API updates for functional code

house-plant-api/Services/CachedBluetoothService.cs

@@ -0,0 +1,101 @@
+namespace house_plant_api.Services
+{
+    using house_plant_api.Context;
+    using house_plant_api.Models;
+    using Microsoft.EntityFrameworkCore;
+    using System;
+    using System.Linq;
+    using System.Threading.Tasks;
+
+    public class CachedBluetoothService
+    {
+        private readonly BluetoothService _bluetoothService;
+        private readonly IDbContextFactory<AppDbContext> _dbContextFactory;
+
+        public CachedBluetoothService(
+            BluetoothService bluetoothService,
+            IDbContextFactory<AppDbContext> dbContextFactory)
+        {
+            _bluetoothService = bluetoothService;
+            _dbContextFactory = dbContextFactory;
+        }
+
+        public List<Device> GetTrackedDevices()
+        {
+            // If you're using an IDbContextFactory:
+            using var dbContext = _dbContextFactory.CreateDbContext();
+            // Or if you're injecting a scoped dbContext (see note below):
+            // var dbContext = _dbContext;
+
+            return dbContext.Devices.ToList();
+        }
+
+        public async Task<List<Device>> GetTrackedDevicesAsync()
+        {
+            using var dbContext = _dbContextFactory.CreateDbContext();
+            return await dbContext.Devices.ToListAsync();
+        }
+
+        public async Task PollDevicesAsync()
+        {
+            try
+            {
+                var devices = await _bluetoothService.ScanDevicesAsync();
+
+                // Create a fresh AppDbContext instance
+                using var dbContext = _dbContextFactory.CreateDbContext();
+
+                foreach (var device in devices)
+                {
+                    var existingDevice = dbContext.Devices
+                        .FirstOrDefault(d => d.Uuid == device.Id.ToString());
+
+                    if (existingDevice == null)
+                    {
+                        dbContext.Devices.Add(new Device
+                        {
+                            Name = device.Name,
+                            Nickname = "Pakkun Flower",
+                            Uuid = device.Id.ToString(),
+                            LastSeen = DateTime.Now
+                        });
+                    }
+                    else
+                    {
+                        existingDevice.LastSeen = DateTime.Now;
+
+                        try
+                        {
+                            var moisture = await _bluetoothService.GetSoilMoistureAsync(device.Name);
+                            existingDevice.Moisture = moisture;
+                        }
+                        catch
+                        {
+                            // Swallow exceptions from reading moisture
+                        }
+                    }
+                }
+
+                await dbContext.SaveChangesAsync();
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"Error during polling: {ex.Message}");
+            }
+        }
+
+        public async Task<bool> DeleteDeviceAsync(string name)
+        {
+            using var dbContext = _dbContextFactory.CreateDbContext();
+            var device = dbContext.Devices.FirstOrDefault(d => d.Name == name);
+
+            if (device == null)
+                return false;
+
+            dbContext.Devices.Remove(device);
+            await dbContext.SaveChangesAsync();
+            return true;
+        }
+
+    }
+}