public async Task <bool> UpdatePrediction(ChannelPublishPrediction channelPublishPrediction)
{
var result = await _col.ReplaceOneAsync(
c => c.Id == channelPublishPrediction.Id,
channelPublishPrediction, new ReplaceOptions
{
IsUpsert = true
});
var updateSuccessful = result.ModifiedCount == 1;
return(updateSuccessful);
}
protected override async Task ExecuteAsync(CancellationToken stoppingToken)
{
// read all channel ids
//var channels = await _channelRepository.GetAllChannelIdAndTitle();
var channels = new List <Channel> {
new Channel() with {
Id = "UCBo9TLJiZ5HI5CXFsCxOhmA"
}
};
_logger.LogInformation(
$"{channels.Count} channels will be inspected for publish schedules"
);
foreach (var channel in channels)
{
try
{
_logger.LogInformation(channel.Id);
// aggregate the channel video views of this channel per
// timeframes (day of week, hour of day)
var result = await _aggregateVideoPublishTimesUseCase.Handle(
new AggregateVideoPublishTimesRequest(
channel.Id
)
);
var items = new List <VideoPublishAggregationItem>();
foreach (var daysOfWeek in result.Aggregation)
{
foreach (var hourOfDay in daysOfWeek.Value)
{
var item = new VideoPublishAggregationItem()
{
DayOfTheWeek = (int)daysOfWeek.Key,
HourOfTheDay = hourOfDay.Key,
PublishedVideos = hourOfDay.Value
};
items.Add(item);
}
}
if (items.Count == 0)
{
_logger.LogInformation($"No uploads for channel {channel.Id} within the last 4 month");
continue;
}
var average = items.Sum(i => i.PublishedVideos) / items.Count;
var sortedByDeviation = items
.Select(item => new PublishSchedulePrediction(
item,
item.PublishedVideos / average))
.OrderByDescending(item => item.DeviationFromAverage)
.Where(i => i.DeviationFromAverage > average)
.Take(5)
.ToList();
var mergedNeighbors = MergeNeighbors(sortedByDeviation);
var gradient = 1 - average / mergedNeighbors.First().DeviationFromAverage;
var channelResult = new ChannelPublishPrediction(
channel.Id,
channel.Title,
average,
mergedNeighbors,
gradient);
var updatePredictionSuccessful =
await _channelPublishPredictionRepository.UpdatePrediction(channelResult);
if (!updatePredictionSuccessful)
{
_logger.LogWarning($"Updating publish prediction for channel {channel.Id} was not successful");
}
}
catch (Exception e)
{
_logger.LogError(e.ToString(), e.InnerException);
}
}
}
