luticate2-api/Luticate2.Auth/Utils/Business/ExpressionConverter/LuExpressionParamReplaceVis...

using System.Collections.Generic;
using System.Linq.Expressions;
using Luticate2.Auth.Utils.Dbo;
using Luticate2.Auth.Utils.Dbo.Result;
using Luticate2.Auth.Utils.Exceptions;

namespace Luticate2.Auth.Utils.Business.ExpressionConverter
{
    public interface ILuExpressionParamReplaceVisitorOptions
    {
        IDictionary<ParameterExpression, Expression> Parameters { get; }
    }

    public class LuExpressionParamReplaceVisitor : ExpressionVisitor
    {
        public ILuExpressionParamReplaceVisitorOptions Options { get; }

        public LuExpressionParamReplaceVisitor(ILuExpressionParamReplaceVisitorOptions options)
        {
            Options = options;
        }

        protected override Expression VisitParameter(ParameterExpression node)
        {
            if (!Options.Parameters.ContainsKey(node))
            {
                LuResult<Expression>.Error(LuStatus.InternalError.ToInt(),
                    $"Could not find a conversion for parameter {node}").Throw();
            }

            return Options.Parameters[node];
        }
    }
}