From cb96ebd4d6cb9b43fcf9a6bb3e2f335bff243708 Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Wed, 25 Jul 2012 21:05:27 +0200
Subject: [PATCH] Add login page.

---
 .../demoscenemusic/data/DataManager.java           | 16 +++++
 .../demoscenemusic/page/LoginPage.java             | 82 ++++++++++++++++++++++
 src/main/resources/templates/login                 | 13 ++++
 src/main/webapp/WEB-INF/web.xml.template           |  4 ++
 4 files changed, 115 insertions(+)
 create mode 100644 src/main/java/net/pterodactylus/demoscenemusic/page/LoginPage.java
 create mode 100644 src/main/resources/templates/login

diff --git a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
index f936ff2..60b8318 100644
--- a/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
+++ b/src/main/java/net/pterodactylus/demoscenemusic/data/DataManager.java
@@ -267,6 +267,22 @@ public class DataManager {
 	}
 
 	/**
+	 * Returns the user with the given name.
+	 *
+	 * @param username
+	 *            The name of the user
+	 * @return The user, or {@code null} if the user does not exist
+	 * @throws DatabaseException
+	 *             if a database error occurs
+	 */
+	public User getUserByName(String username) throws DatabaseException {
+		Query query = new Query(Type.SELECT, "USERS");
+		query.addField(new Field("USERS.*"));
+		query.addWhereClause(new ValueFieldWhereClause(new ValueField("USERS.NAME", new StringParameter(username))));
+		return database.getSingle(query, userCreator);
+	}
+
+	/**
 	 * Returns the user connected with the given OpenID.
 	 *
 	 * @param openId
diff --git a/src/main/java/net/pterodactylus/demoscenemusic/page/LoginPage.java b/src/main/java/net/pterodactylus/demoscenemusic/page/LoginPage.java
new file mode 100644
index 0000000..0c30e28
--- /dev/null
+++ b/src/main/java/net/pterodactylus/demoscenemusic/page/LoginPage.java
@@ -0,0 +1,82 @@
+/*
+ * DemosceneMusic - LoginPage.java - Copyright © 2012 David Roden
+ *
+ * This program 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.
+ *
+ * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package net.pterodactylus.demoscenemusic.page;
+
+import net.pterodactylus.demoscenemusic.core.Core;
+import net.pterodactylus.demoscenemusic.data.User;
+import net.pterodactylus.util.database.DatabaseException;
+import net.pterodactylus.util.template.Template;
+import net.pterodactylus.util.template.TemplateContext;
+import net.pterodactylus.util.template.TemplateContextFactory;
+import net.pterodactylus.util.web.Method;
+import net.pterodactylus.util.web.RedirectException;
+
+/**
+ * Page that lets the user log in with his username and his password.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class LoginPage extends BasePage {
+
+	/**
+	 * Creates a new login page.
+	 *
+	 * @param core
+	 *            The core
+	 * @param templateContextFactory
+	 *            The template context factory
+	 * @param template
+	 *            The template to render
+	 */
+	public LoginPage(Core core, TemplateContextFactory templateContextFactory, Template template) {
+		super(core, templateContextFactory, template, "login");
+	}
+
+	//
+	// BASEPAGE METHODS
+	//
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	protected void processTemplate(TemplateContext templateContext, ServletRequest request) throws RedirectException {
+		super.processTemplate(templateContext, request);
+		if (request.getMethod() == Method.POST) {
+			String username = request.getServletRequest().getParameter("username");
+			String password = request.getServletRequest().getParameter("password");
+			try {
+				User user = getCore().getDataManager().getUserByName(username);
+				if (user == null) {
+					templateContext.set("error", "user-not-found");
+					return;
+				}
+				if (!user.verifyPassword(password)) {
+					templateContext.set("error", "invalid-password");
+					return;
+				}
+				/* credentials okay, log the user in. */
+				request.getServletRequest().getSession().setAttribute("currentUser", user);
+				throw new RedirectException(".");
+			} catch (DatabaseException de1) {
+				throw new RuntimeException("Could not load user from database.", de1);
+			}
+		}
+	}
+
+}
diff --git a/src/main/resources/templates/login b/src/main/resources/templates/login
new file mode 100644
index 0000000..0e28702
--- /dev/null
+++ b/src/main/resources/templates/login
@@ -0,0 +1,13 @@
+<%include include/header title=="Artists">
+
+<h1>Login</h1>
+
+<form action="login" method="post">
+
+	<label>Username: <input type="text" name="username" value=""/></label>
+	<label>Password: <input type="password" name="password" value=""/></label>
+	<button type="submit">Login</button>
+
+</form>
+
+<%include include/footer>
\ No newline at end of file
diff --git a/src/main/webapp/WEB-INF/web.xml.template b/src/main/webapp/WEB-INF/web.xml.template
index 9a726e0..75abb07 100644
--- a/src/main/webapp/WEB-INF/web.xml.template
+++ b/src/main/webapp/WEB-INF/web.xml.template
@@ -40,6 +40,10 @@
 			<param-value>net.pterodactylus.demoscenemusic.page.ArtistsPage</param-value>
 		</init-param>
 		<init-param>
+			<param-name>login</param-name>
+			<param-value>net.pterodactylus.demoscenemusic.page.LoginPage</param-value>
+		</init-param>
+		<init-param>
 			<param-name>openid</param-name>
 			<param-value>net.pterodactylus.demoscenemusic.page.OpenIdPage</param-value>
 		</init-param>
-- 
2.7.4