1 /*
2 * Scope: a generic MVC framework.
3 * Copyright (c) 2000-2002, The Scope team
4 * All rights reserved.
5 *
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 *
18 * Neither the name "Scope" nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR
27 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
29 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
30 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 *
35 *
36 * $Id: LoginAppController.java,v 1.3 2002/09/05 15:41:48 ludovicc Exp $
37 */
38 package samples.servlet.xml.login;
39
40
41 import java.util.HashMap;
42 import org.scopemvc.controller.basic.BasicController;
43 import org.scopemvc.controller.basic.ViewContext;
44 import org.scopemvc.controller.servlet.ScopeServlet;
45 import org.scopemvc.controller.servlet.ServletContext;
46 import org.scopemvc.core.Control;
47 import org.scopemvc.core.ControlException;
48 import org.scopemvc.view.servlet.ServletView;
49
50 /***
51 * <P>
52 *
53 * Top-most application Controller for the Login Sample, creates a child
54 * FormController, but handles the Login process itself so that any child
55 * Controller can do logins by passing a REQUEST_LOGIN Control up the chain of
56 * command. </P>
57 *
58 * @author <A HREF="mailto:smeyfroi@users.sourceforge.net">Steve Meyfroidt</A>
59 * @created 05 September 2002
60 * @version $Revision: 1.3 $ $Date: 2002/09/05 15:41:48 $
61 */
62 public class LoginAppController extends BasicController {
63
64 /***
65 * TODO: describe of the Field
66 */
67 public final static String VALIDATE_LOGIN = "Login";
68
69 private FormController formController;
70
71
72 /***
73 * Constructor for the LoginAppController object
74 */
75 public LoginAppController() {
76 ServletView viewContainer = new ServletView();
77 viewContainer.addPage(new LoginView());
78 setView(viewContainer);
79
80 formController = new FormController();
81 addChild(formController);
82 }
83
84
85 /***
86 * TODO: document the method
87 */
88 public void startup() {
89 formController.handleControl(new Control(FormController.SHOW_FORM));
90 }
91
92
93 /***
94 * Respond to VALIDATE_LOGIN and LoginControls.REQUEST_LOGIN.
95 *
96 * @param inControl TODO: Describe the Parameter
97 * @throws ControlException TODO: Describe the Exception
98 */
99 protected void doHandleControl(Control inControl) throws ControlException {
100 if (inControl.matchesID(VALIDATE_LOGIN)) {
101 doValidateLogin((HashMap) inControl.getParameter());
102 } else if (inControl.matchesID(LoginControls.REQUEST_LOGIN)) {
103 doRequestLogin();
104 }
105 }
106
107
108 /***
109 * TODO: document the method
110 *
111 * @param inParameters TODO: Describe the Parameter
112 */
113 protected void doValidateLogin(HashMap inParameters) {
114
115 // In case we get here directly instead of via a child Controller
116 if (LoginManager.isLoggedIn()) {
117 startup();
118 }
119
120 // Check the credentials
121 String username = (String) inParameters.get("username");
122 String password = (String) inParameters.get("password");
123 if ("Trevor".equals(username) && "Cat".equals(password)) {
124 LoginManager.logIn();
125 HashMap redirect = LoginManager.getRedirect();
126 if (redirect == null) {
127 startup();
128 } else {
129 ScopeServlet.redirect(redirect);
130 }
131 } else {
132 showError("Login", "Unrecognised username/password");
133 }
134 }
135
136
137 /***
138 * TODO: document the method
139 */
140 protected void doRequestLogin() {
141 // In case we get here directly instead of via a child Controller
142 if (LoginManager.isLoggedIn()) {
143 startup();
144 }
145
146 // Store the original request to the child in session so we can redirect back after successful login
147 LoginManager.saveRedirect();
148
149 // Now go to the login screen
150 ((ServletView) getView()).setVisible(LoginView.ID);
151 showView();
152 }
153 }
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