Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
Complex classes like Query 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. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
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 Query, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 47 | class Query |
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| 48 | { |
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| 49 | /** @var string */ |
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| 50 | private $userId; |
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| 51 | /** @var string */ |
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| 52 | private $query; |
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| 53 | /** @var int */ |
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| 54 | private $skip = 0; |
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| 55 | /** @var int */ |
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| 56 | private $pageSize = 10; |
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| 57 | /** @var string */ |
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| 58 | private $collection; |
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| 59 | /** @var string */ |
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| 60 | private $area; |
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| 61 | /** @var string */ |
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| 62 | private $biasingProfile; |
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| 63 | /** @var string */ |
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| 64 | private $language; |
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| 65 | /** @var MSort[] */ |
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| 66 | private $sort; |
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| 67 | /** @var CustomUrlParam[] */ |
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| 68 | private $customUrlParams = array(); |
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| 69 | /** @var Navigation[] */ |
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| 70 | private $navigations = array(); |
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| 71 | /** @var string[] */ |
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| 72 | private $includedNavigations = array(); |
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| 73 | /** @var string[] */ |
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| 74 | private $excludedNavigations = array(); |
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| 75 | /** @var string[] */ |
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| 76 | private $fields = array(); |
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| 77 | /** @var string[] */ |
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| 78 | private $orFields = array(); |
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| 79 | /** @var bool */ |
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| 80 | private $pruneRefinements = true; |
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| 81 | /** @var bool */ |
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| 82 | private $disableAutocorrection = false; |
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| 83 | /** @var bool */ |
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| 84 | private $wildcardSearchEnabled = false; |
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| 85 | // Removed until CBOR support for serialization / de-serialization improves |
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| 86 | // /** @var bool */ |
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| 87 | // private $returnBinary = false; |
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| 88 | /** @var RestrictNavigation */ |
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| 89 | private $restrictNavigation; |
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| 90 | /** @var MBiasing */ |
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| 91 | private $biasing; |
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| 92 | /** @var MMatchStrategy */ |
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| 93 | private $matchStrategy; |
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| 94 | |||
| 95 | /** @var Serializer */ |
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| 96 | private $serializer; |
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| 97 | |||
| 98 | const TILDE_REGEX = "/~((?=[\\w]*[=:]))/"; |
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| 99 | |||
| 100 | /** |
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| 101 | * @param mixed $request |
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| 102 | * |
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| 103 | * @return string |
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| 104 | */ |
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| 105 | private function requestToJson($request) |
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| 116 | |||
| 117 | /** |
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| 118 | * @param string $clientKey Your client key. |
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| 119 | * |
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| 120 | * @return string JSON representation of request to Bridge. |
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| 121 | */ |
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| 122 | public function getBridgeJson($clientKey) |
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| 127 | |||
| 128 | /** |
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| 129 | * @param string $clientKey Your client key. |
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| 130 | * @param string $navigationName Name of the navigation to get refinements for |
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| 131 | * |
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| 132 | * @return string JSON representation of request to Bridge. |
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| 133 | */ |
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| 134 | public function getBridgeRefinementsJson($clientKey, $navigationName) |
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| 141 | |||
| 142 | /** |
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| 143 | * @param string $clientKey |
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| 144 | * |
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| 145 | * @return Request |
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| 146 | */ |
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| 147 | private function populateRequest($clientKey) |
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| 209 | |||
| 210 | /** |
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| 211 | * @param Navigation[] $navigations |
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| 212 | * |
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| 213 | * @return Refinement[] |
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| 214 | */ |
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| 215 | private function generateSelectedRefinements($navigations) |
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| 251 | |||
| 252 | /** |
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| 253 | * @param string $clientKey Your client key. |
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| 254 | * |
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| 255 | * @return string JSON representation of request to Bridge. |
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| 256 | */ |
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| 257 | public function getBridgeJsonRefinementSearch($clientKey) |
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| 272 | |||
| 273 | public function __construct() |
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| 277 | |||
| 278 | /** |
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| 279 | * @return string The current search string. |
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| 280 | */ |
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| 281 | public function getQuery() |
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| 285 | |||
| 286 | /** |
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| 287 | * @param string $query The search string. |
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| 288 | */ |
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| 289 | public function setQuery($query) |
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| 293 | |||
| 294 | /** |
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| 295 | * @return string The data sub-collection. |
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| 296 | */ |
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| 297 | public function getCollection() |
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| 301 | |||
| 302 | /** |
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| 303 | * @param string $collection The string representation of a collection query. |
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| 304 | */ |
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| 305 | public function setCollection($collection) |
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| 309 | |||
