mirror of https://github.com/friendica/friendica
782 lines
19 KiB
PHP
782 lines
19 KiB
PHP
<?php
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namespace Friendica\Database;
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use Friendica\Core\Config\Cache\IConfigCache;
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use Friendica\Core\System;
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use Friendica\Database\Driver\DriverException;
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use Friendica\Database\Driver\IDriver;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\Profiler;
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use Psr\Log\LoggerInterface;
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class Database implements IDatabase, IDatabaseLock
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{
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/**
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* The profile the database calls
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* @var Profiler
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*/
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private $profiler;
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/**
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* The basic configuration cache
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* @var IConfigCache
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*/
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private $configCache;
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/**
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* The current driver of the database
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* @var IDriver
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*/
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private $driver;
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/**
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* The logger instance
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* @var LoggerInterface
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*/
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private $logger;
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/**
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* True, if the database is currently in a transaction
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* @var bool
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*/
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private $inTransaction;
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/**
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* Saves the whole DB relation for performance reason
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* @var array
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*/
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private $dbRelation;
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public function __construct(IDriver $driver, IConfigCache $configCache, Profiler $profiler, LoggerInterface $logger)
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{
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$this->configCache = $configCache;
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$this->profiler = $profiler;
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$this->driver = $driver;
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$this->logger = $logger;
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$this->driver->connect();
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}
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/**
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* {@inheritDoc}
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*/
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public function setLogger(LoggerInterface $logger)
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{
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$this->logger = $logger;
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}
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/**
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* {@inheritDoc}
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*/
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public function getDriver()
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{
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return $this->driver;
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}
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/**
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* {@inheritdoc}
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* @throws \Exception
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*/
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public function getDatabaseName()
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{
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$ret = $this->prepared("SELECT DATABASE() AS `db`");
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$data = $this->toArray($ret);
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return $data[0]['db'];
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}
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/**
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* {@inheritDoc}
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*/
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public function close($stmt)
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{
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$stamp1 = microtime(true);
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if (!is_object($stmt)) {
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return false;
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}
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$ret = $this->driver->closeStatement($stmt);
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$this->profiler->saveTimestamp($stamp1, 'database', System::callstack());
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return $ret;
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}
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/**
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* {@inheritDoc}
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*/
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public function transaction()
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{
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if (!$this->driver->performCommit() ||
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!$this->driver->startTransaction()) {
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return false;
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}
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$this->inTransaction = true;
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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public function exists($table, array $condition)
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{
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return DBA::exists($table, $condition);
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}
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public function count($table, array $condition = [])
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{
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return DBA::count($table, $condition);
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}
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public function fetch($stmt)
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{
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$stamp1 = microtime(true);
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if (!is_object($stmt)) {
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return false;
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}
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$columns = $this->driver->fetch($stmt);
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$this->profiler->saveTimestamp($stamp1, 'database', System::callstack());
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return $columns;
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}
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/**
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* {@inheritDoc}
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*/
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public function commit()
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{
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if (!$this->driver->performCommit()) {
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return false;
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}
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$this->inTransaction = false;
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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public function rollback()
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{
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$ret = $this->driver->rollbackTransaction();
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$this->inTransaction = false;
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return $ret;
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}
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public function insert($table, array $param, $on_duplicate_update = false)
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{
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return DBA::insert($table, $param, $on_duplicate_update);
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}
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/**
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* {@inheritDoc}
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*/
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public function delete($table, array $conditions, $cascade = true, array &$callstack = [])
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{
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$driver = $this->driver;
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$logger = $this->logger;
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if (empty($table) || empty($conditions)) {
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$logger->info('Table and conditions have to be set');
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return false;
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}
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$commands = [];
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// Create a key for the loop prevention
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$key = $table . ':' . json_encode($conditions);
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// We quit when this key already exists in the callstack.
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if (isset($callstack[$key])) {
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return $commands;
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}
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$callstack[$key] = true;
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$table = $driver->escape($table);
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$commands[$key] = ['table' => $table, 'conditions' => $conditions];
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// To speed up the whole process we cache the table relations
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if ($cascade && count($this->dbRelation) == 0) {
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$this->buildRelationData();
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}
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// Is there a relation entry for the table?
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if ($cascade && isset($this->dbRelation[$table])) {
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// We only allow a simple "one field" relation.
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$field = array_keys($this->dbRelation[$table])[0];
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$rel_def = array_values($this->dbRelation[$table])[0];
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// Create a key for preventing double queries
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$qkey = $field . '-' . $table . ':' . json_encode($conditions);
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// When the search field is the relation field, we don't need to fetch the rows
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// This is useful when the leading record is already deleted in the frontend but the rest is done in the backend
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if ((count($conditions) == 1) && ($field == array_keys($conditions)[0])) {
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foreach ($rel_def AS $rel_table => $rel_fields) {
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foreach ($rel_fields AS $rel_field) {
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$this->delete($rel_table, [$rel_field => array_values($conditions)[0]], $cascade, $callstack);
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}
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}
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// We quit when this key already exists in the callstack.
