AbstractString.php 18 KB

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  1. <?php
  2. /*
  3. * This file is part of the Symfony package.
  4. *
  5. * (c) Fabien Potencier <fabien@symfony.com>
  6. *
  7. * For the full copyright and license information, please view the LICENSE
  8. * file that was distributed with this source code.
  9. */
  10. namespace Symfony\Component\String;
  11. use Symfony\Component\String\Exception\ExceptionInterface;
  12. use Symfony\Component\String\Exception\InvalidArgumentException;
  13. use Symfony\Component\String\Exception\RuntimeException;
  14. /**
  15. * Represents a string of abstract characters.
  16. *
  17. * Unicode defines 3 types of "characters" (bytes, code points and grapheme clusters).
  18. * This class is the abstract type to use as a type-hint when the logic you want to
  19. * implement doesn't care about the exact variant it deals with.
  20. *
  21. * @author Nicolas Grekas <p@tchwork.com>
  22. * @author Hugo Hamon <hugohamon@neuf.fr>
  23. *
  24. * @throws ExceptionInterface
  25. */
  26. abstract class AbstractString implements \Stringable, \JsonSerializable
  27. {
  28. public const PREG_PATTERN_ORDER = \PREG_PATTERN_ORDER;
  29. public const PREG_SET_ORDER = \PREG_SET_ORDER;
  30. public const PREG_OFFSET_CAPTURE = \PREG_OFFSET_CAPTURE;
  31. public const PREG_UNMATCHED_AS_NULL = \PREG_UNMATCHED_AS_NULL;
  32. public const PREG_SPLIT = 0;
  33. public const PREG_SPLIT_NO_EMPTY = \PREG_SPLIT_NO_EMPTY;
  34. public const PREG_SPLIT_DELIM_CAPTURE = \PREG_SPLIT_DELIM_CAPTURE;
  35. public const PREG_SPLIT_OFFSET_CAPTURE = \PREG_SPLIT_OFFSET_CAPTURE;
  36. protected $string = '';
  37. protected $ignoreCase = false;
  38. abstract public function __construct(string $string = '');
  39. /**
  40. * Unwraps instances of AbstractString back to strings.
  41. *
  42. * @return string[]|array
  43. */
  44. public static function unwrap(array $values): array
  45. {
  46. foreach ($values as $k => $v) {
  47. if ($v instanceof self) {
  48. $values[$k] = $v->__toString();
  49. } elseif (\is_array($v) && $values[$k] !== $v = static::unwrap($v)) {
  50. $values[$k] = $v;
  51. }
  52. }
  53. return $values;
  54. }
  55. /**
  56. * Wraps (and normalizes) strings in instances of AbstractString.
  57. *
  58. * @return static[]|array
  59. */
  60. public static function wrap(array $values): array
  61. {
  62. $i = 0;
  63. $keys = null;
  64. foreach ($values as $k => $v) {
  65. if (\is_string($k) && '' !== $k && $k !== $j = (string) new static($k)) {
  66. $keys ??= array_keys($values);
  67. $keys[$i] = $j;
  68. }
  69. if (\is_string($v)) {
  70. $values[$k] = new static($v);
  71. } elseif (\is_array($v) && $values[$k] !== $v = static::wrap($v)) {
  72. $values[$k] = $v;
  73. }
  74. ++$i;
  75. }
  76. return null !== $keys ? array_combine($keys, $values) : $values;
  77. }
  78. /**
  79. * @param string|string[] $needle
  80. */
  81. public function after(string|iterable $needle, bool $includeNeedle = false, int $offset = 0): static
  82. {
  83. $str = clone $this;
  84. $i = \PHP_INT_MAX;
  85. if (\is_string($needle)) {
  86. $needle = [$needle];
  87. }
  88. foreach ($needle as $n) {
  89. $n = (string) $n;
  90. $j = $this->indexOf($n, $offset);
  91. if (null !== $j && $j < $i) {
  92. $i = $j;
  93. $str->string = $n;
