// No update at this point
private async Task <string> UpsertTag(string tag, List <string> tagList)
{
if (tagList.Any(x => x == TagNormaliser.Normalise(tag)))
{
return(null);
}
return(TagNormaliser.Normalise(tag));
}
public async Task <TagsDto> GetTagsByTagNameAndDate(string tag, DateTime date)
{
if (tag == null || date == default(DateTime))
{
return(null);
}
var normalisedTag = TagNormaliser.Normalise(tag);
var articles = _articlesContext.Articles
.Where(x => x.Tags.Any(y => y == normalisedTag) && x.Date.Date == date.Date).ToList();
if (!articles.Any())
{
return(null);
}
// rather big linq statement -> select tags lists from each article and flatten
var relatedTags = articles
.SelectMany(x => x.Tags)
// Remove present tag
.Where(x => x != normalisedTag)
// deduplicate
.ToHashSet();
var tagDto = new TagsDto
{
Tag = normalisedTag,
// take a maximum of 10 articles
Articles = articles.Select(x => x.Id).Take(10).ToArray(),
// Get total related tags for the day
Count = articles.SelectMany(x => x.Tags).Count(),
RelatedTags = relatedTags.ToArray()
};
return(tagDto);
}