Complex classes like Attachment 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 Attachment, and based on these observations, apply Extract Interface, too.
| 1 | <?php  | 
            ||
| 7 | class Attachment  | 
            ||
| 8 | { | 
            ||
| 9 | /**  | 
            ||
| 10 | * The fallback text to use for clients that don't support attachments.  | 
            ||
| 11 | *  | 
            ||
| 12 | * @var string  | 
            ||
| 13 | */  | 
            ||
| 14 | protected $fallback;  | 
            ||
| 15 | |||
| 16 | /**  | 
            ||
| 17 | * Optional text that should appear within the attachment.  | 
            ||
| 18 | *  | 
            ||
| 19 | * @var string  | 
            ||
| 20 | */  | 
            ||
| 21 | protected $text;  | 
            ||
| 22 | |||
| 23 | /**  | 
            ||
| 24 | * Optional image that should appear within the attachment.  | 
            ||
| 25 | *  | 
            ||
| 26 | * @var string  | 
            ||
| 27 | */  | 
            ||
| 28 | protected $image_url;  | 
            ||
| 29 | |||
| 30 | /**  | 
            ||
| 31 | * Optional thumbnail that should appear within the attachment.  | 
            ||
| 32 | *  | 
            ||
| 33 | * @var string  | 
            ||
| 34 | */  | 
            ||
| 35 | protected $thumb_url;  | 
            ||
| 36 | |||
| 37 | /**  | 
            ||
| 38 | * Optional text that should appear above the formatted data.  | 
            ||
| 39 | *  | 
            ||
| 40 | * @var string  | 
            ||
| 41 | */  | 
            ||
| 42 | protected $pretext;  | 
            ||
| 43 | |||
| 44 | /**  | 
            ||
| 45 | * Optional title for the attachment.  | 
            ||
| 46 | *  | 
            ||
| 47 | * @var string  | 
            ||
| 48 | */  | 
            ||
| 49 | protected $title;  | 
            ||
| 50 | |||
| 51 | /**  | 
            ||
| 52 | * Optional title link for the attachment.  | 
            ||
| 53 | *  | 
            ||
| 54 | * @var string  | 
            ||
| 55 | */  | 
            ||
| 56 | protected $title_link;  | 
            ||
| 57 | |||
| 58 | /**  | 
            ||
| 59 | * Optional author name for the attachment.  | 
            ||
| 60 | *  | 
            ||
| 61 | * @var string  | 
            ||
| 62 | */  | 
            ||
| 63 | protected $author_name;  | 
            ||
| 64 | |||
| 65 | /**  | 
            ||
| 66 | * Optional author link for the attachment.  | 
            ||
| 67 | *  | 
            ||
| 68 | * @var string  | 
            ||
| 69 | */  | 
            ||
| 70 | protected $author_link;  | 
            ||
| 71 | |||
| 72 | /**  | 
            ||
| 73 | * Optional author icon for the attachment.  | 
            ||
| 74 | *  | 
            ||
| 75 | * @var string  | 
            ||
| 76 | */  | 
            ||
| 77 | protected $author_icon;  | 
            ||
| 78 | |||
| 79 | /**  | 
            ||
| 80 | * The color to use for the attachment.  | 
            ||
| 81 | *  | 
            ||
| 82 | * @var string  | 
            ||
| 83 | */  | 
            ||
| 84 | protected $color = 'good';  | 
            ||
| 85 | |||
| 86 | /**  | 
            ||
| 87 | * The fields of the attachment.  | 
            ||
| 88 | *  | 
            ||
| 89 | * @var array  | 
            ||
| 90 | */  | 
            ||
| 91 | protected $fields = [];  | 
            ||
| 92 | |||
| 93 | /**  | 
            ||
| 94 | * The fields of the attachment that Slack should interpret  | 
            ||
| 95 | * with its Markdown-like language.  | 
            ||
| 96 | *  | 
            ||
| 97 | * @var array  | 
            ||
| 98 | */  | 
            ||
| 99 | protected $markdown_fields = [];  | 
            ||
| 100 | |||
| 101 | /**  | 
            ||
| 102 | * The text to use for the footer attachment.  | 
            ||
| 103 | *  | 
            ||
