Examples with JavaEvaluator com.github.natanbc.javaeval.JavaEvaluator used on opensource projects

Example 1 with JavaEvaluator

use of com.github.natanbc.javaeval.JavaEvaluator in project MantaroBot by Mantaro.

the class OwnerCmd method eval.

@Subscribe
public void eval(CommandRegistry cr) {
    // has no state
    JavaEvaluator javaEvaluator = new JavaEvaluator();
    Map<String, Evaluator> evals = new HashMap<>();
    evals.put("js", (event, code) -> {
        ScriptEngine script = new ScriptEngineManager().getEngineByName("nashorn");
        script.put("mantaro", MantaroBot.getInstance());
        script.put("db", MantaroData.db());
        script.put("jda", event.getJDA());
        script.put("event", event);
        script.put("guild", event.getGuild());
        script.put("channel", event.getChannel());
        try {
            return script.eval(String.join("\n", "load(\"nashorn:mozilla_compat.js\");", "imports = new JavaImporter(java.util, java.io, java.net);", "(function() {", "with(imports) {", code, "}", "})()"));
        } catch (Exception e) {
            return e;
        }
    });
    evals.put("bsh", (event, code) -> {
        Interpreter interpreter = new Interpreter();
        try {
            interpreter.set("mantaro", MantaroBot.getInstance());
            interpreter.set("db", MantaroData.db());
            interpreter.set("jda", event.getJDA());
            interpreter.set("event", event);
            interpreter.set("guild", event.getGuild());
            interpreter.set("channel", event.getChannel());
            return interpreter.eval(String.join("\n", "import *;", code));
        } catch (Exception e) {
            return e;
        }
    });
    evals.put("java", (event, code) -> {
        try {
            CompilationResult r = javaEvaluator.compile().addCompilerOptions("-Xlint:unchecked").source("Eval", JAVA_EVAL_IMPORTS + "\n\n" + "public class Eval {\n" + "   public static Object run(GuildMessageReceivedEvent event) {\n" + "       try {\n" + "           return null;\n" + "       } finally {\n" + "           " + (code + ";").replaceAll(";{2,}", ";") + "\n" + "       }\n" + "   }\n" + "}").execute();
            EvalClassLoader ecl = new EvalClassLoader();
            r.getClasses().forEach((name, bytes) -> ecl.define(bytes));
            return ecl.loadClass("Eval").getMethod("run", GuildMessageReceivedEvent.class).invoke(null, event);
        } catch (CompilationException e) {
            StringBuilder sb = new StringBuilder("\n");
            if (e.getCompilerOutput() != null)
                sb.append(e.getCompilerOutput());
            if (!e.getDiagnostics().isEmpty()) {
                if (sb.length() > 0)
                    sb.append("\n\n");
                e.getDiagnostics().forEach(d -> sb.append(d).append('\n'));
            }
            return new Error(sb.toString()) {

                @Override
                public String toString() {
                    return getMessage();
                }
            };
        } catch (Exception e) {
            return e;
        }
    });
    cr.register("eval", new SimpleCommand(Category.OWNER, CommandPermission.OWNER) {

        @Override
        protected void call(GuildMessageReceivedEvent event, String content, String[] args) {
            Evaluator evaluator = evals.get(args[0]);
            if (evaluator == null) {
                onHelp(event);
                return;
            }
            String[] values = SPLIT_PATTERN.split(content, 2);
            if (values.length < 2) {
                onHelp(event);
                return;
            }
            String v = values[1];
            Object result = evaluator.eval(event, v);
            boolean errored = result instanceof Throwable;
            event.getChannel().sendMessage(new EmbedBuilder().setAuthor("Evaluated " + (errored ? "and errored" : "with success"), null, event.getAuthor().getAvatarUrl()).setColor(errored ? Color.RED : Color.GREEN).setDescription(result == null ? "Executed successfully with no objects returned" : ("Executed " + (errored ? "and errored: " : "successfully and returned: ") + result.toString())).setFooter("Asked by: " + event.getAuthor().getName(), null).build()).queue();
        }

        @Override
        public MessageEmbed help(GuildMessageReceivedEvent event) {
            return helpEmbed(event, "Eval cmd").setDescription("**Evaluates stuff (A: js/bsh)**").build();
        }
    });
}