Fix/MultiFile pattern (Issue #696)

src/LogExpert.Core/Classes/Log/RolloverFilenameBuilder.cs

@@ -116,15 +116,23 @@ public string BuildFileName ()
 
         if (_indexGroup != null && _indexGroup.Success)
         {
-            fileName = fileName.Remove(_indexGroup.Index, _indexGroup.Length);
+            var indexPosition = _indexGroup.Index;
+            var indexLength = _indexGroup.Length;
+            if (_condGroup != null && _condGroup.Success)
+            {
+                indexPosition = _condGroup.Index;
+                indexLength += _condGroup.Length;
+            }
+
+            fileName = fileName.Remove(indexPosition, indexLength);
 
             if (!_hideZeroIndex || Index > 0)
             {
                 var format = "D" + _indexGroup.Length;
-                fileName = fileName.Insert(_indexGroup.Index, Index.ToString(format));
+                fileName = fileName.Insert(indexPosition, Index.ToString(format));
                 if (_hideZeroIndex && _condContent != null)
                 {
-                    fileName = fileName.Insert(_indexGroup.Index, _condContent);
+                    fileName = fileName.Insert(indexPosition, _condContent);
                 }
             }
         }
@@ -141,14 +149,14 @@ public string BuildFileName ()
     private void ParseFormatString (string formatString)
     {
         var fmt = EscapeNonvarRegions(formatString);
-        var datePos = formatString.IndexOf("$D(", StringComparison.Ordinal);
+        var datePos = fmt.IndexOf("$D(", StringComparison.Ordinal);
 
         if (datePos != -1)
         {
-            var endPos = formatString.IndexOf(')', datePos);
+            var endPos = fmt.IndexOf(')', datePos);
             if (endPos != -1)
             {
-                _dateTimeFormat = formatString.Substring(datePos + 3, endPos - datePos - 3)
+                _dateTimeFormat = fmt.Substring(datePos + 3, endPos - datePos - 3)
                                               .ToUpperInvariant()
                                               .Replace('D', 'd')
                                               .Replace('Y', 'y');
@@ -176,12 +184,15 @@ private void ParseFormatString (string formatString)
             }
         }
 
-        fmt = fmt.Replace("*", ".*", StringComparison.Ordinal);
+        fmt = fmt.Replace("*", ".*?", StringComparison.Ordinal);
         _hideZeroIndex = fmt.Contains("$J", StringComparison.Ordinal);
         fmt = fmt.Replace("$I", "(?'index'[\\d]+)", StringComparison.Ordinal);
-        fmt = fmt.Replace("$J", "(?'index'[\\d]*)", StringComparison.Ordinal);
+        var optionalIndexPattern = _condContent != null
+            ? $"(?:(?'cond'{Regex.Escape(_condContent)})(?'index'[\\d]+)|(?'index'))"
+            : "(?'index'[\\d]*)";
+        fmt = fmt.Replace("$J", optionalIndexPattern, StringComparison.Ordinal);
 
-        _regex = new Regex(fmt);
+        _regex = new Regex(@"\A" + fmt + @"\z");
     }
 
     private string EscapeNonvarRegions (string formatString)
@@ -192,15 +203,20 @@ private string EscapeNonvarRegions (string formatString)
         StringBuilder result = new();
         StringBuilder segment = new();
 
+        void FlushEscaped ()
+        {
+            _ = result.Append(Regex.Escape(segment.ToString()));
+            segment = new StringBuilder();
+        }
+
         for (var i = 0; i < fmt.Length; ++i)
         {
             switch (state)
             {
                 case 0: // looking for $
                     if (fmt[i] == '$')
                     {
-                        _ = result.Append(Regex.Escape(segment.ToString()));
-                        segment = new StringBuilder();
+                        FlushEscaped();
                         state = 1;
                     }
 
@@ -238,9 +254,10 @@ private string EscapeNonvarRegions (string formatString)
             }
         }
 
+        FlushEscaped();
         fmt = result.ToString().Replace('\xFFFD', '*');
         return fmt;
     }
 
