private void ProcessObjectElement(JsonElement element, string elementName, TraversalArgs args)
{
HashSet <string> childKeys = new();
int childrenCount = element.EnumerateObject().Count();
foreach (TraversalRule rule in args.Rules)
{
int childIndex = 0;
childKeys.Clear();
foreach (JsonProperty child in element.EnumerateObject())
{
string childElementName = child.Name;
string childKey = (rule.KeyCreator ?? _defaultObjectKeyExtractor).CreateKey(child.Value, childElementName, elementName, childIndex, childrenCount);
if (!childKeys.Add(childKey))
{
// Child key was already used before. Keys should be unique.
throw new LocalizationKeyIsNotUniqueException(childKey, args.IdentifierPrefix);
}
TraversalArgs nextArgs = args;
nextArgs.Rules = rule.ChildRules;
using IDisposable? loggerScope = _logger.BeginScope(childElementName);
TraverseJsonElements(child.Value, childElementName, childKey, nextArgs);
childIndex++;
}
}
}
private void TraverseJsonElements(
JsonElement element,
string elementName,
string localizationKey,
TraversalArgs args)
{
using IDisposable? loggerScope = _logger.BeginScope(elementName);
List <TraversalRule> complyingRules = args.Rules.Where(r => r.AllowsTraversalOfIdentifier(elementName)).ToList();
if (complyingRules.Count == 0)
{
// This identifier was filtered out.
_logger.LogDebug(LocalizableStrings.stringExtractor_log_jsonElementExcluded, args.IdentifierPrefix + _keySeparator + elementName);
return;
}
JsonValueKind valueKind = element.ValueKind;
if (valueKind == JsonValueKind.String)
{
ProcessStringElement(element, elementName, localizationKey, args);
return;
}
string newIdentifierPrefix = args.IdentifierPrefix + _keySeparator + elementName;
if (valueKind == JsonValueKind.Array)
{
TraversalArgs newData = args;
newData.IdentifierPrefix = newIdentifierPrefix;
newData.Rules = complyingRules;
ProcessArrayElement(element, elementName, newData);
return;
}
if (valueKind == JsonValueKind.Object)
{
TraversalArgs newData = args;
newData.IdentifierPrefix = newIdentifierPrefix;
newData.Rules = complyingRules;
newData.KeyPrefix = args.KeyPrefix + _keySeparator + localizationKey;
ProcessObjectElement(element, elementName, newData);
}
}
private void ProcessObjectElement(JsonElement element, string elementName, TraversalArgs args)
{
foreach (TraversalRule rule in args.Rules)
{
int childIndex = 0;
foreach (JsonProperty child in element.EnumerateObject())
{
string childElementName = child.Name;
string childKey = (rule.KeyCreator ?? _defaultObjectKeyExtractor).CreateKey(child.Value, childElementName, elementName, childIndex);
TraversalArgs nextArgs = args;
nextArgs.Rules = rule.ChildRules;
using IDisposable? loggerScope = _logger.BeginScope(childElementName);
TraverseJsonElements(child.Value, childElementName, childKey, nextArgs);
childIndex++;
}
}
}
private void ProcessArrayElement(JsonElement element, string elementName, TraversalArgs args)
{
foreach (TraversalRule rule in args.Rules)
{
int childIndex = 0;
foreach (var child in element.EnumerateArray())
{
string childElementName = childIndex.ToString();
string?childKey = (rule.KeyCreator ?? _defaultArrayKeyExtractor).CreateKey(child, childElementName, elementName, childIndex);
TraversalArgs nextArgs = args;
nextArgs.Rules = rule.ChildRules;
using IDisposable? loggerScope = _logger.BeginScope(childElementName);
TraverseJsonElements(child, childElementName, childKey, nextArgs);
childIndex++;
}
}
}
private void ProcessStringElement(JsonElement element, string elementName, string key, TraversalArgs data)
{
string identifier = (data.IdentifierPrefix + _keySeparator + elementName).ToLowerInvariant();
if (data.ExtractedStringIds.Contains(identifier))
{
// This string was already included by an earlier rule, possibly with a different key. Skip.
_logger.LogDebug(LocalizableStrings.stringExtractor_log_skippingAlreadyAddedElement, identifier);
return;
}
string finalKey = data.KeyPrefix == null ? key : (data.KeyPrefix + _keySeparator + key);
if (finalKey.StartsWith(_keySeparator + string.Empty + _keySeparator))
{
// Omit the dots generated by the root element and the initial empty prefix.
finalKey = finalKey.Substring(2);
}
data.ExtractedStringIds.Add(identifier);
data.ExtractedStrings.Add(new TemplateString(identifier, finalKey, element.GetString() ?? string.Empty));
_logger.LogTrace(LocalizableStrings.stringExtractor_log_jsonElementAdded, identifier);
}