Rename management API from Umbraco.Cms.ManagementApi to Umbraco.Cms.Api.Management (#13512)

src/Umbraco.Cms.Api.Management/Controllers/Language/UpdateLanguageController.cs

@@ -0,0 +1,66 @@
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Mvc;
+using Umbraco.Cms.Core.Mapping;
+using Umbraco.Cms.Core.Models;
+using Umbraco.Cms.Core.Services;
+using Umbraco.Cms.Api.Management.ViewModels.Language;
+using Umbraco.New.Cms.Core.Services.Installer;
+
+namespace Umbraco.Cms.Api.Management.Controllers.Language;
+
+public class UpdateLanguageController : LanguageControllerBase
+{
+    private readonly ILanguageService _languageService;
+    private readonly IUmbracoMapper _umbracoMapper;
+    private readonly ILocalizationService _localizationService;
+
+    public UpdateLanguageController(ILanguageService languageService, IUmbracoMapper umbracoMapper, ILocalizationService localizationService)
+    {
+        _languageService = languageService;
+        _umbracoMapper = umbracoMapper;
+        _localizationService = localizationService;
+    }
+
+    /// <summary>
+    ///     Updates a language
+    /// </summary>
+    [HttpPut("update")]
+    [MapToApiVersion("1.0")]
+    [ProducesResponseType(typeof(NotFoundResult), StatusCodes.Status404NotFound)]
+    [ProducesResponseType(typeof(ProblemDetails), StatusCodes.Status400BadRequest)]
+    [ProducesResponseType(StatusCodes.Status200OK)]
+    // TODO: This needs to be an authorized endpoint.
+    public async Task<ActionResult> Update(LanguageViewModel language)
+    {
+        ILanguage? existingById = language.Id != default ? _localizationService.GetLanguageById(language.Id) : null;
+        if (existingById is null)
+        {
+            return await Task.FromResult(NotFound());
+        }
+
+        // note that the service will prevent the default language from being "un-defaulted"
+        // but does not hurt to test here - though the UI should prevent it too
+        if (existingById.IsDefault && !language.IsDefault)
+        {
+            ModelState.AddModelError("IsDefault", "Cannot un-default the default language.");
+            return await Task.FromResult(ValidationProblem(ModelState));
+        }
+
+        existingById = _umbracoMapper.Map(language, existingById);
+
+        if (!_languageService.CanUseLanguagesFallbackLanguage(existingById))
+        {
+            ModelState.AddModelError("FallbackLanguage", "The selected fall back language does not exist.");
+            return await Task.FromResult(ValidationProblem(ModelState));
+        }
+
+        if (!_languageService.CanGetProperFallbackLanguage(existingById))
+        {
+            ModelState.AddModelError("FallbackLanguage", $"The selected fall back language {_localizationService.GetLanguageById(existingById.FallbackLanguageId!.Value)} would create a circular path.");
+            return await Task.FromResult(ValidationProblem(ModelState));
+        }
+
+        _localizationService.Save(existingById);
+        return await Task.FromResult(Ok());
+    }
+}