br.com.thiagomoreira.liferay.plugins.MarkdownDisplayPortlet.java Source code

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Here is the source code for br.com.thiagomoreira.liferay.plugins.MarkdownDisplayPortlet.java

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/**
 * Copyright (C) 2015 Thiago Moreira (tmoreira2020@gmail.com)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package br.com.thiagomoreira.liferay.plugins;

import java.io.IOException;
import java.io.Serializable;

import javax.portlet.PortletException;
import javax.portlet.PortletPreferences;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;

import org.pegdown.Extensions;
import org.pegdown.PegDownProcessor;

import com.liferay.portal.kernel.cache.PortalCache;
import com.liferay.portal.kernel.cache.SingleVMPoolUtil;
import com.liferay.portal.kernel.util.GetterUtil;
import com.liferay.portal.kernel.util.HttpUtil;
import com.liferay.portal.kernel.util.Validator;
import com.liferay.portal.kernel.util.WebKeys;
import com.liferay.util.bridges.mvc.MVCPortlet;

public class MarkdownDisplayPortlet extends MVCPortlet {

    @Override
    public void render(RenderRequest request, RenderResponse response) throws PortletException, IOException {

        PortletPreferences preferences = request.getPreferences();
        String markdownURL = preferences.getValue("markdownURL", null);
        int timeToLive = 60 * GetterUtil.getInteger(preferences.getValue("timeToLive", "1"));
        boolean autolinks = GetterUtil.getBoolean(preferences.getValue("autolinks", "false"));
        boolean fencedBlockCodes = GetterUtil.getBoolean(preferences.getValue("fencedBlockCodes", "false"));
        boolean tables = GetterUtil.getBoolean(preferences.getValue("tables", "false"));

        if (Validator.isNotNull(markdownURL)) {
            PortalCache<Serializable, Object> portalCache = SingleVMPoolUtil
                    .getCache(MarkdownDisplayPortlet.class.getName());

            String content = (String) portalCache.get(markdownURL);

            if (content == null) {
                int options = Extensions.NONE;
                if (autolinks) {
                    options = options | Extensions.AUTOLINKS;
                }
                if (fencedBlockCodes) {
                    options = options | Extensions.FENCED_CODE_BLOCKS;
                }
                if (tables) {
                    options = options | Extensions.TABLES;
                }

                PegDownProcessor processor = new PegDownProcessor(options);

                String markdownSource = HttpUtil.URLtoString(markdownURL);
                content = processor.markdownToHtml(markdownSource);

                portalCache.put(markdownURL, content, timeToLive);
            }

            request.setAttribute("content", content);
        } else {
            request.setAttribute(WebKeys.PORTLET_CONFIGURATOR_VISIBILITY, Boolean.TRUE);
        }

        super.render(request, response);
    }
}