Umbraco v12 Bulk Find and Replace using ContentService

FindAndReplaceApiController.cs

using Umbraco.Cms.Web.BackOffice.Controllers;
using Umbraco.Cms.Core.Services;
using Microsoft.AspNetCore.Mvc;

namespace FindAndReplace.Core.Controllers
{
    public class FindAndReplaceApiController : UmbracoAuthorizedApiController
    {
        private readonly IContentTypeService _contentTypeService;
        private readonly IContentService _contentService;


        public FindAndReplaceApiController(IContentTypeService contentTypeService,
                                            IContentService contentService)
        {
            _contentTypeService = contentTypeService;
            _contentService = contentService;
        }

        /// <summary>
        /// Url: /umbraco/backoffice/api/FindAndReplaceApi/PostBulkUpdate
        /// </summary>
        public ActionResult PostBulkUpdate()
        {
            // ContentType by alias
            var contentType = _contentTypeService.Get("article");

            var contentOfType = _contentService.GetPagedOfType(contentType.Id, 0, int.MaxValue, out long totalArchive, null);

            foreach (var content in contentOfType)
            {
                // the node name can be used as the title
                if(content.Name.Contains("youtube", StringComparison.InvariantCultureIgnoreCase))
                {
                    content.Name = content.Name.Replace("youtube", "MyTube", StringComparison.InvariantCultureIgnoreCase);
                }

                // alternately, we could iterate all properties from the document
                if(content.HasProperty("title"))
                {
                    foreach(var value in content.Properties["title"].Values)
                    {
                        // if this is a JSON object (eg, BlockList) we may want to add some safety to check the Json is still valid
                        if(value.EditedValue.ToString().Contains("youtube", StringComparison.InvariantCultureIgnoreCase))
                        {
                            var newValue = value.EditedValue.ToString().Replace("youtube", "MyTube", StringComparison.InvariantCultureIgnoreCase);
                            content.Properties["title"].SetValue(newValue);
                        }
                    }
                }

                if(content.IsDirty())
                {
                    _contentService.SaveAndPublish(content);
                }
            }

            return new OkResult();
        }
    }
}