From f22a0633d08e38ac4bf92b5165a708e11b4d6598 Mon Sep 17 00:00:00 2001
From: James Moger <james.moger@gitblit.com>
Date: Wed, 03 Oct 2012 17:31:37 -0400
Subject: [PATCH] Implemented support for toggling User.canFork in Manager

---
 src/com/gitblit/utils/StringUtils.java |  105 ++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 100 insertions(+), 5 deletions(-)

diff --git a/src/com/gitblit/utils/StringUtils.java b/src/com/gitblit/utils/StringUtils.java
index baed5f0..0711338 100644
--- a/src/com/gitblit/utils/StringUtils.java
+++ b/src/com/gitblit/utils/StringUtils.java
@@ -15,6 +15,7 @@
  */
 package com.gitblit.utils;
 
+import java.io.ByteArrayOutputStream;
 import java.io.UnsupportedEncodingException;
 import java.nio.ByteBuffer;
 import java.nio.CharBuffer;
@@ -33,6 +34,8 @@
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 import java.util.regex.PatternSyntaxException;
 
 /**
@@ -76,7 +79,7 @@
 	 * @return plain text escaped for html
 	 */
 	public static String escapeForHtml(String inStr, boolean changeSpace) {
-		StringBuffer retStr = new StringBuffer();
+		StringBuilder retStr = new StringBuilder();
 		int i = 0;
 		while (i < inStr.length()) {
 			if (inStr.charAt(i) == '&') {
@@ -117,7 +120,7 @@
 	 * @return properly escaped url
 	 */
 	public static String encodeURL(String inStr) {
-		StringBuffer retStr = new StringBuffer();
+		StringBuilder retStr = new StringBuilder();
 		int i = 0;
 		while (i < inStr.length()) {
 			if (inStr.charAt(i) == '/') {
@@ -364,7 +367,7 @@
 	 * @return the first invalid character found or null if string is acceptable
 	 */
 	public static Character findInvalidCharacter(String name) {
-		char[] validChars = { '/', '.', '_', '-' };
+		char[] validChars = { '/', '.', '_', '-', '~' };
 		for (char c : name.toCharArray()) {
 			if (!Character.isLetterOrDigit(c)) {
 				boolean ok = false;
@@ -575,13 +578,15 @@
 		if (!ArrayUtils.isEmpty(charsets)) {
 			sets.addAll(Arrays.asList(charsets));
 		}
+		String value = null;
 		sets.addAll(Arrays.asList("UTF-8", "ISO-8859-1", Charset.defaultCharset().name()));
 		for (String charset : sets) {
 			try {
 				Charset cs = Charset.forName(charset);
 				CharsetDecoder decoder = cs.newDecoder();
 				CharBuffer buffer = decoder.decode(ByteBuffer.wrap(content));
-				return buffer.toString();
+				value = buffer.toString();
+				break;
 			} catch (CharacterCodingException e) {
 				// ignore and advance to the next charset
 			} catch (IllegalCharsetNameException e) {
@@ -590,6 +595,96 @@
 				// ignore unsupported charsets
 			}
 		}
-		return new String(content, Charset.forName("UTF-8"));
+		if (value.startsWith("\uFEFF")) {
+			// strip UTF-8 BOM
+            return value.substring(1);
+        }
+		return value;
+	}
+	
+	/**
+	 * Attempt to extract a repository name from a given url using regular
+	 * expressions.  If no match is made, then return whatever trails after
+	 * the final / character.
+	 * 
+	 * @param regexUrls
+	 * @return a repository path
+	 */
+	public static String extractRepositoryPath(String url, String... urlpatterns) {
+		for (String urlPattern : urlpatterns) {
+			Pattern p = Pattern.compile(urlPattern);
+			Matcher m = p.matcher(url);
+			while (m.find()) {
+				String repositoryPath = m.group(1);
+				return repositoryPath;
+			}
+		}
+		// last resort
+		if (url.lastIndexOf('/') > -1) {
+			return url.substring(url.lastIndexOf('/') + 1);
+		}
+		return url;
+	}
+	
+	/**
+	 * Converts a string with \nnn sequences into a UTF-8 encoded string.
+	 * @param input
+	 * @return
+	 */
+	public static String convertOctal(String input) {
+		try {
+			ByteArrayOutputStream bytes = new ByteArrayOutputStream();
+			Pattern p = Pattern.compile("(\\\\\\d{3})");
+			Matcher m = p.matcher(input);
+			int i = 0;
+			while (m.find()) {
+				bytes.write(input.substring(i, m.start()).getBytes("UTF-8"));
+				// replace octal encoded value
+				// strip leading \ character
+				String oct = m.group().substring(1);
+				bytes.write(Integer.parseInt(oct, 8));
+				i = m.end();			
+			}
+			if (bytes.size() == 0) {
+				// no octal matches
+				return input;
+			} else {
+				if (i < input.length()) {
+					// add remainder of string
+					bytes.write(input.substring(i).getBytes("UTF-8"));
+				}
+			}
+			return bytes.toString("UTF-8");
+		} catch (Exception e) {
+			e.printStackTrace();
+		}
+		return input;
+	}
+	
+	/**
+	 * Returns the first path element of a path string.  If no path separator is
+	 * found in the path, an empty string is returned. 
+	 * 
+	 * @param path
+	 * @return the first element in the path
+	 */
+	public static String getFirstPathElement(String path) {
+		if (path.indexOf('/') > -1) {
+			return path.substring(0, path.indexOf('/')).trim();
+		}
+		return "";
+	}
+	
+	/**
+	 * Returns the last path element of a path string
+	 * 
+	 * @param path
+	 * @return the last element in the path
+	 */
+	public static String getLastPathElement(String path) {
+		if (path.indexOf('/') > -1) {
+			return path.substring(path.lastIndexOf('/') + 1);
+		}
+		return path;
 	}
 }
\ No newline at end of file

--
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