refactor<*>: rewrite all codes...

src/Commands/Branches.cs

@@ -0,0 +1,78 @@
+using System;
+using System.Collections.Generic;
+using System.Text.RegularExpressions;
+
+namespace SourceGit.Commands {
+    /// <summary>
+    ///     解析所有的分支
+    /// </summary>
+    public class Branches : Command {
+        private static readonly string PREFIX_LOCAL = "refs/heads/";
+        private static readonly string PREFIX_REMOTE = "refs/remotes/";
+        private static readonly string CMD = "branch -l --all -v --format=\"$%(refname)$%(objectname)$%(HEAD)$%(upstream)$%(upstream:track)$%(contents:subject)\"";
+        private static readonly Regex REG_FORMAT = new Regex(@"\$(.*)\$(.*)\$([\* ])\$(.*)\$(.*?)\$(.*)");
+        private static readonly Regex REG_AHEAD = new Regex(@"ahead (\d+)");
+        private static readonly Regex REG_BEHIND = new Regex(@"behind (\d+)");
+
+        private List<Models.Branch> loaded = new List<Models.Branch>();
+
+        public Branches(string path) {
+            Cwd = path;
+            Args = CMD;
+        }
+
+        public List<Models.Branch> Result() {
+            Exec();
+            return loaded;
+        }
+
+        public override void OnReadline(string line) {
+            var match = REG_FORMAT.Match(line);
+            if (!match.Success) return;
+
+            var branch = new Models.Branch();
+            var refName = match.Groups[1].Value;
+            if (refName.EndsWith("/HEAD")) return;
+
+            if (refName.StartsWith(PREFIX_LOCAL, StringComparison.Ordinal)) {
+                branch.Name = refName.Substring(PREFIX_LOCAL.Length);
+                branch.IsLocal = true;
+            } else if (refName.StartsWith(PREFIX_REMOTE, StringComparison.Ordinal)) {
+                var name = refName.Substring(PREFIX_REMOTE.Length);
+                branch.Remote = name.Substring(0, name.IndexOf('/'));
+                branch.Name = name.Substring(branch.Remote.Length + 1);
+                branch.IsLocal = false;
+            } else {
+                branch.Name = refName;
+                branch.IsLocal = true;
+            }
+
+            branch.FullName = refName;
+            branch.Head = match.Groups[2].Value;
+            branch.IsCurrent = match.Groups[3].Value == "*";
+            branch.Upstream = match.Groups[4].Value;
+            branch.UpstreamTrackStatus = ParseTrackStatus(match.Groups[5].Value);
+            branch.HeadSubject = match.Groups[6].Value;
+
+            loaded.Add(branch);
+        }
+
+        private string ParseTrackStatus(string data) {
+            if (string.IsNullOrEmpty(data)) return "";
+
+            string track = "";
+
+            var ahead = REG_AHEAD.Match(data);
+            if (ahead.Success) {
+                track += ahead.Groups[1].Value + "↑ ";
+            }
+
+            var behind = REG_BEHIND.Match(data);
+            if (behind.Success) {
+                track += behind.Groups[1].Value + "↓";
+            }
+
+            return track.Trim();
+        }
+    }
+}