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| 1 | <?php |
| 2 | declare(strict_types=1); |
| 3 | /** |
| 4 | * Pop PHP Framework (https://www.popphp.org/) |
| 5 | * |
| 6 | * @link https://github.com/popphp/popphp-framework |
| 7 | * @author Nick Sagona, III <dev@noladev.com> |
| 8 | * @copyright Copyright (c) 2009-2027 NOLA Interactive, LLC. |
| 9 | * @license https://www.popphp.org/license New BSD License |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * @namespace |
| 14 | */ |
| 15 | namespace Pop\Code\Generator; |
| 16 | |
| 17 | /** |
| 18 | * Enum generator class |
| 19 | * |
| 20 | * @category Pop |
| 21 | * @package Pop\Code |
| 22 | * @author Nick Sagona, III <dev@noladev.com> |
| 23 | * @copyright Copyright (c) 2009-2027 NOLA Interactive, LLC. |
| 24 | * @license https://www.popphp.org/license New BSD License |
| 25 | * @version 6.0.0 |
| 26 | */ |
| 27 | class EnumGenerator extends AbstractClassGenerator |
| 28 | { |
| 29 | |
| 30 | use Traits\UseTrait; |
| 31 | |
| 32 | /** |
| 33 | * Backing type (null for a pure enum, otherwise 'int' or 'string') |
| 34 | * @var ?string |
| 35 | */ |
| 36 | protected ?string $backingType = null; |
| 37 | |
| 38 | /** |
| 39 | * Interfaces that are implemented |
| 40 | * @var array |
| 41 | */ |
| 42 | protected array $interfaces = []; |
| 43 | |
| 44 | /** |
| 45 | * Array of enum case generator objects |
| 46 | * @var array |
| 47 | */ |
| 48 | protected array $cases = []; |
| 49 | |
| 50 | /** |
| 51 | * Constructor |
| 52 | * |
| 53 | * Instantiate the enum generator object |
| 54 | * |
| 55 | * @param string $name |
| 56 | * @param ?string $backingType |
| 57 | * @param mixed $interface |
| 58 | */ |
| 59 | public function __construct(string $name, ?string $backingType = null, mixed $interface = null) |
| 60 | { |
| 61 | $this->setName($name); |
| 62 | |
| 63 | if ($backingType !== null) { |
| 64 | $this->setBackingType($backingType); |
| 65 | } |
| 66 | |
| 67 | if ($interface !== null) { |
| 68 | if (is_array($interface)) { |
| 69 | $this->addInterfaces($interface); |
| 70 | } else if (str_contains($interface, ',')) { |
| 71 | $this->addInterfaces(array_map('trim', explode(',', $interface))); |
| 72 | } else { |
| 73 | $this->addInterface($interface); |
| 74 | } |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Set the backing type |
| 80 | * |
| 81 | * @param ?string $backingType |
| 82 | * @return EnumGenerator |
| 83 | */ |
| 84 | public function setBackingType(?string $backingType = null): EnumGenerator |
| 85 | { |
| 86 | $this->backingType = $backingType; |
| 87 | return $this; |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Get the backing type |
| 92 | * |
| 93 | * @return string|null |
| 94 | */ |
| 95 | public function getBackingType(): string|null |
| 96 | { |
| 97 | return $this->backingType; |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * Has backing type |
| 102 | * |
| 103 | * @return bool |
| 104 | */ |
| 105 | public function hasBackingType(): bool |
| 106 | { |
| 107 | return ($this->backingType !== null); |
| 108 | } |
| 109 | |
| 110 | /** |
| 111 | * Add an interface |
| 112 | * |
| 113 | * @param string $interface |
| 114 | * @return EnumGenerator |
| 115 | */ |
| 116 | public function addInterface(string $interface): EnumGenerator |
| 117 | { |
| 118 | if (!in_array($interface, $this->interfaces)) { |
| 119 | $this->interfaces[] = $interface; |
| 120 | } |
| 121 | |
| 122 | return $this; |
| 123 | } |
| 124 | |
| 125 | /** |
| 126 | * Add interfaces |
| 127 | * |
| 128 | * @param array $interfaces |
| 129 | * @return EnumGenerator |
| 130 | */ |
| 131 | public function addInterfaces(array $interfaces): EnumGenerator |
| 132 | { |
| 133 | foreach ($interfaces as $interface) { |
| 134 | $this->addInterface($interface); |
| 135 | } |
| 136 | |
| 137 | return $this; |
