/*
* Process road sensor data
* Outside temperature <= 0 then show informational notification with snowy icon (priority 0)
* Humidity level between 40 and 60 then show informational notification with cloudy icon (priority 0)
* Humidity level > 60 then show informational notification with rainy icon (priority 0)
* In other case show an informational notification with sunny icon (priority 0)
*/
void ProcessRoadSensor(Model.RoadSensor sensor, LocationEventArgs args)
{
//Displays the outside temperature
string content = string.Format("The outdoor temperature is {0} degres. ", sensor.currentEnviromentTemperature);
string imagePath = null;
var notification = new Model.Notification(Model.Notification.Type.Weather, "Weather", content, imagePath, 0);
if (sensor.currentEnviromentTemperature <= 0)
{
notification.imagePath = "snow4";
}
else if (sensor.humidityLevel >= 40 && sensor.humidityLevel <= 60)
{
notification.imagePath = "cloudy2";
}
else if (sensor.humidityLevel > 60)
{
notification.imagePath = "shower3";
}
else
{
notification.imagePath = "sunny";
}
//Show notification
DependencyService.Get <INotification>().SendCollapsedNotification(notification);
}
/*
* Process traffic lane sensor data
* Displays a warning (priority 2) when high traffic and average speed < 40 km/h
*/
void ProcessTraficLaneSensor(Model.TrafficLaneSensor sensor, LocationEventArgs args)
{
if (sensor.crossingsCounter5Minutes < 20 && sensor.averageSpeed < 40)
{
DependencyService.Get <INotification>().SendDefaultNotification(new Model.Notification(Model.Notification.Type.TrafficJam, "Traffic jam", "There is a traffic jam ahead.", 2));
}
}
/*
* Retrieves sensor data from the backend for every supported sensor type
*/
void GetSensorData(LocationEventArgs args)
{
GetRoadSensorData(args);
GetLaneSensorData(args);
GetLightSensorData(args);
GetEnvSensorData(args);
}
/*
* Process traffic light sensor data
* Displays a warning (priority 1) with the current traffic light state (red or green)
*/
void ProcessTrafficLightSensor(Model.TrafficLightSensor sensor, LocationEventArgs args)
{
if (sensor.trafficLightState.Equals("red"))
{
DependencyService.Get <INotification>().SendDefaultNotification(new Model.Notification(Model.Notification.Type.TrafficLight, "Traffic light", "Traffic light is red.", 1));
}
else if (sensor.trafficLightState.Equals("green"))
{
DependencyService.Get <INotification>().SendDefaultNotification(new Model.Notification(Model.Notification.Type.TrafficLight, "Traffic light", "Traffic light is green.", 1));
}
}
/*
* Process environmental sensor data
* Active oxygen > 200ppm then warning (priority 1)
* Carbon monoxide > 200 ppm then alert (priority 3)
* Carbon dioxide > 200 ppm then warning (priority 2)
*/
void ProcessEnvirontmentalSensor(Model.EnviromentalSensor sensor, LocationEventArgs args)
{
if (sensor.activeOxygen > 200)
{
DependencyService.Get <INotification>().SendDefaultNotification(new Model.Notification(Model.Notification.Type.OxygenPollution, "Pollution warning", "Oxygen has exceeded the threshold of 200 ppm", 1));
}
if (sensor.carbonMonoxidePPM > 200)
{
DependencyService.Get <INotification>().SendDefaultNotification(new Model.Notification(Model.Notification.Type.OxygenPollution, "Pollution warning", "Carbon monoxide has exceeded the threshold of 200 ppm", 3));
}
if (sensor.carbonDioxidePPM > 200)
{
DependencyService.Get <INotification>().SendDefaultNotification(new Model.Notification(Model.Notification.Type.OxygenPollution, "Pollution warning", "Carbon dioxide has exceeded the threshold of 200 ppm", 2));
}
}
/*
* Retrieves the environmental sensor data from the backend
* Radius: 1000m
* Parameter: gps position
*/
async void GetEnvSensorData(LocationEventArgs args)
{
//Enabled in settings?
if (!EnabledNotifications.pollution)
{
return;
}
//Backend script location
string uri = "http://mobiheaven.de/digital-city/index.php?lat=" + args.Latitude.ToString().Replace(",", ".")
+ "&long=" + args.Longitude.ToString().Replace(",", ".") + "&radius=";
uri += "1000";
uri += "&type=envSensor";
var response = await client.GetAsync(new Uri(uri));
if (response.IsSuccessStatusCode)
{
string body = await response.Content.ReadAsStringAsync();
//Converts the json object to a c# representation
var collection = JsonConvert.DeserializeObject <Model.SensorCollection>(body);
Random random = new Random();
//If any results then process a random sensor data
if (collection.envSensors.Length > 0)
{
ProcessEnvirontmentalSensor(collection.envSensors[random.Next(collection.envSensors.Length)], args);
}
}
//Error handling
else
{
DependencyService.Get <INotification>().SendDefaultNotification(new Model.Notification(Model.Notification.Type.Issue, "Warning", "There is an issue with the connection", 3));
}
}
/*
* This function is called every gps position update
*/
void LocationUpdateHandler(object sender, LocationEventArgs e)
{
//Error handling
if (e == null)
{
DependencyService.Get <INotification>().SendDefaultNotification(new Model.Notification(Model.Notification.Type.Issue, "Warning", "There is an issue with the location service", 3));
return;
}
//Android: Stops location service, retrieves sensor data form backend and starts the location service again
if (Device.RuntimePlatform == Device.Android)
{
DependencyService.Get <ILocationManager>().StopLocationUpdates();
GetSensorData(e);
DependencyService.Get <ILocationManager>().StartLocationUpdates();
}
//iOS: Retrieves sensord data from backend
else if (Device.RuntimePlatform == Device.iOS)
{
GetSensorData(e);
}
}