The language detection is now done in blocks
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Michael
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1723aa0697
commit
f4591b2cc7
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@ -228,6 +228,7 @@ Called after the language detection. This can be used for alternative language d
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- **text**: The text that is analyzed.
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- **detected**: (input/output) Array of language codes detected in the related text. The array key is the language code, the array value the probability.
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- **uri-id**: The Uri-Id of the item.
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- **author-id**: The id of the author contact.
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### addon_settings
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Called when generating the HTML for the addon settings page.
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@ -110,6 +110,7 @@ Dieser Hook kann dafür verwendet werden, alternative Erkennungsfunktionen einzu
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'text' => Der analysierte Text.
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'detected' => (Eingabe/Ausgabe) Das Array mit den erkannten Sprachen. Der Sprachcode ist der Array-Schlüssel, der Array-Wert ist der dezimale Wert für die Wahrscheinlichkeit.
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'uri-id' => Die Uri-Id des Beitrags
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'author-id' => Die Contact-id des Autors.
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**'addon_settings'** - wird aufgerufen, wenn die HTML-Ausgabe der Addon-Einstellungsseite generiert wird.
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$b ist die HTML-Ausgabe (String) der Addon-Einstellungsseite vor dem finalen "</form>"-Tag.
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@ -49,6 +49,7 @@ use Friendica\Util\Proxy;
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use Friendica\Util\Strings;
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use Friendica\Util\Temporal;
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use GuzzleHttp\Psr7\Uri;
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use IntlChar;
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use LanguageDetection\Language;
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class Item
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@ -2010,67 +2011,118 @@ class Item
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*/
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public static function getLanguageArray(string $body, int $count, int $uri_id = 0, int $author_id = 0): array
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{
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$naked_body = BBCode::toSearchText($body, $uri_id);
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$searchtext = BBCode::toSearchText($body, $uri_id);
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if ((count(explode(' ', $naked_body)) < 10) && (mb_strlen($naked_body) < 30) && $author_id) {
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if ((count(explode(' ', $searchtext)) < 10) && (mb_strlen($searchtext) < 30) && $author_id) {
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$author = Contact::selectFirst(['about'], ['id' => $author_id]);
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if (!empty($author['about'])) {
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$about = BBCode::toSearchText($author['about'], 0);
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$about = self::getDominantLanguage($about);
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Logger::debug('About field added', ['author' => $author_id, 'body' => $naked_body, 'about' => $about]);
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$naked_body .= ' ' . $about;
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Logger::debug('About field added', ['author' => $author_id, 'body' => $searchtext, 'about' => $about]);
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$searchtext .= ' ' . $about;
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}
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}
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if (empty($naked_body)) {
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if (empty($searchtext)) {
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return [];
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}
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$naked_body = self::getDominantLanguage($naked_body);
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$availableLanguages = DI::l10n()->getAvailableLanguages(true);
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$availableLanguages = DI::l10n()->convertForLanguageDetection($availableLanguages);
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$ld = new Language(array_keys($availableLanguages));
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$languages = $ld->detect($naked_body)->limit(0, $count)->close() ?: [];
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$data = [
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'text' => $naked_body,
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'detected' => $languages,
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'uri-id' => $uri_id,
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];
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$result = [];
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Hook::callAll('detect_languages', $data);
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$languages = $data['detected'];
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foreach (self::splitByBlocks($searchtext) as $block) {
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$languages = $ld->detect($block)->limit(0, $count)->close() ?: [];
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return $languages;
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$data = [
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'text' => $block,
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'detected' => $languages,
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'uri-id' => $uri_id,
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'author-id' => $author_id,
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];
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Hook::callAll('detect_languages', $data);
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foreach ($data['detected'] as $language => $quality) {
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$result[$language] = max($result[$language] ?? 0, $quality * (strlen($block) / strlen($searchtext)));
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}
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}
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arsort($result);
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$result = array_slice($result, 0, $count);
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return $result;
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}
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/**
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* Check if latin or non latin are dominant in the body and only return the dominant one
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* Split a string into different unicode blocks
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* Currently the text is split into the latin and the non latin part.
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*
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* @param string $body
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* @return string
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* @return array
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*/
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private static function getDominantLanguage(string $body): string
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private static function splitByBlocks(string $body): array
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{
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$latin = '';
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$non_latin = '';
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$blocks = [];
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$previous_block = 0;
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for ($i = 0; $i < mb_strlen($body); $i++) {
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$character = mb_substr($body, $i, 1);
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$ord = mb_ord($character);
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$previous = ($i > 0) ? mb_substr($body, $i - 1, 1) : '';
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$next = ($i < mb_strlen($body)) ? mb_substr($body, $i + 1, 1) : '';
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// We add the most common characters to both strings.
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if (($ord <= 64) || ($ord >= 91 && $ord <= 96) || ($ord >= 123 && $ord <= 191) || in_array($ord, [215, 247]) || ($ord >= 697 && $ord <= 735) || ($ord > 65535)) {
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$latin .= $character;
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$non_latin .= $character;
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} elseif ($ord < 768) {
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$latin .= $character;
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if (!IntlChar::isalpha($character)) {
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if (($previous != '') && (IntlChar::isalpha($previous))) {
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$previous_block = self::getBlockCode($previous);
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}
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$block = (($next != '') && IntlChar::isalpha($next)) ? self::getBlockCode($next) : $previous_block;
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$blocks[$block] = ($blocks[$block] ?? '') . $character;
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} else {
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$non_latin .= $character;
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$block = self::getBlockCode($character);
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$blocks[$block] = ($blocks[$block] ?? '') . $character;
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}
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}
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return (mb_strlen($latin) > mb_strlen($non_latin)) ? $latin : $non_latin;
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foreach (array_keys($blocks) as $key) {
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$blocks[$key] = trim($blocks[$key]);
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if (empty($blocks[$key])) {
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unset($blocks[$key]);
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}
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}
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return array_values($blocks);
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}
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/**
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* returns the block code for the given character
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*
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* @param string $character
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* @return integer 0 = no alpha character (blank, signs, emojis, ...), 1 = latin character, 2 = character in every other language
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*/
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private static function getBlockCode(string $character): int
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{
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if (!IntlChar::isalpha($character)) {
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return 0;
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}
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return self::isLatin($character) ? 1 : 2;
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}
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/**
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* Checks if the given character is in one of the latin code blocks
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*
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* @param string $character
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* @return boolean
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*/
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private static function isLatin(string $character): bool
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{
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return in_array(IntlChar::getBlockCode($character), [
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IntlChar::BLOCK_CODE_BASIC_LATIN, IntlChar::BLOCK_CODE_LATIN_1_SUPPLEMENT,
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IntlChar::BLOCK_CODE_LATIN_EXTENDED_A, IntlChar::BLOCK_CODE_LATIN_EXTENDED_B,
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IntlChar::BLOCK_CODE_LATIN_EXTENDED_C, IntlChar::BLOCK_CODE_LATIN_EXTENDED_D,
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IntlChar::BLOCK_CODE_LATIN_EXTENDED_E, IntlChar::BLOCK_CODE_LATIN_EXTENDED_ADDITIONAL
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]);
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}
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public static function getLanguageMessage(array $item): string
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