| 1: | <?php |
| 2: | |
| 3: | declare(strict_types=1); |
| 4: | |
| 5: | /** |
| 6: | * This file is part of the Nexus framework. |
| 7: | * |
| 8: | * (c) John Paul E. Balandan, CPA <paulbalandan@gmail.com> |
| 9: | * |
| 10: | * For the full copyright and license information, please view |
| 11: | * the LICENSE file that was distributed with this source code. |
| 12: | */ |
| 13: | |
| 14: | namespace Nexus\Result; |
| 15: | |
| 16: | /** |
| 17: | * @template E |
| 18: | * |
| 19: | * @implements Result<never, E> |
| 20: | */ |
| 21: | final readonly class Err implements Result |
| 22: | { |
| 23: | /** |
| 24: | * @param E $err |
| 25: | */ |
| 26: | public function __construct( |
| 27: | private mixed $err, |
| 28: | ) {} |
| 29: | |
| 30: | public function isOk(): bool |
| 31: | { |
| 32: | return false; |
| 33: | } |
| 34: | |
| 35: | public function isOkAnd(\Closure $predicate): bool |
| 36: | { |
| 37: | return false; |
| 38: | } |
| 39: | |
| 40: | public function isErr(): bool |
| 41: | { |
| 42: | return true; |
| 43: | } |
| 44: | |
| 45: | public function isErrAnd(\Closure $predicate): bool |
| 46: | { |
| 47: | return $predicate($this->err); |
| 48: | } |
| 49: | |
| 50: | /** |
| 51: | * @return self<E> |
| 52: | */ |
| 53: | public function map(\Closure $predicate): self |
| 54: | { |
| 55: | return $this; |
| 56: | } |
| 57: | |
| 58: | public function mapOr(mixed $default, \Closure $predicate): mixed |
| 59: | { |
| 60: | return $default; |
| 61: | } |
| 62: | |
| 63: | public function mapOrElse(\Closure $default, \Closure $predicate): mixed |
| 64: | { |
| 65: | return $default($this->err); |
| 66: | } |
| 67: | |
| 68: | /** |
| 69: | * @template F |
| 70: | * |
| 71: | * @param (\Closure(E): F) $predicate |
| 72: | * |
| 73: | * @return self<F> |
| 74: | */ |
| 75: | public function mapErr(\Closure $predicate): self |
| 76: | { |
| 77: | return new self($predicate($this->err)); |
| 78: | } |
| 79: | |
| 80: | public function unwrap(): never |
| 81: | { |
| 82: | $message = static fn(string $arg): string => \sprintf('Unwrapped an Err result: %s', $arg); |
| 83: | |
| 84: | if ($this->err instanceof \Throwable) { |
| 85: | throw new UnwrappedResultException($message($this->err->getMessage()), 0, $this->err); |
| 86: | } |
| 87: | |
| 88: | if (\is_scalar($this->err)) { |
| 89: | throw new UnwrappedResultException($message(var_export($this->err, true))); |
| 90: | } |
| 91: | |
| 92: | throw new UnwrappedResultException('Unwrapped an Err result.'); |
| 93: | } |
| 94: | |
| 95: | /** |
| 96: | * @template U |
| 97: | * |
| 98: | * @param U $default |
| 99: | * |
| 100: | * @return U |
| 101: | */ |
| 102: | public function unwrapOr(mixed $default): mixed |
| 103: | { |
| 104: | return $default; |
| 105: | } |
| 106: | |
| 107: | /** |
| 108: | * @template U |
| 109: | * |
| 110: | * @param (\Closure(E): U) $op |
| 111: | * |
| 112: | * @return U |
| 113: | */ |
| 114: | public function unwrapOrElse(\Closure $op): mixed |
| 115: | { |
| 116: | return $op($this->err); |
| 117: | } |
| 118: | |
| 119: | public function unwrapErr(): mixed |
| 120: | { |
| 121: | return $this->err; |
| 122: | } |
| 123: | |
| 124: | /** |
| 125: | * @return self<E> |
| 126: | */ |
| 127: | public function and(Result $res): self |
| 128: | { |
| 129: | return $this; |
| 130: | } |
| 131: | |
| 132: | /** |
| 133: | * @return self<E> |
| 134: | */ |
| 135: | public function andThen(\Closure $op): self |
| 136: | { |
| 137: | return $this; |
| 138: | } |
| 139: | |
| 140: | /** |
| 141: | * @template T |
| 142: | * @template F |
| 143: | * @template R of Result<T, F> |
| 144: | * |
| 145: | * @param R $res |
| 146: | * |
| 147: | * @return R |
| 148: | */ |
| 149: | public function or(Result $res): Result |
| 150: | { |
| 151: | return $res; |
| 152: | } |
| 153: | |
| 154: | /** |
| 155: | * @template T |
| 156: | * @template F |
| 157: | * @template R of Result<T, F> |
| 158: | * |
| 159: | * @param (\Closure(E): R) $op |
| 160: | * |
| 161: | * @return R |
| 162: | */ |
| 163: | public function orElse(\Closure $op): Result |
| 164: | { |
| 165: | return $op($this->err); |
| 166: | } |
| 167: | } |
| 168: |