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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** |
| 6 | * Fast Forward Development Tools for PHP projects. |
| 7 | * |
| 8 | * This file is part of fast-forward/dev-tools project. |
| 9 | * |
| 10 | * @author Felipe Sayão Lobato Abreu <github@mentordosnerds.com> |
| 11 | * @license https://opensource.org/licenses/MIT MIT License |
| 12 | * |
| 13 | * @see https://github.com/php-fast-forward/ |
| 14 | * @see https://github.com/php-fast-forward/dev-tools |
| 15 | * @see https://github.com/php-fast-forward/dev-tools/issues |
| 16 | * @see https://php-fast-forward.github.io/dev-tools/ |
| 17 | * @see https://datatracker.ietf.org/doc/html/rfc2119 |
| 18 | */ |
| 19 | |
| 20 | namespace FastForward\DevTools\Rector; |
| 21 | |
| 22 | use Symplify\RuleDocGenerator\ValueObject\CodeSample\CodeSample; |
| 23 | use PhpParser\Comment\Doc; |
| 24 | use PhpParser\Node; |
| 25 | use PhpParser\Node\ComplexType; |
| 26 | use PhpParser\Node\Expr\New_; |
| 27 | use PhpParser\Node\Identifier; |
| 28 | use PhpParser\Node\IntersectionType; |
| 29 | use PhpParser\Node\Name; |
| 30 | use PhpParser\Node\NullableType; |
| 31 | use PhpParser\Node\Stmt\ClassMethod; |
| 32 | use PhpParser\Node\Expr\Throw_; |
| 33 | use PhpParser\Node\UnionType; |
| 34 | use PhpParser\NodeFinder; |
| 35 | use Rector\Rector\AbstractRector; |
| 36 | use Symplify\RuleDocGenerator\ValueObject\RuleDefinition; |
| 37 | |
| 38 | /** |
| 39 | * Executes AST inspections parsing missing documentation on methods automatically. |
| 40 | * It MUST append `@param`, `@return`, and `@throws` tags where deduced accurately. |
| 41 | * The logic SHALL NOT override existing documentation. |
| 42 | */ |
| 43 | class AddMissingMethodPhpDocRector extends AbstractRector |
| 44 | { |
| 45 | /** |
| 46 | * Delivers the formal rule description configured within the Rector ecosystem. |
| 47 | * |
| 48 | * The method MUST accurately describe its functional changes logically. |
| 49 | * |
| 50 | * @return RuleDefinition explains the rule's active behavior context |
| 51 | */ |
| 52 | public function getRuleDefinition(): RuleDefinition |
| 53 | { |
| 54 | return new RuleDefinition('Add basic PHPDoc to methods without docblock', [ |
| 55 | new CodeSample('public function foo() {}', "/**\n * \n */\npublic function foo() {}"), |
| 56 | ]); |
| 57 | } |
| 58 | |
| 59 | /** |
| 60 | * Designates the primary Abstract Syntax Tree (AST) node structures intercepted. |
| 61 | * |
| 62 | * The method MUST register solely `ClassMethod` class references to guarantee precision. |
| 63 | * |
| 64 | * @return array<int, class-string<Node>> the structural bindings applicable for this modification |
| 65 | */ |
| 66 | public function getNodeTypes(): array |
| 67 | { |
| 68 | return [ClassMethod::class]; |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Computes necessary PHPDoc metadata for a given class method selectively. |
| 73 | * |
| 74 | * The method MUST identify the missing `@param`, `@return`, and `@throws` tags algorithmically. |
| 75 | * It SHALL preserve pre-existing valid tags cleanly. If no augmentation is achieved, it returns the node unaltered. |
| 76 | * |
| 77 | * @param Node $node the target method representation parsed synchronously |
| 78 | * |
| 79 | * @return Node the refined active syntax instance inclusive of generated documentation |
| 80 | */ |
| 81 | public function refactor(Node $node): Node |
| 82 | { |
| 83 | if (! $node instanceof ClassMethod) { |
| 84 | return $node; |
| 85 | } |
| 86 | |
| 87 | $docComment = $node->getDocComment(); |
| 88 | |
| 89 | if ($docComment instanceof Doc) { |
| 90 | return $node; |
| 91 | } |
| 92 | |
| 93 | $newTags = []; |
| 94 | foreach ($node->params as $param) { |
| 95 | $paramName = $this->getName($param->var); |
| 96 | |
| 97 | if (null === $paramName) { |
| 98 | continue; |
| 99 | } |
| 100 | |
| 101 | $newTags[] = \sprintf(' * @param %s $%s', $this->resolveTypeToString($param->type), $paramName); |
| 102 | } |
| 103 | |
| 104 | if ('__construct' !== $node->name->toString()) { |
| 105 | if ([] !== $newTags) { |
| 106 | $newTags[] = ' *'; |
| 107 | } |
| 108 | |
| 109 | $newTags[] = \sprintf(' * @return %s', $this->resolveTypeToString($node->returnType)); |
| 110 | } |
| 111 | |
