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 InternationalForms 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 InternationalForms, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 10 | class InternationalForms implements NodeInterface |
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| 11 | { |
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| 12 | /** |
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| 13 | * @var string |
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| 14 | */ |
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| 15 | private $type = self::TYPE_INVOICE; |
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| 16 | |||
| 17 | /** |
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| 18 | * Form Types. |
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| 19 | */ |
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| 20 | const TYPE_INVOICE = '01'; |
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| 21 | const TYPE_CO = '03'; |
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| 22 | const TYPE_NAFTA_CO = '04'; |
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| 23 | const TYPE_PARTIAL_INVOICE = '05'; |
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| 24 | const TYPE_PACKINGLIST = '06'; |
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| 25 | const TYPE_CUSTOMER_GENERATED_FORMS = '07'; |
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| 26 | const TYPE_AIR_FREIGHT_PACKING_LIST = '08'; |
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| 27 | const TYPE_CN22_FORMS = '09'; |
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| 28 | const TYPE_UPS_PREMIUM_CARE = '10'; |
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| 29 | const TYPE_EEI_SHIPMENT_WITH_RETURN_SERVICE = '11'; |
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| 30 | |||
| 31 | private static $typeNames = [ |
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| 32 | '01' => 'Invoice', |
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| 33 | '03' => 'CO', |
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| 34 | '04' => 'NAFTA CO', |
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| 35 | '05' => 'Partial Invoice', |
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| 36 | '06' => 'Packinglist', |
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| 37 | '07' => 'Customer Generated Forms', |
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| 38 | '08' => 'Air Freight Packing List', |
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| 39 | '09' => 'CN22 Forms', |
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| 40 | '10' => 'UPS Premium Care', |
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| 41 | '11' => 'EEI. For shipment with return service', |
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| 42 | ]; |
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| 43 | |||
| 44 | /** |
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| 45 | * @var string |
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| 46 | */ |
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| 47 | private $termsOfShipment; |
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| 48 | |||
| 49 | /** |
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| 50 | * Terms of Shipment. |
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| 51 | */ |
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| 52 | const TOS_COST_AND_FREIGHT = 'CFR'; |
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| 53 | const TOS_COST_INSURANCE_AND_FREIGHT = 'CIF'; |
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| 54 | const TOS_CARRIAGE_AND_INSURANCE_PAID = 'CIP'; |
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| 55 | const TOS_CARRIAGE_PAID_TO = 'CPT'; |
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| 56 | const TOS_DELIVERED_AT_FRONTIER = 'DAF'; |
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| 57 | const TOS_DELIVERY_DUTY_PAID = 'DDP'; |
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| 58 | const TOS_DELIVERY_DUTY_UNPAID = 'DDU'; |
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| 59 | const TOS_DELIVERED_EX_QUAY = 'DEQ'; |
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| 60 | const TOS_DELIVERED_EX_SHIP = 'DES'; |
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| 61 | const TOS_EX_WORKS = 'EXW'; |
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| 62 | const TOS_FREE_ALONGSIDE_SHIP = 'FAS'; |
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| 63 | const TOS_FREE_CARRIER = 'FCA'; |
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| 64 | const TOS_FREE_ON_BOARD = 'FOB'; |
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| 65 | |||
| 66 | private static $termsOfShipmentNames = [ |
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| 67 | 'CFR' => 'Cost and Freight', |
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| 68 | 'CIF' => 'Cost, Insurance and Freight', |
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| 69 | 'CIP' => 'Carriage and Insurance Paid', |
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| 70 | 'CPT' => 'Carriage Paid To', |
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| 71 | 'DAF' => 'Delivered at Frontier', |
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| 72 | 'DDP' => 'Delivery Duty Paid', |
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| 73 | 'DDU' => 'Delivery Duty Unpaid', |
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| 74 | 'DEQ' => 'Delivered Ex Quay', |
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| 75 | 'DES' => 'Delivered Ex Ship', |
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| 76 | 'EXW' => 'Ex Works', |
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| 77 | 'FAS' => 'Free Alongside Ship', |
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| 78 | 'FCA' => 'Free Carrier', |
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| 79 | 'FOB' => 'Free On Board', |
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| 80 | ]; |
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| 81 | |||
| 82 | /** |
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| 83 | * @var string |
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| 84 | */ |
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| 85 | private $reasonForExport; |
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| 86 | |||
| 87 | /** |
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| 88 | * Reasons for export. |
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| 89 | */ |
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| 90 | const RFE_SALE = 'SALE'; |
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| 91 | const RFE_GIFT = 'GIFT'; |
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| 92 | const RFE_SAMPLE = 'SAMPLE'; |
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| 93 | const RFE_RETURN = 'RETURN'; |
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| 94 | const RFE_REPAIR = 'REPAIR'; |
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| 95 | const RFE_INTERCOMPANYDATA = 'INTERCOMPANYDATA'; |
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| 96 | |||
| 97 | /** |
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| 98 | * @var string |
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| 99 | */ |
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| 100 | private $comments; |
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| 101 | |||
| 102 | /** |
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| 103 | * @var string |
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| 104 | */ |
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| 105 | private $declarationStatement; |
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| 106 | |||
| 107 | /** |
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| 108 | * @var string |
