<?php
/*
* OIDplus 2.0
* Copyright 2019 - 2021 Daniel Marschall, ViaThinkSoft
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
class OIDplusDatabaseConnectionSQLite3 extends OIDplusDatabaseConnection {
private $conn = null;
private $prepare_cache = array(); private $last_error = null; // do the same like MySQL+PDO, just to be equal in the behavior
public static function getPlugin(): OIDplusDatabasePlugin {
return new OIDplusDatabasePluginSQLite3();
}
public function doQuery(string $sql, /*?array*/ $prepared_args=null): OIDplusQueryResult {
$this->last_error = null;
try {
$res = $this->conn->query($sql);
} catch (Exception $e) {
$res = false;
}
if ($res === false) {
$this->last_error = $this->conn->lastErrorMsg();
throw new OIDplusSQLException($sql, $this->error());
} else {
return new OIDplusQueryResultSQLite3($res);
}
} else {
throw new OIDplusException(_L('"prepared_args" must be either NULL or an ARRAY.'));
}
// convert ? ? ? to :param1 :param2 :param3 ...
static $i = 0;
$i++;
return ':param'.$i;
}, $sql);
if (isset($this->prepare_cache[$sql])) { $stmt = $this->prepare_cache[$sql];
} else {
try {
$stmt = $this->conn->prepare($sql);
} catch (Exception $e) {
$stmt = false;
}
if ($stmt === false) {
$this->last_error = $this->conn->lastErrorMsg();
throw new OIDplusSQLException($sql, _L('Cannot prepare statement').': '.$this->error());
}
$this->prepare_cache[$sql] = $stmt;
}
if ($stmt->paramCount() != count($prepared_args)) { throw new OIDplusException(_L('Prepared argument list size not matching number of prepared statement arguments'));
}
$i = 1;
foreach ($prepared_args as &$value) {
if (is_bool($value)) $value = $value ?
'1' : '0'; $stmt->bindValue(':param'.$i, $value, SQLITE3_TEXT);
$i++;
}
try {
$ps = $stmt->execute();
} catch (Exception $e) {
$ps = false;
}
if ($ps === false) {
$this->last_error = $this->conn->lastErrorMsg();
throw new OIDplusSQLException($sql, $this->error());
}
return new OIDplusQueryResultSQLite3($ps);
}
}
public function insert_id(): int {
try {
// Note: This will always give results even for tables that do not
// have autoincrements, because SQLite3 assigns an "autoindex" for every table,
// e.g. the config table. Therefore, our testcase will fail.
return (int)$this->conn->lastInsertRowID();
//return (int)$this->query('select last_insert_rowid() as id')->fetch_object()->id;
} catch (Exception $e) {
return 0;
}
}
public function error(): string {
$err = $this->last_error;
if ($err == null) $err = '';
return $err;
}
protected function doConnect()/*: void*/ {
if (!class_exists('SQLite3')) throw new OIDplusConfigInitializationException
(_L
('PHP extension "%1" not installed','SQLite3'));
// Try connecting to the database
try {
$filename = OIDplus::baseConfig()->getValue('SQLITE3_FILE', 'userdata/database/oidplus.db');
$flags = SQLITE3_OPEN_READWRITE/* | SQLITE3_OPEN_CREATE*/;
$encryption = OIDplus::baseConfig()->getValue('SQLITE3_ENCRYPTION', '');
$is_absolute_path = ((substr($filename,0,1) == '/') || (substr($filename,1,1) == ':')); if (!$is_absolute_path) {
// Filename must be absolute path, since OIDplus can be called from several locations (e.g. registration wizard)
$filename = OIDplus::localpath().$filename;
}
$this->conn = new SQLite3($filename, $flags, $encryption);
} catch (Exception $e) {
throw new OIDplusConfigInitializationException(_L('Connection to the database failed!').' ' . $e->getMessage());
}
$this->conn->createCollation('NATURAL_CMP', 'strnatcmp'); // we need that for natSort()
$this->conn->enableExceptions(true); // Throw exceptions instead of PHP warnings
$this->prepare_cache = array(); $this->last_error = null;
}
protected function doDisconnect()/*: void*/ {
$this->prepare_cache = array(); $this->conn = null;
}
private $intransaction = false;
public function transaction_supported(): bool {
return true;
}
public function transaction_level(): int {
return $this->intransaction ? 1 : 0;
}
public function transaction_begin()/*: void*/ {
if ($this->intransaction) throw new OIDplusException(_L('Nested transactions are not supported by this database plugin.'));
$this->query('begin transaction');
$this->intransaction = true;
}
public function transaction_commit()/*: void*/ {
$this->query('commit');
$this->intransaction = false;
}
public function transaction_rollback()/*: void*/ {
$this->query('rollback');
$this->intransaction = false;
}
public function sqlDate(): string {
return 'datetime()';
}
public function natOrder($fieldname, $order='asc'): string {
// This collation is defined in the database plugin using SQLite3::createCollation()
return "$fieldname COLLATE NATURAL_CMP $order";
}
protected function doGetSlang(bool $mustExist=true)/*: ?OIDplusSqlSlangPlugin*/ {
$slang = OIDplus::getSqlSlangPlugin('sqlite');
throw new OIDplusConfigInitializationException(_L('SQL-Slang plugin "%1" is missing. Please check if it exists in the directory "plugin/sqlSlang". If it is not existing, please recover it from an SVN snapshot or OIDplus ZIP file.','sqlite'));
}
return $slang;
}
}