smrealms /
smr
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| Total Complexity | 65 |
| Total Lines | 283 |
| Duplicated Lines | 0 % |
| Changes | 3 | ||
| Bugs | 0 | Features | 0 |
Complex classes like MySqlDatabase 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 MySqlDatabase, and based on these observations, apply Extract Interface, too.
| 1 | <?php declare(strict_types=1); |
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| 6 | class MySqlDatabase { |
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| 7 | private mysqli $dbConn; |
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| 8 | private MysqlProperties $mysqlProperties; |
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| 9 | private string $selectedDbName; |
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| 10 | /** |
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| 11 | * @var bool | mysqli_result |
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| 12 | */ |
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| 13 | private $dbResult = null; |
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| 14 | /** |
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| 15 | * @var array | null |
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| 16 | */ |
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| 17 | private $dbRecord = null; |
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| 18 | |||
| 19 | public static function getInstance(bool $requireNewInstance = false): MySqlDatabase { |
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| 20 | $class = MySqlDatabase::class; |
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| 21 | return !$requireNewInstance |
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| 22 | ? DiContainer::get($class) |
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| 23 | : DiContainer::make($class); |
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| 24 | } |
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| 25 | |||
| 26 | /** |
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| 27 | * MySqlDatabase constructor. |
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| 28 | * Not intended to be constructed by hand. If you need an instance of MySqlDatabase, |
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| 29 | * use MySqlDatabase::getInstance(); |
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| 30 | * @param mysqli $dbConn The mysqli instance |
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| 31 | * @param MysqlProperties $mysqlProperties The properties object that was used to construct the mysqli instance |
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| 32 | */ |
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| 33 | public function __construct(mysqli $dbConn, MysqlProperties $mysqlProperties) { |
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| 34 | $charset = $dbConn->character_set_name(); |
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| 35 | if ($charset != 'utf8') { |
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| 36 | $this->error('Unexpected charset: ' . $charset); |
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| 37 | } |
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| 38 | $this->dbConn = $dbConn; |
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| 39 | $this->mysqlProperties = $mysqlProperties; |
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| 40 | $this->selectedDbName = $mysqlProperties->getDatabaseName(); |
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| 41 | } |
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| 42 | |||
| 43 | /** |
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| 44 | * This method will switch the connection to the specified database. |
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| 45 | * Useful for switching back and forth between historical, and live databases. |
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| 46 | * |
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| 47 | * @param string $databaseName The name of the database to switch to |
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| 48 | */ |
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| 49 | public function switchDatabases(string $databaseName) { |
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| 50 | $this->dbConn->select_db($databaseName); |
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| 51 | $this->selectedDbName = $databaseName; |
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| 52 | } |
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| 53 | |||
| 54 | /** |
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| 55 | * Switch back to the configured live database |
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| 56 | */ |
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| 57 | public function switchDatabaseToLive() { |
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| 58 | $this->switchDatabases($this->mysqlProperties->getDatabaseName()); |
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| 59 | } |
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| 60 | |||
| 61 | /** |
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| 62 | * Returns the size of the selected database in bytes. |
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| 63 | */ |
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| 64 | public function getDbBytes() { |
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| 65 | $query = 'SELECT SUM(data_length + index_length) as db_bytes FROM information_schema.tables WHERE table_schema=' . $this->escapeString($this->selectedDbName); |
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| 66 | $result = $this->dbConn->query($query); |
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| 67 | return (int)$result->fetch_assoc()['db_bytes']; |
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| 68 | } |
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| 69 | |||
| 70 | // This should not be needed except perhaps by persistent connections |
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| 71 | public function close() { |
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| 72 | if ($this->dbConn) { |
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| 73 | $this->dbConn->close(); |
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| 74 | unset($this->dbConn); |
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| 75 | } |
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| 76 | } |
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| 77 | |||
| 78 | public function query($query) { |
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| 79 | $this->dbResult = $this->dbConn->query($query); |
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| 80 | } |
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| 81 | |||
| 82 | /** |
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| 83 | * Use to populate this instance with the next record of the active query. |
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| 84 | */ |
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| 85 | public function nextRecord(): bool { |
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| 86 | if (!$this->dbResult) { |
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| 87 | $this->error('No resource to get record from.'); |
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| 88 | } |
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| 89 | |||
| 90 | if ($this->dbRecord = $this->dbResult->fetch_assoc()) { |
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| 91 | return true; |
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| 92 | } |
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| 93 | return false; |
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| 94 | } |
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| 95 | |||
| 96 | /** |
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| 97 | * Use instead of nextRecord when exactly one record is expected from the |
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| 98 | * active query. |
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| 99 | */ |
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| 100 | public function requireRecord(): void { |
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| 103 | } |
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| 104 | } |
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| 105 | |||
| 106 | public function hasField($name) { |
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| 107 | return isset($this->dbRecord[$name]); |
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| 108 | } |
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| 109 | |||
| 110 | public function getField($name) { |
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| 111 | return $this->dbRecord[$name]; |
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| 112 | } |
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| 113 | |||
| 114 | public function getBoolean($name) { |
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| 120 | // $this->error('Field is not a boolean'); |
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| 121 | } |
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| 122 | |||
| 123 | public function getInt($name) { |
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| 124 | return (int)$this->dbRecord[$name]; |
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| 125 | } |
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| 126 | |||
| 127 | public function getFloat($name) { |
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| 128 | return (float)$this->dbRecord[$name]; |
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| 129 | } |
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| 130 | |||
| 131 | // WARNING: In the past, Microtime was stored in the database incorrectly. |
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| 132 | // For backwards compatibility, set $pad_msec=true to try to guess at the |
