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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Drupal\name\Utility; |
| 6 | |
| 7 | use Drupal\Component\Utility\Html; |
| 8 | use Drupal\Component\Utility\Unicode; |
| 9 | |
| 10 | /** |
| 11 | * Applies string-transformation modifiers to a single token value. |
| 12 | * |
| 13 | * Modifier characters are L, U, F, G, T, S, B, and b. |
| 14 | * When the value is wrapped in a single outer <span>, the span is |
| 15 | * temporarily removed, the modifiers are applied to the inner text, and |
| 16 | * the span is re-applied to preserve markup-mode wrappers. |
| 17 | * |
| 18 | * @internal |
| 19 | */ |
| 20 | final class NameFormatModifiers { |
| 21 | |
| 22 | /** |
| 23 | * Default word-boundary pattern used by the B/b modifiers. |
| 24 | */ |
| 25 | const BOUNDARY_REGEXP = '/[\b,\s]/'; |
| 26 | |
| 27 | /** |
| 28 | * Applies case, trim, escape, and word-split modifiers to a string. |
| 29 | * |
| 30 | * @param string $string |
| 31 | * The value to modify. |
| 32 | * @param string $modifiers |
| 33 | * A sequence of modifier characters (L, U, F, G, T, S, B, b). |
| 34 | * @param string $boundary_regexp |
| 35 | * Word-boundary pattern used by B and b. |
| 36 | * |
| 37 | * @return string |
| 38 | * The modified string. |
| 39 | */ |
| 40 | public static function apply( |
| 41 | string $string, |
| 42 | string $modifiers, |
| 43 | string $boundary_regexp = self::BOUNDARY_REGEXP, |
| 44 | ): string { |
| 45 | $string_is_empty = (!strlen($string) || !$modifiers); |
| 46 | if ($string_is_empty) { |
| 47 | return $string; |
| 48 | } |
| 49 | |
| 50 | [$prefix, $string, $suffix] = self::stripSpanWrapper($string); |
| 51 | $handlers = self::modifierHandlers($boundary_regexp); |
| 52 | |
| 53 | for ($j = 0; $j < strlen($modifiers); $j += 1) { |
| 54 | $string = self::applySingleModifier($string, $modifiers[$j], $handlers); |
| 55 | } |
| 56 | |
| 57 | return $prefix . $string . $suffix; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Extracts a single wrapping span and returns wrapper + core string. |
| 62 | * |
| 63 | * @return array{0: string, 1: string, 2: string} |
| 64 | * Prefix, core value, and suffix. |
| 65 | */ |
| 66 | private static function stripSpanWrapper(string $string): array { |
| 67 | if (preg_match('/^(<span[^>]*>)(.*)(<\/span>)$/i', $string, $matches)) { |
| 68 | return [$matches[1], $matches[2], $matches[3]]; |
| 69 | } |
| 70 | |
| 71 | return ['', $string, '']; |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * Returns handlers for each supported modifier character. |
| 76 | * |
| 77 | * @param string $boundary_regexp |
| 78 | * Word-boundary pattern used by B and b. |
| 79 | * |
| 80 | * @return array<string, \Closure> |
| 81 | * Modifier handlers keyed by modifier character. |
| 82 | */ |
| 83 | private static function modifierHandlers(string $boundary_regexp): array { |
| 84 | return [ |
| 85 | 'L' => static fn (string $value): string => mb_strtolower($value), |
| 86 | 'U' => static fn (string $value): string => mb_strtoupper($value), |
| 87 | 'F' => static fn (string $value): string => Unicode::ucfirst($value), |
| 88 | 'G' => static fn (string $value): string => Unicode::ucwords($value), |
| 89 | 'T' => static fn (string $value): string => trim(preg_replace('/\s+/', ' ', $value)), |
| 90 | 'S' => static fn (string $value): string => Html::escape($value), |
| 91 | 'B' => static function (string $value) use ($boundary_regexp): string { |
| 92 | $parts = preg_split($boundary_regexp, $value); |
| 93 | return (string) array_shift($parts); |
| 94 | }, |
| 95 | 'b' => static function (string $value) use ($boundary_regexp): string { |
| 96 | $parts = preg_split($boundary_regexp, $value); |
| 97 | return (string) array_pop($parts); |
| 98 | }, |
| 99 | ]; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Applies one modifier character to the provided string. |
| 104 | * |
| 105 | * @param string $string |
| 106 | * The value to modify. |
| 107 | * @param string $modifier |
| 108 | * A single modifier character (L, U, F, G, T, S, B, b). |
| 109 | * @param array<string, \Closure> $handlers |
| 110 | * Modifier handlers keyed by modifier character. |
| 111 | * |
| 112 | * @return string |
| 113 | * The modified string, or the original when the modifier is unknown. |
| 114 | */ |
| 115 | private static function applySingleModifier( |
| 116 | string $string, |
| 117 | string $modifier, |
| 118 | array $handlers, |
| 119 | ): string { |
| 120 | if (!isset($handlers[$modifier])) { |
| 121 | return $string; |
| 122 | } |
| 123 | |
| 124 | return $handlers[$modifier]($string); |
| 125 | } |
| 126 | |
| 127 | } |