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<?php |
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namespace Maphper\DataSource; |
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class MysqlAdapter implements DatabaseAdapter { |
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private $pdo; |
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private $stmtCache; |
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public function __construct(\PDO $pdo) { |
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$this->pdo = $pdo; |
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//Set to strict mode to detect 'out of range' errors, action at a distance but it needs to be set for all INSERT queries |
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$this->pdo->query('SET sql_mode = STRICT_ALL_TABLES'); |
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$this->stmtCache = new StmtCache($pdo); |
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} |
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public function quote($str) { |
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return '`' . str_replace('.', '`.`', trim($str, '`')) . '`'; |
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} |
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public function query(\Maphper\Lib\Query $query) { |
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$stmt = $this->stmtCache->getCachedStmt($query->getSql()); |
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$args = $query->getArgs(); |
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$stmt->execute($args); |
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return $stmt; |
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} |
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private function getType($val) { |
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if ($val instanceof \DateTime) return 'DATETIME'; |
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else if (is_int($val)) return 'INT(11)'; |
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else if (is_double($val)) return 'DECIMAL(9,' . strlen($val) - strrpos($val, '.') - 1 . ')'; |
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else if (is_string($val)) return strlen($val) < 192 ? 'VARCHAR(191)' : 'LONGBLOB'; |
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return 'VARCHAR(191)'; |
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} |
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//Alter the database so that it can store $data |
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private function createTable($table, array $primaryKey, $data) { |
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$parts = []; |
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foreach ($primaryKey as $key) { |
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$pk = $data->$key; |
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if ($pk == null) $parts[] = $key . ' INT(11) NOT NULL AUTO_INCREMENT'; |
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else $parts[] = $key . ' ' . $this->getType($pk) . ' NOT NULL'; |
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} |
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$pkField = implode(', ', $parts) . ', PRIMARY KEY(' . implode(', ', $primaryKey) . ')'; |
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$this->pdo->query('CREATE TABLE IF NOT EXISTS ' . $table . ' (' . $pkField . ')'); |
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} |
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private function alterColumns($table, array $primaryKey, $data) { |
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foreach ($data as $key => $value) { |
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if ($this->isNotSavableType($value, $key, $primaryKey)) continue; |
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$type = $this->getType($value); |
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try { |
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if (!$this->pdo->query('ALTER TABLE ' . $table . ' ADD ' . $this->quote($key) . ' ' . $type)) throw new \Exception('Could not alter table'); |
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} |
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catch (\Exception $e) { |
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$this->pdo->query('ALTER TABLE ' . $table . ' MODIFY ' . $this->quote($key) . ' ' . $type); |
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} |
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} |
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} |
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private function isNotSavableType($value, $key, $primaryKey) { |
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return is_array($value) || (is_object($value) && !($value instanceof \DateTime)) || |
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in_array($key, $primaryKey); |
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} |
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public function alterDatabase($table, array $primaryKey, $data) { |
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$this->createTable($table, $primaryKey, $data); |
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$this->alterColumns($table, $primaryKey, $data); |
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} |
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public function lastInsertId() { |
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return $this->pdo->lastInsertId(); |
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} |
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public function addIndex($table, array $fields) { |
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//Sort the fields so that the index is never created twice (col1, col2) then (col2, col1) |
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sort($fields); |
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$fields = array_map('strtolower', $fields); |
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$fields = array_map('trim', $fields); |
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$keyName = $this->quote(implode('_', $fields)); |
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$results = $this->pdo->query('SHOW INDEX FROM ' . $this->quote($table) . ' WHERE Key_Name = "' . $keyName . '"'); |
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if ($results && count($results->fetchAll()) == 0) $this->pdo->query('CREATE INDEX ' . $keyName . ' ON ' . $this->quote($table) . ' (' . implode(', ', $fields) . ')'); |
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} |
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public function optimiseColumns($table) { |
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//TODO |
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return; |
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} |
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} |
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Level-2 /
Maphper
