marc-mabe /
php-enum
| Total Complexity | 49 |
| Total Lines | 419 |
| Duplicated Lines | 0 % |
| Coverage | 100% |
| Changes | 9 | ||
| Bugs | 1 | Features | 0 |
Complex classes like Enum often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use Enum, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
||
| 18 | abstract class Enum |
||
| 19 | { |
||
| 20 | /** |
||
| 21 | * The selected enumerator value |
||
| 22 | * |
||
| 23 | * @var null|bool|int|float|string|mixed[] |
||
| 24 | */ |
||
| 25 | private $value; |
||
|
Coding Style
introduced
by
|
|||
| 26 | |||
| 27 | /** |
||
| 28 | * The ordinal number of the enumerator |
||
| 29 | * |
||
| 30 | * @var null|int |
||
| 31 | */ |
||
| 32 | private $ordinal; |
||
| 33 | |||
| 34 | /** |
||
| 35 | * A map of enumerator names and values by enumeration class |
||
| 36 | * |
||
| 37 | * @var array<class-string<Enum>, array<string, null|bool|int|float|string|mixed[]>> |
||
| 38 | */ |
||
| 39 | private static $constants = []; |
||
| 40 | |||
| 41 | /** |
||
| 42 | * A List of available enumerator names by enumeration class |
||
| 43 | * |
||
| 44 | * @var array<class-string<Enum>, string[]> |
||
| 45 | */ |
||
| 46 | private static $names = []; |
||
| 47 | |||
| 48 | /** |
||
| 49 | * A map of enumerator names and instances by enumeration class |
||
| 50 | * |
||
| 51 | * @var array<class-string<Enum>, array<string, Enum>> |
||
| 52 | */ |
||
| 53 | private static $instances = []; |
||
| 54 | |||
| 55 | /** |
||
| 56 | * Constructor |
||
| 57 | * |
||
| 58 | * @param null|bool|int|float|string|mixed[] $value The value of the enumerator |
||
| 59 | * @param int|null $ordinal The ordinal number of the enumerator |
||
| 60 | */ |
||
| 61 | 45 | final private function __construct($value, $ordinal = null) |
|
| 62 | { |
||
| 63 | 45 | $this->value = $value; |
|
| 64 | 45 | $this->ordinal = $ordinal; |
|
| 65 | 45 | } |
|
| 66 | |||
| 67 | /** |
||
| 68 | * Get the name of the enumerator |
||
| 69 | * |
||
| 70 | * @return string |
||
| 71 | * @see getName() |
||
| 72 | */ |
||
| 73 | 1 | public function __toString(): string |
|
| 76 | } |
||
| 77 | |||
| 78 | /** |
||
| 79 | * @throws LogicException Enums are not cloneable |
||
| 80 | * because instances are implemented as singletons |
||
| 81 | */ |
||
| 82 | 1 | final private function __clone() |
|
| 83 | { |
||
| 84 | 1 | throw new LogicException('Enums are not cloneable'); |
|
| 85 | } |
||
| 86 | |||
| 87 | /** |
||
| 88 | * @throws LogicException Enums are not serializable |
||
| 89 | * because instances are implemented as singletons |
||
| 90 | */ |
||
| 91 | 1 | final public function __sleep() |
|
| 94 | } |
||
| 95 | |||
| 96 | /** |
||
| 97 | * @throws LogicException Enums are not serializable |
||
| 98 | * because instances are implemented as singletons |
||
| 99 | */ |
||
| 100 | 1 | final public function __wakeup() |
|
| 101 | { |
||
| 102 | 1 | throw new LogicException('Enums are not serializable'); |
|
| 103 | } |
||
| 104 | |||
| 105 | /** |
||
| 106 | * Get the value of the enumerator |
||
| 107 | * |
||
| 108 | * @return null|bool|int|float|string|mixed[] |
||
| 109 | */ |
||
| 110 | 32 | final public function getValue() |
|
| 113 | } |
||
| 114 | |||
| 115 | /** |
||
| 116 | * Get the name of the enumerator |
||
| 117 | * |
||
| 118 | * @return string |
||
| 119 | */ |
||
| 120 | 8 | final public function getName() |
|
| 121 | { |
||
| 122 | 8 | return self::$names[static::class][$this->ordinal ?? $this->getOrdinal()]; |
|
| 123 | } |
||
| 124 | |||
| 125 | /** |
||
| 126 | * Get the ordinal number of the enumerator |
||
| 127 | * |
||
| 128 | * @return int |
||
| 129 | */ |
||
| 130 | 109 | final public function getOrdinal() |
|
| 131 | { |
||
| 132 | 109 | if ($this->ordinal === null) { |
|
| 133 | 22 | $ordinal = 0; |
|
| 134 | 22 | $value = $this->value; |
|
| 135 | 22 | $constants = self::$constants[static::class] ?? static::getConstants(); |