| 310 | /** |
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| 311 | * @return string The area name. |
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| 312 | */ |
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| 313 | public function getArea() |
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| 317 | |||
| 318 | /** |
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| 319 | * @param string $area The area name. |
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| 320 | */ |
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| 321 | public function setArea($area) |
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| 325 | |||
| 326 | /** |
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| 327 | * @return string[] A list of metadata fields that will be returned by the search engine. |
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| 328 | */ |
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| 329 | public function getFields() |
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| 333 | |||
| 334 | /** |
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| 335 | * @return string[] A list of the fields that the search service will treat as OR'able. |
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| 336 | */ |
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| 337 | public function getOrFields() |
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| 341 | |||
| 342 | /** |
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| 343 | * @param string[] $fields A list of case-sensitive names of the attributes to return. |
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| 344 | */ |
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| 345 | public function addFields($fields) |
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| 349 | |||
| 350 | /** |
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| 351 | * @return string[] A list of which navigations to return from the bridge. |
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| 352 | */ |
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| 353 | public function getIncludedNavigations() |
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| 357 | |||
| 358 | /** |
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| 359 | * @param string[] $navigations A list of which navigations to return from the bridge. |
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| 360 | */ |
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| 361 | public function addIncludedNavigations($navigations) |
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| 365 | |||
| 366 | /** |
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| 367 | * @return string[] A list of which navigations to not return from the bridge. |
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| 368 | */ |
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| 369 | public function getExcludedNavigations() |
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| 373 | |||
| 374 | /** |
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| 375 | * @param string[] $navigations A list of which navigations to not return from the bridge. |
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| 376 | */ |
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| 377 | public function addExcludedNavigations($navigations) |
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| 381 | |||
| 382 | /** |
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| 383 | * @return Navigation[] |
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| 384 | */ |
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| 385 | public function &getNavigations() |
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| 389 | |||
| 390 | /** |
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| 391 | * @param Navigation[] $navigations |
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| 392 | */ |
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| 393 | public function setNavigations($navigations) |
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| 397 | |||
| 398 | /** |
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| 399 | * @param string $name The case-sensitive name of the attribute to return. |
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| 400 | */ |
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| 401 | public function addField($name) |
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| 405 | |||
| 406 | /** |
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| 407 | * @param string $name Field that should be treated as OR. |
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| 408 | */ |
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| 409 | public function addOrField($name) |
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| 413 | |||
| 414 | /** |
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| 415 | * @param string[] $fields A list of fields that should be treated as OR. |
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| 416 | */ |
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| 417 | public function addOrFields($fields) |
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| 421 | |||
| 422 | /** |
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| 423 | * @param string $name The parameter name. |
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| 424 | * @param string $value The parameter value. |
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| 425 | */ |
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| 426 | public function addCustomUrlParamByName($name, $value) |
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| 431 | |||
| 432 | /** |
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| 433 | * @param CustomUrlParam $param Set an additional parameter that can be used to trigger rules. |
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| 434 | */ |
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| 435 | public function addCustomUrlParam($param) |
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| 439 | |||
| 440 | public function splitRefinements($refinementString) |
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| 447 | |||
| 448 | /** |
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| 449 | * @param string $refinementString A tilde separated list of refinements. |
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| 450 | */ |
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| 451 | public function addRefinementsByString($refinementString) |
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| 494 | |||
| 495 | /** |
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| 496 | * @param string $navigationName The name of the Navigation. |
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| 497 | * @param Refinement $refinement A RefinementRange or RefinementValue object. |
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| 498 | */ |
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| 499 | public function addRefinement($navigationName, $refinement) |
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| 513 | |||
| 514 | /** |
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| 515 | * @param string $navigationName The name of the refinement. |
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| 516 | * @param mixed $low The low value. |
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| 517 | * @param mixed $high The high value. |
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| 518 | * @param bool $exclude True if the results should exclude this range refinement, false otherwise. |
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| 519 | */ |
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| 520 | public function addRangeRefinement($navigationName, $low, $high, $exclude = false) |
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| 525 | |||
| 526 | /** |
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| 527 | * @param string $navigationName The name of the refinement. |
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| 528 | * @param mixed $value The refinement value. |
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| 529 | * @param bool $exclude True if the results should exclude this value refinement, false otherwise. |
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| 530 | */ |
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| 531 | public function addValueRefinement($navigationName, $value, $exclude = false) |
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| 536 | |||
| 537 | /** |
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| 538 | * @return bool Are refinements with zero counts being removed. |
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| 539 | */ |
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| 540 | public function isPruneRefinements() |
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| 544 | |||
| 545 | /** |
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| 546 | * @param bool $pruneRefinements Specifies whether refinements should be pruned. |
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| 547 | */ |
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| 548 | public function setPruneRefinements($pruneRefinements) |
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| 552 | |||
| 553 | /** |
