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OpenSearchServer is a powerful, enterprise-class, search engine program. Using the web user interface, the crawlers (web, file, database, ...) and the REST/RESTFul API you will be able to integrate quickly and easily advanced full-text search capabilities in your application. OpenSearchServer runs on Windows and Linux/Unix/BSD.
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/**   
 * License Agreement for OpenSearchServer
 *
 * Copyright (C) 2008-2013 Emmanuel Keller / Jaeksoft
 * 
 * http://www.open-search-server.com
 * 
 * This file is part of OpenSearchServer.
 *
 * OpenSearchServer 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.
 *
 * OpenSearchServer 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 OpenSearchServer. 
 *  If not, see .
 **/

package com.jaeksoft.searchlib.web.controller.runtime;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;

import org.zkoss.bind.annotation.AfterCompose;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.NotifyChange;
import org.zkoss.zul.Messagebox;

import com.jaeksoft.searchlib.Client;
import com.jaeksoft.searchlib.ClientCatalog;
import com.jaeksoft.searchlib.ClientCatalogItem;
import com.jaeksoft.searchlib.SearchLibException;
import com.jaeksoft.searchlib.scheduler.TaskItem;
import com.jaeksoft.searchlib.scheduler.TaskManager;
import com.jaeksoft.searchlib.scheduler.task.TaskDeleteAll;
import com.jaeksoft.searchlib.web.controller.AlertController;
import com.jaeksoft.searchlib.web.controller.CommonController;
import com.jaeksoft.searchlib.webservice.command.CommandImpl;

@AfterCompose(superclass = true)
public class CommandsController extends CommonController {

	private TaskItem taskTruncate = null;

	private class DeleteAlert extends AlertController {

		protected DeleteAlert() throws InterruptedException {
			super("Please, confirm that you want to delete all the documents in the main index",
					Messagebox.YES | Messagebox.NO, Messagebox.QUESTION);
		}

		@Override
		protected void onYes() throws SearchLibException, InterruptedException {
			Client client = getClient();
			if (client == null)
				return;
			if (isRunningTruncate())
				throw new SearchLibException("Truncation is already running.");
			taskTruncate = new TaskItem(client, new TaskDeleteAll());
			TaskManager.executeTask(client, taskTruncate, null);
			reload();
		}
	}

	public boolean isRunningTruncate() {
		if (taskTruncate == null)
			return false;
		if (taskTruncate.isRunning())
			return true;
		if (taskTruncate.getLastExecution() == null)
			return true;
		taskTruncate = null;
		return false;
	}

	public boolean isTaskRunning() throws SearchLibException {
		return isRunningTruncate();
	}

	public CommandsController() throws SearchLibException {
		super();
	}

	@Override
	public void reset() throws SearchLibException {
		isTaskRunning();
	}

	@Command
	@NotifyChange("*")
	public void onReloadClient() throws SearchLibException {
		synchronized (this) {
			getClient().reload();
		}
	}

	@Command
	@NotifyChange("*")
	public void onTimer() throws SearchLibException {
	}

	@Command
	@NotifyChange("*")
	public void onOnline() throws SearchLibException {
		synchronized (this) {
			getClient().setOnline(true);
		}
	}

	@Command
	@NotifyChange("*")
	public void onOffline() throws SearchLibException {
		synchronized (this) {
			getClient().setOnline(false);
		}
	}

	@Command
	@NotifyChange("*")
	public void onClose() throws SearchLibException {
		synchronized (this) {
			Client client = getClient();
			if (client == null)
				return;
			ClientCatalog.closeIndex(client.getIndexName());
		}
	}

	public String getOnlineStatus() throws SearchLibException {
		synchronized (this) {
			Client client = getClient();
			if (client == null)
				return null;
			return client.isOnline() ? "Online" : "Offline";
		}
	}

	public boolean isOnline() throws SearchLibException {
		synchronized (this) {
			Client client = getClient();
			if (client == null)
				return false;
			return client.isOnline();
		}
	}

	public boolean isOffline() throws SearchLibException {
		return !isOnline();
	}

	public String getDocumentNumber() throws SearchLibException, IOException {
		synchronized (this) {
			Client client = getClient();
			if (client == null)
				return null;
			if (!client.isOnline())
				return "Unknown";
			return client.getStatistics().getNumDocs() + " document(s).";
		}
	}

	@Command
	public void onDeleteAll() throws InterruptedException {
		synchronized (this) {
			new DeleteAlert();
		}
	}

	public List getIndexList() throws SearchLibException {
		synchronized (this) {
			Client client = getClient();
			if (client == null)
				return null;
			List list = new ArrayList(0);
			String currentName = client.getIndexName();
			for (ClientCatalogItem item : ClientCatalog.getClientCatalog(getLoggedUser())) {
				String v = item.getIndexName();
				if (!v.equals(currentName))
					list.add(v);
			}
			return list;
		}
	}

	public String getReloadXmlApi() throws UnsupportedEncodingException, SearchLibException {
		return CommandImpl.getReloadXML(getLoggedUser(), getClient());
	}

	public String getReloadJsonApi() throws UnsupportedEncodingException, SearchLibException {
		return CommandImpl.getReloadJSON(getLoggedUser(), getClient());
	}

	public String getOnlineXmlApi() throws UnsupportedEncodingException, SearchLibException {
		return CommandImpl.getOnlineXML(getLoggedUser(), getClient());
	}

	public String getOnlineJsonApi() throws UnsupportedEncodingException, SearchLibException {
		return CommandImpl.getOnlineJSON(getLoggedUser(), getClient());
	}

	public String getOfflineXmlApi() throws UnsupportedEncodingException, SearchLibException {
		return CommandImpl.getOfflineXML(getLoggedUser(), getClient());
	}

	public String getOfflineJsonApi() throws UnsupportedEncodingException, SearchLibException {
		return CommandImpl.getOfflineJSON(getLoggedUser(), getClient());
	}

	public String getTruncateXmlApi() throws UnsupportedEncodingException, SearchLibException {
		return CommandImpl.getTruncateXML(getLoggedUser(), getClient());
	}

	public String getTruncateJsonApi() throws UnsupportedEncodingException, SearchLibException {
		return CommandImpl.getTruncateJSON(getLoggedUser(), getClient());
	}

}