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/*
 * Copyright (c) 2018, vindell (https://github.com/vindell).
 *
 * 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 org.pf4j.spring.boot.ext.task;

import java.util.List;
import java.util.TimerTask;

import org.pf4j.PluginException;
import org.pf4j.PluginManager;
import org.pf4j.update.PluginInfo;
import org.pf4j.update.UpdateManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class PluginUpdateTask extends TimerTask {

	private Logger logger = LoggerFactory.getLogger(PluginUpdateTask.class);
	private PluginManager pluginManager = null;
	private UpdateManager updateManager = null;
	
	public PluginUpdateTask(PluginManager pluginManager, UpdateManager updateManager) {
		super();
		this.pluginManager = pluginManager;
		this.updateManager = updateManager;
	}

	@Override
	public void run() {
		

		// >> keep system up-to-date <<
	    boolean systemUpToDate = true;
	    
	    // check for updates
	    if (updateManager.hasUpdates()) {
	        List updates = updateManager.getUpdates();
	        logger.debug("Found {} updates", updates.size());
	        for (PluginInfo plugin : updates) {
	        	
	        	logger.debug("Found update for plugin '{}'", plugin.id);
	            PluginInfo.PluginRelease lastRelease = plugin.getLastRelease(pluginManager.getSystemVersion(), pluginManager.getVersionManager());
	            String lastVersion = lastRelease.version;
	            String installedVersion = pluginManager.getPlugin(plugin.id).getDescriptor().getVersion();
	            logger.debug("Update plugin '{}' from version {} to version {}", plugin.id, installedVersion, lastVersion);
				try {
					boolean updated = updateManager.updatePlugin(plugin.id, lastVersion);
					if (updated) {
		            	logger.debug("Updated plugin '{}'", plugin.id);
		            } else {
		            	logger.error("Cannot update plugin '{}'", plugin.id);
		                systemUpToDate = false;
		            }
				} catch (PluginException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
	            
	        }
	    } else {
	    	logger.debug("No updates found");
	    }

	    // Check for available (new) plugins
	    if (updateManager.hasAvailablePlugins()) {
	        List availablePlugins = updateManager.getAvailablePlugins();
	        logger.debug("Found {} available plugins", availablePlugins.size());
	        for (PluginInfo plugin : availablePlugins) {
	        	logger.debug("Found available plugin '{}'", plugin.id);
	        	PluginInfo.PluginRelease lastRelease = plugin.getLastRelease(pluginManager.getSystemVersion(), pluginManager.getVersionManager());
	            String lastVersion = lastRelease.version;
	            logger.debug("Install plugin '{}' with version {}", plugin.id, lastVersion);
	            try {
		            boolean installed = updateManager.installPlugin(plugin.id, lastVersion);
		            if (installed) {
		            	logger.debug("Installed plugin '{}'", plugin.id);
		            } else {
		            	logger.error("Cannot install plugin '{}'", plugin.id);
		                systemUpToDate = false;
		            }
	            } catch (PluginException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
	        }
	    } else {
	    	logger.debug("No available plugins found");
	    }

	    if (systemUpToDate) {
	    	logger.debug("System up-to-date");
	    }

	}

}