public async Task <ChannelStored> GetAndUpdateChannel(string id)
{
var c = await Channels.Get(id);
var lastUpdated = c?.Latest?.Stats?.Updated;
var needsNewStats = lastUpdated == null || Expired(lastUpdated.Value, RCfg.RefreshChannel);
if (!needsNewStats)
{
return(c);
}
var channelData = await Yt.ChannelData(id);
if (c == null)
{
c = new ChannelStored {
Latest = channelData
}
}
;
else
{
c.SetLatest(channelData);
}
await Channels.Set(c);
return(c);
}
public async Task <RecommendedVideoStored> GetAndUpdateRecommendedVideos(ChannelVideoListItem v)
{
var rv = await RecommendedVideosCollection.Get(v.VideoId);
var age = RecommendedRefreshAge(v);
var needsUpdate = rv == null || Expired(rv.Updated, age);
if (!needsUpdate)
{
return(rv);
}
if (rv == null)
{
rv = new RecommendedVideoStored {
VideoId = v.VideoId, VideoTitle = v.VideoTitle, Updated = DateTime.UtcNow
}
}
;
var created = await Yt.GetRelatedVideos(v.VideoId);
rv.Recommended.Add(new RecommendedVideos {
Updated = DateTime.UtcNow, Top = RCfg.Related, Recommended = created
});
rv.Updated = DateTime.UtcNow;
await RecommendedVideosCollection.Set(rv);
return(rv);
}
public void Print(int n, double t)
{
Console.Write($"{n,3} |{t:0.00} |");
Console.Write($"(");
for (int i = 0; i < Vector.Dimension; i++)
{
Yn.v[i] = Yt[i](t);
Console.Write($"{Yn.v[i]:0.00}| ");
}
Console.Write($")| ");
Console.Write($"(");
for (int i = 0; i < Vector.Dimension; i++)
{
Console.Write($"{Un.v[i]:0.00}| ");
}
Console.Write($")| ");
double dy = new Vector(Yn - Un).Norm;
Console.Write($"{dy:0.00}\n");
Uprev = Un;
n++;
}
public HorizontalThrowModelingResultViewModel(
Tuple <List <double>, List <Tuple <double, double> >, List <Tuple <double, double> > > numericValues)
{
List <double> ts = numericValues.Item1;
List <Tuple <double, double> > xy = numericValues.Item2, vs = numericValues.Item3;
for (int i = 0; i < ts.Count; ++i)
{
Yt.Add(new ObservablePoint(ts[i], xy[i].Item2));
Xt.Add(new ObservablePoint(ts[i], xy[i].Item1));
Yx.Add(new ObservablePoint(xy[i].Item1, xy[i].Item2));
Vxt.Add(new ObservablePoint(ts[i], vs[i].Item1));
Vyt.Add(new ObservablePoint(ts[i], vs[i].Item2));
}
Collection.Add(new LineSeries()
{
Values = Yx
});
}
/// <summary>
/// Gets the video with that ID. Caches in S3 (including historical information) with this
/// </summary>
public async Task <(VideoStored Video, UpdateStatus Status)> GetAndUpdateVideo(string id)
{
var v = await Videos.Get(id);
if (v != null && v.Latest.Updated == default(DateTime))
{
v.Latest.Updated = v.Latest.Stats.Updated;
}
var status = v == null ? UpdateStatus.Created : UpdateStatus.Updated;
var needsNewStats = v == null || Expired(v.Latest.Updated, VideoRefreshAge(v.Latest));
if (!needsNewStats)
{
return(v, status);
}
var videoData = await Yt.VideoData(id);
if (videoData != null)
{
if (v == null)
{
v = new VideoStored {
Latest = videoData
}
}
;
else
{
v.SetLatest(videoData);
}
v.Latest.Updated = DateTime.UtcNow;
}
if (v != null)
{
await Videos.Set(v);
}
return(v, status);
}
public async Task <ChannelVideosStored> GetAndUpdateChannelVideos(ChannelData c)
{
var cv = await ChannelVideosCollection.Get(c.Id);