| 104 | * @var string  | 
            ||
| 105 | */  | 
            ||
| 106 | protected $footer;  | 
            ||
| 107 | |||
| 108 | /**  | 
            ||
| 109 | * The icon to use for the footer attachment.  | 
            ||
| 110 | *  | 
            ||
| 111 | * @var string  | 
            ||
| 112 | */  | 
            ||
| 113 | protected $footer_icon;  | 
            ||
| 114 | |||
| 115 | /**  | 
            ||
| 116 | * The timestamp to use for the footer attachment.  | 
            ||
| 117 | *  | 
            ||
| 118 | * @var int  | 
            ||
| 119 | */  | 
            ||
| 120 | protected $ts;  | 
            ||
| 121 | |||
| 122 | /**  | 
            ||
| 123 | * Instantiate a new Attachment.  | 
            ||
| 124 | *  | 
            ||
| 125 | * @param array $attributes  | 
            ||
| 126 | * @return void  | 
            ||
| 
                                                                                                    
                        
                         | 
                |||
| 127 | */  | 
            ||
| 128 | public function __construct(array $attributes)  | 
            ||
| 129 |     { | 
            ||
| 130 |         if (isset($attributes['fallback'])) { | 
            ||
| 131 | $this->setFallback($attributes['fallback']);  | 
            ||
| 132 | }  | 
            ||
| 133 | |||
| 134 |         if (isset($attributes['text'])) { | 
            ||
| 135 | $this->setText($attributes['text']);  | 
            ||
| 136 | }  | 
            ||
| 137 | |||
| 138 |         if (isset($attributes['image_url'])) { | 
            ||
| 139 | $this->setImageUrl($attributes['image_url']);  | 
            ||
| 140 | }  | 
            ||
| 141 | |||
| 142 |         if (isset($attributes['thumb_url'])) { | 
            ||
| 143 | $this->setThumbUrl($attributes['thumb_url']);  | 
            ||
| 144 | }  | 
            ||
| 145 | |||
| 146 |         if (isset($attributes['pretext'])) { | 
            ||
| 147 | $this->setPretext($attributes['pretext']);  | 
            ||
| 148 | }  | 
            ||
| 149 | |||
| 150 |         if (isset($attributes['color'])) { | 
            ||
| 151 | $this->setColor($attributes['color']);  | 
            ||
| 152 | }  | 
            ||
| 153 | |||
| 154 |         if (isset($attributes['footer'])) { | 
            ||
| 155 | $this->setFooter($attributes['footer']);  | 
            ||
| 156 | }  | 
            ||
| 157 | |||
| 158 |         if (isset($attributes['footer_icon'])) { | 
            ||
| 159 | $this->setFooterIcon($attributes['footer_icon']);  | 
            ||
| 160 | }  | 
            ||
| 161 | |||
| 162 |         if (isset($attributes['ts'])) { | 
            ||
| 163 | $this->setTs($attributes['ts']);  | 
            ||
| 164 | }  | 
            ||
| 165 | |||
| 166 |         if (isset($attributes['fields'])) { | 
            ||
| 167 | $this->setFields($attributes['fields']);  | 
            ||
| 168 | }  | 
            ||
| 169 | |||
| 170 |         if (isset($attributes['mrkdwn_in'])) { | 
            ||
| 171 | $this->setMarkdownFields($attributes['mrkdwn_in']);  | 
            ||
| 172 | }  | 
            ||
| 173 | |||
| 174 |         if (isset($attributes['title'])) { | 
            ||
| 175 | $this->setTitle($attributes['title']);  | 
            ||
| 176 | }  | 
            ||
| 177 | |||
| 178 |         if (isset($attributes['title_link'])) { | 
            ||
| 179 | $this->setTitleLink($attributes['title_link']);  | 
            ||
| 180 | }  | 
            ||
| 181 | |||
| 182 |         if (isset($attributes['author_name'])) { | 
            ||
| 183 | $this->setAuthorName($attributes['author_name']);  | 
            ||
| 184 | }  | 
            ||
| 185 | |||
| 186 |         if (isset($attributes['author_link'])) { | 
            ||
| 187 | $this->setAuthorLink($attributes['author_link']);  | 
            ||
