Complex classes like OrderProcessQueue 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 OrderProcessQueue, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 8 | class OrderProcessQueue extends DataObject |
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| 9 | { |
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| 10 | private static $db = array( |
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| 11 | 'DeferTimeInSeconds' => 'Int', |
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| 12 | 'InProcess' => 'Boolean', |
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| 13 | 'ProcessAttempts' => 'Int' |
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| 14 | ); |
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| 15 | |||
| 16 | private static $has_one = array( |
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| 17 | 'Order' => 'Order', |
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| 18 | 'OrderStep' => 'OrderStep' |
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| 19 | ); |
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| 20 | |||
| 21 | private static $indexes = array( |
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| 22 | 'DeferTimeInSeconds' => true, |
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| 23 | 'ProcessAttempts' => true |
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| 24 | ); |
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| 25 | |||
| 26 | private static $casting = array( |
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| 27 | 'ToBeProcessedAt' => 'SS_Datetime', |
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| 28 | 'HasBeenInQueueSince' => 'SS_Datetime' |
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| 29 | ); |
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| 30 | |||
| 31 | private static $default_sort = [ |
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| 32 | 'ID' => 'DESC' |
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| 33 | ]; |
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| 34 | |||
| 35 | /** |
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| 36 | * standard SS variable. |
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| 37 | * |
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| 38 | * @var array |
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| 39 | */ |
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| 40 | private static $summary_fields = array( |
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| 41 | 'Order.Title' => 'Order', |
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| 42 | 'Order.Status.Title' => 'Current Step', |
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| 43 | 'ProcessAttempts' => 'Attempts', |
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| 44 | 'ToBeProcessedAt.Nice' => 'To be processed at', |
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| 45 | 'ToBeProcessedAt.Ago' => 'That is ...', |
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| 46 | 'HasBeenInQueueForSince.Nice' => 'Added to queue ...', |
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| 47 | 'InProcess.Nice' => 'Currently Running' |
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| 48 | ); |
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| 49 | |||
| 50 | /** |
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| 51 | * standard SS variable. |
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| 52 | * |
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| 53 | * @var array |
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| 54 | */ |
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| 55 | private static $searchable_fields = array( |
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| 56 | 'OrderID' => array( |
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| 57 | 'field' => 'NumericField', |
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| 58 | 'title' => 'Order Number', |
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| 59 | ) |
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| 60 | ); |
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| 61 | |||
| 62 | |||
| 63 | /** |
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| 64 | * Standard SS method. |
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| 65 | * |
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| 66 | * @param Member $member |
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| 67 | * |
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| 68 | * @return bool |
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| 69 | */ |
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| 70 | public function canCreate($member = null) |
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| 74 | |||
| 75 | /** |
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| 76 | * Standard SS method. |
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| 77 | * |
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| 78 | * @param Member $member |
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| 79 | * |
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| 80 | * @return bool |
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| 81 | */ |
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| 82 | public function canView($member = null) |
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| 101 | |||
| 102 | /** |
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| 103 | * Standard SS method. |
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| 104 | * |
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| 105 | * @param Member $member |
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| 106 | * |
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| 107 | * @return bool |
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| 108 | */ |
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| 109 | public function canEdit($member = null) |
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| 113 | |||
| 114 | /** |
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| 115 | * Standard SS method |
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| 116 | * Queues can be deleted if needed. |
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| 117 | * |
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| 118 | * @param Member $member |
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| 119 | * |
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| 120 | * @return bool |
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| 121 | */ |
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| 122 | public function canDelete($member = null) |
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| 126 | |||
| 127 | /** |
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| 128 | * standard SS variable. |
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| 129 | * |
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| 130 | * @var string |
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| 131 | */ |
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| 132 | private static $singular_name = 'Order To Be Processed'; |
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| 133 | public function i18n_singular_name() |
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| 137 | |||
| 138 | /** |
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| 139 | * standard SS variable. |
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| 140 | * |
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| 141 | * @var string |
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| 142 | */ |
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| 143 | private static $plural_name = 'Orders to be Processed'; |
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| 144 | public function i18n_plural_name() |
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| 148 | |||
| 149 | |||
| 150 | /** |
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| 151 | * META METHOD: Add an order to the job list if it does not exist already. |
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| 152 | * |
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| 153 | * @param Order $order |
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| 154 | * @param Int $deferInSeconds |
