feat: 初版提交

src/main/java/cn/hamster3/mc/plugin/script/HamsterScriptPlugin.java

@@ -0,0 +1,197 @@
+package cn.hamster3.mc.plugin.script;
+
+import lombok.Getter;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.configuration.ConfigurationSection;
+import org.bukkit.configuration.file.FileConfiguration;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import javax.script.*;
+import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.StandardCopyOption;
+import java.util.*;
+import java.util.stream.Collectors;
+
+@SuppressWarnings("CallToPrintStackTrace")
+public class HamsterScriptPlugin extends JavaPlugin {
+    @Getter
+    private static ScriptEngine engine;
+    @Getter
+    private static Invocable invocable;
+    private static File codeFolder;
+    private boolean enableEvalCommand;
+
+    @Override
+    public void onEnable() {
+        reload();
+        codeFolder = new File(getDataFolder(), "code");
+        if (codeFolder.mkdirs()) {
+            getLogger().info("创建代码文件夹: " + codeFolder.getAbsolutePath());
+            try {
+                Files.copy(
+                        Objects.requireNonNull(getResource("code/example.js")),
+                        new File(codeFolder, "example.js").toPath(),
+                        StandardCopyOption.REPLACE_EXISTING
+                );
+            } catch (IOException ignored) {
+            }
+        }
+    }
+
+    private void reload() {
+        saveDefaultConfig();
+        reloadConfig();
+        FileConfiguration config = getConfig();
+        enableEvalCommand = config.getBoolean("enable-eval-command", false);
+        engine = new ScriptEngineManager(getClassLoader()).getEngineByName("JavaScript");
+        invocable = (Invocable) engine;
+        ConfigurationSection importConfig = config.getConfigurationSection("import");
+        if (importConfig != null) {
+            for (String key : importConfig.getKeys(false)) {
+                String string = importConfig.getString(key);
+                try {
+                    Class<?> clazz = Class.forName(string);
+                    engine.put(key, clazz);
+                    engine.eval(String.format("%s = %s.static;", key, key));
+                    getLogger().info("将 " + string + " 导入为 " + key);
+                } catch (ClassNotFoundException e) {
+                    getLogger().warning("将 " + string + " 导入为 " + key + " 失败：未找到这个类");
+                } catch (ScriptException e) {
+                    getLogger().warning("将 " + string + " 导入为 " + key + " 失败");
+                    e.printStackTrace();
+                }
+            }
+        }
+
+    }
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
+        if (!sender.hasPermission("hamster.script.admin")) {
+            sender.sendMessage("§c你没有这个权限");
+            return true;
+        }
+        if (args.length < 1) {
+            sender.sendMessage("§c请输入命令");
+            return true;
+        }
+        switch (args[0]) {
+            case "eval": {
+                if (!enableEvalCommand) {
+                    sender.sendMessage("§c当前不允许直接执行 JavaScript");
+                    return true;
+                }
+                if (args.length < 2) {
+                    sender.sendMessage("§c请输入 JavaScript 代码内容");
+                    return true;
+                }
+                StringBuilder builder = new StringBuilder();
+                for (int i = 1; i < args.length; i++) {
+                    builder.append(args[i]).append(" ");
+                }
+                String code = builder.toString();
+                long start = System.currentTimeMillis();
+                try {
+                    Bindings bindings = engine.createBindings();
+                    bindings.put("sender", sender);
+                    Object eval = engine.eval(code, bindings);
+                    long time = System.currentTimeMillis() - start;
+                    sender.sendMessage("§aJavaScript 代码执行完成, 耗时: " + time + " 毫秒");
+                    sender.sendMessage("§a返回值: §f" + eval);
+                } catch (ScriptException e) {
+                    long time = System.currentTimeMillis() - start;
+                    sender.sendMessage("§cJavaScript 代码执行出错, 耗时: " + time + " 毫秒");
