Complex classes like Mailer 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 Mailer, and based on these observations, apply Extract Interface, too.
| 1 | <?php declare(strict_types = 1); |
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| 29 | class Mailer implements MailerContract |
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| 30 | { |
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| 31 | |||
| 32 | const SPOOL_SEND_EVENT = 'swiftmailer.spool.send'; |
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| 33 | |||
| 34 | /** |
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| 35 | * @var $configs Config |
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| 36 | */ |
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| 37 | public $configs; |
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| 38 | |||
| 39 | /** |
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| 40 | * Stores default transport name |
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| 41 | * |
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| 42 | * @var $defaultTransport string |
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| 43 | */ |
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| 44 | protected $defaultTransport; |
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| 45 | |||
| 46 | /** |
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| 47 | * Disabled flag |
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| 48 | * |
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| 49 | * @var bool |
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| 50 | */ |
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| 51 | protected $disabled = false; |
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| 52 | |||
| 53 | /** |
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| 54 | * @var EventDispatcherAdapter |
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| 55 | */ |
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| 56 | protected $eventDispatcherAdapter; |
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| 57 | |||
| 58 | /** |
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| 59 | * @var EventDispatcher |
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| 60 | */ |
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| 61 | protected $eventDispatcher; |
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| 62 | |||
| 63 | /** |
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| 64 | * Default From: |
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| 65 | * |
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| 66 | * @var $from string |
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| 67 | */ |
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| 68 | protected $from; |
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| 69 | |||
| 70 | /** |
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| 71 | * @var Swift_Transport_SpoolTransport |
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| 72 | */ |
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| 73 | protected $spoolTransport; |
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| 74 | |||
| 75 | /** |
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| 76 | * Default To: |
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| 77 | * |
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| 78 | * @var $to string |
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| 79 | */ |
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| 80 | protected $to; |
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| 81 | |||
| 82 | /** |
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| 83 | * Registered transport storage |
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| 84 | * |
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| 85 | * @var array |
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| 86 | */ |
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| 87 | protected $transports = []; |
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| 88 | |||
| 89 | /** |
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| 90 | * Mailer constructor. |
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| 91 | * |
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| 92 | * @param \Venta\Contracts\Config\Config $config |
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| 93 | * @param EventDispatcher $eventDispatcher |
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| 94 | * @throws Exception |
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| 95 | */ |
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| 96 | public function __construct(Config $config, EventDispatcher $eventDispatcher) |
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| 103 | |||
| 104 | /** |
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| 105 | * Get Swift_Message instance, setting default from if defined/not overwritten |
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| 106 | * |
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| 107 | * @return Swift_Message |
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| 108 | */ |
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| 109 | public function getMessageBuilder(): Swift_Message |
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| 117 | |||
| 118 | /** |
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| 119 | * @return Swift_Transport_SpoolTransport |
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| 120 | */ |
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| 121 | public function getSpoolTransport() |
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| 125 | |||
| 126 | /** |
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| 127 | * @return bool |
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| 128 | */ |
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| 129 | public function isDisabled() : bool |
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| 133 | |||
| 134 | /** |
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| 135 | * @return mixed |
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| 136 | */ |
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| 137 | public function isSpoolEnabled() |
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| 141 | |||
| 142 | /** |
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| 143 | * @param string $transport |
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| 144 | * @return Swift_Mailer |
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| 145 | * @throws TransportException |
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| 146 | */ |
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| 147 | public function spoolWithTransport($transport = '') |
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| 165 | |||
| 166 | /** |
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| 167 | * Get Swift_Mailer with Swift_Transport |
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| 168 | * |
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| 169 | * @param string $transportName |
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| 170 | * @return Swift_Mailer |
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| 171 | */ |
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| 172 | public function withTransport(string $transportName = ''): Swift_Mailer |
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| 178 | |||
| 179 | /** |
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| 180 | * Parse config file interpreting settings |
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| 181 | * |
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| 182 | * @param \Venta\Contracts\Config\Config $config |
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| 183 | * @throws RuntimeException|Exception |
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| 184 | * @return \Closure |
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| 185 | */ |
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| 186 | protected function configureTransport(Config $config) |
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| 203 | |||
| 204 | /** |
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| 205 | * Get mailer configs |
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| 206 | * |
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| 207 | * @param \Venta\Contracts\Config\Config $config |
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| 208 | */ |
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| 209 | protected function getMailerFromGlobalConfig(Config $config) |
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| 222 | |||
| 223 | /** |
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| 224 | * Returns proper transport closure factory |
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| 225 | * |
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| 226 | * @param $transportName |
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| 227 | * @return \Closure |
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| 228 | */ |
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| 229 | protected function getTransport($transportName) |
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| 243 | |||
| 244 | /** |
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| 245 | * Wrap transport instantiation into closure passing necessary config params |
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| 246 | * |
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| 247 | * @param $transport |
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| 248 | * @param $config Config |
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| 249 | * @return \Closure |
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| 250 | * @throws Exception |
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| 251 | */ |
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| 252 | protected function prepareTransportFactory($transport, Config $config) |
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| 310 | |||
| 311 | /** |
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| 312 | * Register transport factories |
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| 313 | * |
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| 314 | * @throws Exception |
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| 315 | * @return array |
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| 316 | */ |
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| 317 | protected function registerTransports() |
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| 348 | |||
| 349 | /** |
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| 350 | * @return Swift_Transport_SpoolTransport|null |
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| 351 | * @throws UnknownTransportException|TransportException|\Swift_IoException |
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| 352 | */ |
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| 353 | protected function setUpSpoolTransport() |
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| 386 | |||
| 387 | /** |
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| 388 | * @param \Venta\Contracts\Config\Config $config |
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| 389 | * @throws TransportException |
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| 390 | * @throws UnknownTransportException |
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| 391 | */ |
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| 392 | protected function validateTransportSettings(Config $config) |
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| 416 | } |
This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces.
This is most likely a typographical error or the method has been renamed.