Calculations in R6

src/Backend/DiunaBI.Core/Services/Calculations/BaseCalc.cs

@@ -40,6 +40,30 @@ public class BaseCalc
             Formula.All(c => char.IsDigit(c) || c == '[' || c == ']' || c == '+' || c == '-');
     }
 
+    public double Calculate(IReadOnlyDictionary<string, double> ingredients) 
+    {
+        if (ingredients == null)
+        {
+            throw new ArgumentNullException(nameof(ingredients));
+        }
+        
+        var codes = GetCodes();
+        var missing = codes.Where(x => !ingredients.ContainsKey(x)).ToList();
+        if (missing.Any())
+        {
+            throw new ArgumentException($"Missing ingredients: {string.Join(", ", missing)}");
+        }
+        
+        var formula = ingredients.Aggregate(Formula,
+            (current, ingredient) => current.Replace($"[{ingredient.Key}]", ingredient.Value.ToString(CultureInfo.InvariantCulture)));
+        if (formula.Contains('['))
+        {
+            throw new Exception($"Not all placeholders were replaced. Value{1} [{formula}]");
+        }
+        Entity expr = formula;
+        return (double)expr.EvalNumerical();
+    }
+
     public Record CalculateT3(List<Record> records)
     {
         var resultCode = ResultCode;
@@ -81,7 +105,6 @@ public class BaseCalc
             return result;
         }
     }
-
     public Record CalculateT1(List<Record> records)
     {
         var resultCode = ResultCode;
@@ -121,8 +144,7 @@ public class BaseCalc
             return result;
         }
     }
-
-    private List<string> GetCodes()
+    public List<string> GetCodes()
     {
         var codes = new List<string>();
         var endIndex = -1;
@@ -143,4 +165,9 @@ public class BaseCalc
 
         return codes;
     }
+
+    public string GetResultCode()
+    {
+        return ResultCode;
+    }
 }