/**
* Copyright (C) 2013-2014 Project-Vethrfolnir
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.vethrfolnir.game.services;
import groovy.util.GroovyScriptEngine;
import java.io.File;
import java.lang.reflect.Field;
import java.net.MalformedURLException;
import java.net.URL;
import java.util.ArrayList;
import com.vethrfolnir.logging.MuLogger;
import corvus.corax.config.CorvusConfig;
/**
* @author Vlad
*
* GroovyScriptEngine is basically a handler for GroovyClassLoader, we should
* make our system around GroovyClassLoader than GroovyScriptEngine
*/
public class ScriptingService {
private static final MuLogger log = MuLogger.getLogger(ScriptingService.class);
public static final File ScriptDir = new File(CorvusConfig.WorkingDirectory, "system/scripts");
private final GroovyScriptEngine engine;
private Field ScriptEngineRoots;
public ScriptingService() {
engine = new GroovyScriptEngine(getPackageURLs());
try { // so bad
ScriptEngineRoots = engine.getClass().getDeclaredField("roots");
ScriptEngineRoots.setAccessible(true);
}
catch (Exception e) {
log.warn("Failed getting Script engine roots field, new paths wont be added at runtime.", e);
}
log.info("Ready.");
}
public void loadScripts() {
reparsePackages();
try {
ArrayList<File> files = listScriptFiles(ScriptDir);
for (int i = 0; i < files.size(); i++) {
File l = files.get(i);
engine.loadScriptByName(l.getName());
}
engine.run("MasterScript.groovy", "");
}
catch (Exception e) {
log.fatal("Failed loading master script!", e);
}
}
/**
* @return the engine
*/
public GroovyScriptEngine getEngine() {
return engine;
}
public void reparsePackages() {
URL[] urls = getPackageURLs();
try { ScriptEngineRoots.set(engine, urls); } catch (Exception e) { log.warn("Hm..", e); }
for(URL url : urls) {
if(!isUsed(url)) {
engine.getGroovyClassLoader().addURL(url);
}
}
}
private boolean isUsed(URL url) {
URL[] usedURLS = engine.getGroovyClassLoader().getURLs();
for(URL link : usedURLS) {
if(link.equals(url)) {
return true;
}
}
return false;
}
public static URL[] getPackageURLs() {
ArrayList<File> files = listDirectories(ScriptDir);
URL[] urls = new URL[files.size()];
for (int i = 0; i < urls.length; i++) {
File dir = files.get(i);
try {
urls[i] = dir.toURI().toURL();
}
catch (MalformedURLException e) {
log.fatal("Failed converting[File="+dir+"] to url.", e);
}
}
return urls;
}
public static ArrayList<File> listDirectories(File file) {
ArrayList<File> files = new ArrayList<File>();
File[] fs = file.listFiles();
for (int i = 0; i < fs.length; i++) {
File dir = fs[i];
if(dir.isDirectory()) {
files.add(dir);
files.addAll(listDirectories(dir));
}
}
return files;
}
private static ArrayList<File> listScriptFiles(File dir) {
ArrayList<File> files = new ArrayList<File>();
File[] fs = dir.listFiles();
for (int i = 0; i < fs.length; i++) {
File file = fs[i];
if(file.isDirectory()) {
files.addAll(listScriptFiles(file));
}
else if (file.getName().endsWith("groovy") || file.getName().endsWith("java")){
files.add(file);
}
}
return files;
}
}