Export role details in JSON format (#1101)

DiscordChatExporter.Core/Exporting/ExportContext.cs

@@ -90,20 +90,25 @@ internal class ExportContext
     public Role? TryGetRole(Snowflake id) => _roles.GetValueOrDefault(id);
 
     public Color? TryGetUserColor(Snowflake id)
+    {
+        var memberRoles = GetUserRoles(id);
+
+        return memberRoles?
+            .Where(r => r.Color is not null)
+            .Select(r => r.Color)
+            .FirstOrDefault();
+    }
+
+    public IReadOnlyList<Role> GetUserRoles(Snowflake id)
     {
         var member = TryGetMember(id);
 
-        var memberRoles = member?
+        return member?
             .RoleIds
             .Select(TryGetRole)
             .WhereNotNull()
-            .ToArray();
-
-        return memberRoles?
-            .Where(r => r.Color is not null)
             .OrderByDescending(r => r.Position)
-            .Select(r => r.Color)
-            .FirstOrDefault();
+            .ToArray() ?? Array.Empty<Role>();
     }
 
     public async ValueTask<string> ResolveAssetUrlAsync(string url, CancellationToken cancellationToken = default)

DiscordChatExporter.Core/Exporting/JsonMessageWriter.cs

@@ -1,4 +1,5 @@
-using System.IO;
+using System.Collections.Generic;
+using System.IO;
 using System.Text.Encodings.Web;
 using System.Text.Json;
 using System.Threading;
@@ -48,6 +49,9 @@ internal class JsonMessageWriter : MessageWriter
         _writer.WriteString("color", Context.TryGetUserColor(user.Id)?.ToHex());
         _writer.WriteBoolean("isBot", user.IsBot);
 
+        _writer.WritePropertyName("roles");
+        await WriteRolesAsync(Context.GetUserRoles(user.Id), cancellationToken);
+
         _writer.WriteString(
             "avatarUrl",
             await Context.ResolveAssetUrlAsync(
@@ -60,6 +64,28 @@ internal class JsonMessageWriter : MessageWriter
         await _writer.FlushAsync(cancellationToken);
     }
 
+    private async ValueTask WriteRolesAsync(
+        IReadOnlyList<Role> roles,
+        CancellationToken cancellationToken = default)
+    {
+        _writer.WriteStartArray();
+
+        foreach (var role in roles)
+        {
+            _writer.WriteStartObject();
+
+            _writer.WriteString("id", role.Id.ToString());
+            _writer.WriteString("name", role.Name);
+            _writer.WriteString("color", role.Color?.ToHex());
+            _writer.WriteNumber("position", role.Position);
+
+            _writer.WriteEndObject();
+        }
+
+        _writer.WriteEndArray();
+        await _writer.FlushAsync(cancellationToken);
+    }
+
     private async ValueTask WriteEmbedAuthorAsync(
         EmbedAuthor embedAuthor,
         CancellationToken cancellationToken = default)