Complex classes like OrderStatusLog 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 OrderStatusLog, and based on these observations, apply Extract Interface, too.
1 | <?php |
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11 | class OrderStatusLog extends DataObject implements EditableEcommerceObject |
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12 | { |
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13 | /** |
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14 | * standard SS variable. |
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15 | * |
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16 | * @var array |
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17 | */ |
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18 | private static $db = array( |
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19 | 'Title' => 'Varchar(100)', |
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20 | 'Note' => 'HTMLText', |
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21 | 'InternalUseOnly' => 'Boolean', |
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22 | ); |
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23 | |||
24 | /** |
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25 | * standard SS variable. |
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26 | * |
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27 | * @var array |
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28 | */ |
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29 | private static $has_one = array( |
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30 | 'Author' => 'Member', |
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31 | 'Order' => 'Order', |
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32 | ); |
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33 | |||
34 | /** |
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35 | * standard SS variable. |
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36 | * |
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37 | * @var array |
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38 | */ |
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39 | private static $casting = array( |
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40 | 'CustomerNote' => 'HTMLText', |
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41 | 'Type' => 'Varchar', |
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42 | 'InternalUseOnlyNice' => 'Varchar', |
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43 | ); |
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44 | |||
45 | /** |
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46 | * standard SS variable. |
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47 | * |
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48 | * @var array |
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49 | */ |
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50 | private static $summary_fields = array( |
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51 | 'Created' => 'Date', |
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52 | 'Order.Title' => 'Order', |
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53 | 'Type' => 'Type', |
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54 | 'Title' => 'Title', |
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55 | 'InternalUseOnlyNice' => 'Internal use only', |
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56 | ); |
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57 | |||
58 | /** |
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59 | * standard SS variable. |
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60 | * |
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61 | * @var array |
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62 | */ |
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63 | private static $defaults = array( |
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64 | 'InternalUseOnly' => true, |
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65 | ); |
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66 | |||
67 | /** |
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68 | * casted method. |
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69 | * |
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70 | * @return string |
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71 | */ |
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72 | public function InternalUseOnlyNice() |
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84 | |||
85 | /** |
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86 | * Standard SS method. |
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87 | * |
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88 | * @param Member $member |
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89 | * |
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90 | * @return bool |
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91 | */ |
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92 | public function canCreate($member = null) |
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111 | |||
112 | /** |
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113 | * Standard SS method. |
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114 | * |
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115 | * @param Member $member |
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116 | * |
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117 | * @return bool |
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118 | */ |
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119 | public function canView($member = null) |
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148 | |||
149 | /** |
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150 | * Standard SS method. |
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151 | * |
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152 | * @param Member $member |
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153 | * |
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154 | * @return bool |
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155 | */ |
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156 | public function canEdit($member = null) |
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181 | |||
182 | /** |
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183 | * Standard SS method |
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184 | * logs can never be deleted... |
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185 | * |
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186 | * @param Member $member |
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187 | * |
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188 | * @return bool |
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189 | */ |
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190 | public function canDelete($member = null) |
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202 | |||
203 | /** |
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204 | * standard SS variable. |
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205 | * |
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206 | * @var array |
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207 | */ |
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208 | private static $searchable_fields = array( |
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209 | 'OrderID' => array( |
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210 | 'field' => 'NumericField', |
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211 | 'title' => 'Order Number', |
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212 | ), |
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213 | 'ClassName' => array( |
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214 | 'title' => 'Type', |
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215 | 'filter' => 'ExactMatchFilter', |
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216 | ), |
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217 | 'Title' => 'PartialMatchFilter', |
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218 | 'Note' => 'PartialMatchFilter', |
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219 | ); |
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220 | |||
221 | /** |
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222 | * standard SS variable. |
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223 | * |
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224 | * @var string |
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225 | */ |
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226 | private static $singular_name = 'Order Log Entry'; |
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227 | public function i18n_singular_name() |
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231 | |||
232 | /** |
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233 | * standard SS variable. |
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234 | * |
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235 | * @var string |
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236 | */ |
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237 | private static $plural_name = 'Order Log Entries'; |
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238 | public function i18n_plural_name() |
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242 | |||
243 | /** |
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244 | * Standard SS variable. |
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245 | * |
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246 | * @var string |
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247 | */ |
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248 | private static $description = 'A record of anything that happened with an order.'; |
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249 | |||
250 | /** |
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251 | * standard SS variable. |
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252 | * |
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253 | * @var string |
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254 | */ |
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255 | private static $default_sort = [ |
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256 | 'ID' => 'DESC' |
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257 | ]; |
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258 | |||
259 | private static $indexes = [ |
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260 | 'Title' => true, |
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261 | 'InternalUseOnly' => true |
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262 | ]; |
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263 | |||
264 | /** |
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265 | * standard SS method. |
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266 | */ |
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267 | public function populateDefaults() |
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274 | |||
275 | /** |
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276 | *@return FieldList |
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277 | **/ |
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278 | public function getCMSFields() |
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350 | |||
351 | /** |
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352 | * when being created, can the user choose the type of log? |
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353 | * |
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354 | * |
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355 | * @return bool |
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356 | */ |
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357 | protected function limitedToOneClassName() |
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364 | |||
365 | /** |
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366 | * link to edit the record. |
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367 | * |
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368 | * @param string | Null $action - e.g. edit |
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369 | * |
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370 | * @return string |
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371 | */ |
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372 | public function CMSEditLink($action = null) |
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376 | |||
377 | /** |
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378 | * @return string |
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379 | **/ |
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380 | public function Type() |
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388 | |||
389 | /** |
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390 | * Determine which properties on the DataObject are |
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391 | * searchable, and map them to their default {@link FormField} |
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392 | * representations. Used for scaffolding a searchform for {@link ModelAdmin}. |
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393 | * |
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394 | * Some additional logic is included for switching field labels, based on |
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395 | * how generic or specific the field type is. |
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396 | * |
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397 | * Used by {@link SearchContext}. |
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398 | * |
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399 | * @param array $_params |
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400 | * 'fieldClasses': Associative array of field names as keys and FormField classes as values |
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401 | * 'restrictFields': Numeric array of a field name whitelist |
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402 | * |
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403 | * @return FieldList |
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404 | */ |
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405 | public function scaffoldSearchFields($_params = null) |
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417 | |||
418 | /** |
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419 | * standard SS method. |
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420 | */ |
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421 | public function onBeforeWrite() |
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442 | |||
443 | /** |
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444 | *@return string |
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445 | **/ |
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446 | public function CustomerNote() |
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454 | |||
455 | /** |
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456 | * returns the standard EcommerceDBConfig for use within OrderSteps. |
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457 | * |
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458 | * @return EcommerceDBConfig |
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459 | */ |
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460 | protected function EcomConfig() |
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464 | |||
465 | /** |
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466 | * Debug helper method. |
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467 | * Can be called from /shoppingcart/debug/. |
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468 | * |
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469 | * @return string |
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470 | */ |
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471 | public function debug() |
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475 | } |
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476 |