Preserve SplashscreenLocation when updating branding config (#13756)

* add BrandingOptionsDto and add branding endpoints

* refactor new HttpGet Configuration Branding into existing API calls

* Add BrandingOptions to _ignoredConfigurations for openAPI

* rename BrandOptionsDto to BrandingOptionsDto

2 files changed, 36 insertions, 2 deletions

diff --git a/Jellyfin.Api/Controllers/BrandingController.cs b/Jellyfin.Api/Controllers/BrandingController.cs
index 3c2c4b4db..1d948ff20 100644
--- a/Jellyfin.Api/Controllers/BrandingController.cs
+++ b/Jellyfin.Api/Controllers/BrandingController.cs
@@ -29,9 +29,18 @@ public class BrandingController : BaseJellyfinApiController
     /// <returns>An <see cref="OkResult"/> containing the branding configuration.</returns>
     [HttpGet("Configuration")]
     [ProducesResponseType(StatusCodes.Status200OK)]
-    public ActionResult<BrandingOptions> GetBrandingOptions()
+    public ActionResult<BrandingOptionsDto> GetBrandingOptions()
     {
-        return _serverConfigurationManager.GetConfiguration<BrandingOptions>("branding");
+        var brandingOptions = _serverConfigurationManager.GetConfiguration<BrandingOptions>("branding");
+
+        var brandingOptionsDto = new BrandingOptionsDto
+        {
+            LoginDisclaimer = brandingOptions.LoginDisclaimer,
+            CustomCss = brandingOptions.CustomCss,
+            SplashscreenEnabled = brandingOptions.SplashscreenEnabled
+        };
+
+        return brandingOptionsDto;
     }
 
     /// <summary>
diff --git a/Jellyfin.Api/Controllers/ConfigurationController.cs b/Jellyfin.Api/Controllers/ConfigurationController.cs
index abe8bec2d..8dcaebf6d 100644
--- a/Jellyfin.Api/Controllers/ConfigurationController.cs
+++ b/Jellyfin.Api/Controllers/ConfigurationController.cs
@@ -9,6 +9,7 @@ using Jellyfin.Extensions.Json;
 using MediaBrowser.Common.Api;
 using MediaBrowser.Controller.Configuration;
 using MediaBrowser.Controller.MediaEncoding;
+using MediaBrowser.Model.Branding;
 using MediaBrowser.Model.Configuration;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Http;
@@ -120,6 +121,30 @@ public class ConfigurationController : BaseJellyfinApiController
     }
 
     /// <summary>
+    /// Updates branding configuration.
+    /// </summary>
+    /// <param name="configuration">Branding configuration.</param>
+    /// <response code="204">Branding configuration updated.</response>
+    /// <returns>Update status.</returns>
+    [HttpPost("Configuration/Branding")]
+    [Authorize(Policy = Policies.RequiresElevation)]
+    [ProducesResponseType(StatusCodes.Status204NoContent)]
+    public ActionResult UpdateBrandingConfiguration([FromBody, Required] BrandingOptionsDto configuration)
+    {
+        // Get the current branding configuration to preserve SplashscreenLocation
+        var currentBranding = (BrandingOptions)_configurationManager.GetConfiguration("branding");
+
+        // Update only the properties from BrandingOptionsDto
+        currentBranding.LoginDisclaimer = configuration.LoginDisclaimer;
+        currentBranding.CustomCss = configuration.CustomCss;
+        currentBranding.SplashscreenEnabled = configuration.SplashscreenEnabled;
+
+        _configurationManager.SaveConfiguration("branding", currentBranding);
+
+        return NoContent();
+    }
+
+    /// <summary>
     /// Updates the path to the media encoder.
     /// </summary>
     /// <param name="mediaEncoderPath">Media encoder path form body.</param>