214 lines
6.2 KiB
PHP
214 lines
6.2 KiB
PHP
<?php
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/**
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* Plugin Name: i18n支持插件
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* Description: 为 WenPai.Org 提供以 GlotPress 为后端而不是以 mo 文件为后端的 i18n 支持
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* Version: 1.0
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* Author: 树新蜂
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* License: GPLv3
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* License URI: http://www.gnu.org/licenses/gpl-3.0.html
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*/
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namespace Platform;
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use DiDom\Document;
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use WP_Error;
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class i18n {
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const int|float CACHE_EXPIRE = 3 * DAY_IN_SECONDS;
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const string CACHE_GROUP = 'platform-i18n';
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private int $site = SITE_ID_TRANSLATE;
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/**
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* @var i18n|null
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*/
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private static ?i18n $instance = null;
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/**
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* @return i18n
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*/
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public static function get_instance(): i18n {
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if ( ! ( self::$instance instanceof i18n ) ) {
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self::$instance = new i18n();
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}
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return self::$instance;
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}
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/**
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* 翻译给定的原文
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*
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* 如果其中包含HTML标签，则只会将标签内容与数据库中的翻译条目对比。比如说<a>hello<b/>word</a>，这条句子会分别匹配hello和world
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* 特别地，对于包含 HTML 标签的原文，会在 HTML 标签中插入该原文在 GlotPress 项目中的ID
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*
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* @param string $cache_key 该原文的缓存键，如果为空则不缓存
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* @param string $content 要翻译的原文内容
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* @param string $gp_project_path GlotPress 中管理的项目路径
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* @param bool $no_wpautop 是否格式化
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*
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* @return string|WP_Error
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*/
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public function translate( string $cache_key, string $content, string $gp_project_path, bool $no_wpautop = false ): string|WP_Error {
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if ( empty( $content ) ) {
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return $content;
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}
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$cache_data = empty( $cache_key ) ? '' : wp_cache_get( $cache_key, self::CACHE_GROUP );
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if ( ! empty( $cache_data ) ) {
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return $cache_data;
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}
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$project = $this->get_gp_project( $gp_project_path );
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if ( empty( $project ) ) {
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return $content;
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}
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$originals = $this->get_gp_originals( $project->id );
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if ( empty( $originals ) ) {
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return $content;
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}
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$translation_set_id = $this->get_gp_translation_set_id( $project->id );
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if ( empty( $translation_set_id ) ) {
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return $content;
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}
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uasort( $originals, function ( $a, $b ) {
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$a_len = strlen( $a );
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$b_len = strlen( $b );
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return $a_len == $b_len ? 0 : ( $a_len > $b_len ? - 1 : 1 );
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} );
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//$content = $this->prepare_text( $content );
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$translations = $this->get_gp_translations( $originals, $translation_set_id );
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if ( empty( $translations ) ) {
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return $content;
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}
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$content = $this->do_translate( $content, $originals, $translations );
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if ( ! $no_wpautop ) {
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$content = wpautop( str_replace( '\\', '', $content ), false );
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}
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wp_cache_set( $cache_key, $content, self::CACHE_GROUP, self::CACHE_EXPIRE );
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return $content;
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}
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private function get_gp_project( string $path ) {
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global $wpdb;
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$sql = $wpdb->prepare( "SELECT * FROM wp_{$this->site}_gp_projects WHERE path = %s;", $path );
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return $wpdb->get_row( $sql );
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}
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private function get_gp_originals( $project_id ): array {
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global $wpdb;
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if ( empty( $project_id ) ) {
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return array();
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}
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$originals = $wpdb->get_results( $wpdb->prepare(
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"SELECT id, singular FROM wp_{$this->site}_gp_originals WHERE project_id = %d AND status = %s ORDER BY CHAR_LENGTH(singular) DESC",
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$project_id, '+active'
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), ARRAY_A );
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return array_column( $originals, 'singular', 'id' );
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}
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private function get_gp_translation_set_id( int $project_id ): int {
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global $wpdb;
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if ( empty( $project_id ) ) {
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return 0;
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}
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$sql = $wpdb->prepare( "SELECT * FROM wp_{$this->site}_gp_translation_sets WHERE project_id = %s AND locale=%s;", $project_id, 'zh-cn' );
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return $wpdb->get_row( $sql )->id ?? 0;
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}
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/**
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* 从wordpress.org上抓取的文本经过了一层转移，这个函数旨在将所有转移或未转义的字符都格式化为统一的格式
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*/
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private function prepare_text( string $string ): array|string {
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if ( empty( $string ) ) {
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return $string;
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}
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$string_p = &$string;
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$string_p = preg_replace( "/ rel=\"[\w|\s]*\"/m", '', $string_p );
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$string_p = str_replace( '-', '-', $string_p );
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$string_p = str_replace( '–', '-', $string_p );
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$string_p = str_replace( '–', '-', $string_p );
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$string_p = str_replace( '’', "'", $string_p );
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$string_p = str_replace( '”', '"', $string_p );
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$string_p = str_replace( '“', '"', $string_p );
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$string_p = str_replace( '&', '&', $string_p );
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return $string_p;
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}
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/**
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* 执行翻译，并为 HTML 标签插入原文 ID
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*/
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private function do_translate( string $content, array $originals, array $translations ): string {
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$dom = new Document();
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$dom->loadHtml( $content, LIBXML_HTML_NOIMPLIED | LIBXML_BIGLINES | LIBXML_HTML_NODEFDTD | LIBXML_PARSEHUGE | LIBXML_SCHEMA_CREATE );
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foreach ( $originals as $original_id => $original ) {
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$translation = $translations[ $original_id ] ?? $original;
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foreach ( $dom->toElement()->children() as $node ) {
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// 有一些用作列表的 HTML 标签，对于它们，需要取子元素
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$list_tag = array(
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'ol',
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'ul',
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);
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if ( ! empty( $node->getNode()->tagName ) && in_array( $node->getNode()->tagName, $list_tag ) ) {
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foreach ( $node->children() as $child_node ) {
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if ( ! empty( $child_node->innerHtml() ) ) {
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if ( str_contains( $child_node->innerHtml(), $original ) ) {
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$child_node->setAttribute( 'original_id', $original_id );
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$child_node->setInnerHtml( $translation );
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}
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}
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}
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} else {
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if ( ! empty( $node->innerHtml() ) ) {
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if ( str_contains( $node->innerHtml(), $original ) ) {
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$node->setAttribute( 'original_id', $original_id );
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$node->setInnerHtml( $translation );
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}
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}
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}
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}
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}
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return $dom->toElement()->html();
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}
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private function get_gp_translations( $originals, $translation_set_id ): array {
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global $wpdb;
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$translations = [];
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$raw_translations = $wpdb->get_results( $wpdb->prepare(
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"SELECT original_id, translation_0 FROM wp_{$this->site}_gp_translations WHERE original_id IN (" . implode( ', ', array_keys( $originals ) ) . ') AND translation_set_id = %d AND status = %s',
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$translation_set_id, 'current'
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) );
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foreach ( $raw_translations as $translation ) {
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$translations[ $translation->original_id ] = $translation->translation_0;
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}
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return $translations;
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}
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}
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