/**
* Finds changes in external sources compared to wiki state.
*
* The returned array is as following:
* - First level is indexed by language code
* - Second level is indexed by change type:
* - - addition (new message in the file)
* - - deletion (message in wiki not present in the file)
* - - change (difference in content)
* - Third level is a list of changes
* - Fourth level is change properties
* - - key (the message key)
* - - content (the message content in external source, null for deletions)
*
* @param FileBasedMessageGroup $group
* @param array|string $languages
* @throws MWException
* @return array array[language code][change type] = change.
*/
public function processGroup(FileBasedMessageGroup $group, $languages)
{
$this->changes = array();
if ($languages === self::ALL_LANGUAGES) {
$languages = $group->getTranslatableLanguages();
// This means all languages
if ($languages === null) {
$languages = TranslateUtils::getLanguageNames('en');
}
$languages = array_keys($languages);
} elseif (!is_array($languages)) {
throw new MWException('Invalid input given for $languages');
}
// Process the source language before others
$sourceLanguage = $group->getSourceLanguage();
$index = array_search($sourceLanguage, $languages);
if ($index !== false) {
unset($languages[$index]);
$this->processLanguage($group, $sourceLanguage);
}
foreach ($languages as $code) {
$this->processLanguage($group, $code);
}
return $this->changes;
}
