AyeCode /
invoicing
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 WPInv_Subscription 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 WPInv_Subscription, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 14 | class WPInv_Subscription { |
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| 15 | |||
| 16 | private $subs_db; |
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| 17 | |||
| 18 | public $id = 0; |
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| 19 | public $customer_id = 0; |
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| 20 | public $period = ''; |
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| 21 | public $initial_amount = ''; |
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| 22 | public $recurring_amount = ''; |
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| 23 | public $bill_times = 0; |
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| 24 | public $transaction_id = ''; |
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| 25 | public $parent_payment_id = 0; |
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| 26 | public $product_id = 0; |
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| 27 | public $created = '0000-00-00 00:00:00'; |
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| 28 | public $expiration = '0000-00-00 00:00:00'; |
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| 29 | public $trial_period = ''; |
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| 30 | public $status = 'pending'; |
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| 31 | public $profile_id = ''; |
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| 32 | public $gateway = ''; |
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| 33 | public $customer; |
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| 34 | |||
| 35 | /** |
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| 36 | * Get us started |
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| 37 | * |
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| 38 | * @since 1.0.0 |
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| 39 | * @return void |
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| 40 | */ |
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| 41 | function __construct( $_id_or_object = 0, $_by_profile_id = false ) { |
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| 59 | |||
| 60 | /** |
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| 61 | * Setup the subscription object |
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| 62 | * |
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| 63 | * @since 1.0.0 |
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| 64 | * @return void |
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| 65 | */ |
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| 66 | private function setup_subscription( $id_or_object = 0 ) { |
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| 97 | |||
| 98 | /** |
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| 99 | * Magic __get function to dispatch a call to retrieve a private property |
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| 100 | * |
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| 101 | * @since 1.0.0 |
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| 102 | */ |
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| 103 | View Code Duplication | public function __get( $key ) { |
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| 116 | |||
| 117 | /** |
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| 118 | * Creates a subscription |
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| 119 | * |
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| 120 | * @since 1.0.0 |
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| 121 | * @param array $data Array of attributes for a subscription |
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| 122 | * @return mixed false if data isn't passed and class not instantiated for creation |
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| 123 | */ |
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| 124 | public function create( $data = array() ) { |
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| 125 | |||
| 126 | if ( $this->id != 0 ) { |
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| 127 | return false; |
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| 128 | } |
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| 129 | |||
| 130 | $defaults = array( |
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| 131 | 'customer_id' => 0, |
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| 132 | 'frequency' => '', |
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| 133 | 'period' => '', |
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| 134 | 'initial_amount' => '', |
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| 135 | 'recurring_amount' => '', |
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| 136 | 'bill_times' => 0, |
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| 137 | 'parent_payment_id' => 0, |
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| 138 | 'product_id' => 0, |
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| 139 | 'created' => '', |
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| 140 | 'expiration' => '', |
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| 141 | 'status' => '', |
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| 142 | 'profile_id' => '', |
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| 143 | ); |
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| 144 | |||
| 145 | $args = wp_parse_args( $data, $defaults ); |
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| 146 | |||
| 147 | if( $args['expiration'] && strtotime( 'NOW', current_time( 'timestamp' ) ) > strtotime( $args['expiration'], current_time( 'timestamp' ) ) ) { |
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| 148 | |||
| 149 | if( 'active' == $args['status'] || 'trialling' == $args['status'] ) { |
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| 150 | |||
| 151 | // Force an active subscription to expired if expiration date is in the past |
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| 152 | $args['status'] = 'expired'; |
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| 153 | |||
| 154 | } |
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| 155 | } |
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| 156 | |||
| 157 | do_action( 'wpinv_subscription_pre_create', $args ); |
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| 158 | |||
| 159 | $id = $this->subs_db->insert( $args, 'subscription' ); |
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| 160 | |||
| 161 | do_action( 'wpinv_subscription_post_create', $id, $args ); |
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| 162 | |||
| 163 | return $this->setup_subscription( $id ); |
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| 164 | |||
| 165 | } |
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| 166 | |||
| 167 | /** |
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| 168 | * Updates a subscription |
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| 169 | * |
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| 170 | * @since 1.0.0 |
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| 171 | * @param array $args Array of fields to update |
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| 172 | * @return bool |
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| 173 | */ |
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| 174 | public function update( $args = array() ) { |
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| 183 | |||
| 184 | /** |
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| 185 | * Delete the subscription |
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| 186 | * |
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| 187 | * @since 1.0.0 |
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| 188 | * @return bool |
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| 189 | */ |
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| 190 | public function delete() { |
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| 193 | |||
| 194 | /** |
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| 195 | * Retrieves the parent payment ID |
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| 196 | * |