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| 109 | */ |
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| 110 | private $currencyCode; |
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| 111 | |||
| 112 | /** |
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| 113 | * @var string |
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| 114 | */ |
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| 115 | private $invoiceNumber; |
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| 116 | |||
| 117 | /** |
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| 118 | * @var DateTime |
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| 119 | */ |
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| 120 | private $invoiceDate; |
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| 121 | |||
| 122 | /** |
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| 123 | * @var string |
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| 124 | */ |
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| 125 | private $purchaseOrderNumber; |
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| 126 | |||
| 127 | /** |
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| 128 | * @var array |
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| 129 | */ |
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| 130 | private $products = []; |
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| 131 | |||
| 132 | /** |
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| 133 | * @var Discount |
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| 134 | */ |
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| 135 | private $discount; |
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| 136 | |||
| 137 | /** |
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| 138 | * @var FreightCharges |
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| 139 | */ |
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| 140 | private $freightCharges; |
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| 141 | |||
| 142 | /** |
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| 143 | * @var bool |
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| 144 | */ |
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| 145 | private $additionalDocumentIndicator; |
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| 146 | |||
| 147 | /** |
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| 148 | * @var EEIFilingOption |
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| 149 | */ |
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| 150 | private $eeiFilingOption; |
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| 151 | |||
| 152 | /** |
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| 153 | * @return array |
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| 154 | */ |
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| 155 | public static function getTypes() |
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| 159 | |||
| 160 | /** |
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| 161 | * @return string |
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| 162 | */ |
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| 163 | public function getTypeName() |
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| 167 | |||
| 168 | /** |
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| 169 | * @param null|object $attributes |
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| 170 | */ |
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| 171 | 4 | public function __construct($attributes = null) |
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| 203 | |||
| 204 | /** |
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| 205 | * @param $type string |
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| 206 | * |
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| 207 | * @return $this |
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| 208 | */ |
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| 209 | public function setType($type) |
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| 215 | |||
| 216 | /** |
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| 217 | * @return string |
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| 218 | */ |
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| 219 | 2 | public function getType() |
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| 223 | |||
| 224 | /** |
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| 225 | * @param $freightCharges FreightCharges |
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| 226 | * |
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| 227 | * @return $this |
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| 228 | */ |
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| 229 | public function setFreightCharges(FreightCharges $freightCharges) |
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| 235 | |||
| 236 | /** |
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| 237 | * @return FreightCharges |
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| 238 | */ |
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| 239 | 2 | public function getFreightCharges() |
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| 243 | |||
| 244 | /** |
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| 245 | * @param $discount Discount |
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| 246 | * |
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| 247 | * @return $this |
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| 248 | */ |
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| 249 | public function setDiscount(Discount $discount) |
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| 255 | |||
| 256 | /** |
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| 257 | * @return Discount |
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| 258 | */ |
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| 259 | 2 | public function getDiscount() |
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| 263 | |||
| 264 | /** |
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| 265 | * @param Product $product |
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| 266 | * |
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| 267 | * @return $this |
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| 268 | */ |
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| 269 | public function addProduct(Product $product) |
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| 275 | |||
| 276 | /** |
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| 277 | * @return array |
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| 278 | */ |
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| 279 | public function getProducts() |
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| 283 | |||
| 284 | /** |
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| 285 | * @param null|DOMDocument $document |
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| 286 | * |
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| 287 | * @return DOMElement |
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| 288 | */ |
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| 289 | 2 | public function toNode(DOMDocument $document = null) |
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| 342 | |||
| 343 | /** |
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| 344 | * @param $number string |
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| 345 | * |
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| 346 | * @return $this |
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| 347 | */ |
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| 348 | public function setInvoiceNumber($number) |
