Current File : /www/old2/_music/diplomka/diplomka/src/API/libs/dibi/drivers/sqlite3.php
<?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.
*/
require_once dirname(__FILE__) . '/sqlite.reflector.php';
/**
* The dibi driver for SQLite3 database.
*
* Driver options:
* - database (or file) => the filename of the SQLite3 database
* - formatDate => how to format date in SQL (@see date)
* - formatDateTime => how to format datetime in SQL (@see date)
* - dbcharset => database character encoding (will be converted to 'charset')
* - charset => character encoding to set (default is UTF-8)
* - resource (SQLite3) => existing connection resource
* - lazy, profiler, result, substitutes, ... => see DibiConnection options
*
* @author David Grudl
* @package dibi\drivers
*/
class DibiSqlite3Driver extends DibiObject implements IDibiDriver, IDibiResultDriver
{
/** @var SQLite3 Connection resource */
private $connection;
/** @var SQLite3Result Resultset resource */
private $resultSet;
/** @var bool */
private $autoFree = TRUE;
/** @var string Date and datetime format */
private $fmtDate, $fmtDateTime;
/** @var string character encoding */
private $dbcharset, $charset;
/**
* @throws DibiNotSupportedException
*/
public function __construct()
{
if (!extension_loaded('sqlite3')) {
throw new DibiNotSupportedException("PHP extension 'sqlite3' is not loaded.");
}
}
/**
* Connects to a database.
* @return void
* @throws DibiException
*/
public function connect(array &$config)
{
DibiConnection::alias($config, 'database', 'file');
$this->fmtDate = isset($config['formatDate']) ? $config['formatDate'] : 'U';
$this->fmtDateTime = isset($config['formatDateTime']) ? $config['formatDateTime'] : 'U';
if (isset($config['resource']) && $config['resource'] instanceof SQLite3) {
$this->connection = $config['resource'];
} else try {
$this->connection = new SQLite3($config['database']);
} catch (Exception $e) {
throw new DibiDriverException($e->getMessage(), $e->getCode());
}
$this->dbcharset = empty($config['dbcharset']) ? 'UTF-8' : $config['dbcharset'];
$this->charset = empty($config['charset']) ? 'UTF-8' : $config['charset'];
if (strcasecmp($this->dbcharset, $this->charset) === 0) {
$this->dbcharset = $this->charset = NULL;
}
// enable foreign keys support (defaultly disabled; if disabled then foreign key constraints are not enforced)
$version = SQLite3::version();
if ($version['versionNumber'] >= '3006019') {
$this->query("PRAGMA foreign_keys = ON");
}
}
/**
* Disconnects from a database.
* @return void
*/
public function disconnect()
{
$this->connection->close();
}
/**
* Executes the SQL query.
* @param string SQL statement.
* @return IDibiResultDriver|NULL
* @throws DibiDriverException
*/
public function query($sql)
{
if ($this->dbcharset !== NULL) {
$sql = iconv($this->charset, $this->dbcharset . '//IGNORE', $sql);
}
$res = @$this->connection->query($sql); // intentionally @
if ($this->connection->lastErrorCode()) {
throw new DibiDriverException($this->connection->lastErrorMsg(), $this->connection->lastErrorCode(), $sql);
} elseif ($res instanceof SQLite3Result) {
return $this->createResultDriver($res);
}
}
/**
* Gets the number of affected rows by the last INSERT, UPDATE or DELETE query.
* @return int|FALSE number of rows or FALSE on error
*/
public function getAffectedRows()
{
return $this->connection->changes();
}
/**
* Retrieves the ID generated for an AUTO_INCREMENT column by the previous INSERT query.
* @return int|FALSE int on success or FALSE on failure
*/
public function getInsertId($sequence)
{
return $this->connection->lastInsertRowID();
}
/**
* Begins a transaction (if supported).
* @param string optional savepoint name
* @return void
* @throws DibiDriverException
*/
public function begin($savepoint = NULL)
{
$this->query($savepoint ? "SAVEPOINT $savepoint" : 'BEGIN');
}
/**
* Commits statements in a transaction.
* @param string optional savepoint name
* @return void
* @throws DibiDriverException
*/
public function commit($savepoint = NULL)
{
$this->query($savepoint ? "RELEASE SAVEPOINT $savepoint" : 'COMMIT');
}
/**
* Rollback changes in a transaction.
* @param string optional savepoint name
* @return void
* @throws DibiDriverException
*/
public function rollback($savepoint = NULL)
{
$this->query($savepoint ? "ROLLBACK TO SAVEPOINT $savepoint" : 'ROLLBACK');
}
/**
* Returns the connection resource.
* @return mixed
*/
public function getResource()
{
return $this->connection;
}
/**
* Returns the connection reflector.
* @return IDibiReflector
*/
public function getReflector()
{
return new DibiSqliteReflector($this);
}
/**
* Result set driver factory.
* @param SQLite3Result
* @return IDibiResultDriver
*/
public function createResultDriver(SQLite3Result $resource)
{
$res = clone $this;
$res->resultSet = $resource;
return $res;
}
/********************* SQL ****************d*g**/
/**
* Encodes data for use in a SQL statement.
