/**
* Read the header from the PO stream.
*
* The header is a special case PoItem, using the empty string as source and
* key-value pairs as translation. We just reuse the item reader logic to
* read the header.
*/
private function readHeader()
{
$item = $this->readItem();
// Handle the case properly when the .po file is empty (0 bytes).
if (!$item) {
return;
}
$header = new PoHeader();
$header->setFromString(trim($item->getTranslation()));
$this->_header = $header;
}
/**
* Implements PoMetadataInterface::setHeader().
*
* Sets the header and configure Drupal accordingly.
*
* Before being able to process the given header we need to know in what
* context this database write is done. For this the options must be set.
*
* A langcode is required to set the current header's PluralForm.
*
* @param PoHeader $header
* Header metadata.
*
* @throws Exception
*/
function setHeader(PoHeader $header)
{
$this->_header = $header;
$languages = language_list();
// Check for options.
$options = $this->getOptions();
if (empty($options)) {
throw new \Exception('Options should be set before assigning a PoHeader.');
}
$overwrite_options = $options['overwrite_options'];
// Check for langcode.
$langcode = $this->_langcode;
if (empty($langcode)) {
throw new \Exception('Langcode should be set before assigning a PoHeader.');
}
// Check is language is already created.
if (!isset($languages[$langcode])) {
throw new \Exception('Language should be known before using it.');
}
if (array_sum($overwrite_options) || empty($languages[$langcode]->plurals)) {
// Get and store the plural formula if available.
$plural = $header->getPluralForms();
if (isset($plural) && ($p = $header->parsePluralForms($plural))) {
list($nplurals, $formula) = $p;
db_update('languages')->fields(array('plurals' => $nplurals, 'formula' => $formula))->condition('language', $langcode)->execute();
}
}
}
