Added get methods to API.

2024-01-09 18:21:31 -07:00
parent b73c2e979f
commit 3c67d37e12
10 changed files with 339 additions and 267 deletions
--- a/Helper/GasHelper.cs
+++ b/Helper/GasHelper.cs
@@ -0,0 +1,82 @@
+using CarCareTracker.Models;
+
+namespace CarCareTracker.Helper
+{
+    public interface IGasHelper
+    {
+        List<GasRecordViewModel> GetGasRecordViewModels(List<GasRecord> result, bool useMPG, bool useUKMPG);
+    }
+    public class GasHelper : IGasHelper
+    {
+        public List<GasRecordViewModel> GetGasRecordViewModels(List<GasRecord> result, bool useMPG, bool useUKMPG)
+        {
+            var computedResults = new List<GasRecordViewModel>();
+            int previousMileage = 0;
+            decimal unFactoredConsumption = 0.00M;
+            int unFactoredMileage = 0;
+            //perform computation.
+            for (int i = 0; i < result.Count; i++)
+            {
+                var currentObject = result[i];
+                decimal convertedConsumption;
+                if (useUKMPG && useMPG)
+                {
+                    //if we're using UK MPG and the user wants imperial calculation insteace of l/100km
+                    //if UK MPG is selected then the gas consumption are stored in liters but need to convert into UK gallons for computation.
+                    convertedConsumption = currentObject.Gallons / 4.546M;
+                }
+                else
+                {
+                    convertedConsumption = currentObject.Gallons;
+                }
+                if (i > 0)
+                {
+                    var deltaMileage = currentObject.Mileage - previousMileage;
+                    var gasRecordViewModel = new GasRecordViewModel()
+                    {
+                        Id = currentObject.Id,
+                        VehicleId = currentObject.VehicleId,
+                        Date = currentObject.Date.ToShortDateString(),
+                        Mileage = currentObject.Mileage,
+                        Gallons = convertedConsumption,
+                        Cost = currentObject.Cost,
+                        DeltaMileage = deltaMileage,
+                        CostPerGallon = currentObject.Cost / convertedConsumption
+                    };
+                    if (currentObject.IsFillToFull)
+                    {
+                        //if user filled to full.
+                        gasRecordViewModel.MilesPerGallon = useMPG ? (unFactoredMileage + deltaMileage) / (unFactoredConsumption + convertedConsumption) : 100 / ((unFactoredMileage + deltaMileage) / (unFactoredConsumption + convertedConsumption));
+                        //reset unFactored vars
+                        unFactoredConsumption = 0;
+                        unFactoredMileage = 0;
+                    }
+                    else
+                    {
+                        unFactoredConsumption += convertedConsumption;
+                        unFactoredMileage += deltaMileage;
+                        gasRecordViewModel.MilesPerGallon = 0;
+                    }
+                    computedResults.Add(gasRecordViewModel);
+                }
+                else
+                {
+                    computedResults.Add(new GasRecordViewModel()
+                    {
+                        Id = currentObject.Id,
+                        VehicleId = currentObject.VehicleId,
+                        Date = currentObject.Date.ToShortDateString(),
+                        Mileage = currentObject.Mileage,
+                        Gallons = convertedConsumption,
+                        Cost = currentObject.Cost,
+                        DeltaMileage = 0,
+                        MilesPerGallon = 0,
+                        CostPerGallon = currentObject.Cost / convertedConsumption
+                    });
+                }
+                previousMileage = currentObject.Mileage;
+            }
+            return computedResults;
+        }
+    }
+}