Notification and parking zones

Source/ProofOfConcept/Models/ParkingState.cs

@@ -0,0 +1,47 @@
+namespace ProofOfConcept.Models;
+
+public class ParkingState
+{
+    public bool CarParked { get; set; }
+    public bool ParkingInProgress { get; set; }
+    
+    public DateTimeOffset? CarParkedAt { get; set; }
+    public DateTimeOffset? ParkingStartedAt { get; set; }
+    public DateTimeOffset? ParkingStoppedAt { get; set; }
+
+    public void SetCarParked()
+    {
+        if (!CarParked)
+        {
+            CarParked = true;
+            CarParkedAt = DateTimeOffset.Now;
+        }
+    }
+
+    public void SetCarMoved()
+    {
+        if (CarParked)
+        {
+            CarParked = false;
+            CarParkedAt = null;
+        }
+    }
+
+    public void SetParkingStarted()
+    {
+        if (!ParkingInProgress)
+        {
+            ParkingInProgress = true;
+            ParkingStartedAt = DateTimeOffset.Now;
+        }
+    }
+
+    public void SetParkingStopped()
+    {
+        if (ParkingInProgress)
+        {
+            ParkingInProgress = false;
+            ParkingStoppedAt = DateTimeOffset.Now;
+        }
+    }
+}

Source/ProofOfConcept/Models/TeslaState.cs

@@ -0,0 +1,73 @@
+namespace ProofOfConcept.Models;
+
+public class TeslaState
+{
+    private string gear = "";
+    private bool locked;
+    private bool driverSeatOccupied;
+    private bool gpsState;
+    private double latitude;
+    private double longitude;
+
+    public string Gear
+    {
+        get => this.gear;
+        set
+        {
+            this.gear = value;
+            LastUpdate = DateTimeOffset.Now;
+        } 
+    }
+
+    public bool Locked
+    {
+        get => this.locked;
+        set
+        {
+            this.locked = value;
+            LastUpdate = DateTimeOffset.Now;
+        }
+    }
+
+    public bool DriverSeatOccupied
+    {
+        get => this.driverSeatOccupied;
+        set
+        {
+            this.driverSeatOccupied = value;
+            LastUpdate = DateTimeOffset.Now;
+        } 
+    }
+
+    public bool GPSState
+    {
+        get => this.gpsState;
+        set
+        {
+            this.gpsState = value;
+            LastUpdate = DateTimeOffset.Now;
+        }
+    }
+
+    public double Latitude
+    {
+        get => this.latitude;
+        set
+        {
+            this.latitude = value;
+            LastUpdate = DateTimeOffset.Now;
+        } 
+    }
+
+    public double Longitude
+    {
+        get => this.longitude;
+        set
+        {
+            this.longitude = value;
+            LastUpdate = DateTimeOffset.Now;
+        }
+    }
+
+    public DateTimeOffset LastUpdate { get; private set; }
+}

Source/ProofOfConcept/ProofOfConcept.csproj

@@ -21,6 +21,10 @@
         <PackageReference Include="Microsoft.Extensions.Caching.Hybrid" Version="9.7.0" />
         <PackageReference Include="MQTTnet" Version="5.0.1.1416" />
         <PackageReference Include="MQTTnet.Server" Version="5.0.1.1416" />
+        <PackageReference Include="NetTopologySuite" Version="2.6.0" />
+        <PackageReference Include="NetTopologySuite.Features" Version="2.2.0" />
+        <PackageReference Include="NetTopologySuite.IO.GeoJSON" Version="4.0.0" />
+        <PackageReference Include="Pushover" Version="1.0.0" />
         <PackageReference Include="SzakatsA.Result" Version="1.1.0" />
     </ItemGroup>
 
@@ -34,6 +38,9 @@
       <None Update="Resources\Signature\public-key.pem">
         <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
       </None>
+      <None Update="Resources\parking_zones.geojson">
+        <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+      </None>
     </ItemGroup>
 
