private SearchExpression ParseExpression(SearchContext context, SearchProvider expressionProvider)
{
try
{
return(SearchExpression.Parse(context));
}
catch (SearchExpressionParseException ex)
{
var queryError = new SearchQueryError(ex.index, ex.length, ex.Message,
context, expressionProvider, fromSearchQuery: true, SearchQueryErrorType.Error);
context.AddSearchQueryError(queryError);
return(null);
}
}
public static bool TryParse(StringView text, out QueryMarker marker)
{
marker = none;
if (!IsQueryMarker(text))
{
return(false);
}
var innerText = text.Substring(k_StartToken.Length, text.Length - k_StartToken.Length - k_EndToken.Length);
var indexOfColon = innerText.IndexOf(':');
if (indexOfColon < 0)
{
return(false);
}
var controlType = innerText.Substring(0, indexOfColon).Trim().ToString();
var args = new List <StringView>();
var level = 0;
var currentArgStart = indexOfColon + 1;
for (var i = currentArgStart; i < innerText.Length; ++i)
{
if (ParserUtils.IsOpener(innerText[i]))
{
++level;
}
if (ParserUtils.IsCloser(innerText[i]))
{
--level;
}
if (innerText[i] != ',' || level != 0)
{
continue;
}
if (i + 1 == innerText.Length)
{
return(false);
}
args.Add(innerText.Substring(currentArgStart, i - currentArgStart).Trim());
currentArgStart = i + 1;
}
if (currentArgStart == innerText.Length)
{
return(false); // No arguments
}
// Extract the final argument, since there is no comma after the last argument
args.Add(innerText.Substring(currentArgStart, innerText.Length - currentArgStart).Trim());
var queryMarkerArguments = new List <QueryMarkerArgument>();
using (var context = SearchService.CreateContext(""))
{
foreach (var arg in args)
{
var parserArgs = new SearchExpressionParserArgs(arg, context, SearchExpressionParserFlags.ImplicitLiterals);
SearchExpression expression = null;
try
{
expression = SearchExpression.Parse(parserArgs);
}
catch (SearchExpressionParseException)
{ }
if (expression == null || !expression.types.HasAny(SearchExpressionType.Literal))
{
queryMarkerArguments.Add(new QueryMarkerArgument {
rawText = arg, expression = expression, value = expression == null ? arg.ToString() : null
});
continue;
}
var results = expression.Execute(context);
var resolvedValue = results.FirstOrDefault(item => item != null);
var resolvedValueObject = resolvedValue?.value;
queryMarkerArguments.Add(new QueryMarkerArgument {
rawText = arg, expression = expression, value = resolvedValueObject
});
}
}
marker = new QueryMarker {
type = controlType, text = text, args = queryMarkerArguments.ToArray()
};
return(true);
}