first commit

src/GreenHome.Api/Controllers/TelemetryController.cs

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+using Microsoft.AspNetCore.Mvc;
+using GreenHome.Application;
+
+namespace GreenHome.Api.Controllers;
+
+[ApiController]
+[Route("api/[controller]")]
+public class TelemetryController : ControllerBase
+{
+    private readonly ITelemetryService telemetryService;
+
+    public TelemetryController(ITelemetryService telemetryService)
+    {
+        this.telemetryService = telemetryService;
+    }
+
+    [HttpGet]
+    public async Task<ActionResult<PagedResult<TelemetryDto>>> List([FromQuery] int? deviceId, [FromQuery] DateTime? startUtc, [FromQuery] DateTime? endUtc, [FromQuery] int page = 1, [FromQuery] int pageSize = 20, CancellationToken cancellationToken = default)
+    {
+        var filter = new TelemetryFilter { DeviceId = deviceId, StartDateUtc = startUtc, EndDateUtc = endUtc, Page = page, PageSize = pageSize };
+        var result = await telemetryService.ListAsync(filter, cancellationToken);
+        return Ok(result);
+    }
+
+    [HttpGet("AddData")]
+    public async Task<ActionResult<int>> Create(string deviceName, decimal temperatureC, decimal humidityPercent, 
+        decimal soilPercent, int gasPPM, decimal lux, CancellationToken cancellationToken)
+    {
+        TelemetryDto dto = new TelemetryDto
+        {
+            DeviceName = deviceName,
+            TemperatureC = temperatureC,
+            HumidityPercent = humidityPercent,
+            SoilPercent = soilPercent,
+            GasPPM = gasPPM,
+            Lux = lux,
+            TimestampUtc = DateTime.UtcNow
+        };
+        var id = await telemetryService.AddAsync(dto, cancellationToken);
+        return Ok(id);
+    }
+
+    [HttpGet("minmax")]
+    public async Task<ActionResult<TelemetryMinMax>> MinMax([FromQuery] int deviceId, [FromQuery] DateTime? startUtc, [FromQuery] DateTime? endUtc, CancellationToken cancellationToken)
+    {
+        var result = await telemetryService.GetMinMaxAsync(deviceId, startUtc, endUtc, cancellationToken);
+        return Ok(result);
+    }
+
+    [HttpGet("days")]
+    public async Task<ActionResult<IReadOnlyList<DayCount>>> Days([FromQuery] int deviceId, [FromQuery] int year, [FromQuery] int month, CancellationToken cancellationToken)
+    {
+        var result = await telemetryService.GetMonthDaysAsync(deviceId, year, month, cancellationToken);
+        return Ok(result);
+    }
+
+    [HttpGet("months")]
+    public async Task<ActionResult<IReadOnlyList<int>>> Months([FromQuery] int deviceId, [FromQuery] int year, CancellationToken cancellationToken)
+    {
+        var result = await telemetryService.GetActiveMonthsAsync(deviceId, year, cancellationToken);
+        return Ok(result);
+    }
+}