 </Project>

Source/ProofOfConcept/Services/MQTTClient.cs

@@ -22,9 +22,27 @@ public class MQTTClient : IHostedService
         
         this.client.ApplicationMessageReceivedAsync += (e) =>
         {
-            string message = Encoding.UTF8.GetString(e.ApplicationMessage.Payload);
+            string topic = e.ApplicationMessage.Topic;
+
+            if (topic.IndexOf("/", StringComparison.Ordinal) > 0)
+            {
+                string[] parts = topic.Split('/'); //telemetry/5YJ3E7EB7KF291652/v/Location
+
+                if (parts is ["telemetry", _, "v", _])
+                {
+                    string vin = parts[1];
+                    string field = parts[3];
+            
+                    string? message = Encoding.UTF8.GetString(e.ApplicationMessage.Payload);
                     logger.LogInformation("Message received: {Message}", message);
-            messageProcessor.ProcessMessage(message);
+                    messageProcessor.ProcessMessage(vin, field.ToLowerInvariant(), message.StripQuotes());
+                }
+                else
+                    logger.LogWarning("Topic not passed to message processor: {Topic}", topic);
+            }
+            else
+                logger.LogWarning("Topic not passed to message processor: {Topic}", topic);
+            
             return Task.CompletedTask;
         };
     }
@@ -65,3 +83,5 @@ public class MQTTClientConfiguration
 {
     
 }
+
+file static class StringExtensions { public static string StripQuotes(this string value) => value.Trim('"'); }

Source/ProofOfConcept/Services/MessageProcessor.cs

@@ -1,11 +1,15 @@
+using System.Text.Json;
 using Microsoft.Extensions.Caching.Memory;
 using Microsoft.Extensions.Options;
+using ProofOfConcept.Models;
+using Pushover;
+using SzakatsA.Result;
 
 namespace ProofOfConcept.Services;
 
 public interface IMessageProcessor
 {
-    Task ProcessMessage(string jsonMessage);
+    Task ProcessMessage(string vin, string field, string value);
 }
 
 public class MessageProcessor : IMessageProcessor
@@ -14,22 +18,145 @@ public class MessageProcessor : IMessageProcessor
     private MessageProcessorConfiguration configuration;
 
     private readonly IMemoryCache memoryCache;
+    private readonly ZoneDeterminatorService zoneDeterminatorService;
 
-    public MessageProcessor(ILogger<MessageProcessor> logger, IOptions<MessageProcessorConfiguration> options, IMemoryCache memoryCache)
+    private readonly TeslaState teslaState;
+    private readonly ParkingState parkingState;
+
+    private readonly PushoverClient pushApi;
+    
+    public MessageProcessor(ILogger<MessageProcessor> logger, IOptions<MessageProcessorConfiguration> options, IMemoryCache memoryCache, ZoneDeterminatorService zoneDeterminatorService)
     {
         this.logger = logger;
         this.configuration = options.Value;
 
         this.memoryCache = memoryCache;
+        this.zoneDeterminatorService = zoneDeterminatorService;
+        
+        this.teslaState = new TeslaState();
+        this.parkingState = new ParkingState();
+        
+        this.pushApi = new PushoverClient(this.configuration.PushoverAPIKey);
     }
     
