81 lines
2.7 KiB
PHP
81 lines
2.7 KiB
PHP
<?php
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/**
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* Name: Compact Language Detector
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* Description: Improved language detection
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* Version: 0.1
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* Author: Michael Vogel <heluecht@pirati.ca>
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*/
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use Friendica\Core\Hook;
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use Friendica\Core\Logger;
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use Friendica\DI;
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function cld_install()
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{
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Hook::register('detect_languages', __FILE__, 'cld_detect_languages');
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}
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function cld_detect_languages(array &$data)
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{
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if (!in_array('cld2', get_loaded_extensions())) {
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Logger::warning('CLD2 is not installed.');
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return;
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}
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if (!class_exists('CLD2Detector')) {
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Logger::warning('CLD2Detector class does not exist.');
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return;
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}
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if (!class_exists('CLD2Encoding')) {
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Logger::warning('CLD2Encoding class does not exist.');
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return;
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}
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$cld2 = new \CLD2Detector();
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$cld2->setEncodingHint(CLD2Encoding::UTF8); // optional, hints about text encoding
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$cld2->setPlainText(true);
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$result = $cld2->detect($data['text']);
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if ($data['detected']) {
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$original = array_key_first($data['detected']);
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} else {
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$original = '';
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}
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$detected = DI::l10n()->toISO6391($result['language_code']);
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// languages that aren't supported via the base language detection or tend to false detections
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if ((strlen($detected) == 3) || in_array($detected, ['ht', 'kk', 'ku', 'ky', 'lg', 'mg', 'mk', 'mt', 'ny', 'rw', 'st', 'su', 'tg', 'ts', 'xx'])) {
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return;
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}
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if (!$result['is_reliable']) {
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Logger::debug('Unreliable detection', ['uri-id' => $data['uri-id'], 'original' => $original, 'detected' => $detected, 'name' => $result['language_name'], 'probability' => $result['language_probability'], 'text' => $data['text']]);
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if (($original == $detected) && ($data['detected'][$original] < $result['language_probability'] / 100)) {
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$data['detected'][$original] = $result['language_probability'] / 100;
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}
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return;
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}
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$available = array_keys(DI::l10n()->getLanguageCodes());
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if (!in_array($detected, $available)) {
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Logger::debug('Unsupported language', ['uri-id' => $data['uri-id'], 'original' => $original, 'detected' => $detected, 'name' => $result['language_name'], 'probability' => $result['language_probability'], 'text' => $data['text']]);
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return;
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}
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if ($original != $detected) {
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Logger::debug('Detected different language', ['uri-id' => $data['uri-id'], 'original' => $original, 'detected' => $detected, 'name' => $result['language_name'], 'probability' => $result['language_probability'], 'text' => $data['text']]);
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}
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$length = count($data['detected']);
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if ($length > 0) {
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unset($data['detected'][$detected]);
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$data['detected'] = array_merge([$detected => $result['language_probability'] / 100], array_slice($data['detected'], 0, $length - 1));
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} else {
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$data['detected'] = [$detected => $result['language_probability'] / 100];
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}
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}
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