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| 354 | |||
| 355 | /** |
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| 356 | * @return string |
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| 357 | */ |
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| 358 | 2 | public function getInvoiceNumber() |
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| 362 | |||
| 363 | /** |
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| 364 | * @param DateTime $date |
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| 365 | * |
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| 366 | * @return $this |
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| 367 | */ |
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| 368 | public function setInvoiceDate(DateTime $date) |
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| 374 | |||
| 375 | /** |
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| 376 | * @return DateTime |
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| 377 | */ |
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| 378 | 2 | public function getInvoiceDate() |
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| 382 | |||
| 383 | /** |
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| 384 | * @param $number |
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| 385 | * |
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| 386 | * @return $this |
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| 387 | */ |
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| 388 | public function setPurchaseOrderNumber($number) |
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| 394 | |||
| 395 | /** |
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| 396 | * @return string |
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| 397 | */ |
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| 398 | 2 | public function getPurchaseOrderNumber() |
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| 402 | |||
| 403 | /** |
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| 404 | * @param $terms |
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| 405 | * |
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| 406 | * @return $this |
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| 407 | */ |
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| 408 | public function setTermsOfShipment($terms) |
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| 414 | |||
| 415 | /** |
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| 416 | * @return string |
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| 417 | */ |
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| 418 | 2 | public function getTermsOfShipment() |
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| 422 | |||
| 423 | /** |
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| 424 | * @param $reason |
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| 425 | * |
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| 426 | * @return $this |
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| 427 | */ |
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| 428 | public function setReasonForExport($reason) |
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| 438 | |||
| 439 | /** |
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| 440 | * @return string |
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| 441 | */ |
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| 442 | 2 | public function getReasonForExport() |
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| 446 | |||
| 447 | /** |
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| 448 | * @param $comments |
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| 449 | * |
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| 450 | * @return $this |
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| 451 | */ |
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| 452 | View Code Duplication | public function setComments($comments) |
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| 462 | |||
| 463 | /** |
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| 464 | * @return string |
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| 465 | */ |
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| 466 | 2 | public function getComments() |
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| 470 | |||
| 471 | /** |
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| 472 | * @param string $statement |
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| 473 | * |
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| 474 | * @return $this |
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| 475 | */ |
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| 476 | public function setDeclarationStatement($statement) |
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| 482 | |||
| 483 | /** |
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| 484 | * @return string |
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| 485 | */ |
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| 486 | 2 | public function getDeclarationStatement() |
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| 490 | |||
| 491 | /** |
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| 492 | * @param $code |
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| 493 | * |
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| 494 | * @return $this |
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| 495 | */ |
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| 496 | public function setCurrencyCode($code) |
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| 502 | |||
| 503 | /** |
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| 504 | * @return string |
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| 505 | */ |
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| 506 | 2 | public function getCurrencyCode() |
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| 510 | |||
| 511 | /** |
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| 512 | * @param $additionalDocumentIndicator |
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| 513 | * |
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| 514 | * @return $this |
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| 515 | */ |
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| 516 | public function setAdditionalDocumentIndicator($additionalDocumentIndicator) |
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| 520 | |||
| 521 | /** |
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| 522 | * @return bool |
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| 523 | */ |
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| 524 | 2 | public function getAdditionalDocumentIndicator() |
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| 528 | |||
| 529 | /** |
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| 530 | * @param EEIFilingOption $eeiFilingOption |
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| 531 | * |
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| 532 | * @return $this |
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| 533 | */ |
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| 534 | 3 | public function setEEIFilingOption(EEIFilingOption $eeiFilingOption) |
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| 540 | |||
| 541 | /** |
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| 542 | * @return EEIFilingOption |
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| 543 | */ |
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| 544 | 4 | public function getEEIFilingOption() |
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| 548 | } |
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| 549 |
This check marks private properties in classes that are never used. Those properties can be removed.