PoDatabaseReader.php

Same filename in other branches
  1. 9 core/modules/locale/src/PoDatabaseReader.php
  2. 8.9.x core/modules/locale/src/PoDatabaseReader.php
  3. 11.x core/modules/locale/src/PoDatabaseReader.php

Namespace

Drupal\locale

File

core/modules/locale/src/PoDatabaseReader.php

View source
<?php

namespace Drupal\locale;

use Drupal\Component\Gettext\PoHeader;
use Drupal\Component\Gettext\PoItem;
use Drupal\Component\Gettext\PoReaderInterface;

/**
 * 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;
    
    /**
     * Constructor, initializes with default options.
     */
    public function __construct() {
        $this->setOptions([]);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getLangcode() {
        return $this->langcode;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setLangcode($langcode) {
        $this->langcode = $langcode;
    }
    
    /**
     * Get the options used by the reader.
     */
    public function getOptions() {
        return $this->options;
    }
    
    /**
     * Set the options for the current reader.
     */
    public function setOptions(array $options) {
        $options += [
            'customized' => FALSE,
            'not_customized' => FALSE,
            'not_translated' => FALSE,
        ];
        $this->options = $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getHeader() {
        return new PoHeader($this->getLangcode());
    }
    
    /**
     * Implements Drupal\Component\Gettext\PoMetadataInterface::setHeader().
     *
     * @throws \Exception
     *   Always, because you cannot set the PO header of a reader.
     */
    public 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;
        $conditions = [];
        if (array_sum($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.
                    $conditions['customized'] = LOCALE_CUSTOMIZED;
                }
                // Else no filtering needed in this case.
            }
            else {
                if ($options['not_customized']) {
                    // Filter for non-customized strings only.
                    $conditions['customized'] = LOCALE_NOT_CUSTOMIZED;
                }
                else {
                    // Filter for strings without translation.
                    $conditions['translated'] = FALSE;
                }
            }
            if (!$options['not_translated']) {
                // Filter for string with translation.
                $conditions['translated'] = TRUE;
            }
            return \Drupal::service('locale.storage')->getTranslations($conditions);
        }
        else {
            // If no language, we don't need any of the target fields.
            return \Drupal::service('locale.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);
    }
    
    /**
     * {@inheritdoc}
     */
    public function readItem() {
        if ($string = $this->readString()) {
            $values = (array) $string;
            $po_item = new PoItem();
            $po_item->setFromArray($values);
            return $po_item;
        }
    }

}

Classes

Title Deprecated Summary
PoDatabaseReader Gettext PO reader working with the locale module database.

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.