public async Task <ArticleEnvelope> Handle(Command message)
{
var article = await _context.Articles.FirstOrDefaultAsync(x => x.Slug == message.Slug);
if (article == null)
{
throw new RestException(HttpStatusCode.NotFound);
}
var person = await _context.Persons.FirstOrDefaultAsync(x => x.Username == _currentUserAccessor.GetCurrentUsername());
var favorite = await _context.ArticleFavorites.FirstOrDefaultAsync(x => x.ArticleId == article.ArticleId && x.PersonId == person.PersonId);
if (favorite == null)
{
favorite = new ArticleFavorite()
{
Article = article,
ArticleId = article.ArticleId,
Person = person,
PersonId = person.PersonId
};
await _context.ArticleFavorites.AddAsync(favorite);
await _context.SaveChangesAsync();
}
return(new ArticleEnvelope(await _context.Articles.GetAllData()
.FirstOrDefaultAsync(x => x.ArticleId == article.ArticleId)));
}
/// <summary>
/// 收藏或取消收藏文章
/// </summary>
/// <param name="articleFavorite">文章收藏模型</param>
/// <returns></returns>
public async Task <int> AddOrUpdateArticleFavorite(ArticleFavorite articleFavorite)
{
var oldArticleFavorite = await dbContext.ArticleFavorite.SingleOrDefaultAsync(af => af.PKID == articleFavorite.PKID && af.UserId == articleFavorite.UserId);
try
{
//取消收藏文章
if (oldArticleFavorite != null)
{
dbContext.ArticleFavorite.Remove(oldArticleFavorite);
await dbContext.SaveChangesAsync();
return(Success);
}
//收藏文章
else
{
dbContext.ArticleFavorite.Add(articleFavorite);
await dbContext.SaveChangesAsync();
return(Success);
}
}
catch (Exception ex)
{
//记录日志
return(Error);
}
}
public async Task <ArticleEnvelope> FavoriteAdd(string slug, CancellationToken cancellationToken)
{
var article = await this.context.Articles
.FirstOrDefaultAsync(x => x.Slug.Equals(slug), cancellationToken);
if (article == null)
{
throw new RestException(HttpStatusCode.NotFound);
}
var person = await this.context.Persons
.FirstOrDefaultAsync(x => x.Username.Equals(this.currentUserAccessor.GetCurrentUsername()), cancellationToken);
var favorite = await this.context.ArticleFavorites
.FirstOrDefaultAsync(x => x.ArticleId == article.ArticleId && x.PersonId == person.PersonId, cancellationToken);
if (favorite == null)
{
favorite = new ArticleFavorite()
{
Article = article,
ArticleId = article.ArticleId,
Person = person,
PersonId = person.PersonId
};
await this.context.ArticleFavorites.AddAsync(favorite, cancellationToken);
await this.context.SaveChangesAsync(cancellationToken);
}
return(new ArticleEnvelope(await this.context.Articles.GetAllData()
.FirstOrDefaultAsync(x => x.ArticleId == article.ArticleId, cancellationToken)));
}
public async Task <bool> AddFavorite(string slug, string token)
{
var user = ServiceProvider.GetRequiredService <UserService>().GetCurrentUser(token);
if (user == null)
{
throw new ApplicationException("Not logged in.");
}
if (user.Favorites.Any(a => a.Article.Slug == slug))
{
return(true);
}
var article = ServiceProvider.GetRequiredService <ArticleService>().GetArticle(slug);
if (article == null)
{
throw new ApplicationException("Not found.");
}
var newFavorite = new ArticleFavorite
{
UserUid = user.UserUid,
ArticleUid = article.ArticleUid,
ArticleFavoriteUid = Guid.NewGuid()
};
Context.Favorites.Add(newFavorite);
var count = await Context.SaveChangesAsync();
return(count > 0);
}
/// <summary>
/// 新增或更新文章收藏记录
/// </summary>
/// <param name="articleFavorite"></param>
/// <returns></returns>
public static async Task <int> SaveArticleFavorite(ArticleFavorite articleFavorite)
{
var article = await articleDal.SelectArticleDetailById(articleFavorite.PKID);
if (article == null)
{
throw new Exception("文章不存在");
}
return(await articleFavoriteDal.AddOrUpdateArticleFavorite(articleFavorite));
}
public Task <Option <ArticleModel, Error> > FavoriteAsync(string userId, string slug) =>
GetUserByIdOrError(userId).FlatMapAsync(user =>
GetArticleBySlug(slug)
.FilterAsync(async article => !article.Favorites.Any(af => af.UserId == userId), "You have already favorited this article.")
.FlatMapAsync(async article =>
{
var articleFavorite = new ArticleFavorite
{
ArticleId = article.Id,
UserId = userId
};
DbContext.ArticleFavorites.Add(articleFavorite);
await DbContext.SaveChangesAsync();
return(await GetBySlugAsync(user.Id.Some(), slug));
}));
