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 Archangel 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 Archangel, and based on these observations, apply Extract Interface, too.
1 | <?php |
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16 | class Archangel implements LoggerAwareInterface |
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17 | { |
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18 | |||
19 | /** @var string $subject */ |
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20 | protected $subject; |
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21 | |||
22 | /** @var array $toAddresses */ |
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23 | protected $toAddresses = array(); |
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24 | |||
25 | /** @var array $ccAddresses */ |
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26 | protected $ccAddresses = array(); |
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27 | |||
28 | /** @var array $bccAddresses */ |
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29 | protected $bccAddresses = array(); |
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30 | |||
31 | /** @var array $headers */ |
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32 | protected $headers = array(); |
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33 | |||
34 | /** @var string $plainMessage */ |
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35 | protected $plainMessage; |
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36 | |||
37 | /** @var string $htmlMessage */ |
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38 | protected $htmlMessage; |
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39 | |||
40 | /** @var array $attachments */ |
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41 | protected $attachments = array(); |
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42 | |||
43 | /** @var string $boundary */ |
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44 | protected $boundary; |
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45 | |||
46 | /** @var string $alternativeBoundary */ |
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47 | protected $alternativeBoundary; |
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48 | |||
49 | /** @var LoggerInterface */ |
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50 | protected $logger; |
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51 | |||
52 | /** @var string LINE_BREAK */ |
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53 | const LINE_BREAK = "\r\n"; |
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54 | |||
55 | /** |
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56 | * @param string $mailer |
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57 | */ |
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58 | public function __construct($mailer = null) |
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67 | |||
68 | /** |
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69 | * @param LoggerInterface $logger |
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70 | * |
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71 | * @return $this; |
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72 | */ |
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73 | public function setLogger(LoggerInterface $logger) |
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79 | |||
80 | /** |
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81 | * Setter method for adding recipients |
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82 | * |
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83 | * @param string $address email address for the recipient |
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84 | * @param string $title name of the recipient (optional) |
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85 | |||
86 | * @return object instantiated $this |
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87 | */ |
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88 | View Code Duplication | public function addTo($address, $title = '') |
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97 | |||
98 | /** |
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99 | * Setter method for adding cc recipients |
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100 | * |
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101 | * @param string $address email address for the cc recipient |
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102 | * @param string $title name of the cc recipient (optional) |
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103 | * |
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104 | * @return object instantiated $this |
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105 | */ |
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106 | View Code Duplication | public function addCC($address, $title = '') |
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115 | |||
116 | /** |
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117 | * Setter method for adding bcc recipients |
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118 | * |
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119 | * @param string $address email address for the bcc recipient |
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120 | * @param string $title name of the bcc recipient (optional) |
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121 | * |
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122 | * @return object instantiated $this |
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123 | */ |
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124 | View Code Duplication | public function addBCC($address, $title = '') |
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133 | |||
134 | /** |
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135 | * Setter method for setting the single 'from' field |
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136 | * |
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137 | * @param string $address email address for the sender |
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138 | * @param string $title name of the sender (optional) |
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139 | * |
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140 | * @return object instantiated $this |
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141 | */ |
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142 | View Code Duplication | public function setFrom($address, $title = '') |
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151 | |||
152 | /** |
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153 | * Setter method for setting the single 'reply-to' field |
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154 | * |
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155 | * @param string $address email address for the reply-to |
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156 | * @param string $title name of the reply-to (optional) |
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157 | * |
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158 | * @return object instantiated $this |
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159 | */ |
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160 | View Code Duplication | public function setReplyTo($address, $title = '') |
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169 | |||
170 | /** |
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171 | * Setter method for setting a subject |
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172 | * |
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173 | * @param string $subject subject for the email |
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174 | * |
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175 | * @return object instantiated $this |
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176 | */ |
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177 | public function setSubject($subject) |
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183 | |||
184 | /** |
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185 | * Setter method for the plain text message |
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186 | * |
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187 | * @param string $message the plain-text message |
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188 | * |
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189 | * @return object instantiated $this |
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190 | */ |
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191 | public function setPlainMessage($message) |
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197 | |||
198 | /** |
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199 | * Setter method for the html message |
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200 | * |
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201 | * @param string $message the html message |
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202 | * |
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203 | * @return object instantiated $this |
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204 | */ |
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205 | public function setHTMLMessage($message) |
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211 | |||
212 | /** |
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213 | * Setter method for adding attachments |
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214 | * |
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215 | * @param string $path the full path of the attachment |
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216 | * @param string $type mime type of the file |
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217 | * @param string $title the title of the attachment (optional) |
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218 | * |
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219 | * @return object instantiated $this |
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220 | */ |
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221 | public function addAttachment($path, $type, $title = '') |
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231 | |||
232 | /** |
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233 | * The executing step, the actual sending of the email |
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234 | * First checks to make sure the minimum fields are set (returns false if they are not) |
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235 | * Second it attempts to send the mail with php's mail() (returns false if it fails) |
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236 | * |
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237 | * return boolean whether or not the email was valid & sent |
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238 | */ |
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239 | public function send() |
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252 | |||
253 | /** |
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254 | * Call to check the minimum required fields |
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255 | * |
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256 | * @return boolean whether or not the email meets the minimum required fields |
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257 | */ |
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258 | protected function checkRequiredFields() |
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273 | |||
274 | /** |
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275 | * Build the recipients from 'to' |
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276 | * |
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277 | * @return string comma-separated lit of recipients |
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278 | */ |
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279 | protected function buildTo() |
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283 | |||
284 | /** |
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285 | * Long, nasty creater of the actual message, with all the multipart logic you'd never want to see |
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286 | * |
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287 | * @return string email message |
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288 | */ |
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289 | protected function buildMessage() |
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346 | |||
347 | |||
348 | /** |
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349 | * Builder for the additional headers needed for multipart emails |
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350 | * |
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351 | * @return string headers needed for multipart |
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352 | */ |
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353 | protected function buildHeaders() |
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377 | |||
378 | /** |
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379 | * File reader for attachments |
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380 | * |
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381 | * @return string binary representation of file, base64'd |
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382 | */ |
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383 | protected function buildAttachmentContent($attachment) |
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397 | |||
398 | /** |
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399 | * Holder for the boundry logic |
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400 | * Not called/created unless it's needed |
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401 | * |
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402 | * @return string boundary |
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403 | */ |
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404 | protected function getBoundary() |
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411 | |||
412 | /** |
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413 | * Holder to create the alternative boundry logic |
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414 | * Not called/created unless it's needed |
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415 | * |
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416 | * @return string alternative boundary |
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417 | */ |
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418 | protected function getAlternativeBoundary() |
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425 | } |
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426 |
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