|
| 136 | 22 | foreach ($constants as $constValue) { |
|
| 137 | 22 | if ($value === $constValue) { |
|
| 138 | 22 | break; |
|
| 139 | } |
||
| 140 | 17 | ++$ordinal; |
|
| 141 | } |
||
| 142 | |||
| 143 | 22 | $this->ordinal = $ordinal; |
|
| 144 | } |
||
| 145 | |||
| 146 | 109 | return $this->ordinal; |
|
| 147 | } |
||
| 148 | |||
| 149 | /** |
||
| 150 | * Compare this enumerator against another and check if it's the same. |
||
| 151 | * |
||
| 152 | * @param static|null|bool|int|float|string|mixed[] $enumerator An enumerator object or value |
||
| 153 | * @return bool |
||
| 154 | */ |
||
| 155 | 2 | final public function is($enumerator) |
|
| 156 | { |
||
| 157 | 2 | return $this === $enumerator || $this->value === $enumerator |
|
| 158 | |||
| 159 | // The following additional conditions are required only because of the issue of serializable singletons |
||
| 160 | 2 | || ($enumerator instanceof static |
|
| 161 | 2 | && \get_class($enumerator) === static::class |
|
| 162 | 2 | && $enumerator->value === $this->value |
|
| 163 | ); |
||
| 164 | } |
||
| 165 | |||
| 166 | /** |
||
| 167 | * Get an enumerator instance of the given enumerator value or instance |
||
| 168 | * |
||
| 169 | * @param static|null|bool|int|float|string|mixed[] $enumerator An enumerator object or value |
||
| 170 | * @return static |
||
| 171 | * @throws InvalidArgumentException On an unknown or invalid value |
||
| 172 | * @throws LogicException On ambiguous constant values |
||
| 173 | */ |
||
| 174 | 120 | final public static function get($enumerator) |
|
| 175 | { |
||
| 176 | 120 | if ($enumerator instanceof static) { |
|
| 177 | 39 | if (\get_class($enumerator) !== static::class) { |
|
| 178 | 4 | throw new InvalidArgumentException(sprintf( |
|
| 179 | 4 | 'Invalid value of type %s for enumeration %s', |
|
| 180 | 4 | \get_class($enumerator), |
|
| 181 | 4 | static::class |
|
| 182 | )); |
||
| 183 | } |
||
| 184 | |||
| 185 | 35 | return $enumerator; |
|
| 186 | } |
||
| 187 | |||
| 188 | 93 | return static::byValue($enumerator); |
|
| 189 | } |
||
| 190 | |||
| 191 | /** |
||
| 192 | * Get an enumerator instance by the given value |
||
| 193 | * |
||
| 194 | * @param null|bool|int|float|string|mixed[] $value Enumerator value |
||
| 195 | * @return static |
||
| 196 | * @throws InvalidArgumentException On an unknown or invalid value |
||
| 197 | * @throws LogicException On ambiguous constant values |
||
| 198 | */ |
||
| 199 | 93 | final public static function byValue($value) |
|
| 200 | { |
||
| 201 | /** @var mixed $value */ |
||
| 202 | |||
| 203 | 93 | $constants = self::$constants[static::class] ?? static::getConstants(); |
|
| 204 | |||
| 205 | 91 | $name = \array_search($value, $constants, true); |
|
| 206 | 91 | if ($name === false) { |
|
| 207 | 9 | throw new InvalidArgumentException(sprintf( |
|
| 208 | 9 | 'Unknown value %s for enumeration %s', |
|
| 209 | 9 | \is_scalar($value) |
|
| 210 | 7 | ? \var_export($value, true) |
|
| 211 | 9 | : 'of type ' . (\is_object($value) ? \get_class($value) : \gettype($value)), |
|
| 212 | 9 | static::class |
|
| 213 | )); |
||
| 214 | } |
||
| 215 | |||
| 216 | /** @var static $instance */ |
||
| 217 | 84 | $instance = self::$instances[static::class][$name] |
|
| 218 | 84 | ?? self::$instances[static::class][$name] = new static($constants[$name]); |
|
| 219 | |||
| 220 | 84 | return $instance; |
|
| 221 | } |
||
| 222 | |||
| 223 | /** |
||
| 224 | * Get an enumerator instance by the given name |
||
| 225 | * |
||
| 226 | * @param string $name The name of the enumerator |
||
| 227 | * @return static |
||
| 228 | * @throws InvalidArgumentException On an invalid or unknown name |
||
| 229 | * @throws LogicException On ambiguous values |
||
| 230 | */ |
||
| 231 | 59 | final public static function byName(string $name) |
|
| 232 | { |
||
| 233 | 59 | if (isset(self::$instances[static::class][$name])) { |
