private static IEnumerable <JToken> GetItemsByMark(QueryFilterModel model,
ImmutableList <JToken> orderedTokens, int ii)
{
var res = model.ComparisonMark switch
{
">=" => orderedTokens.GetRange(ii, orderedTokens.Count - ii),
"<=" => orderedTokens.GetRange(ii, orderedTokens.Count - ii),
">" => orderedTokens.GetRange(ii + 1, orderedTokens.Count - ii - 1),
"<" => orderedTokens.GetRange(ii + 1, orderedTokens.Count - ii - 1),
_ => Enumerable.Empty <JToken>()
};
return(new JObject(res).ToObject <JToken>());
}
}
private JToken GetToken(JToken source, QueryFilterModel model)
{
if (model.ComparisonMark.Equals("=="))
{
return(source.Children()
.FirstOrDefault(x => x.Path.EndsWith(model.Value, true, null)));
}
var orderedTokens = model.ComparisonMark.Contains("<")
? source.OrderByDescending(x => x.Path).ToImmutableList()
: source.OrderBy(x => x.Path).ToImmutableList();
var tokenIndex = GetTokenIndex(model, orderedTokens);
var result = GetItemsByMark(model, orderedTokens, tokenIndex);
return(JToken.FromObject(result));
}
private static string BuildEqualsFilter(QueryFilterModel model) =>
$@"[?(@.{model.PropertyName.ToLower()} {model.ComparisonMark} {model.Value})]";
private static int GetTokenIndex(QueryFilterModel model, ImmutableList <JToken> orderedTokens)
{
var item = orderedTokens.FirstOrDefault(x => x.Path.EndsWith(model.Value, true, null));
return(orderedTokens.IndexOf(item));
}
