/// <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="OnSalePointList"/>
/// </summary>
/// <param name="currentUserId">当前登录用户 ID</param>
/// <param name="page">分页页码</param>
/// <param name="returnPageCount">是否返回总页数</param>
/// <param name="returnFirstHeaderImage">是否返回第一个据点头部图</param>
/// <param name="dbContext"><see cref="KeylolDbContext"/></param>
/// <param name="cachedData"><see cref="CachedDataProvider"/></param>
/// <returns>Item1 表示 <see cref="OnSalePointList"/>，Item2 表示总页数，Item3 表示第一个据点头部图，Item4 表示第二个据点头部图</returns>
public static async Task <Tuple <OnSalePointList, int, string, string> > CreateAsync(string currentUserId, int page,
bool returnPageCount, bool returnFirstHeaderImage, KeylolDbContext dbContext, CachedDataProvider cachedData)
{
SteamCrawlerProvider.UpdateOnSalePoints();
var conditionQuery = from feed in dbContext.Feeds
where feed.StreamName == OnSalePointStream.Name
join point in dbContext.Points on feed.Entry equals point.Id
orderby feed.Id descending
select point;
var queryResult = await conditionQuery.Select(p => new
{
Count = returnPageCount ? conditionQuery.Count() : 1,
HeaderImage = returnFirstHeaderImage ? p.HeaderImage : null,
p.Id,
p.IdCode,
p.ThumbnailImage,
p.ChineseName,
p.EnglishName,
p.SteamPrice,
p.SteamDiscountedPrice,
p.SteamAppId
}).TakePage(page, RecordsPerPage).ToListAsync();
var result = new OnSalePointList(queryResult.Count);
foreach (var p in queryResult)
{
result.Add(new PointBasicInfo
{
IdCode = p.IdCode,
ThumbnailImage = p.ThumbnailImage,
ChineseName = p.ChineseName,
EnglishName = p.EnglishName,
AverageRating = (await cachedData.Points.GetRatingsAsync(p.Id)).AverageRating,
SteamPrice = p.SteamPrice,
SteamDiscountedPrice = p.SteamDiscountedPrice,
InLibrary = string.IsNullOrWhiteSpace(currentUserId) || p.SteamAppId == null
? (bool?)null
: await cachedData.Users.IsSteamAppInLibraryAsync(currentUserId, p.SteamAppId.Value)
});
}
var pointWithHeaders = queryResult.Where(r => !string.IsNullOrWhiteSpace(r.HeaderImage)).ToList();
var firstRecord = pointWithHeaders.FirstOrDefault();
var secondRecord = pointWithHeaders.Skip(1).FirstOrDefault();
return(new Tuple <OnSalePointList, int, string, string>(
result,
(int)Math.Ceiling(firstRecord?.Count / (double)RecordsPerPage ?? 1),
firstRecord?.HeaderImage,
secondRecord?.HeaderImage));
}