  94. }
  95. }
  96. if (\PHP_INT_MAX === $i) {
  97. return $str;
  98. }
  99. if (!$includeNeedle) {
  100. $i += $str->length();
  101. }
  102. return $this->slice($i);
  103. }
  104. /**
  105. * @param string|string[] $needle
  106. */
  107. public function afterLast(string|iterable $needle, bool $includeNeedle = false, int $offset = 0): static
  108. {
  109. $str = clone $this;
  110. $i = null;
  111. if (\is_string($needle)) {
  112. $needle = [$needle];
  113. }
  114. foreach ($needle as $n) {
  115. $n = (string) $n;
  116. $j = $this->indexOfLast($n, $offset);
  117. if (null !== $j && $j >= $i) {
  118. $i = $offset = $j;
  119. $str->string = $n;
  120. }
  121. }
  122. if (null === $i) {
  123. return $str;
  124. }
  125. if (!$includeNeedle) {
  126. $i += $str->length();
  127. }
  128. return $this->slice($i);
  129. }
  130. abstract public function append(string ...$suffix): static;
  131. /**
  132. * @param string|string[] $needle
  133. */
  134. public function before(string|iterable $needle, bool $includeNeedle = false, int $offset = 0): static
  135. {
  136. $str = clone $this;
  137. $i = \PHP_INT_MAX;
  138. if (\is_string($needle)) {
  139. $needle = [$needle];
  140. }
  141. foreach ($needle as $n) {
  142. $n = (string) $n;
  143. $j = $this->indexOf($n, $offset);
  144. if (null !== $j && $j < $i) {
  145. $i = $j;
  146. $str->string = $n;
  147. }
  148. }
  149. if (\PHP_INT_MAX === $i) {
  150. return $str;
  151. }
  152. if ($includeNeedle) {
  153. $i += $str->length();
  154. }
  155. return $this->slice(0, $i);
  156. }
  157. /**
  158. * @param string|string[] $needle
  159. */
  160. public function beforeLast(string|iterable $needle, bool $includeNeedle = false, int $offset = 0): static
  161. {
  162. $str = clone $this;
  163. $i = null;
  164. if (\is_string($needle)) {
  165. $needle = [$needle];
  166. }
  167. foreach ($needle as $n) {
  168. $n = (string) $n;
  169. $j = $this->indexOfLast($n, $offset);
  170. if (null !== $j && $j >= $i) {
  171. $i = $offset = $j;
  172. $str->string = $n;
  173. }
  174. }
  175. if (null === $i) {
  176. return $str;
  177. }
  178. if ($includeNeedle) {
  179. $i += $str->length();
  180. }
  181. return $this->slice(0, $i);
  182. }
  183. /**
  184. * @return int[]
  185. */
  186. public function bytesAt(int $offset): array
  187. {
  188. $str = $this->slice($offset, 1);
  189. return '' === $str->string ? [] : array_values(unpack('C*', $str->string));
  190. }
  191. abstract public function camel(): static;
  192. /**
  193. * @return static[]
  194. */
  195. abstract public function chunk(int $length = 1): array;
  196. public function collapseWhitespace(): static
  197. {
  198. $str = clone $this;
  199. $str->string = trim(preg_replace("/(?:[ \n\r\t\x0C]{2,}+|[\n\r\t\x0C])/", ' ', $str->string), " \n\r\t\x0C");
  200. return $str;
  201. }
  202. /**
  203. * @param string|string[] $needle
  204. */
  205. public function containsAny(string|iterable $needle): bool
  206. {
  207. return null !== $this->indexOf($needle);
  208. }
  209. /**
  210. * @param string|string[] $suffix
  211. */
  212. public function endsWith(string|iterable $suffix): bool
  213. {
  214. if (\is_string($suffix)) {
  215. throw new \TypeError(sprintf('Method "%s()" must be overridden by class "%s" to deal with non-iterable values.', __FUNCTION__, static::class));