+                    sender.sendMessage("§c异常原因: " + e.getMessage());
+                    e.printStackTrace();
+                }
+                break;
+            }
+            case "run": {
+                if (args.length < 2) {
+                    sender.sendMessage("§c请输入 JavaScript 文件名称");
+                    return true;
+                }
+                File file = new File(codeFolder, args[1]);
+                if (!file.exists() && !args[1].endsWith(".js")) {
+                    file = new File(codeFolder, args[1] + ".js");
+                }
+                if (!file.exists()) {
+                    sender.sendMessage("§c未找到 JavaScript 文件: " + file.getAbsolutePath());
+                    return true;
+                }
+                String code;
+                try {
+                    List<String> lines = Files.readAllLines(file.toPath(), StandardCharsets.UTF_8);
+                    code = String.join("\n", lines);
+                } catch (IOException e) {
+                    sender.sendMessage("§c读取 JavaScript 文件内容 " + file.getAbsolutePath() + " 时出错！");
+                    e.printStackTrace();
+                    return true;
+                }
+                long start = System.currentTimeMillis();
+                try {
+                    Bindings bindings = engine.createBindings();
+                    bindings.put("sender", sender);
+                    Object eval = engine.eval(code, bindings);
+                    long time = System.currentTimeMillis() - start;
+                    sender.sendMessage("§aJavaScript 代码执行完成, 耗时: " + time + " 毫秒");
+                    sender.sendMessage("§a返回值: §f" + eval);
+                } catch (ScriptException e) {
+                    long time = System.currentTimeMillis() - start;
+                    sender.sendMessage("§cJavaScript 代码执行出错, 耗时: " + time + " 毫秒");
+                    sender.sendMessage("§c异常原因: " + e.getMessage());
+                    e.printStackTrace();
+                }
+                break;
+            }
+            case "reset": {
+                engine = new ScriptEngineManager().getEngineByName("JavaScript");
+                invocable = (Invocable) engine;
+                sender.sendMessage("§a已重设 JavaScript 引擎环境");
+                break;
+            }
+            case "reload": {
+                reload();
+                sender.sendMessage("§a插件重载完成");
+                break;
+            }
+            default: {
+                sender.sendMessage("§c未找到该命令");
+                break;
+            }
+        }
+        return true;
+    }
+
+    @Nullable
+    @Override
+    public List<String> onTabComplete(@NotNull CommandSender sender, @NotNull Command command, @NotNull String alias, @NotNull String[] args) {
+        if (args.length == 1) {
+            List<String> list = new ArrayList<>();
+            list.add("eval");
+            list.add("run");
+            list.add("reset");
+            list.add("reload");
+            String startWith = args[0].toLowerCase();
+            list.removeIf(o -> !o.startsWith(startWith));
+            return list;
+        }
+        if (args[0].equalsIgnoreCase("run")) {
+            File[] files = codeFolder.listFiles();
+            if (files != null) {
+                String startWith = args[1].toLowerCase();
+                return Arrays.stream(files)
+                        .map(File::getName)
+                        .filter(o -> o.toLowerCase().startsWith(startWith))
+                        .collect(Collectors.toList());
+            }
+        }
+        return Collections.emptyList();
+    }
+}

src/main/resources/code/example.js

@@ -0,0 +1,6 @@
+function sayHi(param) {
+    param.sendMessage("Hi!");
+}
+
+// 执行命令的对象会自动设置为变量 sender
+sayHi(sender);

src/main/resources/config.yml

@@ -0,0 +1,6 @@
+# 是否允许通过指令执行 JavaScript 代码
+enable-eval-command: false
+
+# 导入的 Java 代码
+import:
+  Bukkit: org.bukkit.Bukkit

src/main/resources/plugin.yml

@@ -0,0 +1,13 @@
+name: HamsterScript
+main: cn.hamster3.mc.plugin.script.HamsterScriptPlugin
+version: ${version}
+api-version: 1.13
+
+commands:
+  scripts:
+    aliases: script
+
+permissions:
+  hamster.script.admin:
+    description: Admin permission
+    default: op