rkrx /
php-mysql-query-builder
| Total Complexity | 55 |
| Total Lines | 323 |
| Duplicated Lines | 0 % |
| Changes | 1 | ||
| Bugs | 0 | Features | 0 |
Complex classes like MySQLRunnableSelect 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.
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 MySQLRunnableSelect, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 19 | class MySQLRunnableSelect extends Select implements RunnableSelect { |
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| 20 | /** @var array<string, mixed> */ |
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| 21 | private $values = []; |
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| 22 | /** @var bool */ |
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| 23 | private $preserveTypes; |
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| 24 | /** @var string */ |
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| 25 | private $defaultClassName; |
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| 26 | /** @var int */ |
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| 27 | private $foundRows = 0; |
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| 28 | |||
| 29 | /** |
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| 30 | * @param MySQL $db |
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| 31 | * @param array<string, mixed> $options |
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| 32 | */ |
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| 33 | public function __construct($db, array $options = []) { |
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| 34 | parent::__construct($db); |
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| 35 | $this->preserveTypes = array_key_exists('preserve-types-default', $options) ? $options['preserve-types-default'] : false; |
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| 36 | $this->defaultClassName = array_key_exists('fetch-object-class-default', $options) ? $options['fetch-object-class-default'] : stdClass::class; |
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| 37 | } |
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| 38 | |||
| 39 | /** |
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| 40 | * @inheritDoc |
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| 41 | */ |
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| 42 | public function bindValues(array $values) { |
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| 43 | $this->values = array_merge($this->values, $values); |
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| 44 | return $this; |
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| 45 | } |
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| 46 | |||
| 47 | /** |
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| 48 | * @inheritDoc |
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| 49 | */ |
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| 50 | public function bindValue(string $key, $value) { |
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| 51 | $this->values[$key] = $value; |
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| 52 | return $this; |
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| 53 | } |
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| 54 | |||
| 55 | /** |
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| 56 | * @inheritDoc |
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| 57 | */ |
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| 58 | public function clearValues() { |
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| 59 | $this->values = []; |
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| 60 | return $this; |
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| 61 | } |
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| 62 | |||
| 63 | /** |
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| 64 | * @inheritDoc |
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| 65 | */ |
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| 66 | public function setPreserveTypes(bool $preserveTypes = true) { |
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| 67 | $this->preserveTypes = $preserveTypes; |
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| 68 | return $this; |
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| 69 | } |
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| 70 | |||
| 71 | /** |
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| 72 | * @inheritDoc |
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| 73 | */ |
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| 74 | public function fetchRows($callback = null): array { |
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| 75 | return $this->fetchAll($callback, PDO::FETCH_ASSOC); |
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| 76 | } |
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| 77 | |||
| 78 | /** |
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| 79 | * @inheritDoc |
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| 80 | */ |
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| 81 | public function fetchRowsLazy($callback = null) { |
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| 82 | $callback = $callback ?? (static function ($row) { return $row; }); |
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| 83 | yield from $this->fetchLazy($callback, PDO::FETCH_ASSOC); |
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| 84 | } |
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| 85 | |||
| 86 | /** |
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| 87 | * @inheritDoc |
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| 88 | */ |
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| 89 | public function fetchRow($callback = null): array { |
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| 90 | $callback = $callback ?? (static function ($row) { return $row; }); |
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| 91 | return $this->fetch($callback, PDO::FETCH_ASSOC, null, static function ($row) { |
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| 92 | return ['valid' => is_array($row), 'default' => []]; |
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| 93 | }); |
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| 94 | } |
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| 95 | |||
| 96 | /** |
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| 97 | * @inheritDoc |
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| 98 | */ |
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| 99 | public function fetchObjects(string $className = 'stdClass', $callback = null): array { |
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| 100 | return $this->createTempStatement(function (QueryStatement $statement) use ($className, $callback) { |
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| 101 | $data = $statement->fetchAll(PDO::FETCH_CLASS, $className); |
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| 102 | if($this->preserveTypes) { |
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| 103 | $columnDefinitions = FieldTypeProvider::getFieldTypes($statement); |
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| 104 | $data = array_map(static function ($row) use ($columnDefinitions) { return FieldValueConverter::convertValues($row, $columnDefinitions); }, $data); |
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| 105 | } |
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| 106 | if($callback !== null) { |
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| 107 | return call_user_func(static function ($resultData = []) use ($data, $callback) { |
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| 108 | foreach($data as $row) { |
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| 109 | $result = $callback($row); |
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| 110 | if($result !== null && !($result instanceof DBIgnoreRow)) { |
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| 111 | $resultData[] = $result; |
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| 112 | } else { |
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| 113 | $resultData[] = $row; |
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| 114 | } |
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| 115 | } |
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| 116 | return $resultData; |
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| 117 | }); |
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| 118 | } |
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| 119 | return $data; |
