fix for runaway regular expression on linux

explicitly set string dvars in quotes to allow setting empty dvars
allow piping in input from command line (#114)
update the distribution for top stats elo
prevent game log file rotation from stopping event parsing

SharedLibraryCore/Interfaces/IEventParserConfiguration.cs

@@ -39,6 +39,11 @@ namespace SharedLibraryCore.Interfaces
         /// </summary>
         ParserRegex Action { get; set; }
 
+        /// <summary>
+        /// stores the regex information for the time prefix in game log
+        /// </summary>
+        ParserRegex Time { get; set; }
+
         /// <summary>
         /// indicates the format expected for parsed guids
         /// </summary>

SharedLibraryCore/Interfaces/IGameLogReader.cs

@@ -1,6 +1,4 @@
-using System;
-using System.Collections.Generic;
-using System.Text;
+using System.Collections.Generic;
 using System.Threading.Tasks;
 
 namespace SharedLibraryCore.Interfaces
@@ -17,11 +15,13 @@ namespace SharedLibraryCore.Interfaces
         /// <param name="fileSizeDiff"></param>
         /// <param name="startPosition"></param>
         /// <returns></returns>
-        Task<ICollection<GameEvent>> ReadEventsFromLog(Server server, long fileSizeDiff, long startPosition);
+        Task<IEnumerable<GameEvent>> ReadEventsFromLog(Server server, long fileSizeDiff, long startPosition);
+        
         /// <summary>
         /// how long the log file is
         /// </summary>
         long Length { get; }
+
         /// <summary>
         /// how often to poll the log file
         /// </summary>

SharedLibraryCore/Interfaces/IMatchResult.cs

@@ -0,0 +1,18 @@
+namespace SharedLibraryCore.Interfaces
+{
+    /// <summary>
+    /// represents a pattern match result
+    /// </summary>
+    public interface IMatchResult
+    {
+        /// <summary>
+        /// array of matched pattern groups
+        /// </summary>
+        string[] Values { get; set; }
+
+        /// <summary>
+        /// indicates if the match succeeded
+        /// </summary>
+        bool Success { get; set; }
+    }
+}

SharedLibraryCore/Interfaces/IParserPatternMatcher.cs

@@ -0,0 +1,21 @@
+namespace SharedLibraryCore.Interfaces
+{
+    /// <summary>
+    /// defines the capabilities of a parser pattern
+    /// </summary>
+    public interface IParserPatternMatcher
+    {
+        /// <summary>
+        /// converts input string into pattern groups
+        /// </summary>
+        /// <param name="input">input string</param>
+        /// <returns>group matches</returns>
+        IMatchResult Match(string input);
+
+        /// <summary>
+        /// compiles the pattern to be used for matching
+        /// </summary>
+        /// <param name="pattern"></param>
+        void Compile(string pattern);
+    }
+}

SharedLibraryCore/Interfaces/IParserRegexFactory.cs

@@ -0,0 +1,14 @@
+namespace SharedLibraryCore.Interfaces
+{
+    /// <summary>
+    /// defines the capabilities of the parser regex factory
+    /// </summary>
+    public interface IParserRegexFactory
+    {
+        /// <summary>
+        /// creates a new ParserRegex instance
+        /// </summary>
+        /// <returns>ParserRegex instance</returns>
+        ParserRegex CreateParserRegex();
+    }
+}