public bool ProcessNetworkCache(TwitNetworkCache requestCache, ListEpisodesResponse listAllEpisodes)
{
foreach (Episode episode in listAllEpisodes.episodes)
{
foreach (Show show in episode._embedded.shows)
{
TwitNetworkShowCache thisShow;
if (requestCache.ContainsShow(show.id))
{
_logger.Debug("Show {0} is already in the network cache", show.label);
thisShow = requestCache.GetCacheEntry(show.id);
}
else
{
if (requestCache.TryAdd(show))
{
_logger.Debug("Show {0} has been added to the network cache", show.label);
thisShow = requestCache.GetCacheEntry(show.id);
}
else
{
_logger.Warn("Show {0} cannot be added to the network cache", show.label);
continue;
}
}
if (thisShow.HasEpisode(episode.id))
{
_logger.Debug("{0} episode {1} ({2}) is already in the network cache", show.label, episode.episodeNumber, episode.label);
}
else
{
_logger.Debug("{0} episode {1} ({2}) has been added to the cache", show.label, episode.episodeNumber, episode.label);
thisShow.AddEpisode(episode);
}
}
}
return(true);
}
/// <summary>
/// Chain populates the episode cache.
/// </summary>
/// <param name="requestCache">An instance of the TWiT network cache</param>
/// <param name="requestDays">Number of day to request in the API call</param>
/// <param name="requestLimit">Number of API calls allowed in a minute</param>
/// <param name="cancellationToken"></param>
/// <returns>If a successful cache refresh was performed</returns>
public async Task <bool> PopulateNetworkCache(TwitNetworkCache requestCache, int requestDays, int requestLimit, CancellationToken cancellationToken)
{
TimeSpan updateInterval = (DateTime.Now - requestCache.LastUpdated);
if (requestDays > requestCache.RequestDays)
{
_logger.Info("TWiT network cache does not contain enough requested days");
}
else if (updateInterval.TotalHours < 1)
{
_logger.Info("TWiT network cache is valid and does not require updating yet");
return(false);
}
else
{
_logger.Info("TWiT network cache is old and requires an update");
}
long requestDaysAgoAsEpoch = GetEpochDate(requestDays);
var apiUrl = String.Format("https://twit.tv/api/v1.0/episodes?filter[airingDate][value]={0}&filter[airingDate][operator]={1}", requestDaysAgoAsEpoch, ">=");
int callCount = 0;
while (true)
{
if (cancellationToken.IsCancellationRequested)
{
_logger.Info("Stopping API requests due to cancellation request");
return(false);
}
// Prevent requesting nothing
if (string.IsNullOrEmpty(apiUrl))
{
_logger.Debug("Empty apiUrl, halting requests.");
return(true);
}
// Issue the API request and serialize the result for usage
var responseStream = await TwitNetworkApiRequest(apiUrl).ConfigureAwait(false);
_logger.Debug("Got responseStream [{0}]", apiUrl);
var listAllEpisodes = _jsonSerializer.DeserializeFromStream <ListEpisodesResponse>(responseStream);
_logger.Debug("Deserialized the responseStream, processing Network Update");
try
{
// Process the network cache update
if (ProcessNetworkCache(requestCache, listAllEpisodes))
{
_logger.Debug("Successfully updated TWiT Network cache with this call");
}
else
{
_logger.Debug("Unable to update TWiT Network cache with this call");
}
// See if we we have reached the end of the needed API calls
if (listAllEpisodes._links.next != null)
{
listAllEpisodes._links.next.TryGetValue("href", out apiUrl);
_logger.Debug("Next href is {0}", apiUrl);
}
else
{
_logger.Info("TWiT network cache update is complete");
requestCache.MarkCacheComplete(requestDays);
return(true);
}
}
catch (Exception ex)
{
_logger.Debug("Error when processing the network update: {0}", ex.Message);
return(false);
}
// Iterate the counter, then if the next call will exceed the limit, wait a minute before the next call
callCount++;
if ((callCount % requestLimit) == 0)
{
_logger.Debug("Waiting for the next request to be sent due to request limit");
for (int iter = 0; iter < 60; iter++)
{
if (cancellationToken.IsCancellationRequested)
{
iter = 60;
}
else
{
Thread.Sleep(1000);
}
}
}
}
}