-    public async Task ProcessMessage(string jsonMessage)
+    public async Task ProcessMessage(string vin, string field, string value)
     {
-        this.logger.LogTrace("Processing message from Tesla: {Message}", jsonMessage);
+        this.logger.LogTrace("Processing {Field} = {Value} for {VIN}...", field, value, vin);
+
+        string[] validGears = [ "P", "R", "N", "D", "SNA" ];
+        if (field == "gear" && validGears.Contains(value))
+            this.teslaState.Gear = value;
+        
+        else if (field == "locked" && bool.TryParse(value, out bool locked))
+            this.teslaState.Locked = locked;
+        
+        else if (field == "driverseatoccupied" && bool.TryParse(value, out bool driverSeatOccupied))
+            this.teslaState.DriverSeatOccupied = driverSeatOccupied;
+        
+        else if (field == "location")
+        {
+            try
+            {
+                using var doc = JsonDocument.Parse(value);
+                var root = doc.RootElement;
+
+                this.teslaState.Latitude = root.GetProperty("latitude").GetDouble();
+                this.teslaState.Longitude = root.GetProperty("longitude").GetDouble();
+            }
+            catch (Exception e)
+            {
+                this.logger.LogError("Invalid location data: {LocationValue}", value);
+            }
+        }
+
+        this.logger.LogTrace("State updated");
+
+        if (this.teslaState is { Gear: "P", Locked: true, DriverSeatOccupied: false })
+            this.parkingState.SetCarParked();
+        else
+            this.parkingState.SetCarMoved();
+        
+        if (this.parkingState is { ParkingInProgress: false, CarParked: true })
+            await StartParkingAsync(vin);
+        
+        else if (this.parkingState.ParkingInProgress && (this.teslaState.Gear != "P" || this.teslaState.DriverSeatOccupied || !this.teslaState.Locked))
+            await StopParkingAsync(vin);
+    }
+    
+    private async Task StartParkingAsync(string vin)
+    {
+        //Get parking zone
+        Result<string> zoneLookupResult = await this.zoneDeterminatorService.DetermineZoneCodeAsync(this.teslaState.Latitude, this.teslaState.Longitude);
+        bool sendNotification = this.configuration.VinNotifications.TryGetValue(vin, out string? pushoverToken);
+        
+        if (zoneLookupResult.IsSuccessful)
+        {
+            if (String.IsNullOrWhiteSpace(zoneLookupResult.Value))
+            {
+                // Push not a parking zone
+                if (sendNotification)
+                    this.pushApi.Send(pushoverToken, new PushoverMessage
+                    {
+                        Title = "Nem parkolózóna",
+                        Message = $"Megálltál nem parkoló zónában, a GPS szerint: {this.teslaState.Latitude},{this.teslaState.Longitude}",
+                        Priority = Priority.Normal,
+                        Timestamp = DateTimeOffset.Now.ToLocalTime().ToString(),
+                   });
+                this.logger.LogInformation("Parking started in non-parking zone for {VIN}", vin);
+            }
+
+            // Push parking started in zone
+            this.parkingState.SetParkingStarted();
+            if (sendNotification)
+                this.pushApi.Send(pushoverToken, new PushoverMessage
+                {
+                    Title = $"Parkolás elindult: {zoneLookupResult.Value}",
+                    Message = $"Megálltál egy parkolási zónában, a GPS szerint: {this.teslaState.Latitude},{this.teslaState.Longitude}" + Environment.NewLine +
+                              $"A zónatérkép szerint ez a {zoneLookupResult.Value} jelű zóna",
+                    Priority = Priority.Normal,
+                    Timestamp = DateTimeOffset.Now.ToLocalTime().ToString(),
+                });
+            this.logger.LogInformation("Parking started for {VIN}", vin);
+        }
+        else
+            this.logger.LogError(zoneLookupResult.Exception, "Can't start parking: error while determining parking zone");
+    }
+
+    private async Task StopParkingAsync(string vin)
+    {
+        // Push parking stopped
+        this.parkingState.SetParkingStopped();
+        if (this.configuration.VinNotifications.TryGetValue(vin, out string? pushoverToken))
+            this.pushApi.Send(pushoverToken, new PushoverMessage
+            {
+                Title = $"Parkolás leállt ({DateTimeOffset.Now.Subtract(this.parkingState.ParkingStartedAt!.Value).ToElapsed()})",
+                Message = $"A {this.parkingState.ParkingStartedAt?.ToString("yyyy-MM-dd HH:mm")} -kor indult parkolásod leállt",
+                Priority = Priority.Normal,
+                Timestamp = DateTimeOffset.Now.ToLocalTime().ToString(),
+            });
+        this.logger.LogInformation("Parking stopped for {VIN}", vin);
     }
 }
 
