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<?php
/**
* This file is part of the "dibi" - smart database abstraction layer.
*
* Copyright (c) 2005 David Grudl (http://davidgrudl.com)
*
* For the full copyright and license information, please view
* the file license.txt that was distributed with this source code.
*/
/**
* The dibi reflector for SQLite database.
*
* @author David Grudl
* @package dibi\drivers
* @internal
*/
class DibiSqliteReflector extends DibiObject implements IDibiReflector
{
/** @var IDibiDriver */
private $driver;
public function __construct(IDibiDriver $driver)
{
$this->driver = $driver;
}
/**
* Returns list of tables.
* @return array
*/
public function getTables()
{
$res = $this->driver->query("
SELECT name, type = 'view' as view FROM sqlite_master WHERE type IN ('table', 'view')
UNION ALL
SELECT name, type = 'view' as view FROM sqlite_temp_master WHERE type IN ('table', 'view')
ORDER BY name
");
$tables = array();
while ($row = $res->fetch(TRUE)) {
$tables[] = $row;
}
return $tables;
}
/**
* Returns metadata for all columns in a table.
* @param string
* @return array
*/
public function getColumns($table)
{
$meta = $this->driver->query("
SELECT sql FROM sqlite_master WHERE type = 'table' AND name = {$this->driver->escape($table, dibi::TEXT)}
UNION ALL
SELECT sql FROM sqlite_temp_master WHERE type = 'table' AND name = {$this->driver->escape($table, dibi::TEXT)}
")->fetch(TRUE);
$res = $this->driver->query("PRAGMA table_info({$this->driver->escape($table, dibi::IDENTIFIER)})");
$columns = array();
while ($row = $res->fetch(TRUE)) {
$column = $row['name'];
$pattern = "/(\"$column\"|\[$column\]|$column)\\s+[^,]+\\s+PRIMARY\\s+KEY\\s+AUTOINCREMENT/Ui";
$type = explode('(', $row['type']);
$columns[] = array(
'name' => $column,
'table' => $table,
'fullname' => "$table.$column",
'nativetype' => strtoupper($type[0]),
'size' => isset($type[1]) ? (int) $type[1] : NULL,
'nullable' => $row['notnull'] == '0',
'default' => $row['dflt_value'],
'autoincrement' => (bool) preg_match($pattern, $meta['sql']),
'vendor' => $row,
);
}
return $columns;
}
/**
* Returns metadata for all indexes in a table.
* @param string
* @return array
*/
public function getIndexes($table)
{
$res = $this->driver->query("PRAGMA index_list({$this->driver->escape($table, dibi::IDENTIFIER)})");
$indexes = array();
while ($row = $res->fetch(TRUE)) {
$indexes[$row['name']]['name'] = $row['name'];
$indexes[$row['name']]['unique'] = (bool) $row['unique'];
}
foreach ($indexes as $index => $values) {
$res = $this->driver->query("PRAGMA index_info({$this->driver->escape($index, dibi::IDENTIFIER)})");
while ($row = $res->fetch(TRUE)) {
$indexes[$index]['columns'][$row['seqno']] = $row['name'];
}
}
$columns = $this->getColumns($table);
foreach ($indexes as $index => $values) {
$column = $indexes[$index]['columns'][0];
$primary = FALSE;
foreach ($columns as $info) {
if ($column == $info['name']) {
$primary = $info['vendor']['pk'];
break;
}
}
$indexes[$index]['primary'] = (bool) $primary;
}
if (!$indexes) { // @see http://www.sqlite.org/lang_createtable.html#rowid
foreach ($columns as $column) {
if ($column['vendor']['pk']) {
$indexes[] = array(
'name' => 'ROWID',
'unique' => TRUE,
'primary' => TRUE,
'columns' => array($column['name']),
);
break;
}
}
}
return array_values($indexes);
}
/**
* Returns metadata for all foreign keys in a table.
* @param string
* @return array
*/
public function getForeignKeys($table)
{
if (!($this->driver instanceof DibiSqlite3Driver)) {
// throw new DibiNotSupportedException; // @see http://www.sqlite.org/foreignkeys.html
}
$res = $this->driver->query("PRAGMA foreign_key_list({$this->driver->escape($table, dibi::IDENTIFIER)})");
$keys = array();
while ($row = $res->fetch(TRUE)) {
$keys[$row['id']]['name'] = $row['id']; // foreign key name
$keys[$row['id']]['local'][$row['seq']] = $row['from']; // local columns
$keys[$row['id']]['table'] = $row['table']; // referenced table
$keys[$row['id']]['foreign'][$row['seq']] = $row['to']; // referenced columns
$keys[$row['id']]['onDelete'] = $row['on_delete'];
$keys[$row['id']]['onUpdate'] = $row['on_update'];
if ($keys[$row['id']]['foreign'][0] == NULL) {
$keys[$row['id']]['foreign'] = NULL;
}
}
return array_values($keys);
}
}
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