public void SubstituteOperationsWithResult(ref string calculationString, string symbol)
{
do
{
if (!calculationString.Contains(symbol))
{
break;
}
// Break if Negative Result, with no other calculations eg. -50
if (symbol == OperatorSymbol.Subtract && calculationString.Substring(0, 1) == symbol && !calculationString.Substring(1).Contains(symbol))
{
break;
}
// Break if Double Negative Result, with no other calculations eg. --50
if (symbol == OperatorSymbol.Subtract && calculationString.Substring(0, 2) == (symbol + symbol) && !calculationString.Substring(2).Contains(symbol))
{
calculationString = calculationString.Replace((symbol + symbol), "");
break;
}
string operationString = _operationIdentifier.GetNextOperationMatch(calculationString, symbol);
IOperator Operation = _operationFactory.Create(operationString);
decimal Result = Operation.GetResult();
calculationString = calculationString.Replace(operationString, Result.ToString());
}while (calculationString.Contains(symbol));
}
public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
var readerJObject = JObject.Load(reader);
if (readerJObject == null)
{
throw new JsonSerializationException("Cannot deserialize, not a valid operation Json.");
}
var type = readerJObject["type"].ToString();
if (!Enum.TryParse(type, true, out OperationType operationType))
{
throw new JsonSerializationException("Cannot deserialize, not a valid operation type " +
$"'{type}'.");
}
var @operator = _operatorFactory.Create(operationType);
var operation = @operator.CreateOperation();
serializer.Populate(readerJObject.CreateReader(), operation);
return(operation);
}
public async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = null)] HttpRequestMessage request)
{
var operation = await request.Content.ReadAsAsync <IOperation>(new[] { new JsonMediaTypeFormatter {
SerializerSettings = new JsonSerializerSettings {
Converters = new List <JsonConverter> {
new OperationConverter(_operatorFactory)
},
ContractResolver = new CamelCasePropertyNamesContractResolver(),
NullValueHandling = NullValueHandling.Ignore
}
} });
var @operator = _operatorFactory.Create(operation.Type);
if (@operator == null)
{
return(new BadRequestObjectResult("Invalid operation"));
}
var operationResult = @operator.Operate(operation);
return(new OkObjectResult(operationResult));
}