 public class MessageProcessorConfiguration
 {
-    
+    public string PushoverAPIKey { get; set; } = "a255e6nkpguw1i96iyj3z9faacgjp7";
+    public Dictionary<string, string> VinNotifications { get; set; } = new Dictionary<string, string>() { { "5YJ3E7EB7KF291652", "u2ouaqqu5gd9f1bq3rmrtwriumaffu"} /*Zoli*/ };
+}
+
+file static class DateTimeOffsetExtensions
+{
+    public static string ToElapsed(this TimeSpan ts)
+    {
+        var parts = new List<string>();
+
+        if (ts.Days > 0)
+            parts.Add($"{ts.Days} nap");
+        if (ts.Hours > 0)
+            parts.Add($"{ts.Hours} óra");
+        if (ts.Minutes > 0)
+            parts.Add($"{ts.Minutes} perc");
+
+        return string.Join(", ", parts);
+    }
 }

Source/ProofOfConcept/Services/ZoneDeterminatorService.cs

@@ -0,0 +1,63 @@
+using Microsoft.Extensions.Options;
+using NetTopologySuite.Features;
+using NetTopologySuite.Geometries;
+using NetTopologySuite.IO;
+using SzakatsA.Result;
+
+namespace ProofOfConcept.Services;
+
+public class ZoneDeterminatorService
+{
+    private readonly ILogger<ZoneDeterminatorService> logger;
+    private ZoneDeterminatorServiceConfiguration configuration;
+
+    private FeatureCollection parkingZones;
+    private bool initialized;
+    
+    public ZoneDeterminatorService(ILogger<ZoneDeterminatorService> logger, IOptions<ZoneDeterminatorServiceConfiguration> options)
+    {
+        this.logger = logger;
+        this.configuration = options.Value;
+        
+        this.parkingZones = new FeatureCollection();
+        this.initialized = false;
+    }
+    
+    public async Task<Result<string>> DetermineZoneCodeAsync(double latitude, double longitude, CancellationToken cancellationToken = default(CancellationToken))
+    {
+        this.logger.LogTrace("Determinating parking zone code for coordinates: {Latitude}, {Longitude}...", latitude, longitude);
+
+        if (!this.initialized)
+            await InitializeAsync(cancellationToken);
+        
+        Point point = new Point(longitude, latitude);
+        IFeature? zone = this.parkingZones.FirstOrDefault(f => f.Geometry.Contains(point));
+
+        if (zone is null)
+            return Result.Success(String.Empty);
+        else if (!zone.Attributes.Exists("zoneid"))
+            return Result.Fail(new MissingFieldException("Zone ID not found for parking zone"));
+        else if (zone.Attributes["zoneid"] is null)
+            return Result.Fail(new NullReferenceException("Zone ID null for parking zone"));
+        else if (zone.Attributes["zoneid"].ToString() is null)
+            return Result.Fail(new InvalidCastException($"Zone ID is of type {zone.Attributes["zoneID"].GetType().FullName}"));
+        else
+            return Result.Success(zone.Attributes["zoneid"].ToString()!);
+    }
+
+    private async Task InitializeAsync(CancellationToken cancellationToken = default(CancellationToken))
+    {
+        this.logger.LogTrace("Initializing...");
+        
+        string geojson = await File.ReadAllTextAsync(this.configuration.ZoneFilePath, cancellationToken);
+        GeoJsonReader reader = new GeoJsonReader();
+        this.parkingZones = reader.Read<FeatureCollection>(geojson);
+
+        this.logger.LogInformation("Initialized");
+    }
+}
+
+public class ZoneDeterminatorServiceConfiguration
+{
+    public string ZoneFilePath { get; set; } = "Resources/zones.geojson";
+}