feature: supports get avatar from avatars.githubusercontent.com

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

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 @@ namespace SourceGit.Models
             {
                 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 @@ namespace SourceGit.Models
 
                     lock (_synclock)
                     {
-                        _requesting.Remove(md5);
+                        _requesting.Remove(email);
                     }
 
                     Dispatcher.UIThread.InvokeAsync(() =>
                     {
-                        _resources[md5] = img;
-                        NotifyResourceChanged(md5);
+                        _resources[email] = img;
+                        NotifyResourceChanged(email);
                     });
                 }
             });
@@ -104,25 +115,36 @@ namespace SourceGit.Models
             _avatars.Remove(host);
         }
 
-        public static Bitmap Request(string md5, bool forceRefetch = false)
+        public static Bitmap Request(string email, bool forceRefetch)
         {
+            if (email.Equals("noreply@github.com", 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
@@ -130,7 +152,7 @@ namespace SourceGit.Models
                         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 @@ namespace SourceGit.Models
 
             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 @@ namespace SourceGit.Models
         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 @@ namespace SourceGit.Models
         {
             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 @@ namespace SourceGit.Models
 
             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);
             }

src/SourceGit.csproj

@@ -29,10 +29,11 @@
 
   <ItemGroup>
     <AvaloniaResource Include="App.ico" />
-    <AvaloniaResource Include="Resources/ExternalToolIcons/*" />
-    <AvaloniaResource Include="Resources/ExternalToolIcons/JetBrains/*" />
     <AvaloniaResource Include="Resources/Fonts/*" />
-    <AvaloniaResource Include="Resources/ShellIcons/*" />
+    <AvaloniaResource Include="Resources/Images/*" />
+    <AvaloniaResource Include="Resources/Images/ExternalToolIcons/*" />
+    <AvaloniaResource Include="Resources/Images/ExternalToolIcons/JetBrains/*" />
+    <AvaloniaResource Include="Resources/Images/ShellIcons/*" />
   </ItemGroup>
 
   <ItemGroup>

src/Views/Avatar.cs

@@ -1,7 +1,5 @@
 using System;
 using System.Globalization;
-using System.Security.Cryptography;
-using System.Text;
 
 using Avalonia;
 using Avalonia.Controls;
@@ -42,7 +40,7 @@ namespace SourceGit.Views
             {
                 if (User != null)
                 {
-                    Models.AvatarManager.Request(_emailMD5, true);
+                    Models.AvatarManager.Request(User.Email, true);
                     InvalidateVisual();
                 }
             };
@@ -59,7 +57,7 @@ namespace SourceGit.Views
                 return;
 
             var corner = (float)Math.Max(2, Bounds.Width / 16);
-            var img = Models.AvatarManager.Request(_emailMD5);
+            var img = Models.AvatarManager.Request(User.Email, false);
             if (img != null)
             {
                 var rect = new Rect(0, 0, Bounds.Width, Bounds.Height);
@@ -74,9 +72,9 @@ namespace SourceGit.Views
             }
         }
 
-        public void OnAvatarResourceChanged(string md5)
+        public void OnAvatarResourceChanged(string email)
         {
-            if (_emailMD5 == md5)
+            if (User.Email.Equals(email, StringComparison.Ordinal))
             {
                 InvalidateVisual();
             }
@@ -97,10 +95,7 @@ namespace SourceGit.Views
         private static void OnUserPropertyChanged(Avatar avatar, AvaloniaPropertyChangedEventArgs e)
         {
             if (avatar.User == null)
-            {
-                avatar._emailMD5 = null;
                 return;
-            }
 
             var placeholder = string.IsNullOrWhiteSpace(avatar.User.Name) ? "?" : avatar.User.Name.Substring(0, 1);
             var chars = placeholder.ToCharArray();
@@ -108,15 +103,6 @@ namespace SourceGit.Views
             foreach (var c in chars)
                 sum += Math.Abs(c);
 
-            var lowered = avatar.User.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"));
-            var md5 = builder.ToString();
-            if (avatar._emailMD5 == null || avatar._emailMD5 != md5)
-                avatar._emailMD5 = md5;
-
             avatar._fallbackBrush = new LinearGradientBrush
             {
                 GradientStops = FALLBACK_GRADIENTS[sum % FALLBACK_GRADIENTS.Length],
@@ -139,6 +125,5 @@ namespace SourceGit.Views
 
         private FormattedText _fallbackLabel = null;
         private LinearGradientBrush _fallbackBrush = null;
-        private string _emailMD5 = null;
     }
 }

src/Views/Preference.axaml

@@ -294,22 +294,22 @@
                       IsVisible="{OnPlatform False, Windows=True}">
               <ComboBox.Items>
                 <Grid ColumnDefinitions="Auto,*">
-                  <Image Grid.Column="0" Width="16" Height="16" Source="/Resources/ShellIcons/git-bash.png" RenderOptions.BitmapInterpolationMode="HighQuality"/>
+                  <Image Grid.Column="0" Width="16" Height="16" Source="/Resources/Images/ShellIcons/git-bash.png" RenderOptions.BitmapInterpolationMode="HighQuality"/>
                   <TextBlock Grid.Column="1" Text="Git Bash" Margin="6,0,0,0"/>
                 </Grid>
                 
                 <Grid ColumnDefinitions="Auto,*">
-                  <Image Grid.Column="0" Width="16" Height="16" Source="/Resources/ShellIcons/pwsh.png" RenderOptions.BitmapInterpolationMode="HighQuality"/>
+                  <Image Grid.Column="0" Width="16" Height="16" Source="/Resources/Images/ShellIcons/pwsh.png" RenderOptions.BitmapInterpolationMode="HighQuality"/>
                   <TextBlock Grid.Column="1" Text="PowerShell" Margin="6,0,0,0"/>
                 </Grid>
 
                 <Grid ColumnDefinitions="Auto,*">
-                  <Image Grid.Column="0" Width="16" Height="16" Source="/Resources/ShellIcons/cmd.png" RenderOptions.BitmapInterpolationMode="HighQuality"/>
+                  <Image Grid.Column="0" Width="16" Height="16" Source="/Resources/Images/ShellIcons/cmd.png" RenderOptions.BitmapInterpolationMode="HighQuality"/>
                   <TextBlock Grid.Column="1" Text="Command Prompt" Margin="6,0,0,0"/>
                 </Grid>
 
                 <Grid ColumnDefinitions="Auto,*">
-                  <Image Grid.Column="0" Width="16" Height="16" Source="/Resources/ShellIcons/wt.png" RenderOptions.BitmapInterpolationMode="HighQuality"/>
+                  <Image Grid.Column="0" Width="16" Height="16" Source="/Resources/Images/ShellIcons/wt.png" RenderOptions.BitmapInterpolationMode="HighQuality"/>
                   <TextBlock Grid.Column="1" Text="Default Shell in Windows Terminal" Margin="6,0,0,0"/>
                 </Grid>
               </ComboBox.Items>