public override ExpressionResult Evaluate(MemberExpression left, string op, ConstantExpression right)
{
if (!op.Is(SearchOperator.Contains))
{
return(base.Evaluate(left, op, right));
}
var searchTerm = IngredientSearchTerm.Parse(right?.Value?.ToString());
var result = new ExpressionResult();
if (searchTerm == null)
{
return(result);
}
result.ServerSide = GenerateContainsExpression(left, searchTerm.Name);
if (searchTerm.Quantity == null || right == null)
{
return(result);
}
var genericType = left.Type.GetGenericArguments()[0];
result.ClientSide = Expression.Call(
typeof(IngredientExtensions),
nameof(IngredientExtensions.IsMatch),
new[] { genericType }, left, right);
return(result);
}
public static IngredientSearchTerm?Parse(string?criteria)
{
if (string.IsNullOrWhiteSpace(criteria))
{
return(null);
}
var result = new IngredientSearchTerm
{
Name = criteria
};
// First, check if the last but one token is any recognized search operator for this
var parts = criteria.Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
string?quantityAndUnits = null;
if (parts.Length > 2)
{
foreach (var op in ValidSearchOperators)
{
if (!parts[^ 2].Is(op))