FTLUtilities.java

package net.vhati.modmanager.core;

import java.io.File;

public class FTLUtilities {

	/**
	 * Confirms the FTL resources dir exists and contains the dat files.
	 */
	public static boolean isDatsDirValid(File d) {
		if (!d.exists() || !d.isDirectory())
			return false;
		if (!new File(d, "data.dat").exists())
			return false;
		if (!new File(d, "resource.dat").exists())
			return false;
		return true;
	}

	/**
	 * Returns the FTL resources dir, or null.
	 */
	public static File findDatsDir() {
		String steamPath = "Steam/steamapps/common/FTL Faster Than Light/resources";
		String gogPath = "GOG.com/Faster Than Light/resources";
		String humblePath = "FTL/resources";

		String xdgDataHome = System.getenv("XDG_DATA_HOME");
		if (xdgDataHome == null)
			xdgDataHome = System.getProperty("user.home") + "/.local/share";

		File[] candidates = new File[] {
				// Windows - Steam
				new File(new File("" + System.getenv("ProgramFiles(x86)")), steamPath),
				new File(new File("" + System.getenv("ProgramFiles")), steamPath),
				// Windows - GOG
				new File(new File("" + System.getenv("ProgramFiles(x86)")), gogPath),
				new File(new File("" + System.getenv("ProgramFiles")), gogPath),
				// Windows - Humble Bundle
				new File(new File("" + System.getenv("ProgramFiles(x86)")), humblePath),
				new File(new File("" + System.getenv("ProgramFiles")), humblePath),
				// Linux - Steam
				new File(xdgDataHome + "/Steam/SteamApps/common/FTL Faster Than Light/data/resources"),
				// OSX - Steam
				new File(System.getProperty("user.home") + "/Library/Application Support/Steam/SteamApps/common/FTL Faster Than Light/FTL.app/Contents/Resources"),
				// OSX
				new File("/Applications/FTL.app/Contents/Resources")
		};

		File result = null;

		for (File candidate : candidates) {
			if (isDatsDirValid(candidate)) {
				result = candidate;
				break;
			}
		}

		return result;
	}
}