public static ValueProviderBase?TryParse(string typeToken, string variable, ITemplateParser tp)
{
var type = typeToken.TryBefore(":") ?? "";
var token = typeToken.TryAfter(":") ?? typeToken;
switch (type)
{
case "":
{
if (token.StartsWith("$"))
{
string v = token.TryBefore('.') ?? token;
if (!tp.Variables.TryGetValue(v, out ValueProviderBase? vp))
{
tp.AddError(false, "Variable '{0}' is not defined at this scope".FormatWith(v));
return(null);
}
if (!(vp is TokenValueProvider))
{
return(new ContinueValueProvider(token.TryAfter('.'), vp, tp.AddError));
}
}
ParsedToken result = ParsedToken.TryParseToken(token, SubTokensOptions.CanElement, tp.QueryDescription, tp.Variables, tp.AddError);
if (result.QueryToken != null && TranslateInstanceValueProvider.IsTranslateInstanceCanditate(result.QueryToken))
{
return new TranslateInstanceValueProvider(result, false, tp.AddError)
{
Variable = variable
}
}
;
else
{
return new TokenValueProvider(result, false)
{
Variable = variable
}
};
}
case "q":
{
ParsedToken result = ParsedToken.TryParseToken(token, SubTokensOptions.CanElement, tp.QueryDescription, tp.Variables, tp.AddError);
return(new TokenValueProvider(result, true)
{
Variable = variable
});
}
case "t":
{
ParsedToken result = ParsedToken.TryParseToken(token, SubTokensOptions.CanElement, tp.QueryDescription, tp.Variables, tp.AddError);
return(new TranslateInstanceValueProvider(result, true, tp.AddError)
{
Variable = variable
});
}
case "m":
return(new ModelValueProvider(token, tp.ModelType, tp.AddError)
{
Variable = variable
});
case "g":
return(new GlobalValueProvider(token, tp.AddError)
{
Variable = variable
});
case "d":
return(new DateValueProvider(token, tp.AddError)
{
Variable = variable
});
default:
tp.AddError(false, "{0} is not a recognized value provider (q:Query, t:Translate, m:Model, g:Global or just blank)");
return(null);
}
}