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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** |
| 6 | * This file is part of fast-forward/dev-tools. |
| 7 | * |
| 8 | * This source file is subject to the license bundled |
| 9 | * with this source code in the file LICENSE. |
| 10 | * |
| 11 | * @copyright Copyright (c) 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/dev-tools |
| 15 | * @see https://github.com/php-fast-forward |
| 16 | * @see https://datatracker.ietf.org/doc/html/rfc2119 |
| 17 | */ |
| 18 | |
| 19 | namespace FastForward\DevTools\License; |
| 20 | |
| 21 | use Safe\Exceptions\JsonException; |
| 22 | use SplFileObject; |
| 23 | |
| 24 | use function Safe\json_decode; |
| 25 | |
| 26 | /** |
| 27 | * Reads composer.json and exposes metadata for license generation. |
| 28 | * |
| 29 | * This class parses a composer.json file via SplFileObject and provides |
| 30 | * methods to extract license information, package name, authors, vendor, |
| 31 | * and the current year for copyright notices. |
| 32 | */ |
| 33 | class Reader implements ReaderInterface |
| 34 | { |
| 35 | private array $data; |
| 36 | |
| 37 | /** |
| 38 | * Creates a new Reader instance. |
| 39 | * |
| 40 | * @param SplFileObject $source The source file to read from, typically composer.json |
| 41 | * |
| 42 | * @throws JsonException if the JSON content is invalid |
| 43 | */ |
| 44 | public function __construct(SplFileObject $source) |
| 45 | { |
| 46 | $this->data = $this->readData($source); |
| 47 | } |
| 48 | |
| 49 | /** |
| 50 | * Reads and parses the JSON content from the source file. |
| 51 | * |
| 52 | * @param SplFileObject $source The source file to read from |
| 53 | * |
| 54 | * @return array The parsed JSON data as an associative array |
| 55 | * |
| 56 | * @throws JsonException if the JSON is invalid |
| 57 | */ |
| 58 | private function readData(SplFileObject $source): array |
| 59 | { |
| 60 | $content = $source->fread($source->getSize()); |
| 61 | |
| 62 | return json_decode($content, true); |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Retrieves the license identifier from composer.json. |
| 67 | * |
| 68 | * If the license is a single string, returns it directly. |
| 69 | * If it's an array with one element, extracts that element. |
| 70 | * Returns null if no license is set or if multiple licenses are specified. |
| 71 | * |
| 72 | * @return string|null the license string, or null if not set or unsupported |
| 73 | */ |
| 74 | public function getLicense(): ?string |
| 75 | { |
| 76 | $license = $this->data['license'] ?? []; |
| 77 | |
| 78 | if (\is_string($license)) { |
| 79 | return $license; |
| 80 | } |
| 81 | |
| 82 | return $this->extractLicense($license); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Retrieves the package name from composer.json. |
| 87 | * |
| 88 | * @return string the full package name (vendor/package), or empty string if not set |
| 89 | */ |
| 90 | public function getPackageName(): string |
| 91 | { |
| 92 | return $this->data['name'] ?? ''; |
| 93 | } |
| 94 | |
| 95 | /** |
| 96 | * Retrieves the list of authors from composer.json. |
| 97 | * |
| 98 | * Each author is normalized to include name, email, homepage, and role fields. |
| 99 | * Returns an empty array if no authors are defined. |
| 100 | * |
| 101 | * @return array<int, array{name: string, email: string, homepage: string, role: string}> |
| 102 | */ |
| 103 | public function getAuthors(): array |
| 104 | { |
| 105 | $authors = $this->data['authors'] ?? []; |
| 106 | |
| 107 | if ([] === $authors) { |
| 108 | return []; |
| 109 | } |
| 110 | |
| 111 | return array_map( |
| 112 | static fn(array $author): array => [ |
| 113 | 'name' => $author['name'] ?? '', |
| 114 | 'email' => $author['email'] ?? '', |
| 115 | 'homepage' => $author['homepage'] ?? '', |
| 116 | 'role' => $author['role'] ?? '', |
| 117 | ], |
| 118 | $authors |
| 119 | ); |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * Extracts the vendor name from the package name. |
| 124 | * |
| 125 | * The package name is expected in vendor/package format. |
| 126 | * Returns null if no package name is set or if the package has no vendor prefix. |
| 127 | * |
| 128 | * @return string|null the vendor name, or null if package has no vendor prefix |
| 129 | */ |
| 130 | public function getVendor(): ?string |
| 131 | { |
| 132 | $packageName = $this->getPackageName(); |
| 133 | |
| 134 | if ('' === $packageName) { |
| 135 | return null; |
| 136 | } |
| 137 | |
| 138 | $parts = explode('/', $packageName, 2); |
| 139 | |
| 140 | if (! isset($parts[1])) { |
| 141 | return null; |
| 142 | } |
| 143 | |
| 144 | return $parts[0]; |
| 145 | } |
| 146 | |
| 147 | /** |
| 148 | * Returns the current year for copyright notices. |
| 149 | * |
| 150 | * @return int the current year as an integer |
| 151 | */ |
| 152 | public function getYear(): int |
| 153 | { |
| 154 | return (int) date('Y'); |
| 155 | } |
| 156 | |
| 157 | /** |
| 158 | * Extracts a single license from an array of licenses. |
| 159 | * |
| 160 | * Returns the first license if exactly one element exists. |
| 161 | * Returns null if the array is empty or contains multiple licenses. |
| 162 | * |
| 163 | * @param array<string> $license The license array to extract from |
| 164 | * |
| 165 | * @return string|null a single license string, or null if extraction is not possible |
| 166 | */ |
| 167 | private function extractLicense(array $license): ?string |
| 168 | { |
| 169 | if ([] === $license) { |
| 170 | return null; |
| 171 | } |
| 172 | |
| 173 | if (1 === \count($license)) { |
| 174 | return $license[0]; |
| 175 | } |
| 176 | |
| 177 | return null; |
| 178 | } |
| 179 | } |