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| 554 | * @return MSort[] The current list of sort parameters. |
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| 555 | */ |
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| 556 | public function &getSort() |
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| 560 | |||
| 561 | /** |
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| 562 | * @param MSort[] $sort Any number of sort criteria. |
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| 563 | */ |
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| 564 | public function setSort($sort) |
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| 568 | |||
| 569 | /** |
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| 570 | * @return int The number of documents to skip. |
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| 571 | */ |
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| 572 | public function getSkip() |
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| 576 | |||
| 577 | /** |
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| 578 | * @param int $skip The number of documents to skip. |
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| 579 | */ |
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| 580 | public function setSkip($skip) |
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| 584 | |||
| 585 | /** |
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| 586 | * @return CustomUrlParam[] A list of custom url params. |
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| 587 | */ |
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| 588 | public function getCustomUrlParams() |
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| 592 | |||
| 593 | /** |
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| 594 | * @param CustomUrlParam[] $customUrlParams Set the custom url params. |
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| 595 | */ |
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| 596 | public function setCustomUrlParams($customUrlParams) |
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| 600 | |||
| 601 | // /** |
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| 602 | // * @return bool Is return JSON set to true. |
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| 603 | // */ |
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| 604 | // public function isReturnBinary() |
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| 605 | // { |
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| 606 | // return $this->returnBinary; |
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| 607 | // } |
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| 608 | // |
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| 609 | // /** |
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| 610 | // * @param bool $returnBinary Whether to tell the bridge to return binary data rather than JSON. |
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| 611 | // */ |
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| 612 | // public function setReturnBinary($returnBinary) |
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| 613 | // { |
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| 614 | // $this->returnBinary = $returnBinary; |
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| 615 | // } |
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| 616 | |||
| 617 | /** |
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| 618 | * @return string The current language restrict value. |
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| 619 | */ |
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| 620 | public function getLanguage() |
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| 624 | |||
| 625 | /** |
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| 626 | * @param string $language The value for language restrict. |
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| 627 | */ |
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| 628 | public function setLanguage($language) |
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| 632 | |||
| 633 | /** |
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| 634 | * @return string The current biasing profile name. |
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| 635 | */ |
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| 636 | public function getBiasingProfile() |
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| 640 | |||
| 641 | /** |
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| 642 | * @param string $biasingProfile Override the biasing profile used for this query. |
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| 643 | */ |
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| 644 | public function setBiasingProfile($biasingProfile) |
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| 648 | |||
| 649 | /** |
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| 650 | * @return int The current page size. |
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| 651 | */ |
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| 652 | public function getPageSize() |
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| 656 | |||
| 657 | /** |
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| 658 | * @param int $pageSize The number of records to return with the query. |
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| 659 | */ |
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| 660 | public function setPageSize($pageSize) |
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| 664 | |||
| 665 | /** |
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| 666 | * @return boolean |
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| 667 | */ |
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| 668 | public function isDisableAutocorrection() |
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| 672 | |||
| 673 | /** |
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| 674 | * @param boolean $disableAutocorrection Specifies whether the auto-correction behavior should be disabled. |
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| 675 | * By default, when no results are returned for the given query (and there is |
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| 676 | * a did-you-mean available), the first did-you-mean is automatically queried |
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| 677 | * instead. |
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| 678 | */ |
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| 679 | public function setDisableAutocorrection($disableAutocorrection) |
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| 683 | |||
| 684 | /** |
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| 685 | * @return boolean |
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| 686 | */ |
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| 687 | public function isWildcardSearchEnabled() |
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| 691 | |||
| 692 | /** |
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| 693 | * @param boolean $wildcardSearchEnabled Indicate if the *(star) character in the search string should be treated |
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| 694 | * as a wildcard prefix search. For example, `sta*` will match `star` and |
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| 695 | * `start`. |
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| 696 | */ |
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| 697 | public function setWildcardSearchEnabled($wildcardSearchEnabled) |
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| 701 | |||
| 702 | /** |
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| 703 | * <b>Warning</b> This will count as two queries against your search index. |
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| 704 | * |
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| 705 | * Typically, this feature is used when you have a large number of navigation items that will overwhelm the end |
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| 706 | * user. It works by using one of the existing navigation items to decide what the query is about and fires a second |
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| 707 | * query to restrict the navigation to the most relevant set of navigation items for this search term. |
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| 708 | * |
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| 709 | * For example, if you pass in a search of `paper` and a restrict navigation of `category:2` |
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| 710 | * |
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| 711 | * The bridge will find the category navigation refinements in the first query and fire a second query for the top 2 |
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| 712 | * most populous categories. Therefore, a search for something generic like "paper" will bring back top category |
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| 713 | * matches like copy paper (1,030), paper pads (567). The bridge will fire off the second query with the search |
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| 714 | * term, plus an OR refinement with the most likely categories. The navigation items in the first query are |
