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jforum example source code file (ViewCommon.java)

This example jforum source code file (ViewCommon.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - jforum tags/keywords

forumexception, integer, integer, io, net, network, requestcontext, simpledateformat, simplehash, string, string, stringbuffer, stringbuffer, text, uri, utf-8, utf-8, util, viewcommon

The jforum ViewCommon.java source code

/*
 * Copyright (c) JForum Team
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met:
 * 
 * 1) Redistributions of source code must retain the above 
 * copyright notice, this list of conditions and the 
 * following  disclaimer.
 * 2)  Redistributions in binary form must reproduce the 
 * above copyright notice, this list of conditions and 
 * the following disclaimer in the documentation and/or 
 * other materials provided with the distribution.
 * 3) Neither the name of "Rafael Steil" nor 
 * the names of its contributors may be used to endorse 
 * or promote products derived from this software without 
 * specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, 
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 
 * IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
 * 
 * This file creation date: 02/04/2004 - 20:31:35
 * The JForum Project
 * http://www.jforum.net
 */
package net.jforum.view.forum.common;

import java.io.UnsupportedEncodingException;
import java.net.URI;
import java.net.URLEncoder;
import java.text.SimpleDateFormat;
import java.util.Date;

import org.apache.commons.lang.StringUtils;

import net.jforum.JForumExecutionContext;
import net.jforum.context.RequestContext;
import net.jforum.entities.User;
import net.jforum.exceptions.ForumException;
import net.jforum.util.preferences.ConfigKeys;
import net.jforum.util.preferences.SystemGlobals;
import net.jforum.util.preferences.TemplateKeys;
import freemarker.template.SimpleHash;

/**
 * @author Rafael Steil
 * @version $Id: ViewCommon.java,v 1.32 2007/09/20 16:07:08 rafaelsteil Exp $
 */
public final class ViewCommon
{
	/**
	 * Prepared the user context to use data pagination. 
	 * The following variables are set to the context:
	 * <p>
	 * 	<ul>
	 * 		<li> totalPages - total number of pages
	 * 		<li> recordsPerPage - how many records will be shown on each page
	 * 		<li> totalRecords - number of records fount
	 * 		<li> thisPage - the current page being shown
	 * 		<li> start - 
	 * 	</ul>
	 * </p>
	 * @param start int
	 * @param totalRecords  int
	 * @param recordsPerPage int
	 */
	public static void contextToPagination(int start, int totalRecords, int recordsPerPage)
	{
		SimpleHash context = JForumExecutionContext.getTemplateContext();
		
		context.put("totalPages", new Double(Math.ceil((double) totalRecords / (double) recordsPerPage)));
		context.put("recordsPerPage", new Integer(recordsPerPage));
		context.put("totalRecords", new Integer(totalRecords));
		context.put("thisPage", new Double(Math.ceil((double) (start + 1) / (double) recordsPerPage)));
		context.put("start", new Integer(start));
	}
	
	/**
	 * Prepares the template context to show the login page, using the current URI as return path.
	 * @return TemplateKeys.USER_LOGIN
	 */
	public static String contextToLogin() 
	{
		RequestContext request = JForumExecutionContext.getRequest();
		
		String uri = request.getRequestURI();
		String query = request.getQueryString();
		String returnPath = query == null ? uri : uri + "?" + query;
		
		return contextToLogin(returnPath);
	}
	
	/**
	 * Prepares the template context to show the login page, using "returnPath" as return path
	 * @param returnPath the URI to use as return path
	 * @return TemplateKeys.USER_LOGIN
	 */
	public static String contextToLogin(String returnPath)
	{
		JForumExecutionContext.getTemplateContext().put("returnPath", returnPath);
		
		if (ConfigKeys.TYPE_SSO.equals(SystemGlobals.getValue(ConfigKeys.AUTHENTICATION_TYPE))) {
			String redirect = SystemGlobals.getValue(ConfigKeys.SSO_REDIRECT);
			
			if (!StringUtils.isEmpty(redirect)) {
				URI redirectUri = URI.create(redirect);
				
				if (!redirectUri.isAbsolute()) {
					throw new ForumException("SSO redirect URL should start with a scheme");
				}
				
				try {
					returnPath = URLEncoder.encode( ViewCommon.getForumLink() + returnPath, "UTF-8");
				}
				catch (UnsupportedEncodingException e) {}
				
				if (redirect.indexOf('?') == -1) {
					redirect += "?";
				}
				else {
					redirect += "&";
				}
				
				redirect += "returnUrl=" + returnPath;
				
