Complex classes like Subscription 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 Subscription, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 9 | final class Subscription extends BaseResource implements Emptiable, Serializable |
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| 10 | { |
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| 11 | use EmptiableTrait; |
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| 12 | |||
| 13 | /** |
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| 14 | * @var string |
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| 15 | */ |
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| 16 | private $profileId; |
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| 17 | |||
| 18 | /** |
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| 19 | * @var int |
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| 20 | */ |
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| 21 | private $frequency; |
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| 22 | |||
| 23 | /** |
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| 24 | * @var int |
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| 25 | */ |
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| 26 | private $interval; |
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| 27 | |||
| 28 | /** |
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| 29 | * @var string |
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| 30 | */ |
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| 31 | private $start; |
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| 32 | |||
| 33 | /** |
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| 34 | * @var int |
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| 35 | */ |
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| 36 | private $cycle; |
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| 37 | |||
| 38 | /** |
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| 39 | * @var float |
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| 40 | */ |
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| 41 | private $amount; |
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| 42 | |||
| 43 | /** |
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| 44 | * @var bool |
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| 45 | */ |
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| 46 | private $trial; |
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| 47 | |||
| 48 | /** |
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| 49 | * @var int |
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| 50 | */ |
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| 51 | private $trialCycle; |
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| 52 | |||
| 53 | /** |
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| 54 | * @var int |
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| 55 | */ |
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| 56 | private $trialFrequency; |
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| 57 | |||
| 58 | /** |
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| 59 | * @var float |
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| 60 | */ |
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| 61 | private $trialAmount; |
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| 62 | |||
| 63 | /** |
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| 64 | * @return int |
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| 65 | */ |
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| 66 | public function getFrequency() |
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| 70 | |||
| 71 | /** |
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| 72 | * @return int |
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| 73 | */ |
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| 74 | public function getInterval() |
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| 78 | |||
| 79 | /** |
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| 80 | * @return string |
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| 81 | */ |
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| 82 | public function getStart() |
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| 86 | |||
| 87 | /** |
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| 88 | * @return int |
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| 89 | */ |
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| 90 | public function getCycle() |
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| 94 | |||
| 95 | /** |
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| 96 | * @return float |
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| 97 | */ |
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| 98 | public function getAmount() |
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| 102 | |||
| 103 | /** |
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| 104 | * @return bool |
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| 105 | */ |
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| 106 | public function isTrial() |
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| 110 | |||
| 111 | /** |
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| 112 | * @return int |
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| 113 | */ |
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| 114 | public function getTrialCycle() |
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| 118 | |||
| 119 | /** |
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| 120 | * @return int |
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| 121 | */ |
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| 122 | public function getTrialFrequency() |
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| 126 | |||
| 127 | /** |
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| 128 | * @return float |
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| 129 | */ |
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| 130 | public function getTrialAmount() |
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| 134 | |||
| 135 | /** |
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| 136 | * @param int $frequency the frequency |
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| 137 | */ |
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| 138 | public function setFrequency($frequency) |
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| 149 | |||
| 150 | /** |
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| 151 | * Sets the value of interval. |
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| 152 | */ |
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| 153 | public function setInterval($interval) |
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| 165 | |||
| 166 | /** |
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| 167 | * @param string $start the start |
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| 168 | */ |
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| 169 | public function setStart($start) |
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| 181 | |||
| 182 | /** |
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| 183 | * @param int $cycle |
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| 184 | */ |
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| 185 | public function setCycle($cycle) |
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| 196 | |||
| 197 | /** |
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| 198 | * @param float $amount |
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| 199 | */ |
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| 200 | public function setAmount($amount) |
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| 206 | |||
| 207 | /** |
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| 208 | * @param bool $trial |
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| 209 | */ |
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| 210 | public function setTrial($trial) |
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| 216 | |||
| 217 | /** |
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| 218 | * @param int $trialCycle |
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| 219 | */ |
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| 220 | public function setTrialCycle($trialCycle) |
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| 231 | |||
| 232 | /** |
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| 233 | * @param int $trialFrequency |
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| 234 | */ |
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| 235 | public function setTrialFrequency($trialFrequency) |
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| 246 | |||
| 247 | /** |
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| 248 | * @param float $trialAmount |
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| 249 | */ |
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| 250 | public function setTrialAmount($trialAmount) |
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| 256 | |||
| 257 | /** |
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| 258 | * @return string |
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| 259 | */ |
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| 260 | public function getProfileId() |
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| 264 | |||
| 265 | /** |
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| 266 | * @param string $profileId |
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| 267 | */ |
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| 268 | public function setProfileId($profileId) |
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| 279 | |||
| 280 | private function isValidFrequency($frequency) |
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| 284 | |||
| 285 | private function isValidInterval($interval) |
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| 296 | |||
| 297 | private function isValidCycle($cycle) |
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| 301 | |||
| 302 | private function isValidProfileId($profileId) |
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| 306 | |||
| 307 | public function serialize() |
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| 326 | } |
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| 327 |