Complex classes like SwiftTwigMailTemplate 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 SwiftTwigMailTemplate, and based on these observations, apply Extract Interface, too.
1 | <?php |
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7 | class SwiftTwigMailTemplate implements SwiftMailTemplate |
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8 | { |
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9 | /** |
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10 | * @var \Twig_Environment |
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11 | */ |
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12 | protected $twigEnvironment; |
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13 | |||
14 | /** |
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15 | * @var string |
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16 | */ |
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17 | protected $twigPath; |
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18 | |||
19 | /** |
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20 | * @var string|array |
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21 | */ |
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22 | protected $fromAddresses; |
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23 | |||
24 | /** |
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25 | * @var string |
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26 | */ |
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27 | protected $fromName = null; |
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28 | |||
29 | /** |
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30 | * @var string|array |
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31 | */ |
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32 | protected $toAddresses; |
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33 | |||
34 | /** |
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35 | * @var string |
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36 | */ |
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37 | protected $toName = null; |
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38 | |||
39 | /** |
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40 | * @var string|array |
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41 | */ |
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42 | protected $bccAddresses; |
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43 | |||
44 | /** |
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45 | * @var string |
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46 | */ |
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47 | protected $bccName = null; |
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48 | |||
49 | /** |
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50 | * @var string|array |
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51 | */ |
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52 | protected $ccAddresses; |
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53 | |||
54 | /** |
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55 | * @var string |
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56 | */ |
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57 | protected $ccName = null; |
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58 | |||
59 | /** |
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60 | * @var string|array |
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61 | */ |
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62 | protected $replyToAddresses; |
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63 | |||
64 | /** |
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65 | * @var string |
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66 | */ |
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67 | protected $replyToName = null; |
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68 | |||
69 | /** |
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70 | * @var int |
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71 | */ |
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72 | protected $maxLineLength = 1000; |
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73 | |||
74 | /** |
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75 | * @var int |
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76 | */ |
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77 | protected $priority; |
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78 | |||
79 | /** |
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80 | * @var string |
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81 | */ |
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82 | protected $readReceiptTo; |
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83 | |||
84 | /** |
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85 | * @var string |
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86 | */ |
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87 | protected $returnPath; |
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88 | |||
89 | /** |
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90 | * SwiftTwigMailGenerator constructor. |
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91 | * |
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92 | * @param \Twig_Environment $twig_Environment |
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93 | * @param string $twigPath |
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94 | */ |
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95 | 4 | public function __construct(\Twig_Environment $twig_Environment, string $twigPath) |
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100 | |||
101 | /** |
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102 | * @param array $data |
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103 | * |
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104 | * @return \Swift_Message |
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105 | */ |
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106 | 4 | public function renderMail(array $data = []) :\Swift_Message |
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167 | |||
168 | /** |
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169 | * @param array|string $fromAddresses |
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170 | */ |
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171 | 1 | public function setFromAddresses($fromAddresses) |
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175 | |||
176 | /** |
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177 | * @param string $fromName |
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178 | */ |
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179 | 1 | public function setFromName($fromName) |
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183 | |||
184 | /** |
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185 | * @param array|string $toAddresses |
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186 | */ |
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187 | 1 | public function setToAddresses($toAddresses) |
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191 | |||
192 | /** |
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193 | * @param string $toName |
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194 | */ |
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195 | 1 | public function setToName($toName) |
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199 | |||
200 | /** |
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201 | * @param array|string $bccAddresses |
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202 | */ |
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203 | 1 | public function setBccAddresses($bccAddresses) |
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207 | |||
208 | /** |
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209 | * @param string $bccName |
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210 | */ |
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211 | 1 | public function setBccName($bccName) |
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215 | |||
216 | /** |
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217 | * @param array|string $ccAddresses |
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218 | */ |
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219 | 1 | public function setCcAddresses($ccAddresses) |
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223 | |||
224 | /** |
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225 | * @param string $ccName |
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226 | */ |
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227 | 1 | public function setCcName($ccName) |
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231 | |||
232 | /** |
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233 | * @param array|string $replyToAddresses |
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234 | */ |
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235 | 1 | public function setReplyToAddresses($replyToAddresses) |
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239 | |||
240 | /** |
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241 | * @param string $replyToName |
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242 | */ |
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243 | 1 | public function setReplyToName($replyToName) |
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247 | |||
248 | /** |
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249 | * @param int $maxLineLength |
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250 | */ |
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251 | 1 | public function setMaxLineLength($maxLineLength) |
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255 | |||
256 | /** |
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257 | * @param int $priority |
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258 | */ |
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259 | 1 | public function setPriority($priority) |
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263 | |||
264 | /** |
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265 | * @param string $readReceiptTo |
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266 | */ |
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267 | 1 | public function setReadReceiptTo($readReceiptTo) |
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271 | |||
272 | /** |
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273 | * @param string $returnPath |
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274 | */ |
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275 | 1 | public function setReturnPath($returnPath) |
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279 | |||
280 | /** |
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281 | * Removes the HTML tags from the text. |
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282 | * |
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283 | * @param string $s |
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284 | * @param string $keep The list of tags to keep |
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285 | * @param string $expand The list of tags to remove completely, along their content |
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286 | */ |
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287 | 1 | private function removeHtml(string $s, string $keep = '', string $expand = 'script|style|noframes|select|option') :string |
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329 | |||
330 | /** |
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331 | * @param string $s |
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332 | * @param string $openTag |
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333 | * @param string $closeTag |
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334 | * |
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335 | * @return mixed|string |
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336 | */ |
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337 | 1 | private function removeElement(string $s, string $openTag, string $closeTag) |
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351 | |||
352 | /** |
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353 | * @param string $s |
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354 | * @param array $tagToKeep |
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355 | * @param string $initial |
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356 | * @param string $finalize |
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357 | * |
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358 | * @return string |
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359 | */ |
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360 | private function keepTag(string $s, array $tagToKeep, string $initial, string $finalize):string |
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370 | } |
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371 |
This check marks calls to methods that do not seem to exist on an object.
This is most likely the result of a method being renamed without all references to it being renamed likewise.