|
| 234 | /** @var static $instance */ |
||
| 235 | 44 | $instance = self::$instances[static::class][$name]; |
|
| 236 | 44 | return $instance; |
|
| 237 | } |
||
| 238 | |||
| 239 | 19 | $const = static::class . "::{$name}"; |
|
| 240 | 19 | if (!\defined($const)) { |
|
| 241 | 1 | throw new InvalidArgumentException("{$const} not defined"); |
|
| 242 | } |
||
| 243 | |||
| 244 | 18 | assert( |
|
| 245 | 18 | self::noAmbiguousValues(static::getConstants()), |
|
| 246 | 17 | 'Ambiguous enumerator values detected for ' . static::class |
|
| 247 | ); |
||
| 248 | |||
| 249 | 17 | return self::$instances[static::class][$name] = new static(\constant($const)); |
|
| 250 | } |
||
| 251 | |||
| 252 | /** |
||
| 253 | * Get an enumeration instance by the given ordinal number |
||
| 254 | * |
||
| 255 | * @param int $ordinal The ordinal number of the enumerator |
||
| 256 | * @return static |
||
| 257 | * @throws InvalidArgumentException On an invalid ordinal number |
||
| 258 | * @throws LogicException On ambiguous values |
||
| 259 | */ |
||
| 260 | 39 | final public static function byOrdinal(int $ordinal) |
|
| 261 | { |
||
| 262 | 39 | $constants = self::$constants[static::class] ?? static::getConstants(); |
|
| 263 | |||
| 264 | 39 | if (!isset(self::$names[static::class][$ordinal])) { |
|
| 265 | 1 | throw new InvalidArgumentException(\sprintf( |
|
| 266 | 1 | 'Invalid ordinal number %s, must between 0 and %s', |
|
| 267 | 1 | $ordinal, |
|
| 268 | 1 | \count(self::$names[static::class]) - 1 |
|
| 269 | )); |
||
| 270 | } |
||
| 271 | |||
| 272 | 38 | $name = self::$names[static::class][$ordinal]; |
|
| 273 | |||
| 274 | /** @var static $instance */ |
||
| 275 | 38 | $instance = self::$instances[static::class][$name] |
|
| 276 | 38 | ?? self::$instances[static::class][$name] = new static($constants[$name], $ordinal); |
|
| 277 | |||
| 278 | 38 | return $instance; |
|
| 279 | } |
||
| 280 | |||
| 281 | /** |
||
| 282 | * Get a list of enumerator instances ordered by ordinal number |
||
| 283 | * |
||
| 284 | * @return static[] |
||
| 285 | */ |
||
| 286 | 17 | final public static function getEnumerators() |
|
| 287 | { |
||
| 288 | 17 | if (!isset(self::$names[static::class])) { |
|
| 289 | 1 | static::getConstants(); |
|
| 290 | } |
||
| 291 | |||
| 292 | /** @var callable $byNameFn */ |
||
| 293 | 17 | $byNameFn = [static::class, 'byName']; |
|
| 294 | |||
| 295 | 17 | return \array_map($byNameFn, self::$names[static::class]); |
|
| 296 | } |
||
| 297 | |||
| 298 | /** |
||
| 299 | * Get a list of enumerator values ordered by ordinal number |
||
| 300 | * |
||
| 301 | * @return array<null|bool|int|float|string|mixed[]> |
||
| 302 | */ |
||
| 303 | 7 | final public static function getValues() |
|
| 304 | { |
||
| 305 | 7 | return \array_values(self::$constants[static::class] ?? static::getConstants()); |
|
| 306 | } |
||
| 307 | |||
| 308 | /** |
||
| 309 | * Get a list of enumerator names ordered by ordinal number |
||
| 310 | * |
||
| 311 | * @return string[] |
||
| 312 | */ |
||
| 313 | 3 | final public static function getNames() |
|
| 314 | { |
||
| 315 | 3 | if (!isset(self::$names[static::class])) { |
|
| 316 | 1 | static::getConstants(); |
|
| 317 | } |
||
| 318 | 3 | return self::$names[static::class]; |
|
| 319 | } |
||
| 320 | |||
| 321 | /** |
||
| 322 | * Get a list of enumerator ordinal numbers |
||
| 323 | * |
||
| 324 | * @return int[] |
||
| 325 | */ |
||
| 326 | 1 | final public static function getOrdinals() |
|
| 327 | { |
||
| 328 | 1 | $count = \count(self::$constants[static::class] ?? static::getConstants()); |
|
| 329 | 1 | return $count ? \range(0, $count - 1) : []; |
|
| 330 | } |
||
| 331 | |||
| 332 | /** |
||
| 333 | * Get all available constants of the called class |
||
| 334 | * |
||
| 335 | * @return array<string, null|bool|int|float|string|mixed[]> |
||
| 336 | * @throws LogicException On ambiguous constant values |
