Complex classes like Page 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 Page, and based on these observations, apply Extract Interface, too.
1 | <?php |
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22 | class Page extends Item |
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23 | { |
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24 | const SLUGIFY_PATTERN = '/(^\/|[^_a-z0-9\/]|-)+/'; |
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25 | |||
26 | /** |
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27 | * @var SplFileInfo |
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28 | */ |
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29 | protected $file; |
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30 | /** |
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31 | * @var bool |
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32 | */ |
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33 | protected $virtual; |
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34 | /** |
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35 | * @var string |
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36 | */ |
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37 | protected $type; |
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38 | /** |
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39 | * @var string |
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40 | */ |
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41 | protected $folder; |
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42 | /** |
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43 | * @var string |
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44 | */ |
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45 | protected $slug; |
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46 | /** |
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47 | * @var string |
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48 | */ |
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49 | protected $path; |
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50 | /** |
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51 | * @var string |
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52 | */ |
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53 | protected $section; |
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54 | /** |
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55 | * @var string |
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56 | */ |
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57 | protected $frontmatter; |
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58 | /** |
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59 | * @var string |
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60 | */ |
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61 | protected $body; |
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62 | /** |
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63 | * @var string |
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64 | */ |
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65 | protected $html; |
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66 | |||
67 | /** |
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68 | * Constructor. |
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69 | * |
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70 | * @param string $id |
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71 | */ |
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72 | public function __construct(string $id) |
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140 | |||
141 | /** |
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142 | * Create ID from file. |
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143 | * |
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144 | * @param SplFileInfo $file |
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145 | * |
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146 | * @return string |
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147 | */ |
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148 | public function createId(SplFileInfo $file): string |
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152 | |||
153 | /** |
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154 | * Set file. |
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155 | * |
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156 | * @param SplFileInfo $file |
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157 | * |
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158 | * @return self |
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159 | */ |
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160 | public function setFile(SplFileInfo $file): self |
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164 | |||
165 | /** |
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166 | * Parse file content. |
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167 | * |
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168 | * @return self |
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169 | */ |
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170 | public function parse(): self |
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179 | |||
180 | /** |
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181 | * Get frontmatter. |
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182 | * |
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183 | * @return string|null |
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184 | */ |
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185 | public function getFrontmatter(): ?string |
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189 | |||
190 | /** |
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191 | * Get body as raw. |
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192 | * |
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193 | * @return string |
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194 | */ |
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195 | public function getBody(): ?string |
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199 | |||
200 | /** |
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201 | * Turn a path (string) into a slug (URL). |
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202 | * |
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203 | * @param string $path |
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204 | * |
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205 | * @return string |
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206 | */ |
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207 | public static function slugify(string $path): string |
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213 | |||
214 | /** |
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215 | * Is current page is virtual? |
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216 | * |
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217 | * @return bool |
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218 | */ |
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219 | public function isVirtual(): bool |
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223 | |||
224 | /** |
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225 | * Set page type. |
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226 | * |
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227 | * @param string $type |
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228 | * |
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229 | * @return self |
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230 | */ |
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231 | public function setType(string $type): self |
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237 | |||
238 | /** |
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239 | * Get page type. |
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240 | * |
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241 | * @return string |
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242 | */ |
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243 | public function getType(): string |
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247 | |||
248 | /** |
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249 | * Set path without slug. |
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250 | * |
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251 | * @param string $folder |
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252 | * |
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253 | * @return self |
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254 | */ |
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255 | public function setFolder(string $folder): self |
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261 | |||
262 | /** |
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263 | * Get path without slug. |
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264 | * |
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265 | * @return string|null |
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266 | */ |
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267 | public function getFolder(): ?string |
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271 | |||
272 | /** |
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273 | * Set slug. |
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274 | * |
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275 | * @param string $slug |
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276 | * |
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277 | * @return self |
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278 | */ |
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279 | public function setSlug(string $slug): self |
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285 | |||
286 | /** |
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287 | * Get slug. |
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288 | * |
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289 | * @return string |
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290 | */ |
