/// <summary>
/// 创建 <see cref="DiscoveryPage"/>
/// </summary>
/// <param name="currentUserId">当前登录用户 ID</param>
/// <param name="dbContext"><see cref="KeylolDbContext"/></param>
/// <param name="cachedData"><see cref="CachedDataProvider"/></param>
/// <returns><see cref="DiscoveryPage"/></returns>
public static async Task <DiscoveryPage> CreateAsync(string currentUserId, KeylolDbContext dbContext,
CachedDataProvider cachedData)
{
var onSalePoints = await OnSalePointList.CreateAsync(currentUserId, 1, true, true, dbContext, cachedData);
var latestArticles = await LatestArticleList.CreateAsync(1, true, true, dbContext, cachedData);
return(new DiscoveryPage
{
SlideshowEntries = await SlideshowEntryList.CreateAsync(1, 4, dbContext),
SpotlightPoints = await SpotlightPointList.CreateAsync(currentUserId, 1, 30, dbContext, cachedData),
SpotlightReviews = await SpotlightArticleList.CreateAsync(currentUserId, 1, 4,
SpotlightArticleStream.ArticleCategory.Review, dbContext, cachedData),
SpotlightStudies = await SpotlightArticleList.CreateAsync(currentUserId, 1, 4,
SpotlightArticleStream.ArticleCategory.Study, dbContext, cachedData),
OnSalePointHeaderImage = onSalePoints.Item3,
OnSalePointPageCount = onSalePoints.Item2,
OnSalePoints = onSalePoints.Item1,
SpotlightStories = await SpotlightArticleList.CreateAsync(currentUserId, 1, 4,
SpotlightArticleStream.ArticleCategory.Story, dbContext, cachedData),
LatestArticleHeaderImage = latestArticles.Item3,
LatestArticlePageCount = latestArticles.Item2,
LatestArticles = latestArticles.Item1,
LatestActivityHeaderImage = onSalePoints.Item4,
LatestActivities = await TimelineCardList.CreateAsync(LatestActivityStream.Name, currentUserId,
12, false, dbContext, cachedData)
});
}
/// <summary>
/// 创建 <see cref="LatestArticleList"/>
/// </summary>
/// <param name="page">分页页码</param>
/// <param name="returnPageCount">是否返回总页数</param>
/// <param name="returnFirstCoverImage">是否返回第一篇文章封面图</param>
/// <param name="dbContext"><see cref="KeylolDbContext"/></param>
/// <param name="cachedData"><see cref="CachedDataProvider"/></param>
/// <returns>Item1 表示 <see cref="LatestArticleList"/>，Item2 表示总页数，Item3 表示第一篇文章封面图</returns>
public static async Task <Tuple <LatestArticleList, int, string> > CreateAsync(int page, bool returnPageCount,
bool returnFirstCoverImage, KeylolDbContext dbContext, CachedDataProvider cachedData)
{
var conditionQuery = from article in dbContext.Articles
where article.Rejected == false && article.Archived == ArchivedState.None
orderby article.Sid descending
select article;
var queryResult = await conditionQuery.Select(a => new
{
Count = returnPageCount ? conditionQuery.Count() : 1,
CoverImage = returnFirstCoverImage ? a.CoverImage : null,
a.Id,
a.SidForAuthor,
a.Title,
a.PublishTime,
AuthorIdCode = a.Author.IdCode,
AuthorAvatarImage = a.Author.AvatarImage,
AuthorUserName = a.Author.UserName,
PointIdCode = a.TargetPoint.IdCode,
PointType = a.TargetPoint.Type,
PointAvatarImage = a.TargetPoint.AvatarImage,
PointChineseName = a.TargetPoint.ChineseName,
PointEnglishName = a.TargetPoint.EnglishName
}).TakePage(page, RecordsPerPage).ToListAsync();
var result = new LatestArticleList(queryResult.Count);
foreach (var a in queryResult)
{
result.Add(new LatestArticle
{
LikeCount = await cachedData.Likes.GetTargetLikeCountAsync(a.Id, LikeTargetType.Article),
CommentCount = await cachedData.ArticleComments.GetArticleCommentCountAsync(a.Id),
SidForAuthor = a.SidForAuthor,
Title = a.Title,
PublishTime = a.PublishTime,
AuthorIdCode = a.AuthorIdCode,
AuthorAvatarImage = a.AuthorAvatarImage,
AuthorUserName = a.AuthorUserName,
PointIdCode = a.PointIdCode,
PointAvatarImage = a.PointAvatarImage,
PointType = a.PointType,
PointChineseName = a.PointChineseName,
PointEnglishName = a.PointEnglishName
});
}
var firstRecord = queryResult.FirstOrDefault(r => !string.IsNullOrWhiteSpace(r.CoverImage));
return(new Tuple <LatestArticleList, int, string>(
result,
(int)Math.Ceiling(firstRecord?.Count / (double)RecordsPerPage ?? 1),
firstRecord?.CoverImage));
}