  216. }
  217. foreach ($suffix as $s) {
  218. if ($this->endsWith((string) $s)) {
  219. return true;
  220. }
  221. }
  222. return false;
  223. }
  224. public function ensureEnd(string $suffix): static
  225. {
  226. if (!$this->endsWith($suffix)) {
  227. return $this->append($suffix);
  228. }
  229. $suffix = preg_quote($suffix);
  230. $regex = '{('.$suffix.')(?:'.$suffix.')++$}D';
  231. return $this->replaceMatches($regex.($this->ignoreCase ? 'i' : ''), '$1');
  232. }
  233. public function ensureStart(string $prefix): static
  234. {
  235. $prefix = new static($prefix);
  236. if (!$this->startsWith($prefix)) {
  237. return $this->prepend($prefix);
  238. }
  239. $str = clone $this;
  240. $i = $prefixLen = $prefix->length();
  241. while ($this->indexOf($prefix, $i) === $i) {
  242. $str = $str->slice($prefixLen);
  243. $i += $prefixLen;
  244. }
  245. return $str;
  246. }
  247. /**
  248. * @param string|string[] $string
  249. */
  250. public function equalsTo(string|iterable $string): bool
  251. {
  252. if (\is_string($string)) {
  253. throw new \TypeError(sprintf('Method "%s()" must be overridden by class "%s" to deal with non-iterable values.', __FUNCTION__, static::class));
  254. }
  255. foreach ($string as $s) {
  256. if ($this->equalsTo((string) $s)) {
  257. return true;
  258. }
  259. }
  260. return false;
  261. }
  262. abstract public function folded(): static;
  263. public function ignoreCase(): static
  264. {
  265. $str = clone $this;
  266. $str->ignoreCase = true;
  267. return $str;
  268. }
  269. /**
  270. * @param string|string[] $needle
  271. */
  272. public function indexOf(string|iterable $needle, int $offset = 0): ?int
  273. {
  274. if (\is_string($needle)) {
  275. throw new \TypeError(sprintf('Method "%s()" must be overridden by class "%s" to deal with non-iterable values.', __FUNCTION__, static::class));
  276. }
  277. $i = \PHP_INT_MAX;
  278. foreach ($needle as $n) {
  279. $j = $this->indexOf((string) $n, $offset);
  280. if (null !== $j && $j < $i) {
  281. $i = $j;
  282. }
  283. }
  284. return \PHP_INT_MAX === $i ? null : $i;
  285. }
  286. /**
  287. * @param string|string[] $needle
  288. */
  289. public function indexOfLast(string|iterable $needle, int $offset = 0): ?int
  290. {
  291. if (\is_string($needle)) {
  292. throw new \TypeError(sprintf('Method "%s()" must be overridden by class "%s" to deal with non-iterable values.', __FUNCTION__, static::class));
  293. }
  294. $i = null;
  295. foreach ($needle as $n) {
  296. $j = $this->indexOfLast((string) $n, $offset);
  297. if (null !== $j && $j >= $i) {
  298. $i = $offset = $j;
  299. }
  300. }
  301. return $i;
  302. }
  303. public function isEmpty(): bool
  304. {
  305. return '' === $this->string;
  306. }
  307. abstract public function join(array $strings, ?string $lastGlue = null): static;
  308. public function jsonSerialize(): string
  309. {
  310. return $this->string;
  311. }
  312. abstract public function length(): int;
  313. abstract public function lower(): static;
  314. /**
  315. * Matches the string using a regular expression.
  316. *
  317. * Pass PREG_PATTERN_ORDER or PREG_SET_ORDER as $flags to get all occurrences matching the regular expression.