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| 133 | // intended value. This is not safe if the Microtime length is wrong for an |
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| 134 | // unrelated reason! |
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| 135 | public function getMicrotime($name, $pad_msec = false) { |
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| 136 | $data = $this->dbRecord[$name]; |
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| 137 | $sec = substr($data, 0, 10); |
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| 138 | $msec = substr($data, 10); |
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| 139 | if (strlen($msec) != 6) { |
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| 140 | if ($pad_msec) { |
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| 141 | $msec = str_pad($msec, 6, '0', STR_PAD_LEFT); |
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| 142 | } else { |
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| 143 | $this->error('Field is not an escaped microtime (' . $data . ')'); |
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| 144 | } |
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| 145 | } |
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| 146 | return "$sec.$msec"; |
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| 147 | } |
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| 148 | |||
| 149 | public function getObject($name, $compressed = false) { |
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| 150 | $object = $this->getField($name); |
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| 151 | if ($compressed === true) { |
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| 152 | $object = gzuncompress($object); |
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| 153 | } |
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| 154 | return unserialize($object); |
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| 155 | } |
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| 156 | |||
| 157 | public function getRow() { |
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| 158 | return $this->dbRecord; |
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| 159 | } |
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| 160 | |||
| 161 | public function lockTable($table) { |
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| 162 | $this->dbConn->query('LOCK TABLES ' . $table . ' WRITE'); |
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| 163 | } |
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| 164 | |||
| 165 | public function unlock() { |
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| 166 | $this->dbConn->query('UNLOCK TABLES'); |
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| 167 | } |
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| 168 | |||
| 169 | public function getNumRows() { |
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| 170 | return $this->dbResult->num_rows; |
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| 171 | } |
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| 172 | |||
| 173 | public function getChangedRows() { |
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| 174 | return $this->dbConn->affected_rows; |
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| 175 | } |
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| 176 | |||
| 177 | public function getInsertID() { |
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| 178 | return $this->dbConn->insert_id; |
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| 179 | } |
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| 180 | |||
| 181 | protected function error($err) { |
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| 182 | throw new RuntimeException($err); |
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| 183 | } |
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| 184 | |||
| 185 | public function escape($escape, $autoQuotes = true, $quotes = true) { |
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| 211 | } |
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| 212 | } |
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| 213 | } |
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| 214 | |||
| 215 | public function escapeString($string, $quotes = true, $nullable = false) { |
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| 216 | if ($nullable === true && ($string === null || $string === '')) { |
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| 217 | return 'NULL'; |
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| 218 | } |
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| 219 | if ($string === true) { |
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| 220 | $string = 'TRUE'; |
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| 221 | } elseif ($string === false) { |
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| 222 | $string = 'FALSE'; |
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| 223 | } |
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| 224 | if (is_array($string)) { |
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| 225 | $escapedString = ''; |
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| 226 | foreach ($string as $value) { |
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| 227 | $escapedString .= $this->escapeString($value, $quotes) . ','; |
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| 228 | } |
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| 229 | return substr($escapedString, 0, -1); |
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| 230 | } |
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| 231 | if ($quotes) { |
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| 232 | return '\'' . $this->dbConn->real_escape_string($string) . '\''; |
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| 233 | } |
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| 234 | return $this->dbConn->real_escape_string($string); |
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| 235 | } |
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| 236 | |||
| 237 | public function escapeBinary($binary) { |
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| 238 | return '0x' . bin2hex($binary); |
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| 239 | } |
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| 240 | |||
| 241 | public function escapeArray(array $array, $autoQuotes = true, $quotes = true, $implodeString = ',', $escapeIndividually = true) { |
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| 242 | $string = ''; |
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| 243 | if ($escapeIndividually) { |
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| 244 | foreach ($array as $value) { |
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| 245 | if (is_array($value)) { |
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| 246 | $string .= $this->escapeArray($value, $autoQuotes, $quotes, $implodeString, $escapeIndividually) . $implodeString; |
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| 247 | } else { |
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| 248 | $string .= $this->escape($value, $autoQuotes, $quotes) . $implodeString; |
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| 249 | } |
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| 250 | } |
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| 251 | $string = substr($string, 0, -1); |
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| 252 | } else { |
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| 253 | $string = $this->escape(implode($implodeString, $array), $autoQuotes, $quotes); |
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| 254 | } |
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| 255 | return $string; |
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| 256 | } |
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| 257 | |||
| 258 | public function escapeNumber($num) { |
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| 259 | // Numbers need not be quoted in MySQL queries, so if we know $num is |
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| 260 | // numeric, we can simply return its value (no quoting or escaping). |
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| 261 | if (is_numeric($num)) { |
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| 262 | return $num; |
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| 263 | } else { |
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| 264 | $this->error('Not a number! (' . $num . ')'); |
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| 265 | } |
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| 266 | } |
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| 267 | |||
| 268 | public function escapeMicrotime($microtime, $quotes = false) { |
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| 269 | $sec_str = sprintf('%010d', $microtime); |
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| 270 | $usec_str = sprintf('%06d', fmod($microtime, 1) * 1E6); |
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| 271 | return $this->escapeString($sec_str . $usec_str, $quotes); |
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| 272 | } |
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| 273 | |||
| 274 | public function escapeBoolean($bool, $quotes = true) { |
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| 281 | } |
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| 282 | } |
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| 283 | |||
| 284 | public function escapeObject($object, $compress = false, $quotes = true, $nullable = false) { |
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| 289 | } |
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| 290 | } |
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| 291 |