     #endregion
-}
+}

src/LogExpert.Resources/Resources.de.resx

@@ -1680,12 +1680,16 @@ Ein ausgewähltes Tool erscheint in der Iconbar. Alle anderen verfügbaren Tools
 		<value>Muster syntax:
 
 * = alle Zeichen (wildcard)
-$D(&amp;lt;date&amp;gt;) = Datumsmuster
+$D(&lt;date&gt;) = Datumsmuster
 $I = Dateiindexnummer
 $J = Dateiindexnummer, versteckt wenn 09
-$J(&amp;lt;prefix&amp;gt;) = Wie $J, jedoch wird ein &amp;lt;prefix&amp;gt; hinzugefügt when es nicht 0 ist
+$J(&lt;prefix&gt;) = Wie $J, jedoch wird ein &lt;prefix&gt; hinzugefügt wenn es nicht 0 ist
 
-&amp;lt;date&amp;gt;:
+Beispiele:
+*$J(.) → app.log, app.log.1, app.log.2
+*$J(.).log → app.log, app.1.log, app.2.log
+
+&lt;date&gt;:
 DD = Tag
 MM = Monat
 YY[YY] = Jahr

src/LogExpert.Resources/Resources.resx

@@ -1743,12 +1743,16 @@ Checked tools will appear in the icon bar. All other tools are available in the
         <value>Pattern syntax:
 
 * = any characters (wildcard)
-$D(&amp;lt;date&amp;gt;) = Date pattern
+$D(&lt;date&gt;) = Date pattern
 $I = File index number
 $J = File index number, hidden when zero
-$J(&amp;lt;prefix&amp;gt;) = Like $J, but adding &amp;lt;prefix&amp;gt; when non-zero
+$J(&lt;prefix&gt;) = Like $J, but adding &lt;prefix&gt; when non-zero
 
-&amp;lt;date&amp;gt;:
+Examples:
+*$J(.) → app.log, app.log.1, app.log.2
+*$J(.).log → app.log, app.1.log, app.2.log
+
+&lt;date&gt;:
 DD = day
 MM = month
 YY[YY] = year

src/LogExpert.Resources/Resources.zh-CN.resx

@@ -1554,6 +1554,10 @@ $I = 文件索引编号
 $J = 文件索引编号，为零时隐藏
 $J(<前缀>) = 类似 $J，但在非零时添加 <前缀>
 
+示例：
+*$J(.) → app.log, app.log.1, app.log.2
+*$J(.).log → app.log, app.1.log, app.2.log
+
 <日期>：
 DD = 日
 MM = 月

src/LogExpert.Tests/LogExpert.Tests.csproj

@@ -112,6 +112,12 @@
     <Content Include="TestData\app.log.1">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+    <Content Include="TestData\app.1.log">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+    <Content Include="TestData\app.2.log">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
     <None Update="TestData\organizations-1000.csv">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </None>

src/LogExpert.Tests/RollingNameTest.cs

@@ -32,6 +32,11 @@ public void TestFilename1(string expectedResult, string formatString)
     [TestCase("engine.log", "engine1.log","engine$J.log")]
     [TestCase("engine1.log", "engine2.log","engine$J.log")]
     [TestCase("engine.log", "engine.log.1","*$J(.)")]
+    [TestCase("engine.log", "engine.1.log", "*$J(.).log")]
+    [TestCase("engine.log.1", "engine.log.2", "*$J(.)")]
+    [TestCase("engine.1.log", "engine.2.log", "*$J(.).log")]
+    [TestCase("engine1.log", "engine2.log", "*$I.log")]
+    [TestCase("engine_2010-06-12.1.log", "engine_2010-06-12.2.log", "*$D(yyyy-MM-dd)$J(.).log")]
     [TestCase("engine_2010-06-12.log", "engine_2010-06-12.log.1", "*$D(yyyy-MM-dd).log$J(.)")]
     public void TestFilenameAnd1(string fileName, string expectedResult, string formatString)
     {
@@ -45,6 +50,7 @@ public void TestFilenameAnd1(string fileName, string expectedResult, string form
     [Test]
     [TestCase("engine.log", "engine.log.2","*$J(.)")]
     [TestCase("engine.log", "engine.log.2","*.log$J(.)")]
+    [TestCase("engine.log", "engine.2.log", "*$J(.).log")]
     public void TestFilenameAnd2(string fileName, string expectedResult, string formatString)
     {
         RolloverFilenameBuilder fnb = new(formatString);
@@ -54,6 +60,16 @@ public void TestFilenameAnd2(string fileName, string expectedResult, string form
         Assert.That(name, Is.EqualTo(expectedResult));
     }
 
