public string?TryLookupResourceName(string?typeString, LanguageExpression nameExpression)
{
if (typeString is null)
{
var nameString = ExpressionsEngine.SerializeExpression(nameExpression);
var resourceKeySuffix = EscapeIdentifier($"_{nameString}");
var matchingResources = assignedResourceNames.Where(kvp => kvp.Key.EndsWith(resourceKeySuffix, StringComparison.OrdinalIgnoreCase));
if (matchingResources.Count() == 1)
{
// only return a value if we're sure about the match
return(matchingResources.First().Value);
}
return(null);
}
// it's valid to include a trailing slash, so we need to normalize it
typeString = typeString.TrimEnd('/');
var assignedResourceKey = GetResourceNameKey(typeString, nameExpression);
if (!assignedResourceNames.TryGetValue(assignedResourceKey, out var name))
{
return(null);
}
return(name);
}
public static LanguageExpression ParseExpression(string value)
{
if (ExpressionsEngine.IsLanguageExpression(value))
{
return(ExpressionsEngine.ParseLanguageExpression(value));
}
return(new JTokenExpression(value));
}
public static IEnumerable <JObject> FlattenAndNormalizeResource(JToken resourceJtoken)
{
var resource = resourceJtoken as JObject ?? throw new ConversionFailedException($"Unable to read resource", resourceJtoken);
var(parentType, parentName, _) = ParseResource(resource);
var childResources = GetProperty(resource, "resources");
if (childResources != null)
{
childResources.Remove();
}
yield return(resource);
var childResourcesArray = childResources?.Value as JArray;
if (childResourcesArray is null)
{
yield break;
}
foreach (var childResource in childResourcesArray)
{
var childResourceObject = childResource as JObject ?? throw new ConversionFailedException($"Unable to read child resource", childResource);
var(childType, childName, _) = ParseResource(childResourceObject);
if (GetProperty(resource, "copy") is { } copyProperty)
{
childResourceObject["copy"] = copyProperty.Value;
}
if (GetProperty(resource, "condition") is { } conditionProperty)
{
childResourceObject["condition"] = conditionProperty.Value;
}
// child may sometimes be specified using the fully-qualified type and name
if (!StringComparer.OrdinalIgnoreCase.Equals(parentType.Split("/")[0], childType.Split("/")[0]))
{
childResourceObject["type"] = $"{parentType}/{childType}";
childResourceObject["name"] = ExpressionsEngine.SerializeExpression(ExpressionHelpers.Concat(ExpressionHelpers.ParseExpression(parentName), new JTokenExpression("/"), ExpressionHelpers.ParseExpression(childName)));
}
foreach (var result in FlattenAndNormalizeResource(childResourceObject))
{
// recurse
yield return(result);
}
}
}
public static void VisitExpressions <TToken>(TToken input, Action <LanguageExpression> visitFunc)
where TToken : JToken
{
var visitor = new LanguageExpressionVisitor
{
OnFunctionExpression = visitFunc,
OnJTokenExpression = visitFunc,
};
void VisitLanguageExpressions(string value)
{
if (ExpressionsEngine.IsLanguageExpression(value))
{
var expression = ExpressionsEngine.ParseLanguageExpression(value);
expression.Accept(visitor);
}
}
if (input is JValue jValue && jValue.ToObject <string>() is { } value)
{
VisitLanguageExpressions(value);
return;
}
JsonUtility.WalkJsonRecursive(
input,
objectAction: @object =>
{
foreach (var property in @object.Properties())
{
VisitLanguageExpressions(property.Name);
}
},
tokenAction: token =>
{
if (token.Type == JTokenType.String && token.ToObject <string>() is { } value)
{
VisitLanguageExpressions(value);
}
});
private string GetResourceNameKey(string typeString, LanguageExpression nameExpression)
{
var nameString = ExpressionsEngine.SerializeExpression(nameExpression);
return(EscapeIdentifier($"{typeString}_{nameString}"));
}
public static LanguageExpression FlattenStringOperations(LanguageExpression original)
{
if (original is not FunctionExpression functionExpression)
{
return(original);
}
// convert a 'format' to a 'concat' function
if (functionExpression.NameEquals("format"))
{
var formatString = (functionExpression.Parameters[0] as JTokenExpression)?.Value.Value <string>() ?? throw new ArgumentException($"Unable to read format statement {ExpressionsEngine.SerializeExpression(functionExpression)} as string");
var formatHoleMatches = Regex.Matches(formatString, "{([0-9]+)}");
var concatExpressions = new List <LanguageExpression>();
var nextStart = 0;
for (var i = 0; i < formatHoleMatches.Count; i++)
{
var match = formatHoleMatches[i];
var position = match.Groups[1].Index;
var length = match.Groups[1].Length;
var intValue = int.Parse(match.Groups[1].Value);
// compensate for the {
if (nextStart < position - 1)
{
var betweenPortion = formatString.Substring(nextStart, position - 1 - nextStart);
concatExpressions.Add(new JTokenExpression(betweenPortion));
}
// replace it with the appropriately-numbered expression
concatExpressions.Add(functionExpression.Parameters[intValue + 1]);
// compensate for the }
nextStart = position + length + 1;
}
if (nextStart < formatString.Length)
{
var betweenPortion = formatString.Substring(nextStart, formatString.Length - nextStart);
concatExpressions.Add(new JTokenExpression(betweenPortion));
}
// overwrite the original expression
functionExpression = Concat(concatExpressions.ToArray());
}
// flatten nested 'concat' functions
if (functionExpression.NameEquals("concat"))
{
var concatExpressions = new List <LanguageExpression>();
foreach (var parameter in functionExpression.Parameters)
{
// recurse
var flattenedParameter = FlattenStringOperations(parameter);
if (flattenedParameter is FunctionExpression childFunction && childFunction.NameEquals("concat"))
{
// concat directly inside a concat - break it out
concatExpressions.AddRange(childFunction.Parameters);
continue;
}
concatExpressions.Add(flattenedParameter);
}
// overwrite the original expression
functionExpression = Concat(CombineConcatArguments(concatExpressions).ToArray());
}
// just return the inner portion if there's only one concat entry
if (functionExpression.NameEquals("concat") && functionExpression.Parameters.Length == 1)
{
return(functionExpression.Parameters[0]);
}
return(functionExpression);
}