| 112 | foreach ($this->resolveThrows($node) as $exception) { |
| 113 | if ([] !== $newTags) { |
| 114 | $newTags[] = ' *'; |
| 115 | } |
| 116 | |
| 117 | $newTags[] = \sprintf(' * @throws %s', $exception); |
| 118 | } |
| 119 | |
| 120 | if ([] === $newTags) { |
| 121 | return $node; |
| 122 | } |
| 123 | |
| 124 | $docBlock = "/**\n" . implode("\n", $newTags) . "\n */"; |
| 125 | |
| 126 | $node->setDocComment(new Doc($docBlock)); |
| 127 | |
| 128 | return $node; |
| 129 | } |
| 130 | |
| 131 | /** |
| 132 | * Parses the architectural scope of an intercepted method to infer exceptional operations natively. |
| 133 | * |
| 134 | * This method MUST accurately deduce exception creations traversing internal components recursively. |
| 135 | * It SHALL strictly return precise, unique internal naming identifiers safely. |
| 136 | * |
| 137 | * @param ClassMethod $node the active evaluated root target element dynamically instantiated |
| 138 | * |
| 139 | * @return string[] expected failure objects effectively defined within its contextual boundary |
| 140 | */ |
| 141 | private function resolveThrows(ClassMethod $node): array |
| 142 | { |
| 143 | if (null === $node->stmts) { |
| 144 | return []; |
| 145 | } |
| 146 | |
| 147 | $nodeFinder = new NodeFinder(); |
| 148 | |
| 149 | /** @var Throw_[] $throwNodes */ |
| 150 | $throwNodes = $nodeFinder->findInstanceOf($node->stmts, Throw_::class); |
| 151 | |
| 152 | $exceptions = []; |
| 153 | |
| 154 | foreach ($throwNodes as $throwNode) { |
| 155 | $throwExpr = $throwNode->expr; |
| 156 | |
| 157 | if (! $throwExpr instanceof New_) { |
| 158 | continue; |
| 159 | } |
| 160 | |
| 161 | if (! $throwExpr->class instanceof Name) { |
| 162 | continue; |
| 163 | } |
| 164 | |
| 165 | $exceptions[] = $this->resolveNameToString($throwExpr->class); |
| 166 | } |
| 167 | |
| 168 | return array_values(array_unique($exceptions)); |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * Expands Name syntax objects into human-readable string descriptors universally. |
| 173 | * |
| 174 | * The method MUST handle aliases seamlessly or fallback to base names dependably. |
| 175 | * |
| 176 | * @param Name $name the structured reference to parse accurately |
| 177 | * |
| 178 | * @return string the computed class identifier successfully reconstructed |
| 179 | */ |
| 180 | private function resolveNameToString(Name $name): string |
| 181 | { |
| 182 | $originalName = $name->getAttribute('originalName'); |
| 183 | |
| 184 | if ($originalName instanceof Name) { |
| 185 | return $originalName->toString(); |
| 186 | } |
| 187 | |
| 188 | return $name->getLast(); |
| 189 | } |
| 190 | |
| 191 | /** |
| 192 | * Translates complicated type primitives cleanly back into uniform string declarations consistently. |
| 193 | * |
| 194 | * The method MUST parse complex combinations including Intersections, Unions natively and securely. |
| 195 | * |
| 196 | * @param string|Identifier|Name|ComplexType|null $type the original metadata instance safely captured |
| 197 | * |
| 198 | * @return string the final interpreted designation string explicitly represented safely |
| 199 | */ |
| 200 | private function resolveTypeToString(string|Identifier|Name|ComplexType|null $type): string |
| 201 | { |
| 202 | if (null === $type) { |
| 203 | return 'mixed'; |
| 204 | } |
| 205 | |
| 206 | if (\is_string($type)) { |
| 207 | return $type; |
| 208 | } |
| 209 | |
| 210 | if ($type instanceof Identifier) { |
| 211 | return $type->toString(); |
| 212 | } |
| 213 | |
| 214 | if ($type instanceof Name) { |
| 215 | $originalName = $type->getAttribute('originalName'); |
| 216 | |
| 217 | if ($originalName instanceof Name) { |
| 218 | return $originalName->toString(); |
| 219 | } |
| 220 | |
| 221 | return $type->toString(); |
| 222 | } |
| 223 | |
| 224 | if ($type instanceof NullableType) { |
| 225 | return $this->resolveTypeToString($type->type) . '|null'; |
| 226 | } |
| 227 | |
| 228 | if ($type instanceof UnionType) { |
| 229 | return implode('|', array_map($this->resolveTypeToString(...), $type->types)); |
| 230 | } |
| 231 | |
| 232 | if ($type instanceof IntersectionType) { |
| 233 | return implode('&', array_map($this->resolveTypeToString(...), $type->types)); |
| 234 | } |
| 235 | |
| 236 | return 'mixed'; |
| 237 | } |
| 238 | } |