[backend/masto-client] Add icon to InstanceInfoV2Response

Iceshrimp.Backend/Controllers/Mastodon/InstanceController.cs

@@ -61,14 +61,20 @@ public class InstanceController(
 			                                   && !Constants.SystemUsers.Contains(p.UsernameLower)
 			                                   && p.LastActiveDate > cutoff);
 
-		var (instanceName, instanceDescription, adminContact) =
+		var (instanceName, instanceDescription, adminContact, iconId) =
 			await meta.GetManyAsync(MetaEntity.InstanceName, MetaEntity.InstanceDescription,
-			                        MetaEntity.AdminContactEmail);
+			                        MetaEntity.AdminContactEmail, MetaEntity.IconFileId);
+
+		var favicon = await db.DriveFiles.Where(p => p.Id == iconId)
+		                      .Select(p => new InstanceIcon(p.PublicUrl ?? p.RawAccessUrl, p.Properties.Width ?? 128,
+		                                                    p.Properties.Height ?? 128))
+		                      .FirstOrDefaultAsync();
 
 		return new InstanceInfoV2Response(config.Value, instanceName, instanceDescription, adminContact)
 		{
 			Usage = new InstanceUsage { Users = new InstanceUsersUsage { ActiveMonth = activeMonth } },
-			Rules = await GetRules()
+			Rules = await GetRules(),
+			Icons = favicon != null ? [favicon] : []
 		};
 	}
 

Iceshrimp.Backend/Controllers/Mastodon/Schemas/InstanceInfoV2Response.cs

@@ -29,6 +29,8 @@ public class InstanceInfoV2Response(
 
 	[J("rules")] public required List<RuleEntity> Rules { get; set; }
 
+	[J("icon")] public required List<InstanceIcon> Icons { get; set; }
+
 	//TODO: add the rest
 }
 
@@ -77,3 +79,9 @@ public class InstanceExtendedDescription(string? description)
 	[J("content")]
 	public string Content => description ?? "This Iceshrimp.NET instance does not appear to have a description";
 }
+
+public class InstanceIcon(string src, int width, int height)
+{
+	[J("src")]  public string Url  => src;
+	[J("size")] public string Size => $"{width}x{height}";
+}