Implement GlobPath() extension method for comparing glob paths

Author: mythz

src/ServiceStack.Text/StringExtensions.cs

@@ -1070,6 +1070,56 @@ public static bool Glob(this string value, string pattern)
             return value.Length == pos;
         }
 
+        public static bool GlobPath(this string filePath, string pattern)
+        {
+            if (string.IsNullOrEmpty(filePath) || string.IsNullOrEmpty(pattern))
+                return false;
+
+            var sanitizedPath = filePath.Replace('\\','/');
+            if (sanitizedPath[0] == '/')
+                sanitizedPath = sanitizedPath.Substring(1);
+            var sanitizedPattern = pattern.Replace('\\', '/');
+            if (sanitizedPattern[0] == '/')
+                sanitizedPattern = sanitizedPattern.Substring(1);
+
+            if (sanitizedPattern.IndexOf('*') == -1 && sanitizedPattern.IndexOf('?') == -1)
+                return sanitizedPath == sanitizedPattern;
+
+            var patternParts = sanitizedPattern.SplitOnLast('/');
+            var parts = sanitizedPath.SplitOnLast('/');
+            if (parts.Length == 1)
+                return parts[0].Glob(pattern);
+
+            var dirPart = parts[0];
+            var filePart = parts[1];
+            if (patternParts.Length == 1)
+                return filePart.Glob(patternParts[0]);
+
+            var dirPattern = patternParts[0];
+            var filePattern = patternParts[1];
+
+            if (dirPattern.IndexOf("**", StringComparison.Ordinal) >= 0)
+            {
+                if (!dirPart.StartsWith(dirPattern.LeftPart("**").TrimEnd('*')))
+                    return false;
+            }
+            else if (dirPattern.IndexOf('*') >= 0 || dirPattern.IndexOf('?') >= 0)
+            {
+                var regex = new Regex(
+                    "^" + Regex.Escape(dirPattern).Replace(@"\*", "[^\\/]*").Replace(@"\?", ".") + "$"
+                );
+                if (!regex.IsMatch(dirPart))
+                    return false;
+            }
+            else
+            {
+                if (dirPart != dirPattern)
+                    return false;
+            }
+
+            return filePart.Glob(filePattern);
+        }
+
         public static string TrimPrefixes(this string fromString, params string[] prefixes)
         {
             if (string.IsNullOrEmpty(fromString))

tests/ServiceStack.Text.Tests/GlobPathTests.cs

@@ -0,0 +1,48 @@
+using NUnit.Framework;
+using ServiceStack;
+using ServiceStack.Text;
+
+namespace ServiceStack.Text.Tests
+{
+    [TestFixture]
+    public class GlobPathTests
+    {
+        [Test]
+        public void Does_validate_GlobPaths()
+        {
+            Assert.That(!"/dir/a/file.txt".GlobPath(""));
+            Assert.That(!"".GlobPath("*.txt"));
+            Assert.That("file.txt".GlobPath("file.txt"));
+            Assert.That(!"file.txt".GlobPath("file.json"));
+            Assert.That(!"file.txt".GlobPath("*.json"));
+            Assert.That("file.txt".GlobPath("*.txt"));
+
+            Assert.That("/dir/a/file.txt".GlobPath("/dir/a/file.txt"));
+            Assert.That("dir\\a/file.txt".GlobPath("/dir/a/file.txt"));
+            Assert.That("/dir/a/file.txt".GlobPath("dir\\a/file.txt"));
+            Assert.That(!"/dir/a/file.txt".GlobPath("/dir/b/file.txt"));
+            Assert.That(!"/dir/a/file.txt".GlobPath("/dir/a/file2.txt"));
+            Assert.That(!"/dir/a/file.txt".GlobPath("dir\\a/file2.txt"));
+            Assert.That(!"/Dir/a/file.txt".GlobPath("/dir/a/file2.txt"));
+            Assert.That(!"/dir1/a/file.txt".GlobPath("/dir2/a/file2.txt"));
+            Assert.That(!"/dir/a/file.txt".GlobPath("/dir/a/file.json"));
+            Assert.That(!"/dir/a/file.txt".GlobPath("/dir/a/file2.txt"));
+            Assert.That(!"/dir/a/file.txt".GlobPath("/dir/a/file2.*"));
+            Assert.That(!"/dir/a/file.txt".GlobPath("/dir/a/*.json"));
+
+            Assert.That("dir/a/file.txt".GlobPath("dir/*/file.txt"));
+            Assert.That(!"dir/file.txt".GlobPath("dir/*/file.txt"));
+            Assert.That(!"dir/a/b/file.txt".GlobPath("dir/*/file.txt"));
+            Assert.That("dir/ab/file.txt".GlobPath("dir/a*/file.txt"));
+            Assert.That("dir/abc/file.txt".GlobPath("dir/a*/file.txt"));
+            Assert.That("dir/ab/file.txt".GlobPath("dir/a?/file.txt"));
+            Assert.That(!"dir/abc/file.txt".GlobPath("dir/a?/file.txt"));
+            Assert.That("dir/abc/file.txt".GlobPath("dir/a?c/file.txt"));
+
+            Assert.That("dir/a/file.txt".GlobPath("dir/**/file.txt"));
+            Assert.That("dir/a/b/file.txt".GlobPath("dir/**/file.txt"));
+            Assert.That("dir/a/b/c/d/e/file.txt".GlobPath("dir/**/file.txt"));
+            Assert.That("dir/a/b/c/d/e/file.json".GlobPath("dir/**/*.json"));
+        }
+    }
+}

tests/ServiceStack.Text.Tests/ServiceStack.Text.Tests.csproj

@@ -191,6 +191,7 @@
     <Compile Include="EnumerableTests.cs" />
     <Compile Include="AttributeTests.cs" />
     <Compile Include="CsvTypeTests.cs" />
+    <Compile Include="GlobPathTests.cs" />
     <Compile Include="HttpUtilsTests.cs" />
     <Compile Include="Issues\JsConfigIssues.cs" />
     <Compile Include="JsonTests\InheritAbstractTests.cs" />