Split Electricity API days endpoint

src/Electricity.Api/Controllers/ElectricityLogController.cs

@@ -23,23 +23,38 @@ public class ElectricityLogController : ControllerBase
 
     [HttpGet()]
     [Route("/day")]
+    public async Task<ActionResult<Minute[]>> Get([FromQuery] string? date)
+    {
+        if (string.IsNullOrWhiteSpace(date) || !DateOnly.TryParseExact(date, Constants.isoDateFormat, out _))
+        {
+            return BadDateParameter(nameof(date));
+        }
+
+        return await electricityService.GetDetailsFor(date);
+    }
+
+    [HttpGet()]
+    [Route("/days")]
     public async Task<ActionResult<Day[]>> Get([FromQuery] string? start, [FromQuery] string? stop)
     {
         if (string.IsNullOrWhiteSpace(start) || !DateOnly.TryParseExact(start, Constants.isoDateFormat, out _))
         {
-            return BadRequest();
+            return BadDateParameter(nameof(start));
         }
 
-        if (string.IsNullOrWhiteSpace(stop))
+        if (string.IsNullOrWhiteSpace(stop) || !DateOnly.TryParseExact(stop, Constants.isoDateFormat, out _))
         {
-            return await electricityService.GetDetailsFor(start);
+            return BadDateParameter(nameof(stop));
         }
 
-        if (!DateOnly.TryParseExact(stop, Constants.isoDateFormat, out _) || string.Compare(start, stop) > 0)
+        if (string.Compare(start, stop) > 0)
         {
-            return BadRequest();
+            return BadRequest($"The date argument of {nameof(stop)} must be greater or equal to the argument value of {nameof(start)}");
         }
 
         return await electricityService.GetSummariesFor(start, stop);
     }
+
+    private BadRequestObjectResult BadDateParameter(string parameterName) =>
+        BadRequest($"The search parameter {parameterName} is missing or is not a valid ISO date ({Constants.isoDateFormat}).");
 }