async Task <SubscriptionFeedUpdateResult> GetFeedResultAsync(SubscriptionSourceEntity entity)
{
try
{
var videos = entity.SourceType switch
{
SubscriptionSourceType.Mylist => await GetMylistFeedResult(entity.SourceParameter, _mylistProvider),
SubscriptionSourceType.User => await GetUserVideosFeedResult(entity.SourceParameter, _userProvider),
SubscriptionSourceType.Channel => await GetChannelVideosFeedResult(entity.SourceParameter, _channelProvider, _nicoVideoProvider),
SubscriptionSourceType.Series => await GetSeriesVideosFeedResult(entity.SourceParameter, _seriesRepository),
SubscriptionSourceType.SearchWithKeyword => await GetKeywordSearchFeedResult(entity.SourceParameter, _searchProvider),
SubscriptionSourceType.SearchWithTag => await GetTagSearchFeedResult(entity.SourceParameter, _searchProvider),
_ => throw new NotSupportedException(entity.SourceType.ToString())
};
return(new SubscriptionFeedUpdateResult()
{
IsSuccessed = true,
Videos = videos,
Entity = entity
});
}
catch (Exception e)
{
Debug.WriteLine(e.ToString());
return(new SubscriptionFeedUpdateResult()
{
IsSuccessed = false,
Videos = new List <NicoVideo>(),
Entity = entity
});
}
}
public SubscriptionFeedResult MargeFeedResult(SubscriptionFeedResult target, SubscriptionSourceEntity source, IList <NicoVideo> videos)
{
var result = target ?? _collection.FindOne(x => x.SourceType == source.SourceType && x.SourceParamater == source.SourceParameter);
if (result == null)
{
result = new SubscriptionFeedResult()
{
Id = ObjectId.NewObjectId(),
SourceType = source.SourceType,
SourceParamater = source.SourceParameter,
Videos = videos.Select(ToFeedResultVideoItem).ToList(),
LastUpdatedAt = DateTime.Now
};
_collection.Insert(result);
return(result);
}
else
{
// 前回更新分までのIdsと新規分のIdの差集合を取る
var ids = result.Videos.Select(x => x.VideoId).ToHashSet();
var exceptVideos = videos.Where(x => false == ids.Contains(x.Id));
result.Videos = Enumerable.Concat(exceptVideos.Select(ToFeedResultVideoItem), result.Videos).Take(FeedResultVideosCapacity).ToList();
result.LastUpdatedAt = DateTime.Now;
_collection.Update(result);
return(result);
}
}
SubscriptionSourceEntity AddSubscription_Internal(SubscriptionSourceEntity newEntity)
{
_subscriptionRegistrationRepository.CreateItem(newEntity);
Added?.Invoke(this, newEntity);
return(newEntity);
}
public bool DeleteItem(SubscriptionSourceEntity source)
{
var result = GetFeedResult(source);
if (result != null)
{
return(DeleteItem(result.Id));
}
else
{
return(false);
}
}
public void RemoveSubscription(SubscriptionSourceEntity entity)
{
var registrationRemoved = _subscriptionRegistrationRepository.DeleteItem(entity.Id);
Debug.WriteLine("[SubscriptionSource Remove] registration removed: " + registrationRemoved);
var feedResultRemoved = _subscriptionFeedResultRepository.DeleteItem(entity.Id);
Debug.WriteLine("[SubscriptionSource Remove] feed result removed: " + feedResultRemoved);
if (registrationRemoved || feedResultRemoved)
{
Removed?.Invoke(this, entity);
}
}
public async Task <bool> RefreshFeedUpdateResultAsync(SubscriptionSourceEntity entity, CancellationToken cancellationToken = default)
{
var prevResult = _subscriptionFeedResultRepository.GetFeedResult(entity);
if (prevResult != null && !IsExpiredFeedResultUpdatedTime(prevResult.LastUpdatedAt))
{
// 前回更新から時間経っていない場合はスキップする
Debug.WriteLine("[FeedUpdate] update skip: " + entity.Label);
return(false);
}
Debug.WriteLine("[FeedUpdate] start: " + entity.Label);
// オンラインソースから情報を取得して
var result = await GetFeedResultAsync(entity);
cancellationToken.ThrowIfCancellationRequested();
// 新規動画を抽出する
// 初回更新時は新着抽出をスキップする
if (prevResult != null)
{
var prevContainVideoIds = prevResult.Videos.Select(x => x.VideoId).ToHashSet();
var newVideos = result.Videos.TakeWhile(x => !prevContainVideoIds.Contains(x.Id));
result.NewVideos = newVideos.ToList();
}
else
{
result.NewVideos = new List <NicoVideo>();
}
// 成功したら前回までの内容に追記して保存する
if (result.IsSuccessed && (result.Videos?.Any() ?? false))
{
var updatedResult = _subscriptionFeedResultRepository.MargeFeedResult(prevResult, entity, result.Videos);
}
// 更新を通知する
Updated?.Invoke(this, result);
Debug.WriteLine("[FeedUpdate] complete: " + entity.Label);
return(true);
}
public void UpdateSubscription(SubscriptionSourceEntity entity)
{
_subscriptionRegistrationRepository.UpdateItem(entity);
}
public SubscriptionFeedResult GetFeedResult(SubscriptionSourceEntity source)
{
return(_collection.FindOne(x => x.SourceType == source.SourceType && x.SourceParamater == source.SourceParameter));
}