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| 120 | }); |
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| 121 | } |
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| 122 | |||
| 123 | /** |
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| 124 | * @inheritDoc |
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| 125 | */ |
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| 126 | public function fetchObjectsLazy($className = null, $callback = null) { |
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| 127 | $callback = $callback ?? (static function ($row) { return $row; }); |
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| 128 | yield from $this->fetchLazy($callback, PDO::FETCH_CLASS, $className ?: $this->defaultClassName); |
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| 129 | } |
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| 130 | |||
| 131 | /** |
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| 132 | * @inheritDoc |
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| 133 | */ |
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| 134 | public function fetchObject($className = null, $callback = null) { |
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| 135 | $callback = $callback ?? (static function ($row) { return $row; }); |
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| 136 | return $this->fetch($callback, PDO::FETCH_CLASS, $className ?: $this->defaultClassName, static function ($row) { |
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| 137 | return ['valid' => is_object($row), 'default' => null]; |
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| 138 | }); |
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| 139 | } |
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| 140 | |||
| 141 | /** |
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| 142 | * @inheritDoc |
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| 143 | */ |
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| 144 | public function fetchKeyValue($treatValueAsArray = false): array { |
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| 145 | return $this->createTempStatement(static function (QueryStatement $statement) use ($treatValueAsArray) { |
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| 146 | if($treatValueAsArray) { |
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| 147 | $rows = $statement->fetchAll(PDO::FETCH_ASSOC); |
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| 148 | $result = []; |
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| 149 | foreach($rows as $row) { |
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| 150 | [$key] = array_values($row); |
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| 151 | $result[$key] = $row; |
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| 152 | } |
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| 153 | return $result; |
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| 154 | } |
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| 155 | return $statement->fetchAll(PDO::FETCH_KEY_PAIR); |
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| 156 | }); |
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| 157 | } |
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| 158 | |||
| 159 | /** |
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| 160 | * @inheritDoc |
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| 161 | */ |
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| 162 | public function fetchGroups(array $fields): array { |
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| 163 | $rows = $this->fetchRows(); |
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| 164 | $result = []; |
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| 165 | foreach($rows as $row) { |
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| 166 | /** @var array<string, mixed> $tmp */ |
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| 167 | $tmp = &$result; |
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| 168 | foreach($fields as $field) { |
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| 169 | $value = (string) $row[$field]; |
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| 170 | if(!array_key_exists($value, $tmp)) { |
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| 171 | $tmp[$value] = []; |
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| 172 | } |
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| 173 | $tmp = &$tmp[$value]; |
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| 174 | } |
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| 175 | $tmp[] = $row; |
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| 176 | } |
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| 177 | return $result; |
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| 178 | } |
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| 179 | |||
| 180 | /** |
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| 181 | * @inheritDoc |
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| 182 | */ |
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| 183 | public function fetchArray(?callable $fn = null): array { |
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| 184 | return $this->createTempStatement(static function (QueryStatement $stmt) use ($fn) { |
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| 185 | if($fn !== null) { |
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| 186 | return $stmt->fetchAll(PDO::FETCH_FUNC, $fn); |
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| 187 | } |
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| 188 | return $stmt->fetchAll(PDO::FETCH_COLUMN); |
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| 189 | }); |
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| 190 | } |
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| 191 | |||
| 192 | /** |
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| 193 | * @inheritDoc |
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| 194 | */ |
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| 195 | public function fetchValue($default = null, ?callable $fn = null) { |
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| 196 | return $this->createTempStatement(static function (QueryStatement $stmt) use ($default, $fn) { |
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| 197 | $result = $stmt->fetchAll(PDO::FETCH_COLUMN); |
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| 198 | if($result !== false && array_key_exists(0, $result)) { |
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| 199 | return $fn !== null ? $fn($result[0]) : $result[0]; |
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| 200 | } |
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| 201 | return $default; |
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| 202 | }); |
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| 203 | } |
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| 204 | |||
| 205 | /** |
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| 206 | * @inheritDoc |
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| 207 | */ |
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| 208 | public function getFoundRows(): int { |
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| 209 | return $this->foundRows; |
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| 210 | } |
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| 211 | |||
| 212 | /** |
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| 213 | * @param callable $fn |
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| 214 | * @return mixed |
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| 215 | */ |
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| 216 | private function createTempStatement(callable $fn) { |
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| 217 | $stmt = $this->createStatement(); |
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| 218 | try { |
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| 219 | return $fn($stmt); |
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| 220 | } finally { |
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| 221 | $stmt->closeCursor(); |
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| 222 | } |
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| 223 | } |
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| 224 | |||
| 225 | /** |
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| 226 | * @return QueryStatement |
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| 227 | */ |
