From 02119875d182c4c2bb29aef75971c8de0b5f28a8 Mon Sep 17 00:00:00 2001
From: James Moger <james.moger@gitblit.com>
Date: Fri, 28 Feb 2014 15:21:03 -0500
Subject: [PATCH] Add simplified transformGFM method to MarkdownUtils

---
 .../java/com/gitblit/utils/MarkdownUtils.java | 45 +++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/src/main/java/com/gitblit/utils/MarkdownUtils.java b/src/main/java/com/gitblit/utils/MarkdownUtils.java
index 11a5e340..2ce6f566 100644
--- a/src/main/java/com/gitblit/utils/MarkdownUtils.java
+++ b/src/main/java/com/gitblit/utils/MarkdownUtils.java
@@ -21,11 +21,15 @@ import static org.pegdown.Extensions.SMARTYPANTS;
 import java.io.IOException;
 import java.io.Reader;
 import java.io.StringWriter;
+import java.text.MessageFormat;
 
 import org.apache.commons.io.IOUtils;
 import org.pegdown.LinkRenderer;
 import org.pegdown.PegDownProcessor;
 
+import com.gitblit.IStoredSettings;
+import com.gitblit.Keys;
+
 /**
  * Utility methods for transforming raw markdown text to html.
  *
@@ -96,4 +100,45 @@ public class MarkdownUtils {
 			}
 		}
 	}
+
+
+	/**
+	 * Transforms GFM (Github Flavored Markdown) to html.
+	 * Gitblit does not support the complete GFM specification.
+	 *
+	 * @param input
+	 * @param repositoryName
+	 * @return html
+	 */
+	public static String transformGFM(IStoredSettings settings, String input, String repositoryName) {
+		String text = input;
+
+		// strikethrough
+		text = text.replaceAll("~~(.*)~~", "<s>$1</s>");
+		text = text.replaceAll("\\{(?:-){2}(.*)(?:-){2}}", "<s>$1</s>");
+
+		// underline
+		text = text.replaceAll("\\{(?:\\+){2}(.*)(?:\\+){2}}", "<u>$1</u>");
+
+		// strikethrough, replacement
+		text = text.replaceAll("\\{~~(.*)~>(.*)~~}", "<s>$1</s><u>$2</u>");
+
+		// highlight
+		text = text.replaceAll("\\{==(.*)==}", "<span class='highlight'>$1</span>");
+
+		String canonicalUrl = settings.getString(Keys.web.canonicalUrl, "https://localhost:8443");
+
+		// emphasize and link mentions
+		String mentionReplacement = String.format(" **<a href=\"%1s/user/$1\">@$1</a>**", canonicalUrl);
+		text = text.replaceAll("\\s@([A-Za-z0-9-_]+)", mentionReplacement);
+
+		// link commit shas
+		int shaLen = settings.getInteger(Keys.web.shortCommitIdLength, 6);
+		String commitPattern = MessageFormat.format("\\s([A-Fa-f0-9]'{'{0}'}')([A-Fa-f0-9]'{'{1}'}')", shaLen, 40 - shaLen);
+		String commitReplacement = String.format(" <a class='commit' href='%1$s/commit?r=%2$s&h=$1$2'>$1</a>", canonicalUrl, repositoryName);
+		text = text.replaceAll(commitPattern, commitReplacement);
+
+		String html = transformMarkdown(text);
+		return html;
+	}
 }
-- 
2.39.5