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/*
 * Copyright (C) 2020 Graylog, Inc.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the Server Side Public License, version 1,
 * as published by MongoDB, Inc.
 *
 * 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
 * Server Side Public License for more details.
 *
 * You should have received a copy of the Server Side Public License
 * along with this program. If not, see
 * .
 */
package org.graylog2.bindings.providers;

import com.floreysoft.jmte.Engine;
import com.floreysoft.jmte.Renderer;
import com.google.common.html.HtmlEscapers;

import javax.inject.Inject;
import javax.inject.Provider;
import javax.inject.Singleton;
import java.util.Locale;
import java.util.Map;


@Singleton
public class HtmlSafeJmteEngineProvider implements Provider {
    private final Engine engine;

    @Inject
    public HtmlSafeJmteEngineProvider() {
      engine = Engine.createEngine();
      engine.registerRenderer(String.class, new HtmlSafeRenderer());
    }

    @Override
    public Engine get() {
      return engine;
    }

    private static class HtmlSafeRenderer implements Renderer {
      @Override
      public String render(String value, Locale locale, Map model) {
          return HtmlEscapers.htmlEscaper().escape(value);
      }
    }
}