Record last time an environmental device reported

Environment/Service/Controllers/DeviceController.cs

@@ -0,0 +1,45 @@
+using ChrisKaczor.HomeMonitor.Environment.Service.Data;
+using ChrisKaczor.HomeMonitor.Environment.Service.Models.Device;
+using Microsoft.AspNetCore.Mvc;
+
+namespace ChrisKaczor.HomeMonitor.Environment.Service.Controllers;
+
+[Route("[controller]")]
+[ApiController]
+public class DeviceController(Database database, IConfiguration configuration) : ControllerBase
+{
+    [HttpGet()]
+    public async Task<ActionResult<List<Device>>> GetDevices()
+    {
+        return (await database.GetDevicesAsync()).ToList();
+    }
+
+    [HttpGet("{name}")]
+    public async Task<ActionResult<Device>> GetDevice(string name)
+    {
+        var device = await database.GetDeviceAsync(name);
+
+        if (device == null)
+            return NotFound();
+
+        return device;
+    }
+
+    [HttpPost()]
+    public async Task<ActionResult> AddDevice(Device device)
+    {
+        HttpContext.Request.Headers.TryGetValue("Authorization", out var authorizationHeader); 
+
+        if (authorizationHeader != "Bearer " + configuration["AuthorizationToken"])
+            return Unauthorized();
+
+        var existingDevice = await database.GetDeviceAsync(device.Name);
+
+        if (existingDevice != null)
+            return BadRequest("Device already exists");
+
+        await database.SetDeviceLastUpdatedAsync(device.Name, device.LastUpdated);
+
+        return Ok();
+    }
+}