From 5d18f62236a3771c4efa05d96c2851b95366a7dd Mon Sep 17 00:00:00 2001
From: =?utf8?q?David=20=E2=80=98Bombe=E2=80=99=20Roden?=
 <bombe@pterodactylus.net>
Date: Sun, 16 Jan 2011 20:35:36 +0100
Subject: [PATCH] Add filter that replaces a zero date with a translated text.

This is needed for #20.
---
 .../sone/template/UnknownDateFilter.java           | 66 ++++++++++++++++++++++
 .../net/pterodactylus/sone/web/WebInterface.java   |  2 +
 2 files changed, 68 insertions(+)
 create mode 100644 src/main/java/net/pterodactylus/sone/template/UnknownDateFilter.java

diff --git a/src/main/java/net/pterodactylus/sone/template/UnknownDateFilter.java b/src/main/java/net/pterodactylus/sone/template/UnknownDateFilter.java
new file mode 100644
index 0000000..4fc95f7
--- /dev/null
+++ b/src/main/java/net/pterodactylus/sone/template/UnknownDateFilter.java
@@ -0,0 +1,66 @@
+/*
+ * Sone - UnknownDateFilter.java - Copyright © 2011 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.sone.template;
+
+import java.util.Map;
+
+import net.pterodactylus.util.template.DataProvider;
+import net.pterodactylus.util.template.Filter;
+import freenet.l10n.BaseL10n;
+
+/**
+ * {@link Filter} implementation that replaces a {@link Long} with a value of
+ * {@code 0} by a {@link String} from an {@link BaseL10n l10n handler}.
+ *
+ * @author <a href="mailto:bombe@pterodactylus.net">David ‘Bombe’ Roden</a>
+ */
+public class UnknownDateFilter implements Filter {
+
+	/** The l10n handler. */
+	private BaseL10n l10nHandler;
+
+	/** The key for the text to show. */
+	private final String unknownKey;
+
+	/**
+	 * Creates a new unknown date filter.
+	 *
+	 * @param l10nHandler
+	 *            The l10n handler
+	 * @param unknownKey
+	 *            The key of the text to show
+	 */
+	public UnknownDateFilter(BaseL10n l10nHandler, String unknownKey) {
+		this.l10nHandler = l10nHandler;
+		this.unknownKey = unknownKey;
+	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	@Override
+	public Object format(DataProvider dataProvider, Object data, Map<String, String> parameters) {
+		if (data instanceof Long) {
+			if ((Long) data == 0) {
+				return l10nHandler.getString(unknownKey);
+			}
+		}
+		return data;
+	}
+
+}
diff --git a/src/main/java/net/pterodactylus/sone/web/WebInterface.java b/src/main/java/net/pterodactylus/sone/web/WebInterface.java
index 8eb35e3..d08cc17 100644
--- a/src/main/java/net/pterodactylus/sone/web/WebInterface.java
+++ b/src/main/java/net/pterodactylus/sone/web/WebInterface.java
@@ -57,6 +57,7 @@ import net.pterodactylus.sone.template.RequestChangeFilter;
 import net.pterodactylus.sone.template.SoneAccessor;
 import net.pterodactylus.sone.template.SubstringFilter;
 import net.pterodactylus.sone.template.TrustAccessor;
+import net.pterodactylus.sone.template.UnknownDateFilter;
 import net.pterodactylus.sone.web.ajax.CreatePostAjaxPage;
 import net.pterodactylus.sone.web.ajax.CreateReplyAjaxPage;
 import net.pterodactylus.sone.web.ajax.DeletePostAjaxPage;
@@ -184,6 +185,7 @@ public class WebInterface implements CoreListener {
 		templateFactory.addFilter("css", new CssClassNameFilter());
 		templateFactory.addFilter("js", new JavascriptFilter());
 		templateFactory.addFilter("parse", new ParserFilter(templateFactory));
+		templateFactory.addFilter("unknown", new UnknownDateFilter(getL10n(), "View.Sone.Text.UnknownDate"));
 		templateFactory.addPlugin("getpage", new GetPagePlugin());
 		templateFactory.addPlugin("paginate", new PaginationPlugin());
 		templateFactory.setTemplateProvider(new ClassPathTemplateProvider(templateFactory));
-- 
2.7.4