feature: supports get avatar from avatars.githubusercontent.com

* move all images to `src/Resources/Images` folder

Author: love-linger

src/Models/AvatarManager.cs

@@ -1,21 +1,26 @@
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
 using System.Net.Http;
+using System.Security.Cryptography;
+using System.Text;
+using System.Text.RegularExpressions;
 using System.Threading;
 using System.Threading.Tasks;
 
 using Avalonia.Media.Imaging;
+using Avalonia.Platform;
 using Avalonia.Threading;
 
 namespace SourceGit.Models
 {
     public interface IAvatarHost
     {
-        void OnAvatarResourceChanged(string md5);
+        void OnAvatarResourceChanged(string email);
     }
 
-    public static class AvatarManager
+    public static partial class AvatarManager
     {
         public static string SelectedServer
         {
@@ -33,29 +38,35 @@ static AvatarManager()
             {
                 while (true)
                 {
-                    var md5 = null as string;
+                    var email = null as string;
 
                     lock (_synclock)
                     {
                         foreach (var one in _requesting)
                         {
-                            md5 = one;
+                            email = one;
                             break;
                         }
                     }
 
-                    if (md5 == null)
+                    if (email == null)
                     {
                         Thread.Sleep(100);
                         continue;
                     }
 
+                    var md5 = GetEmailHash(email);
+                    var matchGithubUser = REG_GITHUB_USER_EMAIL().Match(email);
+                    var url = matchGithubUser.Success ?
+                        $"https://avatars.githubusercontent.com/{matchGithubUser.Groups[2].Value}" :
+                        $"{SelectedServer}{md5}?d=404";
+
                     var localFile = Path.Combine(_storePath, md5);
                     var img = null as Bitmap;
                     try
                     {
                         var client = new HttpClient() { Timeout = TimeSpan.FromSeconds(2) };
-                        var task = client.GetAsync($"{SelectedServer}{md5}?d=404");
+                        var task = client.GetAsync(url);
                         task.Wait();
 
                         var rsp = task.Result;
@@ -82,13 +93,13 @@ static AvatarManager()
 
                     lock (_synclock)
                     {
-                        _requesting.Remove(md5);
+                        _requesting.Remove(email);
                     }
 
                     Dispatcher.UIThread.InvokeAsync(() =>
                     {
-                        _resources[md5] = img;
-                        NotifyResourceChanged(md5);
+                        _resources[email] = img;
+                        NotifyResourceChanged(email);
                     });
                 }
             });
@@ -104,33 +115,44 @@ public static void Unsubscribe(IAvatarHost host)
             _avatars.Remove(host);
         }
 
-        public static Bitmap Request(string md5, bool forceRefetch = false)
+        public static Bitmap Request(string email, bool forceRefetch)
         {
+            if (email.Equals("[email protected]", StringComparison.Ordinal))
+            {
+                if (_githubEmailAvatar == null)
+                {
+                    var icon = AssetLoader.Open(new Uri($"avares://SourceGit/Resources/Images/github.png", UriKind.RelativeOrAbsolute));
+                    _githubEmailAvatar = new Bitmap(icon);
+                }
+
+                return _githubEmailAvatar;
+            }
+
             if (forceRefetch)
             {
-                if (_resources.ContainsKey(md5))
-                    _resources.Remove(md5);
+                if (_resources.ContainsKey(email))
+                    _resources.Remove(email);
 
-                var localFile = Path.Combine(_storePath, md5);
+                var localFile = Path.Combine(_storePath, GetEmailHash(email));
                 if (File.Exists(localFile))
                     File.Delete(localFile);
 
-                NotifyResourceChanged(md5);
+                NotifyResourceChanged(email);
             }
             else
             {
-                if (_resources.TryGetValue(md5, out var value))
+                if (_resources.TryGetValue(email, out var value))
                     return value;
 
-                var localFile = Path.Combine(_storePath, md5);
+                var localFile = Path.Combine(_storePath, GetEmailHash(email));
                 if (File.Exists(localFile))
                 {
                     try
                     {
                         using (var stream = File.OpenRead(localFile))
                         {
                             var img = Bitmap.DecodeToWidth(stream, 128);
-                            _resources.Add(md5, img);
+                            _resources.Add(email, img);
                             return img;
                         }
                     }
@@ -143,18 +165,28 @@ public static Bitmap Request(string md5, bool forceRefetch = false)
 
             lock (_synclock)
             {
-                if (!_requesting.Contains(md5))
-                    _requesting.Add(md5);
+                if (!_requesting.Contains(email))
+                    _requesting.Add(email);
             }
 
             return null;
         }
 
-        private static void NotifyResourceChanged(string md5)
+        private static string GetEmailHash(string email)
+        {
+            var lowered = email.ToLower(CultureInfo.CurrentCulture).Trim();
+            var hash = MD5.Create().ComputeHash(Encoding.Default.GetBytes(lowered));
+            var builder = new StringBuilder();
+            foreach (var c in hash)
+                builder.Append(c.ToString("x2"));
+            return builder.ToString();
+        }
+
+        private static void NotifyResourceChanged(string email)
         {
             foreach (var avatar in _avatars)
             {
-                avatar.OnAvatarResourceChanged(md5);
+                avatar.OnAvatarResourceChanged(email);
             }
         }
 
@@ -163,5 +195,9 @@ private static void NotifyResourceChanged(string md5)
         private static readonly List<IAvatarHost> _avatars = new List<IAvatarHost>();
         private static readonly Dictionary<string, Bitmap> _resources = new Dictionary<string, Bitmap>();
         private static readonly HashSet<string> _requesting = new HashSet<string>();
+
+        [GeneratedRegex(@"^(?:(\d+)\+)?(.+?)@users\.noreply\.github\.com$")]
+        private static partial Regex REG_GITHUB_USER_EMAIL();
+        private static Bitmap _githubEmailAvatar = null;
     }
 }

src/Models/ExternalMerger.cs

@@ -20,7 +20,7 @@ public Bitmap IconImage
         {
             get
             {
-                var icon = AssetLoader.Open(new Uri($"avares://SourceGit/Resources/ExternalToolIcons/{Icon}.png", UriKind.RelativeOrAbsolute));
+                var icon = AssetLoader.Open(new Uri($"avares://SourceGit/Resources/Images/ExternalToolIcons/{Icon}.png", UriKind.RelativeOrAbsolute));
                 return new Bitmap(icon);
             }
         }

src/Models/ExternalTool.cs

@@ -25,7 +25,7 @@ public ExternalTool(string name, string icon, string executable, string openCmdA
 
             try
             {
-                var asset = AssetLoader.Open(new Uri($"avares://SourceGit/Resources/ExternalToolIcons/{icon}.png",
+                var asset = AssetLoader.Open(new Uri($"avares://SourceGit/Resources/Images/ExternalToolIcons/{icon}.png",
                     UriKind.RelativeOrAbsolute));
                 IconImage = new Bitmap(asset);
             }