public async Task <IActionResult> AddHashTag(int linkId, [FromBody] HashTag tag)
{
var link = await _context.SiteLinks
.Include(l => l.SiteLinkHashTags)
.FirstOrDefaultAsync(l => l.Id == linkId);
if (link is null)
{
return(NotFound());
}
// TODO: maybe it's better to match tag by name rather then id. MR
var tagAlreadyExists = link.SiteLinkHashTags
.Select(lt => lt.HashTagId)
.Contains(tag.Id);
if (tagAlreadyExists)
{
return(Ok());
}
_context.Attach(link);
_context.Update(new SiteLinkHashTag
{
SiteLinkId = linkId,
HashTag = tag,
});
await _context.SaveChangesAsync();
return(Ok());
}