* @param mixed value
* @param string type (dibi::TEXT, dibi::BOOL, ...)
* @return string encoded value
* @throws InvalidArgumentException
*/
public function escape($value, $type)
{
switch ($type) {
case dibi::TEXT:
return "'" . $this->connection->escapeString($value) . "'";
case dibi::BINARY:
return "X'" . bin2hex((string) $value) . "'";
case dibi::IDENTIFIER:
return '[' . strtr($value, '[]', ' ') . ']';
case dibi::BOOL:
return $value ? 1 : 0;
case dibi::DATE:
return $value instanceof DateTime ? $value->format($this->fmtDate) : date($this->fmtDate, $value);
case dibi::DATETIME:
return $value instanceof DateTime ? $value->format($this->fmtDateTime) : date($this->fmtDateTime, $value);
default:
throw new InvalidArgumentException('Unsupported type.');
}
}
/**
* Encodes string for use in a LIKE statement.
* @param string
* @param int
* @return string
*/
public function escapeLike($value, $pos)
{
$value = addcslashes($this->connection->escapeString($value), '%_\\');
return ($pos <= 0 ? "'%" : "'") . $value . ($pos >= 0 ? "%'" : "'") . " ESCAPE '\\'";
}
/**
* Decodes data from result set.
* @param string value
* @param string type (dibi::BINARY)
* @return string decoded value
* @throws InvalidArgumentException
*/
public function unescape($value, $type)
{
if ($type === dibi::BINARY) {
return $value;
}
throw new InvalidArgumentException('Unsupported type.');
}
/**
* Injects LIMIT/OFFSET to the SQL query.
* @param string &$sql The SQL query that will be modified.
* @param int $limit
* @param int $offset
* @return void
*/
public function applyLimit(&$sql, $limit, $offset)
{
if ($limit < 0 && $offset < 1) return;
$sql .= ' LIMIT ' . $limit . ($offset > 0 ? ' OFFSET ' . (int) $offset : '');
}
/********************* result set ****************d*g**/
/**
* Automatically frees the resources allocated for this result set.
* @return void
*/
public function __destruct()
{
$this->autoFree && $this->resultSet && @$this->free();
}
/**
* Returns the number of rows in a result set.
* @return int
* @throws DibiNotSupportedException
*/
public function getRowCount()
{
throw new DibiNotSupportedException('Row count is not available for unbuffered queries.');
}
/**
* Fetches the row at current position and moves the internal cursor to the next position.
* @param bool TRUE for associative array, FALSE for numeric
* @return array array on success, nonarray if no next record
*/
public function fetch($assoc)
{
$row = $this->resultSet->fetchArray($assoc ? SQLITE3_ASSOC : SQLITE3_NUM);
$charset = $this->charset === NULL ? NULL : $this->charset . '//TRANSLIT';
if ($row && ($assoc || $charset)) {
$tmp = array();
foreach ($row as $k => $v) {
if ($charset !== NULL && is_string($v)) {
$v = iconv($this->dbcharset, $charset, $v);
}
$tmp[str_replace(array('[', ']'), '', $k)] = $v;
}
return $tmp;
}
return $row;
}
/**
* Moves cursor position without fetching row.
* @param int the 0-based cursor pos to seek to
* @return boolean TRUE on success, FALSE if unable to seek to specified record
* @throws DibiNotSupportedException
*/
public function seek($row)
{
throw new DibiNotSupportedException('Cannot seek an unbuffered result set.');
}
/**
* Frees the resources allocated for this result set.
* @return void
*/
public function free()
{
$this->resultSet->finalize();
$this->resultSet = NULL;
}
/**
* Returns metadata for all columns in a result set.
* @return array
*/
public function getResultColumns()
{
$count = $this->resultSet->numColumns();
$columns = array();
static $types = array(SQLITE3_INTEGER => 'int', SQLITE3_FLOAT => 'float', SQLITE3_TEXT => 'text', SQLITE3_BLOB => 'blob', SQLITE3_NULL => 'null');
for ($i = 0; $i < $count; $i++) {
$columns[] = array(
'name' => $this->resultSet->columnName($i),
'table' => NULL,
'fullname' => $this->resultSet->columnName($i),
'nativetype' => $types[$this->resultSet->columnType($i)],
);
}
return $columns;
}
/**
* Returns the result set resource.
* @return mixed
*/
public function getResultResource()
{
$this->autoFree = FALSE;
return $this->resultSet;
}
/********************* user defined functions ****************d*g**/
/**
* Registers an user defined function for use in SQL statements.
* @param string function name
* @param mixed callback
* @param int num of arguments
* @return void
*/
public function registerFunction($name, $callback, $numArgs = -1)
{
$this->connection->createFunction($name, $callback, $numArgs);
}
/**
* Registers an aggregating user defined function for use in SQL statements.
* @param string function name
* @param mixed callback called for each row of the result set
* @param mixed callback called to aggregate the "stepped" data from each row
* @param int num of arguments
* @return void
*/
public function registerAggregateFunction($name, $rowCallback, $agrCallback, $numArgs = -1)
{
$this->connection->createAggregate($name, $rowCallback, $agrCallback, $numArgs);
}
}
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