| 188 | }  | 
            ||
| 189 | |||
| 190 |         if (isset($attributes['author_icon'])) { | 
            ||
| 191 | $this->setAuthorIcon($attributes['author_icon']);  | 
            ||
| 192 | }  | 
            ||
| 193 | }  | 
            ||
| 194 | |||
| 195 | /**  | 
            ||
| 196 | * Get the fallback text.  | 
            ||
| 197 | *  | 
            ||
| 198 | * @return string  | 
            ||
| 199 | */  | 
            ||
| 200 | public function getFallback()  | 
            ||
| 204 | |||
| 205 | /**  | 
            ||
| 206 | * Set the fallback text.  | 
            ||
| 207 | *  | 
            ||
| 208 | * @param string $fallback  | 
            ||
| 209 | * @return $this  | 
            ||
| 210 | */  | 
            ||
| 211 | public function setFallback($fallback)  | 
            ||
| 217 | |||
| 218 | /**  | 
            ||
| 219 | * Get the optional text to appear within the attachment.  | 
            ||
| 220 | *  | 
            ||
| 221 | * @return string  | 
            ||
| 222 | */  | 
            ||
| 223 | public function getText()  | 
            ||
| 227 | |||
| 228 | /**  | 
            ||
| 229 | * Set the optional text to appear within the attachment.  | 
            ||
| 230 | *  | 
            ||
| 231 | * @param string $text  | 
            ||
| 232 | * @return $this  | 
            ||
| 233 | */  | 
            ||
| 234 | public function setText($text)  | 
            ||
| 240 | |||
| 241 | /**  | 
            ||
| 242 | * Get the optional image to appear within the attachment.  | 
            ||
| 243 | *  | 
            ||
| 244 | * @return string  | 
            ||
| 245 | */  | 
            ||
| 246 | public function getImageUrl()  | 
            ||
| 250 | |||
| 251 | /**  | 
            ||
| 252 | * Set the optional image to appear within the attachment.  | 
            ||
| 253 | *  | 
            ||
| 254 | * @param string $image_url  | 
            ||
| 255 | * @return $this  | 
            ||
| 256 | */  | 
            ||
| 257 | public function setImageUrl($image_url)  | 
            ||
| 263 | |||
| 264 | /**  | 
            ||
| 265 | * Get the optional thumbnail to appear within the attachment.  | 
            ||
| 266 | *  | 
            ||
| 267 | * @return string  | 
            ||
| 268 | */  | 
            ||
| 269 | public function getThumbUrl()  | 
            ||
| 273 | |||
| 274 | /**  | 
            ||
| 275 | * Set the optional thumbnail to appear within the attachment.  | 
            ||
| 276 | *  | 
            ||
| 277 | * @param string $thumb_url  | 
            ||
| 278 | * @return $this  | 
            ||
| 279 | */  | 
            ||
| 280 | public function setThumbUrl($thumb_url)  | 
            ||
| 286 | |||
| 287 | /**  | 
            ||
| 288 | * Get the text that should appear above the formatted data.  | 
            ||
| 289 | *  | 
            ||
| 290 | * @return string  | 
            ||
| 291 | */  | 
            ||
| 292 | public function getPretext()  | 
            ||
| 296 | |||
| 297 | /**  | 
            ||
| 298 | * Set the text that should appear above the formatted data.  | 
            ||
| 299 | *  | 
            ||
| 300 | * @param string $pretext  | 
            ||
| 301 | * @return $this  | 
            ||
| 302 | */  | 
            ||
| 303 | public function setPretext($pretext)  | 
            ||
| 309 | |||
| 310 | /**  | 
            ||
| 311 | * Get the color to use for the attachment.  | 
            ||
| 312 | *  | 
            ||
| 313 | * @return string  | 
            ||
| 314 | */  | 
            ||
| 315 | public function getColor()  | 
            ||
| 319 | |||
| 320 | /**  | 
            ||
| 321 | * Set the color to use for the attachment.  | 
            ||
| 322 | *  | 
            ||
| 323 | * @param string $colour  | 
            ||
| 324 | * @return void  | 
            ||
