trivago /
chapi
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 JobComparisonBusinessCase 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 JobComparisonBusinessCase, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 19 | class JobComparisonBusinessCase implements JobComparisonInterface |
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| 20 | { |
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| 21 | /** |
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| 22 | * @var JobRepositoryInterface |
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| 23 | */ |
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| 24 | private $oJobRepositoryLocal; |
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| 25 | |||
| 26 | /** |
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| 27 | * @var JobRepositoryInterface |
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| 28 | */ |
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| 29 | private $oJobRepositoryChronos; |
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| 30 | |||
| 31 | /** |
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| 32 | * @var DiffCompareInterface |
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| 33 | */ |
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| 34 | private $oDiffCompare; |
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| 35 | |||
| 36 | /** |
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| 37 | * @var DatePeriodFactoryInterface |
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| 38 | */ |
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| 39 | private $oDatePeriodFactory; |
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| 40 | |||
| 41 | /** |
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| 42 | * @var LoggerInterface |
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| 43 | */ |
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| 44 | private $oLogger; |
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| 45 | |||
| 46 | |||
| 47 | /** |
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| 48 | * @param JobRepositoryInterface $oJobRepositoryLocal |
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| 49 | * @param JobRepositoryInterface $oJobRepositoryChronos |
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| 50 | * @param DiffCompareInterface $oDiffCompare |
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| 51 | * @param DatePeriodFactoryInterface $oDatePeriodFactory |
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| 52 | * @param LoggerInterface $oLogger |
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| 53 | */ |
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| 54 | 4 | public function __construct( |
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| 55 | JobRepositoryInterface $oJobRepositoryLocal, |
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| 56 | JobRepositoryInterface $oJobRepositoryChronos, |
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| 57 | DiffCompareInterface $oDiffCompare, |
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| 58 | DatePeriodFactoryInterface $oDatePeriodFactory, |
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| 59 | LoggerInterface $oLogger |
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| 60 | ) |
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| 61 | { |
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| 62 | 4 | $this->oJobRepositoryLocal = $oJobRepositoryLocal; |
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| 63 | 4 | $this->oJobRepositoryChronos = $oJobRepositoryChronos; |
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| 64 | 4 | $this->oDiffCompare = $oDiffCompare; |
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| 65 | 4 | $this->oDatePeriodFactory = $oDatePeriodFactory; |
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| 66 | 4 | $this->oLogger = $oLogger; |
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| 67 | 4 | } |
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| 68 | |||
| 69 | /** |
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| 70 | * @return string[] |
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| 71 | */ |
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| 72 | public function getLocalMissingJobs() |
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| 79 | |||
| 80 | /** |
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| 81 | * @return string[] |
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| 82 | */ |
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| 83 | public function getChronosMissingJobs() |
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| 90 | |||
| 91 | /** |
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| 92 | * @return string[] |
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| 93 | */ |
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| 94 | 2 | public function getLocalJobUpdates() |
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| 117 | |||
| 118 | /** |
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| 119 | * @param string $sJobName |
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| 120 | * @return string[] |
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| 121 | */ |
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| 122 | public function getJobDiff($sJobName) |
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| 144 | |||
| 145 | /** |
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| 146 | * @param JobEntity $oJobEntityA |
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| 147 | * @param JobEntity $oJobEntityB |
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| 148 | * @return bool |
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| 149 | */ |
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| 150 | 2 | public function hasSameJobType(JobEntity $oJobEntityA, JobEntity $oJobEntityB) |
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| 157 | |||
| 158 | /** |
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| 159 | * @param JobEntity $oJobEntityA |
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| 160 | * @param JobEntity $oJobEntityB |
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| 161 | * @return array |
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| 162 | */ |
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| 163 | 2 | private function compareJobEntities(JobEntity $oJobEntityA, JobEntity $oJobEntityB) |
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| 192 | |||
| 193 | /** |
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| 194 | * @param string $sProperty |
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| 195 | * @param JobEntity $oJobEntityA |
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| 196 | * @param JobEntity $oJobEntityB |
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| 197 | * @return bool |
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| 198 | */ |
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| 199 | 2 | private function isJobEntityValueIdentical($sProperty, JobEntity $oJobEntityA, JobEntity $oJobEntityB) |
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| 200 | { |
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| 201 | 2 | $mValueA = $oJobEntityA->{$sProperty}; |
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| 202 | 2 | $mValueB = $oJobEntityB->{$sProperty}; |
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| 203 | |||
| 204 | switch ($sProperty) |
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| 205 | { |
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| 206 | 2 | case 'schedule': |
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| 207 | 1 | return $this->isSchedulePropertyIdentical($oJobEntityA, $oJobEntityB); |
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| 208 | |||
| 209 | 2 | case 'scheduleTimeZone': |
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| 210 | 1 | return $this->isScheduleTimeZonePropertyIdentical($oJobEntityA, $oJobEntityB); |
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| 211 | |||
| 212 | 1 | case 'parents': |
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| 213 | return ( |
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| 214 | is_array($mValueA) |
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| 215 | && is_array($mValueB) |
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| 216 | && count(array_diff($mValueA, $mValueB)) == 0 |
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| 217 | && count(array_diff($mValueB, $mValueA)) == 0 |
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| 218 | ); |
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| 219 | |||
| 220 | 1 | case 'successCount': |
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| 221 | 1 | case 'lastSuccess': |
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| 222 | 1 | case 'errorCount': |
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| 223 | 1 | case 'errorsSinceLastSuccess': |
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| 224 | 1 | case 'lastError': |
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| 225 | return true; |
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| 226 | |||
| 227 | 1 | default: |
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| 228 | 1 | return ($mValueA == $mValueB); |
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| 229 | 1 | } |
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| 230 | } |
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| 231 | |||
| 232 | /** |
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| 233 | * @param JobEntity $oJobEntityA |
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| 234 | * @param JobEntity $oJobEntityB |
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| 235 | * @return bool |
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| 236 | */ |
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| 237 | 1 | private function isScheduleTimeZonePropertyIdentical(JobEntity $oJobEntityA, JobEntity $oJobEntityB) |
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| 254 | |||
| 255 | /** |
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| 256 | * @param JobEntity $oJobEntityA |
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| 257 | * @param JobEntity $oJobEntityB |
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| 258 | * @return bool |
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| 259 | */ |
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| 260 | 1 | private function isSchedulePropertyIdentical(JobEntity $oJobEntityA, JobEntity $oJobEntityB) |
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| 319 | |||
| 320 | /** |
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| 321 | * @param string $sIso8601String |
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| 322 | * @param string $sTimeZone |
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| 323 | * @return \DateTime |
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| 324 | */ |
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| 325 | 1 | private function createDateTimeObj($sIso8601String, $sTimeZone = '') |
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| 341 | |||
| 342 | /** |
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| 343 | * @param string $sIso8601StringA |
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| 344 | * @param string $sIso8601StringB |
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| 345 | * @return bool |
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| 346 | */ |
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| 347 | 1 | private function isEqualInterval($sIso8601StringA, $sIso8601StringB) |
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| 354 | |||
| 355 | /** |
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| 356 | * @param JobCollection $oJobCollectionA |
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| 357 | * @param JobCollection $oJobCollectionB |
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| 358 | * @return string[] |
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| 359 | */ |
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| 360 | private function getMissingJobsInCollectionA(JobCollection $oJobCollectionA, JobCollection $oJobCollectionB) |
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| 367 | } |
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This check compares the return type specified in the
@returnannotation of a function or method doc comment with the types returned by the function and raises an issue if they mismatch.