public static async Task Run(
[QueueTrigger("visionscanner")] string tweetQuery,
[Table("visiontweet")] CloudTable visionTweetTable,
[Queue("visionscanned")] IAsyncCollector <string> visionScannedQueue,
TraceWriter log)
{
log.Info($"VisionScanner processing TweetId: {tweetQuery}");
long tweetId = long.Parse(tweetQuery);
long originalTweetId = tweetId;
List <string> screenNamesToReplyTo = new List <string>();
var service = Helper.TwitterService();
TwitterStatus tweet = null;
TweetEntity tweetEntity = null;
while (tweet == null)
{
//moving this check inside the while loop to stop processing retweets
var tweetDetails = Helper.FetchTweetFromStorage(tweetId.ToString());
if (tweetDetails != null) //already processed
{
log.Info($"VisionScanner Already Processed TweetId: {tweetId}");
return;
}
tweet = service.GetTweet(new GetTweetOptions
{
Id = tweetId,
IncludeEntities = true,
TweetMode = TweetMode.Extended
});
//build up mentions list for replyto - will distinct later
screenNamesToReplyTo.Add("@" + tweet.User.ScreenName);
foreach (var mention in tweet.Entities.Mentions)
{
screenNamesToReplyTo.Add("@" + mention.ScreenName);
}
tweetEntity = new TweetEntity(tweet);
//no media? try the parent
if (!tweet.Entities.Media.Any())
{
log.Info($"VisionScanner No media found in TweetId: {tweetQuery}");
// Documentation Link: Add an entity to a table - https://cda.ms/nn
visionTweetTable.Execute(TableOperation.Insert(tweetEntity));
if (tweet.InReplyToStatusId == null)
{
//walked up the whole chain - no media found
return;
}
else
{
tweetId = ((long)tweet.InReplyToStatusId);
tweet = null;
}
}
}
var mediaDesc = new MediaDescription(tweet.Id);
var photos = tweet.Entities.Media.Where(m => m.MediaType == TwitterMediaType.Photo);
foreach (var media in photos)
{
log.Info($"VisionScanner FetchVisionDescriptionAsync TweetId/MediaId: {tweetQuery}/{media.Id}");
var vision = await Helper.FetchVisionDescriptionAsync(tweet, media);
mediaDesc.VisionDescription.Add(media.IdAsString, vision);
}
tweetEntity.VisionJson = JsonConvert.SerializeObject(mediaDesc);
// Documentation Link: Add an entity to a table - https://cda.ms/nn
visionTweetTable.Execute(TableOperation.Insert(tweetEntity));
var dto = new TweetScannedDTO
{
TwitterStatus = tweetEntity.BuildTwitterStatus(),
OriginalTweetId = originalTweetId,
UsersToReplyTo = screenNamesToReplyTo.Distinct().ToArray(),
MediaDescription = mediaDesc
};
log.Info($"VisionScanner Queuing VisionScanned TweetId: {tweetQuery}");
await visionScannedQueue.AddAsync(JsonConvert.SerializeObject(dto));
log.Info($"VisionScanner processed TweetId: {tweetQuery}");
}
