public static Predicate <CityFeed> DeltaShowsAqiIsHigher(Document feedDoc) { var feed = CityFeedDocument.ToDTO(feedDoc); if (feedDoc.ContainsKey(CityFeedDocument.FieldDeltaAqi)) { return(feed => feedDoc[CityFeedDocument.FieldDeltaAqi].AsInt() > 0); } return((feed) => true); }
/// <summary> /// A simple function that takes a string and does a ToUpper /// </summary> /// <param name="input"></param> /// <param name="context"></param> /// <returns></returns> public async Task <string> FunctionHandler(DynamoDBEvent dynamoDBEvent, ILambdaContext context) { snsClient = new AmazonSimpleNotificationServiceClient(); foreach (var record in dynamoDBEvent.Records) { var dynamoDocument = Document.FromAttributeMap(record.Dynamodb.NewImage); CityFeed feed = CityFeedDocument.ToDTO(dynamoDocument); if (feed == null) { System.Console.WriteLine("Streamed had no new data"); continue; } System.Console.WriteLine($"Feed Object:{feed}"); System.Console.WriteLine($"Accessed stream: {feed.CityName}"); var msg = NotificationFormatter.GetTwitterMessageSpanish(feed); await publishToGeneral(NotificationFormatter.GetSimpleMessage(feed)); await publishToTwitter(msg); } return(""); }
public async Task <string> AsyncExecute(System.IO.Stream input, ILambdaContext context) { _ = input; // discard var waqiProxy = Waqi.create(_token); var cities = JsonSerializer.Deserialize <List <Latincoder.AirQuality.Model.Config.City> >(_citiesRaw); // default C# serialization // process multiple cities var stationFeedsByCity = from city in cities from station in city.Stations let feed = new { Uri = $"{city.Country}/{city.Name}/{station}", CityName = city.Name } group feed by $"{city.Country}-{city.Name}" into stationsByCity select stationsByCity; var cityFeedsDTO = new List <CityFeed>(); foreach (var cityFeeds in stationFeedsByCity) { var feeds = from value in cityFeeds select value.Uri; var stationFeedsObtained = new List <WaqiCityFeed>(); foreach (var feed in feeds) { System.Console.WriteLine($"Requesting feed for:{feed}"); string mutableString = string.Empty; try { mutableString = await waqiProxy.getCityFeed(feed); if (mutableString != string.Empty) { System.Console.WriteLine("found this result:\n"); System.Console.WriteLine(mutableString); var wcf = JsonSerializer.Deserialize <WaqiCityFeed>(mutableString); stationFeedsObtained.Add(wcf); } } catch (Exception e) { System.Console.WriteLine(e); } } try { cityFeedsDTO.Add(CityFeed.From(stationFeedsObtained)); } catch (Exception e) { System.Console.WriteLine(e); } } var aqiTable = Table.LoadTable(_dynamoClient, _AqiTableName); var notificationIsUrgent = NotificationValidator.CreateyValidator(); notificationIsUrgent.AddRules(Rules.AqiAboveUnhealthyThreshold); // store in DynamoDB if meets notification criteria foreach (var feed in cityFeedsDTO) { // Gather previous and new feeds var prevFeedDoc = await aqiTable.GetItemAsync(CityFeedDocument.PartitionKeyName); var newFeed = prevFeedDoc != null? CityFeedDocument.From(feed, prevFeedDoc[CityFeedDocument.FieldMaxAqi].AsInt()) : CityFeedDocument.From(feed); // if no previous stuff if (prevFeedDoc == null) { Console.WriteLine($"FIRST TIME: Store in dynamo now for {feed.CityName}"); await aqiTable.PutItemAsync(newFeed); continue; } var prevFeed = CityFeedDocument.ToDTO(prevFeedDoc); // each feed will has a custom validator with it's own criteria since this is done per city var notificationIsNotSpam = NotificationValidator.CreateyValidator(); // spam means max aqi changed at least by 5 points, and is at least 20 minutes apart frm last notification notificationIsNotSpam.AddRules( Rules.MinutesApartFrom(prevFeed, 30), Rules.AbsoluteAqiChangedBy(prevFeed, 5)); // urgent or meets criteria if (notificationIsUrgent.MeetsGlobalCriteria(feed) && notificationIsNotSpam.MeetsGlobalCriteria(feed)) { Console.WriteLine($"Store in dynamo now for {feed.CityName}"); await aqiTable.PutItemAsync(newFeed); } else { Console.WriteLine("Does not meet rules..."); } } return("done"); }