private (MethodInfo, Expression[]) GetApiMethodAndParameters(
string methodName,
HttpMethod httpMethod,
IEnumerable <string> argsNames,
Expression[] argsValues)
{
// Setup query string for simple args and body for one complex arg.
var queryDict = new Dictionary <string, string>();
string bodyString = null;
for (int i = 0; i < argsNames.Count(); i++)
{
var constValue = ReduceToConstant(argsValues[i]);
var typeOfValue = constValue.GetType();
var stringValue = objectConverter.ConvertToString(constValue);
if (TypeHelpers.IsSimpleType(typeOfValue))
{
queryDict.Add(argsNames.ElementAt(i), stringValue);
}
else if (string.IsNullOrEmpty(bodyString))
{
bodyString = stringValue;
}
else
{
throw new ArgumentException("Only one argument can be complex type.");
}
}
// Create url with query args.
var url = methodName + queryDict.Aggregate("?", (s, kvp) => $"{s}{kvp.Key}={kvp.Value}&");
// Construct HttpRequestMessage.
var httpRequestMessageConstructor = typeof(HttpRequestMessage)
.GetConstructor(new[] { typeof(HttpMethod), typeof(string) });
var httpRequestMessageCtorExpression = Expression.New(
httpRequestMessageConstructor,
Expression.Constant(httpMethod),
Expression.Constant(url));
// Add prop initializer with Content initialize if needs.
Expression httpRequestMessage = httpRequestMessageCtorExpression;
if (httpMethod != HttpMethod.Get && httpMethod != HttpMethod.Head && bodyString != null)
{
httpRequestMessage = SetupContentPropertyInitializer(
httpRequestMessageCtorExpression,
GetBodyContentExpression(bodyString));
}
var parameters = new[] { httpRequestMessage };
var apiMethod = typeof(HttpClient).GetMethod(SendAsyncMethodName, new[] { typeof(HttpRequestMessage) });
return(apiMethod, parameters);
}
