Change update logic

Wox.Core/Updater/SemanticVersion.cs

@@ -0,0 +1,95 @@
+using System;
+using Wox.Core.Exception;
+
+namespace Wox.Core.Updater
+{
+    public class SemanticVersion : IComparable
+    {
+        public int MAJOR { get; set; }
+        public int MINOR { get; set; }
+        public int PATCH { get; set; }
+
+        public SemanticVersion(System.Version version)
+        {
+            MAJOR = version.Major;
+            MINOR = version.Minor;
+            PATCH = version.Build;
+        }
+
+        public SemanticVersion(int major, int minor, int patch)
+        {
+            MAJOR = major;
+            MINOR = minor;
+            PATCH = patch;
+        }
+
+        public SemanticVersion(string version)
+        {
+            var strings = version.Split('.');
+            if (strings.Length != 3)
+            {
+                throw new WoxException("Invalid semantic version");
+            }
+            MAJOR = int.Parse(strings[0]);
+            MINOR = int.Parse(strings[1]);
+            PATCH = int.Parse(strings[2]);
+        }
+
+        public static bool operator >(SemanticVersion v1, SemanticVersion v2)
+        {
+            return v1.CompareTo(v2) > 0;
+        }
+
+        public static bool operator <(SemanticVersion v1, SemanticVersion v2)
+        {
+            return v1.CompareTo(v2) < 0;
+        }
+
+        public static bool operator ==(SemanticVersion v1, SemanticVersion v2)
+        {
+            if (ReferenceEquals(v1, null))
+            {
+                return ReferenceEquals(v2, null);
+            }
+            if (ReferenceEquals(v2, null))
+            {
+                return false;
+            }
+            return v1.Equals(v2);
+        }
+
+        public static bool operator !=(SemanticVersion v1, SemanticVersion v2)
+        {
+            return !(v1 == v2);
+        }
+
+        public override string ToString()
+        {
+            return string.Format("{0}.{1}.{2}", MAJOR, MINOR, PATCH);
+        }
+
+        public override bool Equals(object version)
+        {
+            var v2 = (SemanticVersion)version;
+            return MAJOR == v2.MAJOR && MINOR == v2.MINOR && PATCH == v2.PATCH;
+        }
+
+        public int CompareTo(object version)
+        {
+            var v2 = (SemanticVersion)version;
+            if (MAJOR == v2.MAJOR)
+            {
+                if (MINOR == v2.MINOR)
+                {
+                    if (PATCH == v2.PATCH)
+                    {
+                        return 0;
+                    }
+                    return PATCH - v2.PATCH;
+                }
+                return MINOR - v2.MINOR;
+            }
+            return MAJOR - v2.MAJOR;
+        }
+    }
+}