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291 | public function getSlug(): string |
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300 | |||
301 | /** |
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302 | * Set path. |
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303 | * |
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304 | * @param string $path |
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305 | * |
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306 | * @return self |
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307 | */ |
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308 | public function setPath(string $path): self |
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333 | |||
334 | /** |
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335 | * Get path. |
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336 | * |
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337 | * @return string|null |
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338 | */ |
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339 | public function getPath(): ?string |
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350 | |||
351 | /** |
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352 | * @see getPath() |
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353 | * |
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354 | * @return string|null |
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355 | */ |
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356 | public function getPathname(): ?string |
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360 | |||
361 | /** |
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362 | * Set section. |
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363 | * |
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364 | * @param string $section |
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365 | * |
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366 | * @return self |
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367 | */ |
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368 | public function setSection(string $section): self |
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374 | |||
375 | /** |
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376 | * Get section. |
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377 | * |
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378 | * @return string|null |
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379 | */ |
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380 | public function getSection(): ?string |
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388 | |||
389 | /** |
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390 | * Set body as HTML. |
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391 | * |
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392 | * @param string $html |
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393 | * |
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394 | * @return self |
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395 | */ |
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396 | public function setBodyHtml(string $html): self |
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402 | |||
403 | /** |
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404 | * Get body as HTML. |
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405 | * |
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406 | * @return string|null |
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407 | */ |
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408 | public function getBodyHtml(): ?string |
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412 | |||
413 | /** |
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414 | * @see getBodyHtml() |
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415 | * |
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416 | * @return string|null |
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417 | */ |
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418 | public function getContent(): ?string |
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422 | |||
423 | /** |
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424 | * Return output file. |
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425 | * |
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426 | * Use cases: |
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427 | * - default: path + suffix + extension (ie: blog/post-1/index.html) |
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428 | * - subpath: path + subpath + suffix + extension (ie: blog/post-1/amp/index.html) |
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429 | * - ugly: path + extension (ie: 404.html, sitemap.xml, robots.txt) |
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430 | * - path only (ie: _redirects) |
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431 | * |
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432 | * @param string $format |
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433 | * @param Config $config |
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434 | * |
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435 | * @return string |
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436 | */ |
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437 | public function getOutputFile(string $format, Config $config = null): string |
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472 | |||
473 | /** |
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474 | * Return URL. |
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475 | * |
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476 | * @param string $format |
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477 | * @param Config $config |
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478 | * |
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479 | * @return string |
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480 | */ |
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481 | public function getUrl(string $format = 'html', Config $config = null): string |
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492 | |||
493 | /* |
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494 | * Helper to set and get variables. |
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495 | */ |
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496 | |||
497 | /** |
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498 | * Set an array as variables. |
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499 | * |
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500 | * @param array $variables |
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501 | * |
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502 | * @throws \Exception |
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503 | * |
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504 | * @return $this |
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505 | */ |
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506 | public function setVariables($variables) |
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517 | |||
518 | /** |
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519 | * Get all variables. |
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520 | * |
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521 | * @return array |
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522 | */ |
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523 | public function getVariables(): array |
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527 | |||
528 | /** |
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529 | * Set a variable. |
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530 | * |
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531 | * @param $name |
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532 | * @param $value |
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533 | * |
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534 | * @throws \Exception |
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535 | * |
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536 | * @return $this |
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537 | */ |
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538 | public function setVariable($name, $value) |
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594 | |||
595 | /** |
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596 | * Is variable exist? |
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597 | * |
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598 | * @param string $name |
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599 | * |
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600 | * @return bool |
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601 | */ |
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602 | public function hasVariable(string $name): bool |
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606 | |||
607 | /** |
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608 | * Get a variable. |
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609 | * |
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610 | * @param string $name |
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611 | * |
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612 | * @return mixed|null |
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613 | */ |
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614 | public function getVariable(string $name) |
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620 | |||
621 | /** |
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622 | * Unset a variable. |
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623 | * |
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624 | * @param string $name |
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625 | * |
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626 | * @return $this |
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627 | */ |
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628 | public function unVariable(string $name): self |
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636 | } |
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637 |