  318. *
  319. * @return array All matches in a multi-dimensional array ordered according to flags
  320. */
  321. abstract public function match(string $regexp, int $flags = 0, int $offset = 0): array;
  322. abstract public function padBoth(int $length, string $padStr = ' '): static;
  323. abstract public function padEnd(int $length, string $padStr = ' '): static;
  324. abstract public function padStart(int $length, string $padStr = ' '): static;
  325. abstract public function prepend(string ...$prefix): static;
  326. public function repeat(int $multiplier): static
  327. {
  328. if (0 > $multiplier) {
  329. throw new InvalidArgumentException(sprintf('Multiplier must be positive, %d given.', $multiplier));
  330. }
  331. $str = clone $this;
  332. $str->string = str_repeat($str->string, $multiplier);
  333. return $str;
  334. }
  335. abstract public function replace(string $from, string $to): static;
  336. abstract public function replaceMatches(string $fromRegexp, string|callable $to): static;
  337. abstract public function reverse(): static;
  338. abstract public function slice(int $start = 0, ?int $length = null): static;
  339. abstract public function snake(): static;
  340. abstract public function splice(string $replacement, int $start = 0, ?int $length = null): static;
  341. /**
  342. * @return static[]
  343. */
  344. public function split(string $delimiter, ?int $limit = null, ?int $flags = null): array
  345. {
  346. if (null === $flags) {
  347. throw new \TypeError('Split behavior when $flags is null must be implemented by child classes.');
  348. }
  349. if ($this->ignoreCase) {
  350. $delimiter .= 'i';
  351. }
  352. set_error_handler(static fn ($t, $m) => throw new InvalidArgumentException($m));
  353. try {
  354. if (false === $chunks = preg_split($delimiter, $this->string, $limit, $flags)) {
  355. throw new RuntimeException('Splitting failed with error: '.preg_last_error_msg());
  356. }
  357. } finally {
  358. restore_error_handler();
  359. }
  360. $str = clone $this;
  361. if (self::PREG_SPLIT_OFFSET_CAPTURE & $flags) {
  362. foreach ($chunks as &$chunk) {
  363. $str->string = $chunk[0];
  364. $chunk[0] = clone $str;
  365. }
  366. } else {
  367. foreach ($chunks as &$chunk) {
  368. $str->string = $chunk;
  369. $chunk = clone $str;
  370. }
  371. }
  372. return $chunks;
  373. }
  374. /**
  375. * @param string|string[] $prefix
  376. */
  377. public function startsWith(string|iterable $prefix): bool
  378. {
  379. if (\is_string($prefix)) {
  380. throw new \TypeError(sprintf('Method "%s()" must be overridden by class "%s" to deal with non-iterable values.', __FUNCTION__, static::class));
  381. }
  382. foreach ($prefix as $prefix) {
  383. if ($this->startsWith((string) $prefix)) {
  384. return true;
  385. }
  386. }
  387. return false;
  388. }
  389. abstract public function title(bool $allWords = false): static;
  390. public function toByteString(?string $toEncoding = null): ByteString
  391. {
  392. $b = new ByteString();
  393. $toEncoding = \in_array($toEncoding, ['utf8', 'utf-8', 'UTF8'], true) ? 'UTF-8' : $toEncoding;
  394. if (null === $toEncoding || $toEncoding === $fromEncoding = $this instanceof AbstractUnicodeString || preg_match('//u', $b->string) ? 'UTF-8' : 'Windows-1252') {
  395. $b->string = $this->string;
  396. return $b;
  397. }
  398. try {
  399. $b->string = mb_convert_encoding($this->string, $toEncoding, 'UTF-8');
  400. } catch (\ValueError $e) {
  401. if (!\function_exists('iconv')) {
  402. throw new InvalidArgumentException($e->getMessage(), $e->getCode(), $e);
  403. }
  404. $b->string = iconv('UTF-8', $toEncoding, $this->string);
  405. }
  406. return $b;
  407. }
  408. public function toCodePointString(): CodePointString
  409. {
  410. return new CodePointString($this->string);
  411. }
  412. public function toString(): string
  413. {
  414. return $this->string;
  415. }
  416. public function toUnicodeString(): UnicodeString
  417. {
  418. return new UnicodeString($this->string);
  419. }
  420. abstract public function trim(string $chars = " \t\n\r\0\x0B\x0C\u{A0}\u{FEFF}"): static;
