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<?php |
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/** |
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* @author Joas Schilling <[email protected]> |
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* @author Thomas Müller <[email protected]> |
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* |
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* @copyright Copyright (c) 2017, ownCloud GmbH |
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* @license AGPL-3.0 |
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* |
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* This code is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License, version 3, |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License, version 3, |
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* along with this program. If not, see <http://www.gnu.org/licenses/> |
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* |
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*/ |
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namespace OC\L10N; |
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use OCP\IL10N; |
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use OCP\L10N\IFactory; |
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use Punic\Calendar; |
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use Symfony\Component\Translation\PluralizationRules; |
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class L10N implements IL10N { |
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/** @var IFactory */ |
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protected $factory; |
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/** @var string App of this object */ |
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protected $app; |
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/** @var string Language of this object */ |
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protected $lang; |
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/** @var string[] */ |
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private $translations = []; |
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/** |
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* @param IFactory $factory |
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* @param string $app |
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* @param string $lang |
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* @param array $files |
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*/ |
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public function __construct(IFactory $factory, $app, $lang, array $files) { |
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$this->factory = $factory; |
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$this->app = $app; |
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$this->lang = $lang; |
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$this->translations = []; |
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foreach ($files as $languageFile) { |
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$this->load($languageFile); |
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} |
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} |
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/** |
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* The code (en, de, ...) of the language that is used for this instance |
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* |
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* @return string language |
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*/ |
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public function getLanguageCode() { |
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return $this->lang; |
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} |
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/** |
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* Translating |
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* @param string $text The text we need a translation for |
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* @param array $parameters default:array() Parameters for sprintf |
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* @return string Translation or the same text |
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* |
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* Returns the translation. If no translation is found, $text will be |
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* returned. |
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*/ |
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public function t($text, $parameters = []) { |
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return (string) new L10NString($this, $text, $parameters); |
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} |
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/** |
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* Translating |
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* @param string $text_singular the string to translate for exactly one object |
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* @param string $text_plural the string to translate for n objects |
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* @param integer $count Number of objects |
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* @param array $parameters default:array() Parameters for sprintf |
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* @return string Translation or the same text |
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* |
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* Returns the translation. If no translation is found, $text will be |
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* returned. %n will be replaced with the number of objects. |
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* |
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* The correct plural is determined by the plural_forms-function |
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* provided by the po file. |
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* |
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*/ |
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public function n($text_singular, $text_plural, $count, $parameters = []) { |
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$identifier = "_${text_singular}_::_${text_plural}_"; |
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if (isset($this->translations[$identifier])) { |
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return (string) new L10NString($this, $identifier, $parameters, $count); |
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} else { |
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if ($count === 1) { |
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return (string) new L10NString($this, $text_singular, $parameters, $count); |
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} else { |
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return (string) new L10NString($this, $text_plural, $parameters, $count); |
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} |
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} |
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} |
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/** |
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* Localization |
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* @param string $type Type of localization |
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* @param \DateTime|int|string $data parameters for this localization |
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* @param array $options |
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* @return string|int|false |
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* |
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* Returns the localized data. |
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* |
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* Implemented types: |
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* - date |
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* - Creates a date |
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* - params: timestamp (int/string) |
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* - datetime |
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* - Creates date and time |
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* - params: timestamp (int/string) |
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* - time |
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* - Creates a time |
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* - params: timestamp (int/string) |
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* - firstday: Returns the first day of the week (0 sunday - 6 saturday) |
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* - jsdate: Returns the short JS date format |
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*/ |
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public function l($type, $data = null, $options = []) { |
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// Use the language of the instance |
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$locale = $this->getLanguageCode(); |
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if ($locale === 'sr@latin') { |
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$locale = 'sr_latn'; |
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} |
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if ($type === 'firstday') { |
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return (int) Calendar::getFirstWeekday($locale); |
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} |
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if ($type === 'jsdate') { |
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return (string) Calendar::getDateFormat('short', $locale); |
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} |
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$value = new \DateTime(); |
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if ($data instanceof \DateTime) { |
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$value = $data; |
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} else if (is_string($data) && !is_numeric($data)) { |
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$data = strtotime($data); |
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$value->setTimestamp($data); |
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} else if ($data !== null) { |
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$value->setTimestamp($data); |
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} |
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$options = array_merge(['width' => 'long'], $options); |
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$width = $options['width']; |
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switch ($type) { |
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case 'date': |
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return (string) Calendar::formatDate($value, $width, $locale); |
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case 'datetime': |
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return (string) Calendar::formatDatetime($value, $width, $locale); |
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case 'time': |
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return (string) Calendar::formatTime($value, $width, $locale); |
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default: |
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return false; |
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} |
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} |
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/** |
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* Returns an associative array with all translations |
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* |
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* Called by String |
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* @return array |
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*/ |
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public function getTranslations() { |
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return $this->translations; |
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} |
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/** |
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* @param $translationFile |
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* @return bool |
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*/ |
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protected function load($translationFile) { |
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$json = json_decode(file_get_contents($translationFile), true); |
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if (!is_array($json)) { |
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$jsonError = json_last_error(); |
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\OC::$server->getLogger()->warning("Failed to load $translationFile - json error code: $jsonError", ['app' => 'l10n']); |
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return false; |
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} |
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$this->translations = array_merge($this->translations, $json['translations']); |
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return true; |
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} |
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/** |
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* Computes the plural form |
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* |
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* @param int $number |
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* @return int |
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*/ |
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public function computePlural($number) { |
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return PluralizationRules::get($number, $this->lang); |
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} |
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} |
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If you return a value from a function or method, it should be a sub-type of the type that is given by the parent type f.e. an interface, or abstract method. This is more formally defined by the Lizkov substitution principle, and guarantees that classes that depend on the parent type can use any instance of a child type interchangably. This principle also belongs to the SOLID principles for object oriented design.
Let’s take a look at an example:
Our function
my_functionexpects aPostobject, and outputs the author of the post. The base classPostreturns a simple string and outputting a simple string will work just fine. However, the child classBlogPostwhich is a sub-type ofPostinstead decided to return anobject, and is therefore violating the SOLID principles. If aBlogPostwere passed tomy_function, PHP would not complain, but ultimately fail when executing thestrtouppercall in its body.