				JForumExecutionContext.setRedirect(redirect);
			}
		}
		
		return TemplateKeys.USER_LOGIN;
	}
	
	/**
	 * Returns the initial page to start fetching records from.
	 *   
	 * @return The initial page number
	 */
	public static int getStartPage()
	{
		String s = JForumExecutionContext.getRequest().getParameter("start");
		int start;
		
		if (StringUtils.isEmpty(s)) {
			start = 0;
		}
		else {
			start = Integer.parseInt(s);
			
			if (start < 0) {
				start = 0;
			}
		}
		
		return start;
	}
	
	/**
	 * Gets the forum base link.
	 * The returned link has a trailing slash
	 * @return The forum link, with the trailing slash
	 */
	public static String getForumLink()
	{
		String forumLink = SystemGlobals.getValue(ConfigKeys.FORUM_LINK);
		
		if (forumLink.charAt(forumLink.length() - 1) != '/') {
			forumLink += "/";
		}
		
		return forumLink;
	}
	
	public static String toUtf8String(String s)
	{
		StringBuffer sb = new StringBuffer();
	
		for (int i = 0; i < s.length(); i++) {
			char c = s.charAt(i);
	
			if ((c >= 0) && (c <= 255)) {
				sb.append(c);
			}
			else {
				byte[] b;
	
				try {
					b = Character.toString(c).getBytes("utf-8");
				}
				catch (Exception ex) {
					System.out.println(ex);
					b = new byte[0];
				}
	
				for (int j = 0; j < b.length; j++) {
					int k = b[j];
	
					if (k < 0) {
						k += 256;
					}
	
					sb.append('%').append(Integer.toHexString(k).toUpperCase());
				}
			}
		}
	
		return sb.toString();
	}
	
	/**
	 * Formats a date using the pattern defined in the configuration file.
	 * The key is the value of {@link net.jforum.util.preferences.ConfigKeys.DATE_TIME_FORMAT}
	 * @param date the date to format
	 * @return the string with the formated date
	 */
	public static String formatDate(Date date) 
	{
		SimpleDateFormat df = new SimpleDateFormat(SystemGlobals.getValue(ConfigKeys.DATE_TIME_FORMAT));
		return df.format(date);
	}
	
	/**
	 * Escapes < by &lt; and > by &gt;
	 * @param contents the string to parse
	 * @return the new string
	 */
	public static String espaceHtml(String contents)
	{
		StringBuffer sb = new StringBuffer(contents);
		
		replaceAll(sb, "<", "<");
		replaceAll(sb, ">", ">");
		
		return sb.toString();
	}
	
	/**
	 * Replaces some string with another value
	 * @param sb the StrinbBuilder with the contents to work on
	 * @param what the string to be replaced
	 * @param with the new value
	 * @return the new string
	 */
	public static String replaceAll(StringBuffer sb, String what, String with)
	{
		int pos = sb.indexOf(what);
		
		while (pos > -1) {
			sb.replace(pos, pos + what.length(), with);
			pos = sb.indexOf(what);
		}
		
		return sb.toString();
	}
	
	/**
	 * @see #replaceAll(StringBuffer, String, String)
     * @param contents String
     * @param what String
     * @param with String
     * @return String
	 */
	public static String replaceAll(String contents, String what, String with)
	{
		return replaceAll(new StringBuffer(contents), what, with);
	}

	/**
	 * Parse the user's signature, to make it proper to visualization
	 * @param u the user instance
	 */
	public static void prepareUserSignature(User u)
	{
		if (u.getSignature() != null) {
			StringBuffer sb = new StringBuffer(u.getSignature());
			
			replaceAll(sb, "\n", "<br />");
			
			u.setSignature(sb.toString());
			u.setSignature(PostCommon.prepareTextForDisplayExceptCodeTag(u.getSignature(), true, true));
		}
	}
}

Other jforum examples (source code examples)

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