||
| 337 | */ |
||
| 338 | 152 | final public static function getConstants() |
|
| 339 | { |
||
| 340 | 152 | if (isset(self::$constants[static::class])) { |
|
| 341 | 116 | return self::$constants[static::class]; |
|
| 342 | } |
||
| 343 | |||
| 344 | 51 | $reflection = new ReflectionClass(static::class); |
|
| 345 | 51 | $constants = []; |
|
| 346 | |||
| 347 | do { |
||
| 348 | 51 | $scopeConstants = []; |
|
| 349 | // Enumerators must be defined as public class constants |
||
| 350 | 51 | foreach ($reflection->getReflectionConstants() as $reflConstant) { |
|
| 351 | 50 | if ($reflConstant->isPublic()) { |
|
| 352 | 50 | $scopeConstants[ $reflConstant->getName() ] = $reflConstant->getValue(); |
|
| 353 | } |
||
| 354 | } |
||
| 355 | |||
| 356 | 51 | $constants = $scopeConstants + $constants; |
|
| 357 | 51 | } while (($reflection = $reflection->getParentClass()) && $reflection->name !== __CLASS__); |
|
| 358 | |||
| 359 | 51 | assert( |
|
| 360 | 51 | self::noAmbiguousValues($constants), |
|
| 361 | 51 | 'Ambiguous enumerator values detected for ' . static::class |
|
| 362 | ); |
||
| 363 | |||
| 364 | 48 | self::$names[static::class] = \array_keys($constants); |
|
| 365 | 48 | return self::$constants[static::class] = $constants; |
|
| 366 | } |
||
| 367 | |||
| 368 | /** |
||
| 369 | * Test that the given constants does not contain ambiguous values |
||
| 370 | * @param array<string, null|bool|int|float|string|mixed[]> $constants |
||
| 371 | * @return bool |
||
| 372 | */ |
||
| 373 | 53 | private static function noAmbiguousValues($constants) |
|
| 374 | { |
||
| 375 | 53 | foreach ($constants as $value) { |
|
| 376 | 52 | $names = \array_keys($constants, $value, true); |
|
| 377 | 52 | if (\count($names) > 1) { |
|
| 378 | 5 | return false; |
|
| 379 | } |
||
| 380 | } |
||
| 381 | |||
| 382 | 48 | return true; |
|
| 383 | } |
||
| 384 | |||
| 385 | /** |
||
| 386 | * Test if the given enumerator is part of this enumeration |
||
| 387 | * |
||
| 388 | * @param static|null|bool|int|float|string|mixed[] $enumerator |
||
| 389 | * @return bool |
||
| 390 | */ |
||
| 391 | 1 | final public static function has($enumerator) |
|
| 392 | { |
||
| 393 | 1 | if ($enumerator instanceof static) { |
|
| 394 | 1 | return \get_class($enumerator) === static::class; |
|
| 395 | } |
||
| 396 | |||
| 397 | 1 | return static::hasValue($enumerator); |
|
| 398 | } |
||
| 399 | |||
| 400 | /** |
||
| 401 | * Test if the given enumerator value is part of this enumeration |
||
| 402 | * |
||
| 403 | * @param null|bool|int|float|string|mixed[] $value |
||
| 404 | * @return bool |
||
| 405 | */ |
||
| 406 | 2 | final public static function hasValue($value) |
|
| 407 | { |
||
| 408 | 2 | return \in_array($value, self::$constants[static::class] ?? static::getConstants(), true); |
|
| 409 | } |
||
| 410 | |||
| 411 | /** |
||
| 412 | * Test if the given enumerator name is part of this enumeration |
||
| 413 | * |
||
| 414 | * @param string $name |
||
| 415 | * @return bool |
||
| 416 | */ |
||
| 417 | 1 | final public static function hasName(string $name) |
|
| 418 | { |
||
| 419 | 1 | return \defined("static::{$name}"); |
|
| 420 | } |
||
| 421 | |||
| 422 | /** |
||
| 423 | * Get an enumerator instance by the given name. |
||
| 424 | * |
||
| 425 | * This will be called automatically on calling a method |
||
| 426 | * with the same name of a defined enumerator. |
||
| 427 | * |
||
| 428 | * @param string $method The name of the enumerator (called as method) |
||
| 429 | * @param array<mixed> $args There should be no arguments |
||
| 430 | * @return static |
||
| 431 | * @throws InvalidArgumentException On an invalid or unknown name |
||
| 432 | * @throws LogicException On ambiguous constant values |
||
| 433 | */ |
||
| 434 | 39 | final public static function __callStatic(string $method, array $args) |
|
| 437 | } |
||
| 438 | } |
||
| 439 |
Loading history...
