Complex classes like Prestashop 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 Prestashop, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 9 | class Prestashop implements MessageComponentInterface |
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| 10 | { |
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| 11 | protected $clients; |
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| 12 | protected $dbConn; |
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| 13 | |||
| 14 | public function __construct() |
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| 27 | |||
| 28 | public function onOpen(ConnectionInterface $conn) |
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| 35 | |||
| 36 | public function onMessage(ConnectionInterface $from, $msg) |
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| 58 | |||
| 59 | /** |
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| 60 | * @param string $data |
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| 61 | */ |
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| 62 | private function getCombinationData($data) { |
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| 78 | |||
| 79 | /** |
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| 80 | * @param string $data |
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| 81 | */ |
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| 82 | private function getProductData($data) { |
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| 83 | $category = (int) substr($data, 0, strpos($data, ',')); |
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| 84 | if ($category != 0) { |
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| 85 | $products = $this->getProducts($category); |
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| 86 | } else { |
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| 87 | $product = substr($data, strpos($data, ',') + 1); |
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| 88 | $products = $this->getProducts($product); |
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| 89 | } |
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| 90 | Analog::log("Product variables: $data"); |
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| 91 | return $products; |
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| 92 | } |
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| 93 | |||
| 94 | /** |
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| 95 | * @param string $data |
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| 96 | */ |
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| 97 | private function getCartData($data) { |
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| 98 | $cart = substr($data, 0, strpos($data, ',')); |
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| 99 | $cust = substr($data, strpos($data, ',') + 1); |
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| 100 | |||
| 101 | Analog::log("Cart & customer variables: $data"); |
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| 102 | $otherCarts = $this->processFindCarts($cart, $cust); |
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| 103 | return $otherCarts; |
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| 104 | } |
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| 105 | |||
| 106 | |||
| 107 | /** |
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| 108 | * @param string $cart |
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| 109 | * @param string $cust |
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| 110 | */ |
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| 111 | private function processFindCarts($cart, $cust) |
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| 112 | { |
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| 113 | $sql = 'SELECT DISTINCT pc.id_cart as id, DATE_FORMAT(pc.date_upd,"%a %D %b %Y, %l:%i %p") as timer from '._DB_PREFIX_.'cart as pc |
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| 114 | LEFT JOIN '._DB_PREFIX_.'cart_product as pcp on pcp.id_cart = pc.id_cart |
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| 115 | WHERE pc.id_cart NOT IN (SELECT po.id_cart FROM '._DB_PREFIX_.'orders as po) |
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| 116 | AND pcp.id_product IS NOT NULL |
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| 117 | AND pc.id_customer = '.(int) $cust.' |
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| 118 | AND pc.id_cart != '.(int) $cart.' |
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| 119 | ORDER BY pc.date_upd DESC |
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| 120 | LIMIT 10'; |
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| 121 | if ($results = $this->dbConn->fetchRowMany($sql)) { |
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| 122 | foreach ($results as &$row) { |
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| 123 | $row['token'] = md5(_COOKIE_KEY_.'recover_cart_'.$row['id']); |
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| 124 | } |
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| 125 | |||
| 126 | return $results; |
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| 127 | } else { |
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| 128 | return; |
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| 129 | } |
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| 130 | } |
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| 131 | |||
| 132 | |||
| 133 | /** |
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| 134 | * @param string $product |
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| 135 | */ |
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| 136 | private function getAttribute($product, $choices) |
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| 137 | { |
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| 138 | $sql = 'SELECT pac.id_product_attribute from '._DB_PREFIX_.'product_attribute_combination as pac |
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| 139 | LEFT JOIN '._DB_PREFIX_.'product_attribute as ppa on ppa.id_product_attribute = pac.id_product_attribute |
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| 140 | LEFT JOIN '._DB_PREFIX_.'attribute a ON (a.id_attribute = pac.id_attribute) |
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| 141 | WHERE ppa.id_product = '.$product; |
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| 142 | foreach ($choices as $value) { |
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| 143 | $sql .= ' AND pac.id_product_attribute IN |