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| 228 | private function createStatement(): QueryStatement { |
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| 229 | $db = $this->db(); |
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| 230 | $query = $this->__toString(); |
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| 231 | $statement = $db->prepare($query); |
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| 232 | $statement->execute($this->values); |
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| 233 | if($this->getCalcFoundRows()) { |
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| 234 | $this->foundRows = (int) $db->query('SELECT FOUND_ROWS()')->fetchColumn(); |
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| 235 | } |
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| 236 | return $statement; |
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| 237 | } |
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| 238 | |||
| 239 | /** |
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| 240 | * @return Generator<int, array<string, mixed>> |
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| 241 | */ |
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| 242 | public function getIterator() { |
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| 243 | yield from $this->fetchRowsLazy(); |
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| 244 | } |
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| 245 | |||
| 246 | /** |
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| 247 | * @param null|callable(array<string, mixed>): (array<string, mixed>|DBIgnoreRow|null|void) $callback |
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| 248 | * @param int $mode |
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| 249 | * @param mixed $arg0 |
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| 250 | * @return array<string, mixed>[] |
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| 251 | */ |
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| 252 | private function fetchAll($callback = null, int $mode = 0, $arg0 = null) { |
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| 253 | return $this->createTempStatement(function (QueryStatement $statement) use ($callback, $mode, $arg0) { |
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| 254 | $statement->setFetchMode($mode, $arg0); |
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| 255 | $data = $statement->fetchAll(); |
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| 256 | if($this->preserveTypes) { |
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| 257 | $columnDefinitions = FieldTypeProvider::getFieldTypes($statement); |
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| 258 | $data = array_map(static function ($row) use ($columnDefinitions) { return FieldValueConverter::convertValues($row, $columnDefinitions); }, $data); |
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| 259 | } |
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| 260 | if($callback !== null) { |
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| 261 | return call_user_func(static function ($resultData = []) use ($data, $callback) { |
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| 262 | foreach($data as $row) { |
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| 263 | $result = $callback($row); |
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| 264 | if($result instanceof DBIgnoreRow) { |
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| 265 | continue; |
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| 266 | } |
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| 267 | if($result !== null) { |
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| 268 | $resultData[] = $result; |
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| 269 | } else { |
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| 270 | $resultData[] = $row; |
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| 271 | } |
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| 272 | } |
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| 273 | return $resultData; |
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| 274 | }); |
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| 275 | } |
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| 276 | return $data; |
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| 277 | }); |
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| 278 | } |
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| 279 | |||
| 280 | /** |
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| 281 | * @template T |
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| 282 | * @template U |
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| 283 | * @param callable(T): U $callback |
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| 284 | * @param int $mode |
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| 285 | * @param mixed $arg0 |
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| 286 | * @return Generator<int, T|U> |
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| 287 | */ |
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| 288 | private function fetchLazy($callback, int $mode = PDO::FETCH_ASSOC, $arg0 = null): Generator { |
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| 289 | $statement = $this->createStatement(); |
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| 290 | $statement->setFetchMode($mode, $arg0); |
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| 291 | try { |
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| 292 | while($row = $statement->fetch()) { |
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| 293 | /** @var T $row */ |
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| 294 | // if($this->preserveTypes) { |
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| 295 | // $columnDefinitions = FieldTypeProvider::getFieldTypes($statement); |
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| 296 | // $row = FieldValueConverter::convertValues($row, $columnDefinitions); |
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| 297 | // } |
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| 298 | $result = $callback($row); |
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| 299 | if($result instanceof DBIgnoreRow) { |
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| 300 | // Skip row in this case |
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| 301 | continue; |
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| 302 | } |
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| 303 | if($result !== null) { |
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| 304 | yield $result; |
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| 305 | } else { |
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| 306 | yield $row; |
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| 307 | } |
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| 308 | } |
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| 309 | } finally { |
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| 310 | try { $statement->closeCursor(); } catch (Throwable $e) {} |
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| 311 | } |
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| 312 | } |
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| 313 | |||
| 314 | /** |
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| 315 | * @template T |
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| 316 | * @template U |
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| 317 | * @param callable(T): U $callback |
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| 318 | * @param int $mode |
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| 319 | * @param mixed $arg0 |
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| 320 | * @param Closure|null $resultValidator |
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| 321 | * @return T|U|array<string, mixed> |
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| 322 | */ |
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| 323 | private function fetch($callback, int $mode = PDO::FETCH_ASSOC, $arg0 = null, Closure $resultValidator = null) { |
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| 342 | }); |
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| 343 | } |
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| 344 | } |
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| 345 |
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