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<?php
/**
* @file
* Definition of PoDatabaseReader.
*/
/**
* Gettext PO reader working with the locale module database.
*/
class PoDatabaseReader implements PoReaderInterface {
/**
* An associative array indicating which type of strings should be read.
*
* Elements of the array:
* - not_customized: boolean indicating if not customized strings should be
* read.
* - customized: boolean indicating if customized strings should be read.
* - no_translated: boolean indicating if non-translated should be read.
*
* The three options define three distinct sets of strings, which combined
* cover all strings.
*
* @var array
*/
private $_options;
/**
* Language code of the language being read from the database.
*
* @var string
*/
private $_langcode;
/**
* Store the result of the query so it can be iterated later.
*
* @var resource
*/
private $_result;
/**
* Database storage to retrieve the strings from.
*
* @var StringDatabaseStorage
*/
protected $storage;
/**
* Constructor, initializes with default options.
*/
function __construct() {
$this->setOptions(array());
$this->storage = new StringDatabaseStorage();
}
/**
* Implements PoMetadataInterface::getLangcode().
*/
public function getLangcode() {
return $this->_langcode;
}
/**
* Implements PoMetadataInterface::setLangcode().
*/
public function setLangcode($langcode) {
$this->_langcode = $langcode;
}
/**
* Get the options used by the reader.
*/
function getOptions() {
return $this->_options;
}
/**
* Set the options for the current reader.
*/
function setOptions(array $options) {
$options += array(
'customized' => FALSE,
'not_customized' => FALSE,
'not_translated' => FALSE,
);
$this->_options = $options;
}
/**
* Implements PoMetadataInterface::getHeader().
*/
function getHeader() {
return new PoHeader($this->getLangcode());
}
/**
* Implements PoMetadataInterface::setHeader().
*
* @throws Exception
* Always, because you cannot set the PO header of a reader.
*/
function setHeader(PoHeader $header) {
throw new \Exception('You cannot set the PO header in a reader.');
}
/**
* Builds and executes a database query based on options set earlier.
*/
private function loadStrings() {
$langcode = $this->_langcode;
$options = $this->_options;
$conditions = array();
if (array_sum($options) == 0) {
// If user asked to not include anything in the translation files,
// that would not make sense, so just fall back on providing a template.
$langcode = NULL;
// Force option to get both translated and untranslated strings.
$options['not_translated'] = TRUE;
}
// Build and execute query to collect source strings and translations.
if (!empty($langcode)) {
$conditions['language'] = $langcode;
// Translate some options into field conditions.
if ($options['customized']) {
if (!$options['not_customized']) {
// Filter for customized strings only.
$conditions['customized'] = L10N_UPDATE_CUSTOMIZED;
}
// Else no filtering needed in this case.
}
else {
if ($options['not_customized']) {
// Filter for non-customized strings only.
$conditions['customized'] = L10N_UPDATE_NOT_CUSTOMIZED;
}
else {
// Filter for strings without translation.
$conditions['translated'] = FALSE;
}
}
if (!$options['not_translated']) {
// Filter for string with translation.
$conditions['translated'] = TRUE;
}
return $this->storage->getTranslations($conditions);
}
else {
// If no language, we don't need any of the target fields.
return $this->storage->getStrings($conditions);
}
}
/**
* Get the database result resource for the given language and options.
*/
private function readString() {
if (!isset($this->_result)) {
$this->_result = $this->loadStrings();
}
return array_shift($this->_result);
}
/**
* Implements PoReaderInterface::readItem().
*/
function readItem() {
if ($string = $this->readString()) {
$values = (array)$string;
$poItem = new PoItem();
$poItem->setFromArray($values);
return $poItem;
}
}
}
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