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:
| 1 | <?php |
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| 11 | class JsonApiParser extends JsonParser |
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| 12 | { |
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| 13 | /** |
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| 14 | * Converts 'type' member to form name |
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| 15 | * If not set, type will be converted to singular form. |
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| 16 | * For example, 'articles' will be converted to 'Article' |
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| 17 | * @var callable |
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| 18 | */ |
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| 19 | public $formNameCallback = ['tuyakhov\jsonapi\Inflector', 'type2form']; |
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| 20 | |||
| 21 | /** |
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| 22 | * Converts member names to variable names |
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| 23 | * If not set, all special characters will be replaced by underscore |
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| 24 | * For example, 'first-name' will be converted to 'first_name' |
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| 25 | * @var callable |
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| 26 | */ |
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| 27 | public $memberNameCallback = ['tuyakhov\jsonapi\Inflector', 'member2var']; |
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| 28 | |||
| 29 | /** |
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| 30 | * Parse resource object into the input data to populates the model |
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| 31 | * @inheritdoc |
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| 32 | */ |
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| 33 | public function parse($rawBody, $contentType) |
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| 34 | { |
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| 35 | $array = parent::parse($rawBody, $contentType); |
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| 36 | if ($type = ArrayHelper::getValue($array, 'data.type')) { |
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| 37 | $formName = $this->typeToFormName($type); |
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| 38 | if ($attributes = ArrayHelper::getValue($array, 'data.attributes')) { |
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| 39 | $result[$formName] = array_combine($this->parseMemberNames(array_keys($attributes)), array_values($attributes)); |
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| 40 | } elseif ($id = ArrayHelper::getValue($array, 'data.id')) { |
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| 41 | $result[$formName] = ['id' => $id, 'type' => $type]; |
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| 42 | } |
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| 43 | if ($relationships = ArrayHelper::getValue($array, 'data.relationships')) { |
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| 44 | foreach ($relationships as $name => $relationship) { |
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| 45 | if (isset($relationship[0])) { |
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| 46 | View Code Duplication | foreach ($relationship as $item) { |
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| 47 | if (isset($item['type']) && isset($item['id'])) { |
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| 48 | $formName = $this->typeToFormName($item['type']); |
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| 49 | $result[$name][$formName][] = $item; |
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| 50 | } |
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| 51 | } |
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| 52 | } elseif (isset($relationship['type']) && isset($relationship['id'])) { |
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| 53 | $formName = $this->typeToFormName($relationship['type']); |
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| 54 | $result[$name][$formName] = $relationship; |
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| 55 | } |
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| 56 | } |
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| 57 | } |
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| 58 | } else { |
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| 59 | $data = ArrayHelper::getValue($array, 'data', []); |
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| 60 | View Code Duplication | foreach ($data as $relationLink) { |
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| 61 | if (isset($relationLink['type']) && isset($relationLink['id'])) { |
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| 62 | $formName = $this->typeToFormName($relationLink['type']); |
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| 63 | $result[$formName][] = $relationLink; |
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| 64 | } |
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| 65 | } |
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| 66 | } |
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| 67 | return isset($result) ? $result : $array; |
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| 68 | } |
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| 69 | |||
| 70 | /** |
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| 71 | * @param $type 'type' member of the document |
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| 72 | * @return string form name |
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| 73 | */ |
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| 74 | protected function typeToFormName($type) |
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| 78 | |||
| 79 | /** |
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| 80 | * @param array $memberNames |
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| 81 | * @return array variable names |
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| 82 | */ |
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| 83 | protected function parseMemberNames(array $memberNames = []) |
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| 87 | } |
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| 88 |
Adding an explicit array definition is generally preferable to implicit array definition as it guarantees a stable state of the code.
Let’s take a look at an example:
As you can see in this example, the array
$myArrayis initialized the first time when the foreach loop is entered. You can also see that the value of thebarkey is only written conditionally; thus, its value might result from a previous iteration.This might or might not be intended. To make your intention clear, your code more readible and to avoid accidental bugs, we recommend to add an explicit initialization $myArray = array() either outside or inside the foreach loop.