| 138 | } |
| 139 | |
| 140 | /** |
| 141 | * Get the interfaces |
| 142 | * |
| 143 | * @return array |
| 144 | */ |
| 145 | public function getInterfaces(): array |
| 146 | { |
| 147 | return $this->interfaces; |
| 148 | } |
| 149 | |
| 150 | /** |
| 151 | * Has interfaces |
| 152 | * |
| 153 | * @return bool |
| 154 | */ |
| 155 | public function hasInterfaces(): bool |
| 156 | { |
| 157 | return (!empty($this->interfaces)); |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * Has interface |
| 162 | * |
| 163 | * @param string $interface |
| 164 | * @return bool |
| 165 | */ |
| 166 | public function hasInterface(string $interface): bool |
| 167 | { |
| 168 | return (in_array($interface, $this->interfaces)); |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * Remove interface |
| 173 | * |
| 174 | * @param string $interface |
| 175 | * @return EnumGenerator |
| 176 | */ |
| 177 | public function removeInterface(string $interface): EnumGenerator |
| 178 | { |
| 179 | if (in_array($interface, $this->interfaces)) { |
| 180 | $key = array_search($interface, $this->interfaces); |
| 181 | unset($this->interfaces[$key]); |
| 182 | } |
| 183 | |
| 184 | return $this; |
| 185 | } |
| 186 | |
| 187 | /** |
| 188 | * Add cases |
| 189 | * |
| 190 | * @param array $cases |
| 191 | * @return EnumGenerator |
| 192 | */ |
| 193 | public function addCases(array $cases): EnumGenerator |
| 194 | { |
| 195 | foreach ($cases as $case) { |
| 196 | $this->addCase($case); |
| 197 | } |
| 198 | return $this; |
| 199 | } |
| 200 | |
| 201 | /** |
| 202 | * Add a case |
| 203 | * |
| 204 | * @param EnumCaseGenerator $case |
| 205 | * @return EnumGenerator |
| 206 | */ |
| 207 | public function addCase(EnumCaseGenerator $case): EnumGenerator |
| 208 | { |
| 209 | $this->cases[$case->getName()] = $case; |
| 210 | return $this; |
| 211 | } |
| 212 | |
| 213 | /** |
| 214 | * Get a case |
| 215 | * |
| 216 | * @param mixed $case |
| 217 | * @return EnumCaseGenerator|null |
| 218 | */ |
| 219 | public function getCase(mixed $case): EnumCaseGenerator|null |
| 220 | { |
| 221 | $c = ($case instanceof EnumCaseGenerator) ? $case->getName() : $case; |
| 222 | return (isset($this->cases[$c])) ? $this->cases[$c] : null; |
| 223 | } |
| 224 | |
| 225 | /** |
| 226 | * Has a case |
| 227 | * |
| 228 | * @param mixed $case |
| 229 | * @return bool |
| 230 | */ |
| 231 | public function hasCase(mixed $case): bool |
| 232 | { |
| 233 | $c = ($case instanceof EnumCaseGenerator) ? $case->getName() : $case; |
| 234 | return (isset($this->cases[$c])); |
| 235 | } |
| 236 | |
| 237 | /** |
| 238 | * Has cases |
| 239 | * |
| 240 | * @return bool |
| 241 | */ |
| 242 | public function hasCases(): bool |
| 243 | { |
| 244 | return (!empty($this->cases)); |
| 245 | } |
| 246 | |
| 247 | /** |
| 248 | * Get all cases |
| 249 | * |
| 250 | * @return array |
| 251 | */ |
| 252 | public function getCases(): array |
| 253 | { |
| 254 | return $this->cases; |
| 255 | } |
| 256 | |
| 257 | /** |
| 258 | * Remove a case |
| 259 | * |
| 260 | * @param mixed $case |
| 261 | * @return EnumGenerator |
| 262 | */ |
| 263 | public function removeCase(mixed $case): EnumGenerator |
| 264 | { |
| 265 | $c = ($case instanceof EnumCaseGenerator) ? $case->getName() : $case; |
| 266 | if (isset($this->cases[$c])) { |
| 267 | unset($this->cases[$c]); |
| 268 | } |
| 269 | return $this; |
| 270 | } |
| 271 | |
| 272 | /** |
| 273 | * Add a method (overridden to reject a constructor, which enums cannot declare) |
| 274 | * |
| 275 | * @param MethodGenerator $method |
| 276 | * @throws Exception |
| 277 | * @return EnumGenerator |
| 278 | */ |
| 279 | public function addMethod(MethodGenerator $method): EnumGenerator |
| 280 | { |
| 281 | if (strtolower($method->getName()) === '__construct') { |
