X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Fnet%2Fpterodactylus%2Fsone%2Fweb%2Fpage%2FTemplatePage.java;h=79dd20863d042a9c0a867c9f3617ceed4d3d98ec;hb=21c4819261de874652e7c8be37bde5923758cf4b;hp=7e478e7250ca7fea451e971a0fbef6a18008a195;hpb=b2bc9337f91c303e2700f001c785e8b14a9990ec;p=Sone.git

diff --git a/src/main/java/net/pterodactylus/sone/web/page/TemplatePage.java b/src/main/java/net/pterodactylus/sone/web/page/TemplatePage.java
index 7e478e7..79dd208 100644
--- a/src/main/java/net/pterodactylus/sone/web/page/TemplatePage.java
+++ b/src/main/java/net/pterodactylus/sone/web/page/TemplatePage.java
@@ -22,6 +22,7 @@ import java.util.Collection;
 import java.util.Collections;
 
 import net.pterodactylus.util.template.Template;
+import freenet.clients.http.LinkEnabledCallback;
 import freenet.clients.http.PageMaker;
 import freenet.clients.http.PageNode;
 import freenet.clients.http.ToadletContext;
@@ -29,16 +30,16 @@ import freenet.l10n.BaseL10n;
 
 /**
  * Base class for all {@link Page}s that are rendered with {@link Template}s.
- * 
+ *
  * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
  */
-public class TemplatePage implements Page {
+public class TemplatePage implements Page, LinkEnabledCallback {
 
 	/** The path of the page. */
 	private final String path;
 
 	/** The template to render. */
-	private final Template template;
+	protected final Template template;
 
 	/** The L10n handler. */
 	private final BaseL10n l10n;
@@ -48,7 +49,7 @@ public class TemplatePage implements Page {
 
 	/**
 	 * Creates a new template page.
-	 * 
+	 *
 	 * @param path
 	 *            The path of the page
 	 * @param template
@@ -89,8 +90,17 @@ public class TemplatePage implements Page {
 		for (String styleSheet : getStyleSheets()) {
 			pageNode.addCustomStyleSheet(styleSheet);
 		}
+		String shortcutIcon = getShortcutIcon();
+		if (shortcutIcon != null) {
+			pageNode.addForwardLink("icon", shortcutIcon);
+		}
+
+		try {
+			processTemplate(request, template);
+		} catch (RedirectException re1) {
+			return new RedirectResponse(re1.getTarget());
+		}
 
-		processTemplate(request, template);
 		StringWriter stringWriter = new StringWriter();
 		template.render(stringWriter);
 		pageNode.content.addChild("%", stringWriter.toString());
@@ -101,7 +111,7 @@ public class TemplatePage implements Page {
 	/**
 	 * Can be overridden to return a custom set of style sheets that are to be
 	 * included in the page’s header.
-	 * 
+	 *
 	 * @return Additional style sheets to load
 	 */
 	protected Collection<String> getStyleSheets() {
@@ -109,22 +119,33 @@ public class TemplatePage implements Page {
 	}
 
 	/**
+	 * Returns the name of the shortcut icon to include in the page’s header.
+	 *
+	 * @return The URL of the shortcut icon, or {@code null} for no icon
+	 */
+	protected String getShortcutIcon() {
+		return null;
+	}
+
+	/**
 	 * Can be overridden when extending classes need to set variables in the
 	 * template before it is rendered.
-	 * 
+	 *
 	 * @param request
 	 *            The request that is rendered
 	 * @param template
 	 *            The template to set variables in
+	 * @throws RedirectException
+	 *             if the processing page wants to redirect after processing
 	 */
-	protected void processTemplate(Request request, Template template) {
+	protected void processTemplate(Request request, Template template) throws RedirectException {
 		/* do nothing. */
 	}
 
 	/**
 	 * Can be overridden to redirect the user to a different page, in case a log
 	 * in is required, or something else is wrong.
-	 * 
+	 *
 	 * @param request
 	 *            The request that is processed
 	 * @return The URL to redirect to, or {@code null} to not redirect
@@ -133,4 +154,50 @@ public class TemplatePage implements Page {
 		return null;
 	}
 
+	//
+	// INTERFACE LinkEnabledCallback
+	//
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public boolean isEnabled(ToadletContext toadletContext) {
+		return true;
+	}
+
+	/**
+	 * Exception that can be thrown to signal that a subclassed {@link Page}
+	 * wants to redirect the user during the
+	 * {@link TemplatePage#processTemplate(net.pterodactylus.sone.web.page.Page.Request, Template)}
+	 * method call.
+	 *
+	 * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+	 */
+	public class RedirectException extends Exception {
+
+		/** The target to redirect to. */
+		private final String target;
+
+		/**
+		 * Creates a new redirect exception.
+		 *
+		 * @param target
+		 *            The target of the redirect
+		 */
+		public RedirectException(String target) {
+			this.target = target;
+		}
+
+		/**
+		 * Returns the target to redirect to.
+		 *
+		 * @return The target to redirect to
+		 */
+		public String getTarget() {
+			return target;
+		}
+
+	}
+
 }