feature<Statistics>: finish statistiscs

src/Commands/Statistics.cs

@@ -0,0 +1,32 @@
+using System;
+
+namespace SourceGit.Commands {
+    public class Statistics : Command {
+        public Statistics(string repo) {
+            _statistics = new Models.Statistics();
+
+            WorkingDirectory = repo;
+            Context = repo;
+            Args = $"log --date-order --branches --remotes --since=\"{_statistics.Since()}\" --date=unix --pretty=format:\"%ad$%an\"";
+        }
+
+        public Models.Statistics Result() {
+            Exec();
+            _statistics.Complete();
+            return _statistics;
+        }
+
+        protected override void OnReadline(string line) {
+            var dateEndIdx = line.IndexOf('$', StringComparison.Ordinal);
+            if (dateEndIdx == -1) return;
+
+            var dateStr = line.Substring(0, dateEndIdx);
+            var date = 0.0;
+            if (!double.TryParse(dateStr, out date)) return;
+
+            _statistics.AddCommit(line.Substring(dateEndIdx + 1), date);
+        }
+
+        private Models.Statistics _statistics = null;
+    }
+}