+    [Test]
+    public void BuildFileName_DatePatternAfterRegexMetacharacter_IncrementsDate ()
+    {
+        RolloverFilenameBuilder fnb = new("app.$D(yyyy-MM-dd).log");
+        fnb.SetFileName("app.2010-06-12.log");
+
+        fnb.IncrementDate();
+
+        Assert.That(fnb.BuildFileName(), Is.EqualTo("app.2010-06-13.log"));
+    }
 
     [Test]
     [TestCase("engine1.log", "engine.log","engine$J.log")]
@@ -65,4 +81,4 @@ public void TestFilenameMinus1(string fileName, string expectedResult, string fo
         var name = fnb.BuildFileName();
         Assert.That(name, Is.EqualTo("engine.log"));
     }
-}
+}

src/LogExpert.Tests/StreamReaderTests/LogfileReaderMultiFileFlagTests.cs

@@ -26,6 +26,8 @@ public void SetUp ()
 
         File.Copy(Path.Combine(_testDataDirectory, "app.log"), _logFile);
         File.Copy(Path.Combine(_testDataDirectory, "app.log.1"), _logFile + ".1");
+        File.Copy(Path.Combine(_testDataDirectory, "app.1.log"), Path.Combine(_testDirectory, "app.1.log"));
+        File.Copy(Path.Combine(_testDataDirectory, "app.2.log"), Path.Combine(_testDirectory, "app.2.log"));
 
         _ = PluginRegistry.PluginRegistry.Create(_testDirectory, 500);
     }
@@ -68,6 +70,22 @@ public void SingleFileCtor_MultiFileTrue_ExpandsRollover ()
         });
     }
 
+    [Test]
+    public void SingleFileCtor_MultiFileTrue_LoadsIndexBeforeExtension ()
+    {
+        var options = new MultiFileOptions { FormatPattern = "*$J(.).log" };
+        using var reader = CreateSingleFileReader(multiFile: true, options);
+
+        reader.ReadFiles();
+
+        Assert.Multiple(() =>
+        {
+            Assert.That(reader.IsMultiFile, Is.True);
+            Assert.That(reader.GetLogFileInfoList().Select(file => Path.GetFileName(file.FullName)),
+                Is.EqualTo(new[] { "app.2.log", "app.1.log", "app.log" }));
+        });
+    }
+
     [Test]
     public void MultiFileCtor_AlwaysMultiFile ()
     {
@@ -91,15 +109,15 @@ public void MultiFileCtor_AlwaysMultiFile ()
         });
     }
 
-    private LogfileReader CreateSingleFileReader (bool multiFile)
+    private LogfileReader CreateSingleFileReader (bool multiFile, MultiFileOptions? options = null)
     {
         return new LogfileReader(
             _logFile,
             new EncodingOptions { Encoding = Encoding.UTF8 },
             multiFile,
             bufferCount: 40,
             linesPerBuffer: 50,
-            new MultiFileOptions(),
+            options ?? new MultiFileOptions(),
             ReaderType.System,
             PluginRegistry.PluginRegistry.Instance,
             maximumLineLength: 500,

src/LogExpert.Tests/TestData/app.1.log

@@ -0,0 +1 @@
+app.1.log

src/LogExpert.Tests/TestData/app.2.log

@@ -0,0 +1 @@
+app.2.log