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| 197 | * @since 1.0.0 |
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| 198 | * @return int |
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| 199 | */ |
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| 200 | public function get_original_payment_id() { |
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| 205 | |||
| 206 | /** |
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| 207 | * Retrieve renewal payments for a subscription |
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| 208 | * |
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| 209 | * @since 1.0.0 |
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| 210 | * @return array |
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| 211 | */ |
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| 212 | public function get_child_payments() { |
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| 224 | |||
| 225 | /** |
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| 226 | * Counts the number of payments made to the subscription |
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| 227 | * |
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| 228 | * @since 2.4 |
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| 229 | * @return int |
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| 230 | */ |
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| 231 | public function get_total_payments() { |
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| 240 | |||
| 241 | /** |
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| 242 | * Returns the number of times the subscription has been billed |
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| 243 | * |
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| 244 | * @since 2.6 |
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| 245 | * @return int |
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| 246 | */ |
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| 247 | public function get_times_billed() { |
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| 262 | |||
| 263 | /** |
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| 264 | * Records a new payment on the subscription |
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| 265 | * |
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| 266 | * @since 2.4 |
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| 267 | * @param array $args Array of values for the payment, including amount and transaction ID |
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| 268 | * @return bool |
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| 269 | */ |
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| 270 | public function add_payment( $args = array() ) { |
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| 298 | |||
| 299 | /** |
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| 300 | * Retrieves the transaction ID from the subscription |
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| 301 | * |
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| 302 | * @since 1.0.0 |
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| 303 | * @return bool |
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| 304 | */ |
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| 305 | public function get_transaction_id() { |
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| 320 | |||
| 321 | /** |
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| 322 | * Stores the transaction ID for the subscription purchase |
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| 323 | * |
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| 324 | * @since 1.0.0.4 |
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| 325 | * @return bool |
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| 326 | */ |
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| 327 | public function set_transaction_id( $txn_id = '' ) { |
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| 331 | |||
| 332 | /** |
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| 333 | * Renews a subscription |
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| 334 | * |
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| 335 | * @since 1.0.0 |
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| 336 | * @return bool |
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| 337 | */ |
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| 338 | public function renew() { |
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| 388 | |||
| 389 | /** |
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| 390 | * Marks a subscription as completed |
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| 391 | * |
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| 392 | * Subscription is completed when the number of payments matches the billing_times field |
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| 393 | * |
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| 394 | * @since 1.0.0 |
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| 395 | * @return void |
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| 396 | */ |
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| 397 | public function complete() { |
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| 417 | |||
| 418 | /** |
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| 419 | * Marks a subscription as expired |
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| 420 | * |
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| 421 | * Subscription is completed when the billing times is reached |
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| 422 | * |
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| 423 | * @since 1.0.0 |
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| 424 | * @param $check_expiration bool True if expiration date should be checked with merchant processor before expiring |
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| 425 | * @return void |
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| 426 | */ |
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| 427 | public function expire( $check_expiration = false ) { |
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| 455 | |||
| 456 | /** |
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| 457 | * Marks a subscription as failing |
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| 458 | * |
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| 459 | * @since 2.4.2 |
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| 460 | * @return void |
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| 461 | */ |
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| 462 | public function failing() { |
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| 478 | |||
| 479 | /** |
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| 480 | * Marks a subscription as cancelled |
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| 481 | * |
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| 482 | * @since 1.0.0 |
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| 483 | * @return void |
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| 484 | */ |
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| 485 | public function cancel() { |
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| 519 | |||
| 520 | /** |
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| 521 | * Determines if subscription can be cancelled |
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| 522 | * |
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| 523 | * This method is filtered by payment gateways in order to return true on subscriptions |
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| 524 | * that can be cancelled with a profile ID through the merchant processor |
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| 525 | * |
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| 526 | * @since 1.0.0 |
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| 527 | * @return bool |
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| 528 | */ |
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| 529 | public function can_cancel() { |
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| 536 | |||
| 537 | /** |
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| 538 | * Returns an array of subscription statuses that can be cancelled |
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| 539 | * |
