90 lines
3.9 KiB
C#
90 lines
3.9 KiB
C#
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namespace Yes.Application.Blogs
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{
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public record GetRssQuery() : IRequest<GetRssQueryResponse>;
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public record GetRssQueryResponse(string Xml);
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public class GetRssQueryHandler(
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IOptionsMonitor<BlogSettings> options,
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BlogDbContext db,
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IMapper mapper) : IRequestHandler<GetRssQuery, GetRssQueryResponse>
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{
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private readonly BlogSettings _settings = options.CurrentValue;
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private readonly BlogDbContext _db = db;
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public async Task<GetRssQueryResponse> Handle(GetRssQuery request, CancellationToken cancellationToken)
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{
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var queryArticle = _db.Articles.Where(x => x.Type == ArticleTypeEnum.Article && x.Status == ArticleStatusEnum.Normal).AsQueryable();
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var pubDate = queryArticle.Any() ? _db.Articles.Min(x => x.PublishDate) : DateTime.MinValue;
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var channel = new Channel
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{
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Title = _settings.Name,
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Link = _settings.Url,
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Description = _settings.Description,
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Language = "zh-CN",
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FeedUrl = $"{_settings.Url}/feed/",
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PubDate = pubDate
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};
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// 添加扩展元素（示例）
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channel.Extensions.Add(new XElement("generator", _settings.Name));
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channel.Extensions.Add(new XElement("docs", "http://www.rssboard.org/rss-specification"));
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var query = from article in queryArticle
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join categoryTemp in _db.Categories.AsNoTracking() on article.CategoryId equals categoryTemp.Id into tempCategory
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from category in tempCategory.DefaultIfEmpty()
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join userTemp in _db.Users.AsNoTracking() on article.UserId equals userTemp.Id into tempUser
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from user in tempUser.DefaultIfEmpty()
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orderby article.Id descending
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select new ArticleModel
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{
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Id = article.Id,
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CanComment = article.CanComment,
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CommentCount = article.CommentCount,
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CategoryId = article.CategoryId,
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ModifyDate = article.ModifyDate.ToSafeTime(),
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PublishDate = article.PublishDate.ToSafeTime(),
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CreateDate = article.CreateDate.ToSafeTime(),
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Content = article.Content,
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CoverUrl = article.CoverUrl,
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Slug = article.Slug,
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ReadCount = article.ReadCount,
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Title = article.Title,
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Summary = article.Summary,
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UserId = article.UserId,
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Category = new CategoryModel
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{
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CoverUrl = category.CoverUrl,
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Description = category.Description,
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Id = category.Id,
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Name = category.Name,
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Slug = category.Slug
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}
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};
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var items = query.Select(x => new Item
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{
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Content = x.Content,
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Title = x.Title,
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Url = _settings.ArticleRoute.ToRoute(x.Category, x),
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Description = x.Summary,
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CommentsCount = x.CommentCount,
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Creator = x.UserId.ToString(),
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PublishDate = x.PublishDate,
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CommentsUrl = $"{_settings.ArticleRoute.ToRoute(x.Category, x)}#comments",
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CommentRssUrl = $"{_settings.Url}/feed/"
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});
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var generator = new RssGenerator();
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string xml = generator.GenerateRss(channel, items);
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return new GetRssQueryResponse(xml);
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}
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}
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}
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