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| 715 | * entirely replaced with the navigation items in the second query, except for the navigation that was used for the |
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| 716 | * restriction so that users still have the ability to navigate by all category types. |
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| 717 | * |
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| 718 | * @param RestrictNavigation $restrictNavigation Restriction criteria |
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| 719 | */ |
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| 720 | public function setRestrictNavigation($restrictNavigation) |
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| 724 | |||
| 725 | /** @return RestrictNavigation */ |
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| 726 | public function getRestrictNavigation() |
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| 730 | |||
| 731 | /** |
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| 732 | * @return MBiasing |
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| 733 | */ |
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| 734 | public function getBiasing() |
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| 738 | |||
| 739 | /** |
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| 740 | * Add a biasing profile, which is defined at query time. |
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| 741 | * |
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| 742 | * @param MBiasing $biasing |
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| 743 | */ |
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| 744 | public function setBiasing($biasing) |
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| 748 | |||
| 749 | /** |
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| 750 | * @param string[] $bringToTop |
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| 751 | */ |
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| 752 | public function setBringToTop($bringToTop) |
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| 759 | |||
| 760 | /** |
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| 761 | * @param boolean $augment |
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| 762 | */ |
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| 763 | public function setBiasingAugment($augment) |
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| 770 | |||
| 771 | /** |
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| 772 | * @param float $influence |
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| 773 | */ |
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| 774 | public function setInfluence($influence) |
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| 781 | |||
| 782 | /** |
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| 783 | * @return string A string representation of all of the currently set refinements. |
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| 784 | */ |
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| 785 | View Code Duplication | public function getRefinementString() |
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| 800 | |||
| 801 | /** |
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| 802 | * @return string A string representation of all of the currently set custom url parameters. |
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| 803 | */ |
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| 804 | View Code Duplication | public function getCustomUrlParamsString() |
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| 817 | |||
| 818 | /** |
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| 819 | * @return MMatchStrategy |
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| 820 | */ |
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| 821 | public function getMatchStrategy() { |
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| 824 | |||
| 825 | /** |
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| 826 | * @param MMatchStrategy $matchStrategy |
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| 827 | */ |
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| 828 | public function setMatchStrategy($matchStrategy) { |
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| 831 | |||
| 832 | /** |
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| 833 | * @param MSort $sort |
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| 834 | * |
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| 835 | * @return RSort |
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| 836 | */ |
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| 837 | protected static function convertSort($sort) |
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| 855 | |||
| 856 | /** |
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| 857 | * @param MMatchStrategy $strategy |
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| 858 | * |
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| 859 | * @return RMatchStrategy |
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| 860 | */ |
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| 861 | protected static function convertPartialMatchStrategy($strategy) |
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| 878 | |||
| 879 | /** |
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| 880 | * @param MPartialMatchRule $rule |
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| 881 | * |
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| 882 | * @return RPartialMatchRule |
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| 883 | */ |
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| 884 | protected static function convertPartialMatchRule($rule) |
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| 897 | |||
| 898 | /** |
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| 899 | * @param MBias $bias |
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| 900 | * |
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| 901 | * @return Bias |
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| 902 | */ |
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| 903 | protected static function convertBias($bias) |
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| 907 | |||
| 908 | /** |
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| 909 | * @param MBias[] $biases |
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| 910 | * |
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| 911 | * @return Bias[] |
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| 912 | */ |
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| 913 | protected static function convertBiases($biases) |
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| 917 | |||
| 918 | /** |
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| 919 | * @param MNumericBoost $boost |
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| 920 | * |
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| 921 | * @return RNumericBoost |
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| 922 | */ |
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| 923 | protected static function convertNumericBoost($boost) { |
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| 926 | |||
| 927 | /** |
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| 928 | * @param MNumericBoost[] $boosts |
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| 929 | * |
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| 930 | * @return RNumericBoost[] |
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| 931 | */ |
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| 932 | protected static function convertNumericBoosts($boosts) { |
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| 935 | |||
| 936 | /** |
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| 937 | * @param MBiasing $biasing |
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| 938 | * |
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| 939 | * @return Biasing |
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| 940 | */ |
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| 941 | protected static function convertBiasing($biasing) |
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| 970 | |||
| 971 | /** |
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| 972 | * @return string |
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| 973 | */ |
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| 974 | public function getUserId() |
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| 978 | |||
| 979 | /** |
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| 980 | * @param string $userId |
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| 981 | * |
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| 982 | * @return Query |
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| 983 | */ |
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| 984 | public function setUserId($userId) |
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| 989 | |||
| 990 | } |
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| 991 |
Having each class in a dedicated file usually plays nice with PSR autoloaders and is therefore a well established practice. If you use other autoloaders, you might not want to follow this rule.