| 325 | */  | 
            ||
| 326 | public function setColor($color)  | 
            ||
| 332 | |||
| 333 | /**  | 
            ||
| 334 | * Get the footer to use for the attachment.  | 
            ||
| 335 | *  | 
            ||
| 336 | * @return string  | 
            ||
| 337 | */  | 
            ||
| 338 | public function getFooter()  | 
            ||
| 342 | |||
| 343 | /**  | 
            ||
| 344 | * Set the footer text to use for the attachment.  | 
            ||
| 345 | *  | 
            ||
| 346 | * @param string $footer  | 
            ||
| 347 | * @return void  | 
            ||
| 348 | */  | 
            ||
| 349 | public function setFooter($footer)  | 
            ||
| 355 | |||
| 356 | /**  | 
            ||
| 357 | * Get the footer icon to use for the attachment.  | 
            ||
| 358 | *  | 
            ||
| 359 | * @return string  | 
            ||
| 360 | */  | 
            ||
| 361 | public function getFooterIcon()  | 
            ||
| 365 | |||
| 366 | /**  | 
            ||
| 367 | * Set the footer icon to use for the attachment.  | 
            ||
| 368 | *  | 
            ||
| 369 | * @param string $footerIcon  | 
            ||
| 370 | * @return void  | 
            ||
| 371 | */  | 
            ||
| 372 | public function setFooterIcon($footerIcon)  | 
            ||
| 378 | |||
| 379 | /**  | 
            ||
| 380 | * Get the timestamp to use for the attachment.  | 
            ||
| 381 | *  | 
            ||
| 382 | * @return int  | 
            ||
| 383 | */  | 
            ||
| 384 | public function getTs()  | 
            ||
| 388 | |||
| 389 | /**  | 
            ||
| 390 | * Set the timestamp to use for the attachment.  | 
            ||
| 391 | *  | 
            ||
| 392 | * @param int $ts  | 
            ||
| 393 | * @return void  | 
            ||
| 394 | */  | 
            ||
| 395 | public function setTs($ts)  | 
            ||
| 401 | |||
| 402 | /**  | 
            ||
| 403 | * Get the title to use for the attachment.  | 
            ||
| 404 | *  | 
            ||
| 405 | * @return string  | 
            ||
| 406 | */  | 
            ||
| 407 | public function getTitle()  | 
            ||
| 411 | |||
| 412 | /**  | 
            ||
| 413 | * Set the title to use for the attachment.  | 
            ||
| 414 | *  | 
            ||
| 415 | * @param string $title  | 
            ||
| 416 | * @return void  | 
            ||
| 417 | */  | 
            ||
| 418 | public function setTitle($title)  | 
            ||
| 424 | |||
| 425 | /**  | 
            ||
| 426 | * Get the title link to use for the attachment.  | 
            ||
| 427 | *  | 
            ||
| 428 | * @return string  | 
            ||
| 429 | */  | 
            ||
| 430 | public function getTitleLink()  | 
            ||
| 434 | |||
| 435 | /**  | 
            ||
| 436 | * Set the title link to use for the attachment.  | 
            ||
| 437 | *  | 
            ||
| 438 | * @param string $title_link  | 
            ||
| 439 | * @return void  | 
            ||
| 440 | */  | 
            ||
| 441 | public function setTitleLink($title_link)  | 
            ||
| 447 | |||
| 448 | /**  | 
            ||
| 449 | * Get the author name to use for the attachment.  | 
            ||
| 450 | *  | 
            ||
| 451 | * @return string  | 
            ||
| 452 | */  | 
            ||
| 453 | public function getAuthorName()  | 
            ||
| 457 | |||
| 458 | /**  | 
            ||
| 459 | * Set the author name to use for the attachment.  | 
            ||
| 460 | *  | 
            ||
| 461 | * @param string $author_name  | 
            ||
| 462 | * @return void  | 
            ||
| 463 | */  | 
            ||
| 464 | public function setAuthorName($author_name)  | 
            ||
| 470 | |||
| 471 | /**  | 
            ||
| 472 | * Get the author link to use for the attachment.  | 
            ||
| 473 | *  | 