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| 144 | ( SELECT pac.id_product_attribute from '._DB_PREFIX_.'product_attribute_combination as pac |
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| 145 | WHERE pac.id_attribute = '.(int) $value.') '; |
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| 146 | } |
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| 147 | $sql .= ' GROUP BY pac.id_product_attribute'; |
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| 148 | $id_product_attribute = $this->dbConn->fetchColumn($sql); |
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| 149 | |||
| 150 | return $id_product_attribute; |
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| 151 | } |
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| 152 | |||
| 153 | /** |
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| 154 | * @param null|string $id_product_attribute |
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| 155 | */ |
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| 156 | private function buildAttributes($combinations, $id_product_attribute, $row) |
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| 157 | { |
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| 158 | $combinationSet = array(); |
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| 159 | $specific_price = null; |
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| 160 | |||
| 161 | $combinations['id_product'] = (int) $row['id_product']; |
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| 162 | $combinations['name'] = $row['product_name']; |
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| 163 | $combinations['attributes_values'][$row['id_attribute_group']] = $row['attribute_name']; |
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| 164 | $combinations['attributes'][] = (int) $row['id_attribute']; |
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| 165 | $combinations['base_price'] = (float) $row['base_price']; |
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| 166 | $combinations['price'] = (float) $row['price']; |
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| 167 | |||
| 168 | list ($combinationSet[(int) $row['id_product_attribute']], $combinations['specific_price']) = $this->getCombinationSpecificPrice($combinationSet, $row, $id_product_attribute); |
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| 169 | |||
| 170 | $combinations['ecotax'] = (float) $row['ecotax']; |
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| 171 | $combinations['weight'] = (float) $row['weight']; |
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| 172 | $combinations['quantity'] = (int) $row['quantity']; |
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| 173 | $combinations['reference'] = $row['reference']; |
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| 174 | $combinations['unit_impact'] = $row['unit_price_impact']; |
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| 175 | $combinations['minimal_quantity'] = $row['minimal_quantity']; |
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| 176 | $combinations['available_date'] = $this->getAvailableDate($row); |
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| 177 | $combinations['image'] = $this->getComboImage($id_product_attribute); |
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| 178 | $combinations['final_price'] = $this->getFinalPrice($row, $specific_price); |
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| 179 | |||
| 180 | return $combinations; |
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| 181 | } |
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| 182 | |||
| 183 | private function getFinalPrice($row, $specific_price) |
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| 184 | { |
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| 185 | if ($specific_price['price'] != 0) { |
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| 186 | $final_price = (((float) $row['base_price'] + (float) $row['price']) * (((int) 100 - $specific_price['reduction_percent']) / 100)); |
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| 187 | } else { |
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| 188 | $final_price = (float) $row['base_price'] + (float) $row['price']; |
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| 189 | } |
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| 190 | |||
| 191 | return $final_price; |
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| 192 | } |
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| 193 | |||
| 194 | |||
| 195 | private function getAvailableDate($row) { |
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| 196 | if ($row['available_date'] != '0000-00-00') { |
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| 197 | return $row['available_date']; |
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| 198 | } else { |
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| 199 | return ''; |
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| 200 | } |
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| 201 | |||
| 202 | } |
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| 203 | |||
| 204 | /** |
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| 205 | * @param null|string $id_product_attribute |
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| 206 | */ |
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| 207 | private function getCombinationSpecificPrice($combinationSet, $row, $id_product_attribute) { |
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| 208 | // Call getSpecificPrice in order to set $combination_specific_price |
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| 209 | if (!isset($combinationSet[(int) $row['id_product_attribute']])) { |
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| 210 | $specific_price = $this->getSpecificPrice($id_product_attribute, $row['id_product']); |
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| 211 | $combinationSet[(int) $row['id_product_attribute']] = true; |
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| 212 | return array($combinationSet, $specific_price); |
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| 213 | } else { |
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| 214 | return array(false, null); |
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| 215 | } |
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| 216 | } |
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| 217 | |||
| 218 | |||
| 219 | |||
| 220 | /** |
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| 221 | * @param null|string $id_product_attribute |
