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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** |
| 6 | * This file is part of php-fast-forward/iterators. |
| 7 | * |
| 8 | * This source file is subject to the license that is bundled |
| 9 | * with this source code in the file LICENSE. |
| 10 | * |
| 11 | * @copyright Copyright (c) 2025-2026 Felipe Sayão Lobato Abreu <github@mentordosnerds.com> |
| 12 | * @license https://opensource.org/licenses/MIT MIT License |
| 13 | * |
| 14 | * @see https://github.com/php-fast-forward/iterators |
| 15 | * @see https://github.com/php-fast-forward |
| 16 | * @see https://datatracker.ietf.org/doc/html/rfc2119 |
| 17 | */ |
| 18 | |
| 19 | namespace FastForward\Iterator; |
| 20 | |
| 21 | /** |
| 22 | * An iterator that trims each value within a `iterable`. |
| 23 | * |
| 24 | * This class extends `ClosureIteratorIterator` and applies `trim()` |
| 25 | * to each element, removing leading and trailing characters based on |
| 26 | * the specified character mask. |
| 27 | * |
| 28 | * ## Usage Example: |
| 29 | * |
| 30 | * @example Basic Usage |
| 31 | * ```php |
| 32 | * use FastForward\Iterator\TrimIteratorIterator; |
| 33 | * use ArrayIterator; |
| 34 | * |
| 35 | * $data = new ArrayIterator([" hello ", "\nworld\n", "\tPHP\t"]); |
| 36 | * $trimIterator = new TrimIteratorIterator($data); |
| 37 | * |
| 38 | * foreach ($trimIterator as $value) { |
| 39 | * echo $value . ' | '; // Outputs: "hello | world | PHP | " |
| 40 | * } |
| 41 | * ``` |
| 42 | * @example Custom Trim Characters |
| 43 | * ```php |
| 44 | * use FastForward\Iterator\TrimIteratorIterator; |
| 45 | * use ArrayIterator; |
| 46 | * |
| 47 | * $data = new ArrayIterator(["--Hello--", "**World**", "!!PHP!!"]); |
| 48 | * $trimIterator = new TrimIteratorIterator($data, "-*!"); |
| 49 | * |
| 50 | * foreach ($trimIterator as $value) { |
| 51 | * echo $value . ' | '; // Outputs: "Hello | World | PHP | " |
| 52 | * } |
| 53 | * ``` |
| 54 | * |
| 55 | * **Note:** If `$characters` is `null`, the default trim characters |
| 56 | * (`" \n\r\t\v\x00"`) will be used. |
| 57 | * |
| 58 | * @since 1.0.0 |
| 59 | */ |
| 60 | class TrimIteratorIterator extends ClosureIteratorIterator |
| 61 | { |
| 62 | /** |
| 63 | * @var string the default characters to trim |
| 64 | */ |
| 65 | private const string DEFAULT_CHARACTERS = " \n\r\t\v\x00"; |
| 66 | |
| 67 | /** |
| 68 | * Initializes the TrimIteratorIterator. |
| 69 | * |
| 70 | * @param iterable $iterator the iterator containing values to be trimmed |
| 71 | * @param string|null $characters A string defining the characters to be trimmed. |
| 72 | * Defaults to standard whitespace characters. |
| 73 | */ |
| 74 | public function __construct(iterable $iterator, ?string $characters = self::DEFAULT_CHARACTERS) |
| 75 | { |
| 76 | parent::__construct( |
| 77 | new IterableIterator($iterator), |
| 78 | static fn($current): string => mb_trim($current, $characters ?? self::DEFAULT_CHARACTERS) |
| 79 | ); |
| 80 | } |
| 81 | } |