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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| classname=org.gotti.wurmunlimited.mods.christmasmod.ChristmasMod | ||
| classpath=christmasmod.jar | ||
| # Award the spyglass | ||
| present2015=489 |
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src/demo/christmasmod/org/gotti/wurmunlimited/mods/christmasmod/ChristmasMod.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,120 @@ | ||
| package org.gotti.wurmunlimited.mods.christmasmod; | ||
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| import java.util.Properties; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
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| import javassist.CannotCompileException; | ||
| import javassist.ClassPool; | ||
| import javassist.CtClass; | ||
| import javassist.CtMethod; | ||
| import javassist.NotFoundException; | ||
| import javassist.bytecode.BadBytecode; | ||
| import javassist.bytecode.Bytecode; | ||
| import javassist.bytecode.Descriptor; | ||
| import javassist.expr.ExprEditor; | ||
| import javassist.expr.MethodCall; | ||
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| import org.gotti.wurmunlimited.modloader.classhooks.CodeReplacer; | ||
| import org.gotti.wurmunlimited.modloader.classhooks.HookException; | ||
| import org.gotti.wurmunlimited.modloader.classhooks.HookManager; | ||
| import org.gotti.wurmunlimited.modloader.interfaces.Configurable; | ||
| import org.gotti.wurmunlimited.modloader.interfaces.PreInitable; | ||
| import org.gotti.wurmunlimited.modloader.interfaces.WurmMod; | ||
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| public class ChristmasMod implements WurmMod, PreInitable, Configurable { | ||
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| int present2015 = 972; | ||
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| @Override | ||
| public void configure(Properties properties) { | ||
| present2015 = Integer.valueOf(properties.getProperty("present2015", String.valueOf(present2015))); | ||
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| Logger.getLogger(ChristmasMod.class.getName()).log(Level.INFO, "present2015: " + present2015); | ||
| } | ||
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| @Override | ||
| public void preInit() { | ||
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| try { | ||
| ClassPool classPool = HookManager.getInstance().getClassPool(); | ||
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| CtClass ctWurmCalendar = classPool.get("com.wurmonline.server.WurmCalendar"); | ||
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| // com.wurmonline.server.WurmCalendar.isChristmas() | ||
| ctWurmCalendar.getMethod("isChristmas", "()Z").setBody("return nowIsBetween(17, 0, 23, 11, java.time.Year.now().getValue(), 6, 0, 29, 11, java.time.Year.now().getValue());"); | ||
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| // com.wurmonline.server.WurmCalendar.isBeforeChristmas() | ||
| ctWurmCalendar.getMethod("isBeforeChristmas", "()Z").setBody("return false;"); | ||
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| // com.wurmonline.server.WurmCalendar.isAfterChristmas() | ||
| ctWurmCalendar.getMethod("isAfterChristmas", "()Z").setBody("return nowIsAfter(6, 0, 29, 11, java.time.Year.now().getValue());"); | ||
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| // boolean action(final Action act, final Creature performer, final Item target, final short action, final float counter) { | ||
| CtClass[] parameterTypes = new CtClass[] { | ||
| classPool.get("com.wurmonline.server.behaviours.Action"), | ||
| classPool.get("com.wurmonline.server.creatures.Creature"), | ||
| classPool.get("com.wurmonline.server.items.Item"), | ||
| classPool.get("short"), | ||
| classPool.get("float") | ||
| }; | ||
| CtMethod action = classPool.get("com.wurmonline.server.behaviours.ItemBehaviour").getMethod("action", Descriptor.ofMethod(CtClass.booleanType, parameterTypes)); | ||
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| Bytecode bytecode = new Bytecode(action.getMethodInfo().getConstPool()); | ||
| bytecode.add(Bytecode.ALOAD_3); | ||
| bytecode.addInvokevirtual(classPool.get("com.wurmonline.server.items.Item"), "getAuxData", "()B"); | ||
| bytecode.add(Bytecode.BIPUSH); | ||
| bytecode.add(7); | ||
| bytecode.add(Bytecode.IF_ICMPNE); | ||
| bytecode.add(0, 13); | ||
| bytecode.add(Bytecode.SIPUSH); | ||
| bytecode.add(972 >> 8, 972 & 0xff); | ||
| byte[] search = bytecode.get(); | ||
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| bytecode = new Bytecode(action.getMethodInfo().getConstPool()); | ||
| bytecode.add(Bytecode.ALOAD_3); | ||
| bytecode.addInvokevirtual(classPool.get("com.wurmonline.server.items.Item"), "getAuxData", "()B"); | ||
| bytecode.add(Bytecode.BIPUSH); | ||
| bytecode.add(8); | ||
| bytecode.add(Bytecode.IF_ICMPNE); | ||
| bytecode.add(0, 13); | ||
| bytecode.add(Bytecode.SIPUSH); | ||
| bytecode.add(present2015 >> 8, present2015 & 0xff); | ||
| byte[] replace = bytecode.get(); | ||
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| new CodeReplacer(action.getMethodInfo().getCodeAttribute()).replaceCode(search, replace); | ||
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| // com.wurmonline.server.behaviours.ItemBehaviour.awardChristmasPresent(Creature) | ||
| classPool.get("com.wurmonline.server.behaviours.ItemBehaviour").getMethod("awardChristmasPresent", Descriptor.ofMethod(CtClass.voidType, new CtClass[] { classPool.get("com.wurmonline.server.creatures.Creature") })).instrument(new ExprEditor() { | ||
| @Override | ||
| public void edit(MethodCall m) throws CannotCompileException { | ||
| // com.wurmonline.server.items.Item.setAuxData(byte) | ||
| if (m.getClassName().equals("com.wurmonline.server.items.Item") && m.getMethodName().equals("setAuxData")) { | ||
| StringBuffer code = new StringBuffer(); | ||
| code.append("if (java.time.Year.now().getValue() > 2007) {\n"); | ||
| code.append(" $_ = $proceed((byte)(java.time.Year.now().getValue() - 2007));\n"); | ||
| code.append("} else {\n"); | ||
| code.append(" $_ = $proceed($$);\n"); | ||
| code.append("}"); | ||
| m.replace(code.toString()); | ||
| } | ||
| } | ||
| }); | ||
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| classPool.get("com.wurmonline.server.players.Player").getMethod("reimburse", "()V").instrument(new ExprEditor() { | ||
| @Override | ||
| public void edit(MethodCall m) throws CannotCompileException { | ||
| // com.wurmonline.server.players.PlayerInfo.setReimbursed(boolean) | ||
| if (m.getClassName().equals("com.wurmonline.server.players.PlayerInfo") && m.getMethodName().equals("setReimbursed")) { | ||
| m.replace("if (com.wurmonline.server.Servers.localServer.testServer || getPower() >= 4) { $proceed($$); };"); | ||
| } | ||
| } | ||
| }); | ||
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| } catch (NotFoundException | CannotCompileException | BadBytecode e) { | ||
| throw new HookException(e); | ||
| } | ||
| } | ||
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| } |