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| 222 | */ |
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| 223 | private function getCombination($id_product_attribute) |
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| 224 | { |
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| 225 | $sql = 'SELECT ag.id_attribute_group, ag.is_color_group, agl.name AS group_name, agl.public_name AS public_group_name, |
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| 226 | a.id_attribute, al.name AS attribute_name, a.color AS attribute_color, pas.id_product_attribute, |
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| 227 | IFNULL(stock.quantity, 0) as quantity, pas.price, pas.ecotax, pas.weight, |
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| 228 | pas.default_on, pa.reference, pas.unit_price_impact, |
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| 229 | pas.minimal_quantity, pas.available_date, ag.group_type |
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| 230 | FROM '._DB_PREFIX_.'product_attribute pa |
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| 231 | INNER JOIN '._DB_PREFIX_.'product_attribute_shop pas |
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| 232 | ON (pas.id_product_attribute = pa.id_product_attribute AND pas.id_shop = 1) |
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| 233 | LEFT JOIN '._DB_PREFIX_.'stock_available stock |
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| 234 | ON (stock.id_product = pa.id_product AND stock.id_product_attribute = IFNULL(pa.id_product_attribute, 0) AND stock.id_shop = 1 ) |
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| 235 | LEFT JOIN '._DB_PREFIX_.'product_attribute_combination pac ON (pac.id_product_attribute = pa.id_product_attribute) |
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| 236 | LEFT JOIN '._DB_PREFIX_.'attribute a ON (a.id_attribute = pac.id_attribute) |
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| 237 | LEFT JOIN '._DB_PREFIX_.'attribute_group ag ON (ag.id_attribute_group = a.id_attribute_group) |
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| 238 | LEFT JOIN '._DB_PREFIX_.'attribute_lang al ON (a.id_attribute = al.id_attribute) |
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| 239 | LEFT JOIN '._DB_PREFIX_.'attribute_group_lang agl ON (ag.id_attribute_group = agl.id_attribute_group) |
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| 240 | INNER JOIN '._DB_PREFIX_.'attribute_shop attribute_shop |
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| 241 | ON (attribute_shop.id_attribute = a.id_attribute AND attribute_shop.id_shop = 1) |
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| 242 | WHERE pas.id_product_attribute= '.(int) $id_product_attribute.' |
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| 243 | GROUP BY id_attribute_group, id_product_attribute |
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| 244 | ORDER BY ag.position ASC, a.position ASC, agl.name ASC'; |
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| 245 | |||
| 246 | $combo_groups = $this->dbConn->fetchRowMany($sql); |
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| 247 | |||
| 248 | return $combo_groups; |
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| 249 | } |
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| 250 | |||
| 251 | /** |
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| 252 | * @param null|string $id_product_attribute |
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| 253 | * @param string $id_product |
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| 254 | */ |
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| 255 | private function getSpecificPrice($id_product_attribute, $id_product) |
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| 271 | |||
| 272 | |||
| 273 | /** |
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| 274 | * @param string $now |
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| 275 | * @param null|string $id_product_attribute |
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| 276 | * @param string $id_product |
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| 277 | */ |
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| 278 | private function getSpecificPriceData($id_product_attribute, $id_product, $now) |
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| 295 | |||
| 296 | /** |
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| 297 | * @param null|string $id_product_attribute |
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| 298 | * @param string $id_product |
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| 299 | */ |
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| 300 | private function getNumberSpecificPrice($id_product_attribute, $id_product) |
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| 311 | |||
| 312 | /** |
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| 313 | * @param null|string $id_product_attribute |
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| 314 | */ |
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| 315 | private function getComboImage($id_product_attribute) |
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| 329 | |||
| 330 | /** |
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| 331 | * @param string $category |
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| 332 | */ |
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| 333 | private function getProducts($category) |
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| 340 | |||
| 341 | /** |
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| 342 | * @param string $category |
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| 343 | */ |
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| 344 | private function getProductIDs($category) |
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| 365 | |||
| 366 | /** |
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| 367 | * @param string $ids |
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| 368 | */ |
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| 369 | private function getProduct($ids) |
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| 391 | |||
| 392 | |||
| 393 | public function onClose(ConnectionInterface $conn) |
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| 399 | |||
| 400 | public function onError(ConnectionInterface $conn, \Exception $e) |
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| 406 | } |
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| 407 |
It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: