com.callidusrobotics.irc.scheduler.ScriptJob.java Source code

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Here is the source code for com.callidusrobotics.irc.scheduler.ScriptJob.java

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/**
 * Copyright (C) 2013-2015 Rusty Gerard
 *
 * 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.callidusrobotics.irc.scheduler;

import groovy.lang.Binding;
import groovy.util.GroovyScriptEngine;
import groovy.util.ResourceException;
import groovy.util.ScriptException;

import java.io.IOException;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;

import org.apache.commons.lang3.StringUtils;
import org.quartz.JobExecutionContext;
import org.quartz.JobExecutionException;

import com.callidusrobotics.irc.NaNoBot;

public class ScriptJob extends AbstractJob {

    public static final String SCRIPT_KEY = "SCRIPT";
    private static final String[] ROOTS = new String[] { "./scripts" };

    protected String script;
    protected GroovyScriptEngine gse;

    public ScriptJob() {
        try {
            gse = new GroovyScriptEngine(ROOTS);
        } catch (IOException e) {
            e.printStackTrace();
            gse = null;
        }
    }

    @Override
    public void executeDelegate(JobExecutionContext context) throws JobExecutionException {
        if (gse == null) {
            return;
        }

        script = data.getString(SCRIPT_KEY);
        System.out.println("executing script '" + script + "'...");

        // Set each property as a variable binding for the script engine
        Binding binding = new Binding();
        Properties properties = bot.getProperties();
        for (Entry<Object, Object> entry : properties.entrySet()) {
            String key = (String) entry.getKey();
            String value = (String) entry.getValue();

            binding.setVariable(key, value);
        }

        // Add the list of users in the channel as a variable binding for the script engine
        binding.setVariable("USERS", bot.getUsers());

        // Add the bot's version as a variable binding for the script engine
        binding.setVariable("VERSION", NaNoBot.getImplementationVersion());

        try {
            gse.run(script, binding);
        } catch (ResourceException | ScriptException e) {
            throw new JobExecutionException(e);
        }

        // Persist the variable bindings back into the bot's properties
        @SuppressWarnings("unchecked")
        Map<Object, Object> bindingVariables = (Map<Object, Object>) binding.getVariables();
        for (Entry<Object, Object> entry : bindingVariables.entrySet()) {
            String key = (String) entry.getKey();

            if (key.equals("MESSAGE") || key.equals("USERS") || key.equals("VERSION") || key.startsWith("_")) {
                continue;
            }

            String value = entry.getValue() == null ? "" : entry.getValue().toString();
            bot.getProperties().setProperty(key, value);
        }

        // Send the script's message to the channel
        if (binding.hasVariable("MESSAGE")) {
            String message = (String) binding.getVariable("MESSAGE");
            if (!StringUtils.isBlank(message)) {
                bot.sendMessageToChannel(message);
            }
        }
    }
}