public static List <EvalParam> FromJson(string json)
{
if (String.IsNullOrWhiteSpace(json))
{
return(null);
}
var pa = new List <EvalParam>();
var arr = JsonConvert.DeserializeObject(json);
if (arr is JArray)
{
foreach (JObject jo in (JArray)arr)
{
var p = new EvalParam();
p.Name = jo["Name"] == null ? "": jo["Name"].ToString();
p.Value = jo["Value"] == null? null: EvalParamValue.FromExp(jo["Value"].ToString());
pa.Add(p);
}
}
return(pa);
}
public static EvalParamValue FromExp(string exp)
{
var param = new EvalParamValue()
{
Source = EvalSourceType.Constant, Value = exp
};
if (string.IsNullOrEmpty(exp) || !exp.Trim().StartsWith("@"))
{
return(param);
}
var field = exp.Replace("@", "").Trim().ToLower();
if (exp.Trim().StartsWith("@$"))
{
param.Source = EvalSourceType.Env;
if (field.StartsWith("$qs."))
{
param.Source = EvalSourceType.RequestQuery;
}
else if (field.StartsWith("$user."))
{
param.Source = EvalSourceType.User;
}
else if (field.StartsWith("$app."))
{
param.Source = EvalSourceType.Env;
}
else if (field.StartsWith("$params."))
{
param.Source = EvalSourceType.Parameters;
}
field = field.Split('.')[1];
}
else
{
param.Source = EvalSourceType.ModelField;
}
param.Value = field;
return(param);
}