// fix updated if missing. Remove once all records have been updated
var mostRecent = cv?.Vids.OrderByDescending(v => v.Updated).FirstOrDefault();
if (cv != null && mostRecent != null && cv.Updated == default(DateTime))
{
cv.Updated = mostRecent.Updated;
}
var needsUpdate = cv == null || Expired(cv.Updated, RCfg.RefreshChannelVideos) ||
cv.From != RCfg.From; // when from is chaged, update all videos
if (!needsUpdate)
{
return(cv);
}
if (cv == null)
{
cv = new ChannelVideosStored {
ChannelId = c.Id, ChannelTitle = c.Title, Updated = DateTime.UtcNow
}
}
;
else
{
cv.Updated = DateTime.UtcNow;
}
var queryForm = cv.From != RCfg.From ? RCfg.From : mostRecent?.PublishedAt ?? RCfg.From;
var created = await Yt.VideosInChannel(c, queryForm, RCfg.To);
cv.Vids.AddRange(created);
cv.From = RCfg.From;
await ChannelVideosCollection.Set(cv);
return(cv);
}
public async Task <RecommendedVideoStored> GetAndUpdateRecommendedVideos(ChannelVideoListItem v)
{
var rv = await RecommendedVideosCollection.Get(v.VideoId);
if (Expired(v.PublishedAt, RCfg.VideoDead))
{
return(rv);
}
//var mostRecent = rv?.Recommended.OrderByDescending(r => r.Updated).FirstOrDefault();
var needsUpdate = rv == null || Expired(rv.Updated, RCfg.RefreshRelatedVideos);
if (!needsUpdate)
{
return(rv);
}
if (rv == null)
{
rv = new RecommendedVideoStored {
VideoId = v.VideoId, VideoTitle = v.VideoTitle, Updated = DateTime.UtcNow
}
}
;
var created = await Yt.GetRelatedVideos(v.VideoId);
rv.Recommended.Add(new RecommendedVideos {
Updated = DateTime.UtcNow, Top = RCfg.Related, Recommended = created
});
rv.Updated = DateTime.UtcNow;
await RecommendedVideosCollection.Set(rv);
return(rv);
}
YoutubeClient ytScaper = new YoutubeClient();
public void Eiler()
{
Console.Write($"n tn yn* un ||Yn-Un*||\n");
Console.Write($"{1,3} |{t0:0.00} |");
Console.Write($"(");
for (int i = 0; i < Vector.Dimension; i++)
{
Y0.v[i] = Yt[i](0);
Console.Write($"{Y0.v[i]:0.00}| ");
}
Console.Write($")| ");
Console.Write($"(");
for (int i = 0; i < Vector.Dimension; i++)
{
Console.Write($"{U0.v[i]:0.00}| ");
}
Console.Write($")| ");
double dy = new Vector(Y0 - U0).Norm;
Console.Write($"{dy:0.00}\n");
//вывод нулевой шапки
Console.Write($"{2,3} |{h:0.00} |");
Console.Write($"(");
for (int i = 0; i < Vector.Dimension; i++)
{
Yn.v[i] = Yt[i](h);
Console.Write($"{Yn.v[i]:0.00}| ");
}
Console.Write($")| ");
Console.Write($"(");
for (int i = 0; i < Vector.Dimension; i++)
{
Console.Write($"{Un.v[i]:0.00}| ");
}
Console.Write($")| ");
dy = new Vector(Yn - Un).Norm;
Console.Write($"{dy:0.00}\n");
//вывод 1й шапки
int n = 2;
for (double t = t0 + 2 * h; t <= tmax || Math.Abs(t - tmax) / t <= 1e-7; t = t + h)
{
Un = Uprev + F(t - h, Uprev) * h;
//Console.Write($"{n,3} |{t:0.00} |");
//Console.Write($"(");
//for (int i = 0; i < Vector.Dimension; i++)
//{
// Yn.v[i] = Yt[i](t);
// Console.Write($"{Yn.v[i]:0.00}| ");
//}
//Console.Write($")| ");
//Console.Write($"(");
//for (int i = 0; i < Vector.Dimension; i++)
//{
// Console.Write($"{Un.v[i]:0.00}| ");
//}
//Console.Write($")| ");
//dy = new Vector(Yn - Un).Norm;
//Console.Write($"{dy:0.00}\n");
Print(n, t);
Uprev = Un;
n++;
}
}
