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<?php |
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namespace Rougin\Describe\Driver; |
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use Rougin\Describe\Column; |
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/** |
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* SQLite Driver |
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* |
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* A database driver extension for SQLite. |
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* |
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* @package Describe |
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* @category Driver |
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* @author Rougin Royce Gutib <[email protected]> |
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*/ |
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class SQLiteDriver implements DriverInterface |
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{ |
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/** |
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* @var \PDO |
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*/ |
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protected $pdo; |
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/** |
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* @param PDO $pdo |
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*/ |
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public function __construct(\PDO $pdo) |
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{ |
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$this->pdo = $pdo; |
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} |
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/** |
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* Returns the result. |
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* |
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* @return array |
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*/ |
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public function getTable($table) |
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{ |
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$columns = []; |
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// Gets list of columns |
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$query = 'PRAGMA table_info("' . $table . '");'; |
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$information = $this->pdo->prepare($query); |
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$information->execute(); |
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$information->setFetchMode(\PDO::FETCH_OBJ); |
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while ($row = $information->fetch()) { |
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$column = new Column; |
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$this->setProperties($row, $column); |
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$column->setDefaultValue($row->dflt_value); |
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$column->setField($row->name); |
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$column->setDataType(strtolower($row->type)); |
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array_push($columns, $column); |
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} |
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return $this->prepareForeignColumns($table, $columns); |
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} |
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/** |
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* Shows the list of tables. |
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* |
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* @return array |
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*/ |
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public function showTables() |
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{ |
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$tables = []; |
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// Gets list of columns |
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$query = 'SELECT name FROM sqlite_master WHERE type = "table";'; |
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$information = $this->pdo->prepare($query); |
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$information->execute(); |
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$information->setFetchMode(\PDO::FETCH_OBJ); |
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while ($row = $information->fetch()) { |
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if ($row->name != 'sqlite_sequence') { |
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array_push($tables, $row->name); |
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} |
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} |
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return $tables; |
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} |
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/** |
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* Prepares the columns that have foreign keys. |
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* |
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* @param string $tableName |
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* @param array $columns |
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* @return void |
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*/ |
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protected function prepareForeignColumns($tableName, array $columns) |
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{ |
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// Gets list of foreign keys, if any |
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$query = 'PRAGMA foreign_key_list("' . $tableName . '");'; |
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$table = $this->pdo->prepare($query); |
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$table->execute(); |
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$table->setFetchMode(\PDO::FETCH_OBJ); |
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$rows = []; |
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while ($row = $table->fetch()) { |
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array_push($rows, $row); |
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} |
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return $this->setForeignColumns($columns, $rows); |
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} |
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/** |
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* Sets the properties of the specified column. |
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* |
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* @param array $columns |
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* @param array $rows |
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* @return array |
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*/ |
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protected function setForeignColumns(array $columns, array $rows) |
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{ |
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foreach ($columns as $column) { |
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if ($column->getField() == $row->from) { |
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$column->setForeign(true); |
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$column->setReferencedField($row->to); |
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$column->setReferencedTable($row->table); |
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} |
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} |
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return $columns; |
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} |
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/** |
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* Sets the properties of the specified column. |
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* |
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* @param mixed $row |
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* @param \Rougin\Describe\Column &$column |
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* @return void |
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*/ |
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protected function setProperties($row, Column &$column) |
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{ |
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if (! $row->notnull) { |
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$column->setNull(true); |
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} |
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if ($row->pk) { |
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$column->setPrimary(true); |
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$column->setAutoIncrement(true); |
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} |
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} |
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} |
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rougin /
describe
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This check looks from parameters that have been defined for a function or method, but which are not used in the method body.