_MachO_)
	MString		hfsFileName = shaveMacCarbon::makeMacFilename(iconFile);
	bool		fileExists = (stat(hfsFileName.asChar(), &fileInfo) == 0);
#else
	bool		fileExists = (stat(iconFile.asChar(), &fileInfo) == 0);
# endif
#endif
	bool		reload = false;

	unsigned int i;
	unsigned int numEntries = mIcons.length();

	for (i = 0; i < numEntries; i++)
		if (mIcons[i] == iconFile) break;

	if (fileExists)
	{
		if (i == numEntries)
		{
			//
			// New icon.
			//
			mIcons.append(iconFile);
			mTimestamps.append((long)fileInfo.st_mtime);
		}
		else
		{
			if (fileInfo.st_mtime != mTimestamps[i])
			{
				//
				// File has been modified since we last saw it, so update
				// its timestamp and force a reload.
				//
				mTimestamps[i] = (long)fileInfo.st_mtime;
				reload = true;
			}
		}
	}
	else
	{
		if (i < numEntries)
		{
			//
			// This file used to exist, but no longer does, so force a
			// reload and reset the timestamp to zero so that if it shows
			// up again, we'll force another reload.
			//
			reload = true;
			mTimestamps[i] = 0L;
		}
	}

	return reload;
}


void shaveIcon::cleanup()
{
	mIcons.clear();
	mTimestamps.clear();
}