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src/main/java/scripting/AbstractScriptManager.java

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+/*
+This file is part of the OdinMS Maple Story Server
+Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
+Matthias Butz <matze@odinms.de>
+Jan Christian Meyer <vimes@odinms.de>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation version 3 as published by
+the Free Software Foundation. You may not use, modify or distribute
+this program under any other version of the GNU Affero General Public
+License.
+
+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 Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+package scripting;
+
+import client.MapleClient;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+
+import javax.script.*;
+
+import constants.net.ServerConstants;
+import jdk.nashorn.api.scripting.NashornScriptEngine;
+import tools.FilePrinter;
+
+/**
+ *
+ * @author Matze
+ */
+public abstract class AbstractScriptManager {
+    private ScriptEngineFactory sef;
+
+    protected AbstractScriptManager() {
+        sef = new ScriptEngineManager().getEngineByName("javascript").getFactory();
+    }
+
+    protected NashornScriptEngine getScriptEngine(String path) {
+        path = "scripts/" + path;
+        File scriptFile = new File(path);
+        if (!scriptFile.exists()) {
+            return null;
+        }
+        NashornScriptEngine engine = (NashornScriptEngine) sef.getScriptEngine();
+        try (FileReader fr = new FileReader(scriptFile)) {
+            if (ServerConstants.JAVA_8){
+                engine.eval("load('nashorn:mozilla_compat.js');" + System.lineSeparator());
+            }
+            engine.eval(fr);
+        } catch (final ScriptException | IOException t) {
+            FilePrinter.printError(FilePrinter.INVOCABLE + path.substring(12), t, path);
+            return null;
+        }
+
+        return engine;
+    }
+
+    protected NashornScriptEngine getScriptEngine(String path, MapleClient c) {
+        NashornScriptEngine engine = c.getScriptEngine("scripts/" + path);
+        if (engine == null) {
+            engine = getScriptEngine(path);
+            c.setScriptEngine(path, engine);
+        }
+
+        return engine;
+    }
+
+    protected void resetContext(String path, MapleClient c) {
+        c.removeScriptEngine("scripts/" + path);
+    }
+}