| 282 | throw new Exception('Error: Enums cannot declare a constructor.'); |
| 283 | } |
| 284 | parent::addMethod($method); |
| 285 | return $this; |
| 286 | } |
| 287 | |
| 288 | /** |
| 289 | * Render enum |
| 290 | * |
| 291 | * @throws Exception |
| 292 | * @return string |
| 293 | */ |
| 294 | public function render(): string |
| 295 | { |
| 296 | foreach ($this->cases as $case) { |
| 297 | if ($this->hasBackingType() && !$case->hasValue()) { |
| 298 | throw new Exception("Error: Case '" . $case->getName() . "' of a backed enum must have a value."); |
| 299 | } |
| 300 | if (!$this->hasBackingType() && $case->hasValue()) { |
| 301 | throw new Exception("Error: Case '" . $case->getName() . "' of a non-backed enum must not have a value."); |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | $this->output = ($this->namespace !== null) ? $this->namespace->render() . PHP_EOL : null; |
| 306 | $this->output .= ($this->docblock !== null) ? $this->docblock->render() : null; |
| 307 | $this->output .= $this->formatAttributes(false); |
| 308 | $this->output .= 'enum ' . $this->name; |
| 309 | |
| 310 | if ($this->backingType !== null) { |
| 311 | $this->output .= ': ' . $this->backingType; |
| 312 | } |
| 313 | if (!empty($this->interfaces)) { |
| 314 | $this->output .= ' implements ' . implode(', ', $this->interfaces); |
| 315 | } |
| 316 | |
| 317 | $this->output .= PHP_EOL . '{' . PHP_EOL; |
| 318 | |
| 319 | if ($this->hasUses()) { |
| 320 | $this->output .= PHP_EOL; |
| 321 | foreach ($this->uses as $ns => $as) { |
| 322 | // Unlike a namespace-level `use Foo\Bar as Baz;` import, a trait-use inside a |
| 323 | // class-like body has no whole-trait aliasing syntax -- `use SomeTrait as Alias;` |
| 324 | // here is not valid PHP (only per-method conflict resolution, `use A, B { A::m as |
| 325 | // n; }`, exists, and this simple $ns => $as map has no way to represent that). Any |
| 326 | // alias is therefore intentionally ignored when rendering a trait-use. |
| 327 | $this->output .= $this->printIndent() . 'use ' . $ns . ';' . PHP_EOL; |
| 328 | } |
| 329 | } |
| 330 | |
| 331 | if ($this->hasCases()) { |
| 332 | $this->output .= $this->formatCases(); |
| 333 | } |
| 334 | if ($this->hasConstants()) { |
| 335 | $this->output .= $this->formatConstants(); |
| 336 | } |
| 337 | if ($this->hasMethods()) { |
| 338 | $this->output .= $this->formatMethods(); |
| 339 | } |
| 340 | |
| 341 | $this->output .= PHP_EOL . '}' . PHP_EOL; |
| 342 | |
| 343 | return $this->output; |
| 344 | } |
| 345 | |
| 346 | /** |
| 347 | * Format the cases |
| 348 | * |
| 349 | * @return string |
| 350 | */ |
| 351 | protected function formatCases(): string |
| 352 | { |
| 353 | $cases = null; |
| 354 | |
| 355 | foreach ($this->cases as $case) { |
| 356 | $cases .= $case->render() . PHP_EOL; |
| 357 | } |
| 358 | |
| 359 | return $cases; |
| 360 | } |
| 361 | |
| 362 | /** |
| 363 | * Format the constants |
| 364 | * |
| 365 | * @return string |
| 366 | */ |
| 367 | protected function formatConstants(): string |
| 368 | { |
| 369 | $constants = null; |
| 370 | |
| 371 | foreach ($this->constants as $constant) { |
| 372 | $constants .= $constant->render() . PHP_EOL; |
| 373 | } |
| 374 | |
| 375 | return $constants; |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * Format the methods |
| 380 | * |
| 381 | * @return string |
| 382 | */ |
| 383 | protected function formatMethods(): string |
| 384 | { |
| 385 | $methods = null; |
| 386 | |
| 387 | foreach ($this->methods as $method) { |
| 388 | $methods .= $method->render() . PHP_EOL; |
| 389 | } |
| 390 | |
| 391 | return $methods; |
| 392 | } |
| 393 | |
| 394 | /** |
| 395 | * Print enum |
| 396 | * |
| 397 | * @return string |
| 398 | */ |
| 399 | public function __toString(): string |
| 400 | { |
| 401 | return $this->render(); |
| 402 | } |
| 403 | |
| 404 | } |