/// <summary>Updates the game's localization database from the strings on the disk.</summary>
/// <param name="configFilename">The file name with the localization data.</param>
/// <param name="targetNode">
/// The language node from database to update. It must not be a copy!
/// </param>
public static void UpdateLocalizationContent(string configFilename, ConfigNode targetNode)
{
var newNode = ConfigAccessor.GetNodeByPath(
ConfigNode.Load(configFilename), "Localization/" + Localizer.CurrentLanguage);
var oldTags = new HashSet <string>(targetNode.values.DistinctNames());
var newTags = new HashSet <string>(newNode.values.DistinctNames());
Debug.LogWarningFormat(
"Update localization config: added={0}, deleted={1}, updated={2}, file={3}",
newTags.Except(oldTags).Count(),
oldTags.Except(newTags).Count(),
newTags.Intersect(oldTags).Count(),
configFilename);
// Update the existing and new tags.
newNode.values.Cast <ConfigNode.Value>().ToList()
.ForEach(value => Localizer.Tags[value.name] = Regex.Unescape(value.value));
// Drop the deleted tags.
oldTags.Except(newTags).ToList()
.ForEach(tag => Localizer.Tags.Remove(tag));
// Update the database config.
targetNode.values.Clear();
newNode.values.Cast <ConfigNode.Value>().ToList()
.ForEach(targetNode.values.Add);
}