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| 540 | * @access public |
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| 541 | * @since 1.0.0 |
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| 542 | * @return array |
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| 543 | */ |
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| 544 | public function get_cancellable_statuses() { |
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| 547 | |||
| 548 | /** |
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| 549 | * Retrieves the URL to cancel subscription |
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| 550 | * |
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| 551 | * @since 1.0.0 |
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| 552 | * @return string |
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| 553 | */ |
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| 554 | public function get_cancel_url() { |
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| 560 | |||
| 561 | /** |
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| 562 | * Determines if subscription can be manually renewed |
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| 563 | * |
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| 564 | * This method is filtered by payment gateways in order to return true on subscriptions |
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| 565 | * that can be renewed manually |
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| 566 | * |
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| 567 | * @since 2.5 |
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| 568 | * @return bool |
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| 569 | */ |
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| 570 | public function can_renew() { |
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| 574 | |||
| 575 | /** |
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| 576 | * Retrieves the URL to renew a subscription |
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| 577 | * |
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| 578 | * @since 2.5 |
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| 579 | * @return string |
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| 580 | */ |
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| 581 | public function get_renew_url() { |
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| 587 | |||
| 588 | /** |
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| 589 | * Determines if subscription can have their payment method updated |
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| 590 | * |
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| 591 | * @since 1.0.0 |
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| 592 | * @return bool |
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| 593 | */ |
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| 594 | public function can_update() { |
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| 597 | |||
| 598 | /** |
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| 599 | * Retrieves the URL to update subscription |
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| 600 | * |
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| 601 | * @since 1.0.0 |
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| 602 | * @return void |
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| 603 | */ |
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| 604 | public function get_update_url() { |
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| 610 | |||
| 611 | /** |
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| 612 | * Determines if subscription is active |
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| 613 | * |
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| 614 | * @since 1.0.0 |
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| 615 | * @return void |
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| 616 | */ |
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| 617 | public function is_active() { |
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| 628 | |||
| 629 | /** |
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| 630 | * Determines if subscription is expired |
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| 631 | * |
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| 632 | * @since 1.0.0 |
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| 633 | * @return void |
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| 634 | */ |
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| 635 | public function is_expired() { |
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| 661 | |||
| 662 | /** |
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| 663 | * Retrieves the expiration date |
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| 664 | * |
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| 665 | * @since 1.0.0 |
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| 666 | * @return string |
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| 667 | */ |
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| 668 | public function get_expiration() { |
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| 671 | |||
| 672 | /** |
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| 673 | * Retrieves the expiration date in a timestamp |
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| 674 | * |
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| 675 | * @since 1.0.0 |
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| 676 | * @return int |
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| 677 | */ |
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| 678 | public function get_expiration_time() { |
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| 681 | |||
| 682 | /** |
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| 683 | * Retrieves the subscription status |
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| 684 | * |
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| 685 | * @since 1.0.0 |
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| 686 | * @return int |
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| 687 | */ |
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| 688 | public function get_status() { |
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| 694 | |||
| 695 | /** |
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| 696 | * Retrieves the subscription status label |
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| 697 | * |
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| 698 | * @since 1.0.0 |
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| 699 | * @return int |
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| 700 | */ |
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| 701 | public function get_status_label() { |
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| 739 | |||
| 740 | /** |
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| 741 | * Retrieves the subscription status label |
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| 742 | * |
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| 743 | * @since 1.0.0 |
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| 744 | * @return int |
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| 745 | */ |
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| 746 | public function get_status_label_html() { |
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| 794 | |||
| 795 | /** |
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| 796 | * Determines if a payment exists with the specified transaction ID |
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| 797 | * |
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| 798 | * @since 2.4 |
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| 799 | * @param string $txn_id The transaction ID from the merchant processor |
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| 800 | * @return bool |
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| 801 | */ |
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| 802 | public function payment_exists( $txn_id = '' ) { |
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| 819 | |||
| 820 | } |
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| 821 |
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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.