Optimizely Spellchecker for TinyMCE

services.AddMvc();
services.AddAlloy();
services.AddCmsHost()
  .AddCmsHtmlHelpers()
  .AddCmsUI()
  .AddAdmin()
  .AddVisitorGroupsUI()
  .AddTinyMce()
  .AddTinyMceSpellChecker()
  .AddAdminUserRegistration(options => options.Behavior = RegisterAdminUserBehaviors.Enabled |
                                                          RegisterAdminUserBehaviors.LocalRequestsOnly);

[ModuleDependency(typeof (EPiServer.TinyMCESpellChecker.InitializationModule))]
public class CustomizedTinyMceSpellCheckerInitialization: IConfigurableModule {
  private ServiceConfigurationContext _serviceConfigurationContext;
  private
  const string SpellCheckerPluginName = "spellchecker";

  public void Initialize(InitializationEngine context) {
    _serviceConfigurationContext.Services.Configure<TinyMceConfiguration>(config => {
      var defaultSettings = config.Default();
      var defaultToolbarSettings = defaultSettings["toolbar"] as string[] ?? new string[1];

      // Remove spellchecker from toolbar for default configuration
      Regex rgx = new Regex($ @ "\b{SpellCheckerPluginName}\b\s+|\s+\b{SpellCheckerPluginName}\b$");
      var toolbarWithSpellChecker = defaultToolbarSettings[0];
      defaultSettings["toolbar"] = rgx.Replace(toolbarWithSpellChecker, "");

      // Apply Spellchecker only for MainBody of ProductPage
      config.For<ProductPage>(p => p.MainBody)
        .Toolbar(toolbarWithSpellChecker);
    });
  }

  public void Uninitialize(InitializationEngine context) {}

  public void ConfigureContainer(ServiceConfigurationContext context) {
    _serviceConfigurationContext = context;
  }
}