  421. abstract public function trimEnd(string $chars = " \t\n\r\0\x0B\x0C\u{A0}\u{FEFF}"): static;
  422. /**
  423. * @param string|string[] $prefix
  424. */
  425. public function trimPrefix($prefix): static
  426. {
  427. if (\is_array($prefix) || $prefix instanceof \Traversable) { // don't use is_iterable(), it's slow
  428. foreach ($prefix as $s) {
  429. $t = $this->trimPrefix($s);
  430. if ($t->string !== $this->string) {
  431. return $t;
  432. }
  433. }
  434. return clone $this;
  435. }
  436. $str = clone $this;
  437. if ($prefix instanceof self) {
  438. $prefix = $prefix->string;
  439. } else {
  440. $prefix = (string) $prefix;
  441. }
  442. if ('' !== $prefix && \strlen($this->string) >= \strlen($prefix) && 0 === substr_compare($this->string, $prefix, 0, \strlen($prefix), $this->ignoreCase)) {
  443. $str->string = substr($this->string, \strlen($prefix));
  444. }
  445. return $str;
  446. }
  447. abstract public function trimStart(string $chars = " \t\n\r\0\x0B\x0C\u{A0}\u{FEFF}"): static;
  448. /**
  449. * @param string|string[] $suffix
  450. */
  451. public function trimSuffix($suffix): static
  452. {
  453. if (\is_array($suffix) || $suffix instanceof \Traversable) { // don't use is_iterable(), it's slow
  454. foreach ($suffix as $s) {
  455. $t = $this->trimSuffix($s);
  456. if ($t->string !== $this->string) {
  457. return $t;
  458. }
  459. }
  460. return clone $this;
  461. }
  462. $str = clone $this;
  463. if ($suffix instanceof self) {
  464. $suffix = $suffix->string;
  465. } else {
  466. $suffix = (string) $suffix;
  467. }
  468. if ('' !== $suffix && \strlen($this->string) >= \strlen($suffix) && 0 === substr_compare($this->string, $suffix, -\strlen($suffix), null, $this->ignoreCase)) {
  469. $str->string = substr($this->string, 0, -\strlen($suffix));
  470. }
  471. return $str;
  472. }
  473. public function truncate(int $length, string $ellipsis = '', bool $cut = true): static
  474. {
  475. $stringLength = $this->length();
  476. if ($stringLength <= $length) {
  477. return clone $this;
  478. }
  479. $ellipsisLength = '' !== $ellipsis ? (new static($ellipsis))->length() : 0;
  480. if ($length < $ellipsisLength) {
  481. $ellipsisLength = 0;
  482. }
  483. if (!$cut) {
  484. if (null === $length = $this->indexOf([' ', "\r", "\n", "\t"], ($length ?: 1) - 1)) {
  485. return clone $this;
  486. }
  487. $length += $ellipsisLength;
  488. }
  489. $str = $this->slice(0, $length - $ellipsisLength);
  490. return $ellipsisLength ? $str->trimEnd()->append($ellipsis) : $str;
  491. }
  492. abstract public function upper(): static;
  493. /**
  494. * Returns the printable length on a terminal.
  495. */
  496. abstract public function width(bool $ignoreAnsiDecoration = true): int;
  497. public function wordwrap(int $width = 75, string $break = "\n", bool $cut = false): static
  498. {
  499. $lines = '' !== $break ? $this->split($break) : [clone $this];
  500. $chars = [];
  501. $mask = '';
  502. if (1 === \count($lines) && '' === $lines[0]->string) {
  503. return $lines[0];
  504. }
  505. foreach ($lines as $i => $line) {
  506. if ($i) {
  507. $chars[] = $break;
  508. $mask .= '#';
  509. }
  510. foreach ($line->chunk() as $char) {
  511. $chars[] = $char->string;
  512. $mask .= ' ' === $char->string ? ' ' : '?';
  513. }
  514. }
  515. $string = '';
  516. $j = 0;
  517. $b = $i = -1;
  518. $mask = wordwrap($mask, $width, '#', $cut);
  519. while (false !== $b = strpos($mask, '#', $b + 1)) {
  520. for (++$i; $i < $b; ++$i) {
  521. $string .= $chars[$j];
  522. unset($chars[$j++]);
  523. }
  524. if ($break === $chars[$j] || ' ' === $chars[$j]) {
  525. unset($chars[$j++]);
  526. }
  527. $string .= $break;
  528. }
  529. $str = clone $this;
  530. $str->string = $string.implode('', $chars);
  531. return $str;
  532. }
  533. public function __sleep(): array
  534. {
  535. return ['string'];
  536. }
  537. public function __clone()
  538. {
  539. $this->ignoreCase = false;
  540. }
  541. public function __toString(): string
  542. {
  543. return $this->string;
  544. }
  545. }