/**
* Converts a year in Japanese format into Western format.
*
* @param $year : kanji or hiragana era name followed by digits, or era name in romaji, space and digit. I.e. : 明治33, めいじ33, Meiji 33
* @return string|array : The year(s) in Western format.
* @throws Exception
*/
public static function toWesternYear($year)
{
if (Analyzer::hasKanji($year)) {
$key = 'kanji';
$eraName = Helper::extractKanji($year);
$eraName = $eraName[0];
$eraValue = (int) Helper::subString($year, Analyzer::length($eraName), Analyzer::length($year));
} elseif (Analyzer::hasHiragana($year)) {
$key = 'kana';
$eraName = Helper::extractHiragana($year);
$eraName = $eraName[0];
$eraValue = (int) Helper::subString($year, Analyzer::length($eraName), Analyzer::length($year));
} else {
$key = 'romaji';
$year = strtolower($year);
$parts = explode(' ', $year);
$eraName = $parts[0];
$eraValue = (int) $parts[1];
}
if (empty($eraName) || empty($eraValue)) {
throw new Exception('Invalid year ' . $year);
}
$max = count(self::$mapEras);
$westernYears = array();
for ($i = 0; $i < $max; $i++) {
$era = self::$mapEras[$i];
$overflown = false;
if (strtolower($era[$key]) == $eraName) {
$eraStart = $era['year'];
$westernYear = $eraStart + $eraValue - 1;
if ($i < $max - 1) {
$nextEra = self::$mapEras[$i + 1];
$nextEraYear = $nextEra['year'];
if ($westernYear > $nextEraYear) {
$overflown = true;
}
}
$westernYears[] = array('value' => $westernYear, 'overflown' => $overflown);
}
}
$results = array();
foreach ($westernYears as $westernYear) {
if (!$westernYear['overflown']) {
$results[] = $westernYear['value'];
}
}
if (empty($results)) {
throw new Exception('Year ' . $year . ' is invalid');
} elseif (count($results) == 1) {
return $results[0];
} else {
return $results;
}
}
/**
* Inflects radical for the given verb to the given form
*
* @param array $verb
* @param $form
* @return array
*/
public static function getRadicals(array $verb, $form)
{
$kanji = $verb['kanji'];
$kana = $verb['kana'];
$type = $verb['type'];
if ($type == 'k') {
switch ($form) {
case self::NON_PAST_NEGATIVE:
case self::PAST_NEGATIVE:
case self::PASSIVE:
case self::PASSIVE_SUSPENSIVE:
case self::IMPERATIVE_POLITE_NEGATIVE:
case self::IMPERATIVE_HARD:
case self::FACTITIVE:
case self::FACTITIVE_SHORTENED:
case self::POTENTIAL_NEUTRAL:
case self::POTENTIAL_POLITE:
case self::VOLITIONAL_FAMILIAR:
case self::NOT_LOOK_LIKE_POLITE:
case self::NOT_LOOK_LIKE_NEUTRAL:
$kanaRadical = 'こ';
break;
default:
$kanaRadical = 'き';
}
} elseif ($type == 's-i') {
$kanaRadical = '';
} else {
$kanaRadical = Helper::subString($kana, 0, Analyzer::length($kana) - 1);
}
if (!empty($kanji)) {
$kanjiRadical = Helper::subString($kanji, 0, Analyzer::length($kanji) - 1);
} else {
$kanjiRadical = null;
}
return array('kanji' => $kanjiRadical, 'kana' => $kanaRadical);
}
public function testLenghtOfAnEmptyString()
{
$result = Analyzer::length('');
$this->assertEquals(0, $result);
}
/**
* Transliterate proper combinaisons of latin alphabet characters into
* Sokuon (http://en.wikipedia.org/wiki/Sokuon) characters.
*
* @param string $str String to be transliterated.
* @param array $parameters Sokuon character.
*
* @return string Transliterated string.
*/
protected function transliterateSokuon($str, $parameters)
{
$new_str = $str;
$length = Analyzer::length($str);
//No need to go further.
if ($length < 2) {
return $new_str;
}
$skip = array('a', 'i', 'u', 'e', 'o', 'n');
for ($i = 1; $i < $length; $i++) {
$prev_char = substr($str, $i - 1, 1);
if (!in_array($prev_char, $skip)) {
// Don't forget Hepburn special case: ch > tch
if ($prev_char === substr($str, $i, 1) || $prev_char === 't' && substr($str, $i, 2) === 'ch') {
$new_str = substr_replace($str, $parameters['sokuon'], $i - 1, 1);
}
}
}
return $new_str;
}