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 FlexiBeeRW 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 FlexiBeeRW, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 16 | class FlexiBeeRW extends FlexiBeeRO |
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| 17 | { |
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| 18 | /** |
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| 19 | * Sloupeček obsahující datum vložení záznamu do shopu. |
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| 20 | * |
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| 21 | * @var string |
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| 22 | */ |
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| 23 | public $myCreateColumn = 'false'; |
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| 24 | |||
| 25 | /** |
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| 26 | * Slopecek obsahujici datum poslení modifikace záznamu do shopu. |
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| 27 | * |
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| 28 | * @var string |
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| 29 | */ |
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| 30 | public $myLastModifiedColumn = 'lastUpdate'; |
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| 31 | |||
| 32 | /** |
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| 33 | * Last Inserted ID. |
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| 34 | * |
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| 35 | * @var int |
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| 36 | */ |
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| 37 | public $lastInsertedID = null; |
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| 38 | |||
| 39 | /** |
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| 40 | * Array of fields for next curl POST operation |
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| 41 | * |
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| 42 | * @var string |
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| 43 | */ |
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| 44 | public $postFields = null; |
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| 45 | |||
| 46 | /** |
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| 47 | * Save record (if evidence allow to). |
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| 48 | * Uloží záznam (pokud to evidence dovoluje) |
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| 49 | * |
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| 50 | * @param array $data Data to save |
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| 51 | * @throws Exception Evidence does not support Import |
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| 52 | * |
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| 53 | * @return array odpověď |
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| 54 | */ |
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| 55 | public function insertToFlexiBee($data = null) |
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| 56 | { |
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| 57 | $info = $this->getEvidenceInfo(); |
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| 58 | switch ($info['importStatus']) { |
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| 59 | case 'DISALLOWED': |
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| 60 | throw new \Exception(sprintf('Inserting data to r/o evidence %s', |
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| 61 | $this->getEvidence())); |
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| 62 | case 'NOT_DIRECT': |
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| 63 | throw new \Exception(sprintf('Inserting data to slave only evidence %s', |
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| 64 | $this->getEvidence())); |
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| 65 | case 'NOT_DOCUMENTED': |
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| 66 | if ($this->debug === true) { |
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| 67 | $this->addStatusMessage(sprintf('Inserting data to undocumneted evidence %s', |
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| 68 | $this->getEvidence())); |
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| 69 | } |
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| 70 | |||
| 71 | break; |
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| 72 | case 'SUPPORTED': |
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| 73 | default: |
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| 74 | break; |
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| 75 | } |
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| 76 | |||
| 77 | if (is_null($data)) { |
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| 78 | $data = $this->getData(); |
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| 79 | } |
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| 80 | if ($this->debug === true) { |
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| 81 | $missingColumns = $this->controlMandatoryColumns(); |
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| 82 | if (count($missingColumns)) { |
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| 83 | $this->addStatusMessage(sprintf('Given data does not contain requied Columns: %s', |
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| 84 | implode(',', $missingColumns)) |
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| 85 | , 'warning'); |
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| 86 | } |
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| 87 | } |
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| 88 | $this->postFields = $this->jsonizeData($data); |
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| 89 | return $this->performRequest($this->evidence.'.'.$this->format, 'PUT'); |
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| 90 | } |
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| 91 | |||
| 92 | /** |
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| 93 | * Give you last inserted record ID. |
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| 94 | * |
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| 95 | * @return int |
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| 96 | */ |
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| 97 | public function getLastInsertedId() |
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| 101 | |||
| 102 | /** |
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| 103 | * Smaže záznam |
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| 104 | * Delete record in FlexiBee |
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| 105 | * |
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| 106 | * @param int|string $id identifikátor záznamu |
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| 107 | * @return boolean Response code is 200 ? |
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| 108 | */ |
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| 109 | public function deleteFromFlexiBee($id = null) |
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| 118 | |||
| 119 | /** |
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| 120 | * Control for existing column names in evidence and take data |
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| 121 | * |
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| 122 | * @param array $data Data to keep |
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| 123 | * @return int number of records taken |
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| 124 | */ |
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| 125 | public function takeData($data) |
