public async Task <Tour> AddAsync(Tour tour, IFormFileCollection images)
{
foreach (var file in images.AsEnumerable())
{
using var stream = file.OpenReadStream();
string url = await _remoteFileStorageHandler.UploadAsync(stream, "jpg");
tour.ImageUrls.Add(url);
}
await _dbContext.AddAsync(tour);
return(tour);
}
public async Task <Post> AddAsync(Post post, IFormFile coverImg)
{
if (coverImg != null)
{
using var stream = coverImg.OpenReadStream();
post.CoverImgUrl = await _remoteFileStorageHandler.UploadAsync(stream, "jpg");
}
_doc.LoadHtml(post.Content);
var imageUrls = await _doc.ProcessBase64Images(_remoteFileStorageHandler);
post.ImageUrls.AddRange(imageUrls);
post.Content = _doc.DocumentNode.InnerHtml;
post.LastUpdated = DateTime.Now;
await _dbContext.Posts.AddAsync(post);
return(post);
}
// Parse images that use Base64 string for src attribute, upload to remote storage and replace src with hosted image url
public static async Task <IEnumerable <string> > ProcessBase64Images(this HtmlDocument doc, IRemoteFileStorageHandler remoteFileStorageHandler)
{
List <string> uploadedImgUrls = new();
var imgTags = doc.DocumentNode.SelectNodes("//img");
if (imgTags != null)
{
foreach (var img in imgTags)
{
var src = img.Attributes["src"].Value;
// Upload image and set src to the image url
if (src.StartsWith("data:image"))
{
var stream = new MemoryStream(Convert.FromBase64String(src.Split(";base64,")[1]));
src = await remoteFileStorageHandler.UploadAsync(stream, "jpg");
img.Attributes["src"].Value = src;
}
uploadedImgUrls.Add(src);
}
}
return(uploadedImgUrls);
}