            ||
| 474 | * @return string  | 
            ||
| 475 | */  | 
            ||
| 476 | public function getAuthorLink()  | 
            ||
| 480 | |||
| 481 | /**  | 
            ||
| 482 | * Set the auhtor link to use for the attachment.  | 
            ||
| 483 | *  | 
            ||
| 484 | * @param string $author_link  | 
            ||
| 485 | * @return void  | 
            ||
| 486 | */  | 
            ||
| 487 | public function setAuthorLink($author_link)  | 
            ||
| 493 | |||
| 494 | /**  | 
            ||
| 495 | * Get the author icon to use for the attachment.  | 
            ||
| 496 | *  | 
            ||
| 497 | * @return string  | 
            ||
| 498 | */  | 
            ||
| 499 | public function getAuthorIcon()  | 
            ||
| 503 | |||
| 504 | /**  | 
            ||
| 505 | * Set the author icon to use for the attachment.  | 
            ||
| 506 | *  | 
            ||
| 507 | * @param string $author_icon  | 
            ||
| 508 | * @return void  | 
            ||
| 509 | */  | 
            ||
| 510 | public function setAuthorIcon($author_icon)  | 
            ||
| 516 | |||
| 517 | /**  | 
            ||
| 518 | * Get the fields for the attachment.  | 
            ||
| 519 | *  | 
            ||
| 520 | * @return array  | 
            ||
| 521 | */  | 
            ||
| 522 | public function getFields()  | 
            ||
| 526 | |||
| 527 | /**  | 
            ||
| 528 | * Set the fields for the attachment.  | 
            ||
| 529 | *  | 
            ||
| 530 | * @param array $fields  | 
            ||
| 531 | * @return void  | 
            ||
| 532 | */  | 
            ||
| 533 | public function setFields(array $fields)  | 
            ||
| 543 | |||
| 544 | /**  | 
            ||
| 545 | * Add a field to the attachment.  | 
            ||
| 546 | *  | 
            ||
| 547 | * @param mixed $field  | 
            ||
| 548 | * @return $this  | 
            ||
| 549 | */  | 
            ||
| 550 | public function addField($field)  | 
            ||
| 564 | |||
| 565 | /**  | 
            ||
| 566 | * Clear the fields for the attachment.  | 
            ||
| 567 | *  | 
            ||
| 568 | * @return $this  | 
            ||
| 569 | */  | 
            ||
| 570 | public function clearFields()  | 
            ||
| 576 | |||
| 577 | /**  | 
            ||
| 578 | * Get the fields Slack should interpret in its  | 
            ||
| 579 | * Markdown-like language.  | 
            ||
| 580 | *  | 
            ||
| 581 | * @return array  | 
            ||
| 582 | */  | 
            ||
| 583 | public function getMarkdownFields()  | 
            ||
| 587 | |||
| 588 | /**  | 
            ||
| 589 | * Set the fields Slack should interpret in its  | 
            ||
| 590 | * Markdown-like language.  | 
            ||
| 591 | *  | 
            ||
| 592 | * @param array $fields  | 
            ||
| 593 | * @return $this  | 
            ||
| 594 | */  | 
            ||
| 595 | public function setMarkdownFields(array $fields)  | 
            ||
| 601 | |||
| 602 | /**  | 
            ||
| 603 | * Convert this attachment to its array representation.  | 
            ||
| 604 | *  | 
            ||
| 605 | * @return array  | 
            ||
| 606 | */  | 
            ||
| 607 | public function toArray()  | 
            ||
| 628 | |||
| 629 | /**  | 
            ||
| 630 | * Iterates over all fields in this attachment and returns  | 
            ||
| 631 | * them in their array form.  | 
            ||
| 632 | *  | 
            ||
| 633 | * @return array  | 
            ||
| 634 | */  | 
            ||
| 635 | protected function getFieldsAsArrays()  | 
            ||
| 645 | }  | 
            ||
| 646 | 
Adding a
@returnannotation to a constructor is not recommended, since a constructor does not have a meaningful return value.Please refer to the PHP core documentation on constructors.