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| 155 | */ |
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| 156 | public function AddOrderToQueue($order, $deferTimeInSeconds) |
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| 182 | |||
| 183 | /** |
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| 184 | * META METHOD |
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| 185 | * processes the order ... |
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| 186 | * returns TRUE if SUCCESSFUL and a message if unsuccessful ... |
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| 187 | * |
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| 188 | * |
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| 189 | * @param Order $order optional |
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| 190 | * @return boolean | string |
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| 191 | */ |
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| 192 | public function process($order = null) |
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| 252 | |||
| 253 | /** |
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| 254 | * META METHOD: returns the queue object if it exists |
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| 255 | * |
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| 256 | * @param Order $order |
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| 257 | * |
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| 258 | * @return null | OrderProcessQueue |
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| 259 | */ |
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| 260 | public function getQueueObject($order) |
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| 266 | |||
| 267 | /** |
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| 268 | * META METHOD: Once you are done, you can remove the item like this ... |
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| 269 | * |
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| 270 | * @param Order $order |
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| 271 | */ |
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| 272 | public function removeOrderFromQueue($order) |
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| 279 | |||
| 280 | /** |
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| 281 | * META METHOD: returns a list of orders to be processed |
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| 282 | * @param int $id force this Order to be processed |
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| 283 | * @param int $limit total number of orders that can be retrieved at any one time |
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| 284 | * |
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| 285 | * @return DataList (of orders) |
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| 286 | */ |
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| 287 | public function OrdersToBeProcessed($id = 0, $limit = 9999) |
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| 312 | |||
| 313 | /** |
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| 314 | * META METHOD: all orders with a queue object |
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| 315 | * @param int $id force this Order to be processed |
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| 316 | * @param int $limit total number of orders that can be retrieved at any one time |
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| 317 | * |
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| 318 | * @return DataList (of orders) |
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| 319 | */ |
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| 320 | public function AllOrdersInQueue($limit = 9999) |
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| 329 | |||
| 330 | /** |
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| 331 | * META METHOD: returns a list of orders NOT YET to be processed |
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| 332 | * @param int $limit total number of orders that can be retrieved at any one time |
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| 333 | * |
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| 334 | * @return DataList (of orders) |
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| 335 | */ |
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| 336 | public function OrdersInQueueThatAreNotReady($limit = 9999) |
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| 359 | |||
| 360 | /** |
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| 361 | * non-database method of working out if an Order is ready to go. |
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| 362 | * |
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| 363 | * @return bool |
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| 364 | */ |
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| 365 | public function isReadyToGo() |
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| 369 | |||
| 370 | /** |
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| 371 | * |
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| 372 | * casted variable |
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| 373 | * @return SS_DateTime |
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| 374 | */ |
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| 375 | public function ToBeProcessedAt() |
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| 379 | |||
| 380 | /** |
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| 381 | * |
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| 382 | * casted variable |
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| 383 | * @return SS_DateTime |
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| 384 | */ |
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| 385 | public function getToBeProcessedAt() |
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| 389 | |||
| 390 | |||
| 391 | /** |
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| 392 | * |
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| 393 | * casted variable |
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| 394 | * @return SS_DateTime |
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| 395 | */ |
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| 396 | public function HasBeenInQueueForSince() |
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| 400 | |||
| 401 | /** |
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| 402 | * |
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| 403 | * casted variable |
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| 404 | * @return SS_DateTime |
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| 405 | */ |
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| 406 | public function getHasBeenInQueueForSince() |
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| 410 | |||
| 411 | |||
| 412 | /** |
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| 413 | * CMS Fields |
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| 414 | * @return FieldList |
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| 415 | */ |
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| 416 | public function getCMSFields() |
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| 460 | |||
| 461 | public function requireDefaultRecords() |
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| 470 | |||
| 471 | protected function sortPhrase() |
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| 478 | |||
| 479 | /** |
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| 480 | * sort phrase for orders, based in order IDs... |
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| 481 | * @param array $orderIds |
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| 482 | * @return string |
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| 483 | */ |
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| 484 | protected function sortPhraseForOrderIDs($orderIDs) |
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| 488 | |||
| 489 | } |
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| 490 |
You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.