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1   /*
2    * FCKeditor - The text editor for Internet - http://www.fckeditor.net
3    * Copyright (C) 2004-2009 Frederico Caldeira Knabben
4    * 
5    * == BEGIN LICENSE ==
6    * 
7    * Licensed under the terms of any of the following licenses at your
8    * choice:
9    * 
10   *  - GNU General Public License Version 2 or later (the "GPL")
11   *    http://www.gnu.org/licenses/gpl.html
12   * 
13   *  - GNU Lesser General Public License Version 2.1 or later (the "LGPL")
14   *    http://www.gnu.org/licenses/lgpl.html
15   * 
16   *  - Mozilla Public License Version 1.1 or later (the "MPL")
17   *    http://www.mozilla.org/MPL/MPL-1.1.html
18   * 
19   * == END LICENSE ==
20   */
21  package net.fckeditor.tags;
22  
23  import java.io.IOException;
24  import java.util.HashSet;
25  import java.util.Set;
26  
27  import javax.servlet.http.HttpServletRequest;
28  import javax.servlet.jsp.JspException;
29  import javax.servlet.jsp.JspTagException;
30  import javax.servlet.jsp.JspWriter;
31  import javax.servlet.jsp.tagext.TagSupport;
32  
33  /*import org.slf4j.Logger;
34   import org.slf4j.LoggerFactory;*/
35  
36  import net.fckeditor.handlers.RequestCycleHandler;
37  import net.fckeditor.localization.LocalizedMessages;
38  import net.fckeditor.tool.Compatibility;
39  
40  /**
41   * Displays information about browser and user capabilities.
42   * <p>
43   * There are four available commands:
44   * <ol>
45   * <li><code>CompatibleBrowser</code></li>
46   * <li><code>CreateFolder</code></li>
47   * <li><code>FileUpload</code></li>
48   * <li><code>GetResources</code></li>
49   * </ol>
50   * </p>
51   * Each call will emit a localized message (if available) about the command's
52   * status.
53   * 
54   * @version $Id: CheckTag.java 3759 2009-06-22 20:02:26Z mosipov $
55   */
56  public class CheckTag extends TagSupport {
57  
58  	private static final long serialVersionUID = -6834095891675681686L;
59  
60  	private static final String FILE_UPLOAD = "FileUpload";
61  	@Deprecated
62  	private static final String FILE_BROWSING = "FileBrowsing";
63  	private static final String GET_RESOURCES = "GetResources";
64  	@Deprecated
65  	private static final String FOLDER_CREATION = "FolderCreation";
66  	private static final String CREATE_FOLDER = "CreateFolder";
67  	private static final String COMPATIBLE_BROWSER = "CompatibleBrowser";
68  
69  	private static final Set<String> commands = new HashSet<String>(6);
70  
71  	static {
72  		commands.add(FILE_UPLOAD);
73  		commands.add(FILE_BROWSING);
74  		commands.add(FOLDER_CREATION);
75  		commands.add(COMPATIBLE_BROWSER);
76  		commands.add(GET_RESOURCES);
77  		commands.add(CREATE_FOLDER);
78  	}
79  
80  	private String command;
81  
82  	/**
83  	 * Sets the desired command.
84  	 * 
85  	 * @param command
86  	 *            a command to check
87  	 * @throws JspTagException
88  	 *             if the provided command does not exist
89  	 */
90  	public void setCommand(String command) throws JspTagException {
91  		if (!commands.contains(command))
92  			throw new JspTagException(
93  					"You have to provide one of the following commands: "
94  							+ commands);
95  		this.command = command;
96  	}
97  
98  	@Override
99  	public int doStartTag() throws JspException {
100 		JspWriter out = pageContext.getOut();
101 
102 		HttpServletRequest request = (HttpServletRequest) pageContext
103 				.getRequest();
104 		LocalizedMessages lm = LocalizedMessages.getInstance(request);
105 		String response = null;
106 
107 		if (command.equals(FILE_UPLOAD)) {
108 			if (RequestCycleHandler.isEnabledForFileUpload(request))
109 				response = lm.getFileUploadEnabled();
110 			else
111 				response = lm.getFileUploadDisabled();
112 		}
113 
114 		if (command.equals(FILE_BROWSING) || command.equals(GET_RESOURCES)) {
115 			if (RequestCycleHandler.isEnabledForFileBrowsing(request))
116 				response = lm.getGetResourcesEnabled();
117 			else
118 				response = lm.getGetResourcesDisabled();
119 		}
120 
121 		if (command.equals(FOLDER_CREATION) || command.equals(CREATE_FOLDER)) {
122 			if (RequestCycleHandler.isCreateFolderEnabled(request))
123 				response = lm.getCreateFolderEnabled();
124 			else
125 				response = lm.getCreateFolderDisabled();
126 		}
127 
128 		if (command.equals(COMPATIBLE_BROWSER)) {
129 			if (Compatibility.isCompatibleBrowser(request))
130 				response = lm.getCompatibleBrowserYes();
131 			else
132 				response = lm.getCompatibleBrowserNo();
133 		}
134 
135 		try {
136 			out.print(response);
137 		} catch (IOException e) {
138 			throw new JspException(
139 					"Tag response could not be written to the user!", e);
140 		}
141 
142 		return SKIP_BODY;
143 	}
144 
145 }