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| 126 | { |
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| 127 | if ($this->debug === true) { |
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| 128 | $fbColumns = $this->getColumnsInfo(); |
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| 129 | foreach ($this->getRelationsInfo() as $relation) { |
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| 130 | if (is_array($relation) && isset($relation['url'])) { |
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| 131 | $fbRelations[$relation['url']] = $relation['url']; |
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| 132 | } |
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| 133 | } |
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| 134 | |||
| 135 | if (count($fbColumns)) { |
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| 136 | foreach ($data as $key => $value) { |
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| 137 | if (!array_key_exists($key, $fbColumns)) { |
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| 138 | |||
| 139 | if (!array_key_exists($key, $fbRelations)) { |
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| 140 | $this->addStatusMessage(sprintf('unknown column %s for evidence %s', |
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| 141 | $key, $this->getEvidence()), 'warning'); |
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| 142 | } else { |
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| 143 | if (!is_array($value)) { |
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| 144 | $this->addStatusMessage(sprintf('subevidence %s in evidence %s must bee an array', |
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| 145 | $key, $this->getEvidence()), 'warning'); |
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| 146 | } |
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| 147 | } |
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| 148 | } |
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| 149 | } |
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| 150 | } |
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| 151 | } |
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| 152 | return parent::takeData($data); |
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| 153 | } |
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| 154 | |||
| 155 | /** |
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| 156 | * Control data for mandatory columns presence. |
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| 157 | * |
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| 158 | * @param array $data |
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| 159 | * @return array List of missing columns. Empty if all is ok |
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| 160 | */ |
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| 161 | View Code Duplication | public function controlMandatoryColumns($data = null) |
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| 162 | { |
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| 163 | if (is_null($data)) { |
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| 164 | $data = $this->getData(); |
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| 165 | } |
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| 166 | |||
| 167 | $missingMandatoryColumns = []; |
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| 168 | |||
| 169 | $fbColumns = $this->getColumnsInfo(); |
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| 170 | foreach ($fbColumns as $columnName => $columnInfo) { |
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| 171 | $mandatory = ($columnInfo['mandatory'] == 'true'); |
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| 172 | if ($mandatory && !array_key_exists($columnName, $data)) { |
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| 173 | $missingMandatoryColumns[$columnName] = $columnInfo['name']; |
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| 174 | } |
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| 175 | } |
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| 176 | |||
| 177 | return $missingMandatoryColumns; |
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| 178 | } |
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| 179 | |||
| 180 | /** |
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| 181 | * Control data for readonly columns presence. |
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| 182 | * |
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| 183 | * @param array $data |
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| 184 | * @return array List of ReadOnly columns. Empty if all is ok |
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| 185 | */ |
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| 186 | View Code Duplication | public function controlReadOnlyColumns($data = null) |
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| 204 | |||
| 205 | /** |
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| 206 | * Convert Timestamp to FlexiBee Date format. |
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| 207 | * |
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| 208 | * @param int $timpestamp |
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| 209 | * |
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| 210 | * @return string FlexiBee Date or NULL |
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| 211 | */ |
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| 212 | View Code Duplication | public static function timestampToFlexiDate($timpestamp = null) |
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| 222 | |||
| 223 | /** |
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| 224 | * Convert Timestamp to Flexi DateTime format. |
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| 225 | * |
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| 226 | * @param int $timpestamp |
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| 227 | * |
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| 228 | * @return string FlexiBee DateTime or NULL |
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| 229 | */ |
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| 230 | View Code Duplication | public static function timestampToFlexiDateTime($timpestamp = null) |
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| 240 | |||
| 241 | /** |
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| 242 | * Přidá data do větve |
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| 243 | * |
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| 244 | * @thanksto Karel Běl |
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| 245 | * @param array $data pole dat |
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| 246 | * @param string $type path evidence pro vkládaná data |
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| 247 | * @see Relations |
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| 248 | */ |
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| 249 | public function addArrayToBranch($data, $type) |
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| 273 | |||
| 274 | /** |
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| 275 | * Vloží do větve data z objektu |
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| 276 | * |
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| 277 | * @param FlexiBeeRO $object objekt evidence |
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| 278 | */ |
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| 279 | public function addObjectToBranch($object) |
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| 283 | |||
| 284 | } |
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| 285 |
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.