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} elseif (!isset($callstack[$qkey])) {
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$callstack[$qkey] = true;
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// Fetch all rows that are to be deleted
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$data = self::select($table, [$field], $conditions);
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while ($row = self::fetch($data)) {
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$this->delete($table, [$field => $row[$field]], $cascade, $callstack);
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}
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$this->close($data);
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// Since we had split the delete command we don't need the original command anymore
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unset($commands[$key]);
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}
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}
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// Now we finalize the process
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$do_transaction = !$this->inTransaction;
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if ($do_transaction) {
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$this->transaction();
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}
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$compacted = [];
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$counter = [];
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foreach ($commands AS $command) {
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$conditions = $command['conditions'];
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reset($conditions);
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$first_key = key($conditions);
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$condition_string = self::buildCondition($conditions);
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if ((count($command['conditions']) > 1) || is_int($first_key)) {
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$sql = "DELETE FROM `" . $command['table'] . "`" . $condition_string;
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$logger->debug(self::replaceParameters($sql, $conditions));
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if (!$this->execute($sql, $conditions)) {
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if ($do_transaction) {
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$this->rollback();
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}
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return false;
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}
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} else {
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$key_table = $command['table'];
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$key_condition = array_keys($command['conditions'])[0];
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$value = array_values($command['conditions'])[0];
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// Split the SQL queries in chunks of 100 values
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// We do the $i stuff here to make the code better readable
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$i = isset($counter[$key_table][$key_condition]) ? $counter[$key_table][$key_condition] : 0;
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if (isset($compacted[$key_table][$key_condition][$i]) && count($compacted[$key_table][$key_condition][$i]) > 100) {
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++$i;
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}
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$compacted[$key_table][$key_condition][$i][$value] = $value;
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$counter[$key_table][$key_condition] = $i;
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}
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}
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foreach ($compacted AS $table => $values) {
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foreach ($values AS $field => $field_value_list) {
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foreach ($field_value_list AS $field_values) {
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$sql = "DELETE FROM `" . $table . "` WHERE `" . $field . "` IN (" .
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substr(str_repeat("?, ", count($field_values)), 0, -2) . ");";
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$logger->debug(self::replaceParameters($sql, $field_values));
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if (!$this->execute($sql, $field_values)) {
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if ($do_transaction) {
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$this->rollback();
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}
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return false;
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}
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}
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}
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}
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if ($do_transaction) {
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$this->commit();
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}
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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public function update($table, array $fields, array $condition, $old_fields = [])
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{
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$driver = $this->driver;
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$logger = $this->logger;
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if (empty($table) || empty($fields) || empty($condition)) {
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$logger->info('Table, fields and condition have to be set');
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return false;
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}
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$table = $driver->escape($table);
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$condition_string = self::buildCondition($condition);
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if (is_bool($old_fields)) {
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$do_insert = $old_fields;
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$old_fields = $this->selectFirst($table, [], $condition);
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if (is_bool($old_fields)) {
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if ($do_insert) {
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$values = array_merge($condition, $fields);
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return $this->insert($table, $values, $do_insert);
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}
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$old_fields = [];
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}
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}
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$do_update = (count($old_fields) == 0);
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foreach ($old_fields AS $fieldname => $content) {
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if (isset($fields[$fieldname])) {
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if (($fields[$fieldname] == $content) && !is_null($content)) {
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unset($fields[$fieldname]);
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} else {
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$do_update = true;
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}
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}
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}
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if (!$do_update || (count($fields) == 0)) {
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return true;
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}
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$sql = "UPDATE `".$table."` SET `".
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implode("` = ?, `", array_keys($fields))."` = ?".$condition_string;
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$params1 = array_values($fields);
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$params2 = array_values($condition);
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$params = array_merge_recursive($params1, $params2);
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return $this->execute($sql, $params);
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}
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/**
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* {@inheritDoc}
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*/
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public function select($table, array $fields = [], array $condition = [], array $params = [])
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{
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if ($table == '') {
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return false;
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}
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$table = $this->driver->escape($table);
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if (count($fields) > 0) {
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$select_fields = "`" . implode("`, `", array_values($fields)) . "`";
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} else {
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$select_fields = "*";
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}
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$condition_string = self::buildCondition($condition);
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$param_string = self::buildParameter($params);
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$sql = "SELECT " . $select_fields . " FROM `" . $table . "`" . $condition_string . $param_string;
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$result = $this->prepared($sql, $condition);
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return $result;
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}
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/**
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* {@inheritDoc}
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*/
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public function selectFirst($table, array $fields = [], array $condition = [], array $params = [])
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{
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$params['limit'] = 1;
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$result = $this->select($table, $fields, $condition, $params);
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if (is_bool($result)) {
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return $result;
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} else {
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$row = $this->fetch($result);
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$this->close($result);
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return $row;
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}
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}
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public function lock($table)
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{
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return DBA::lock($table);
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}
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public function unlock()
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{
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return DBA::unlock();
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}
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/**
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* {@inheritDoc}
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*/
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public function prepared($sql)
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{
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$logger = $this->logger;
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$profiler = $this->profiler;
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$config = $this->configCache;
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$driver = $this->driver;
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$stamp1 = microtime(true);
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$params = $this->getParameters(func_get_args());
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// Renumber the array keys to be sure that they fit
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$i = 0;
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$args = [];
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foreach ($params AS $param) {
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// Avoid problems with some MySQL servers and boolean values. See issue #3645
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if (is_bool($param)) {
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$param = (int)$param;
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}
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$args[++$i] = $param;
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}
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if (!$driver->isConnected()) {
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return false;
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}
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if ((substr_count($sql, '?') != count($args)) && (count($args) > 0)) {
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// Question: Should we continue or stop the query here?
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$logger->warning('Query parameters mismatch.', ['query' => $sql, 'args' => $args, 'callstack' => System::callstack()]);
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}
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$sql = $this->cleanQuery($sql);
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$sql = $this->anyValueFallback($sql);
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if ($config->get('system', 'db_callstack') !== null) {
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$sql = "/*".System::callstack()." */ ".$sql;
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}
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self::$error = '';
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self::$errorno = 0;
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self::$affected_rows = 0;
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// We have to make some things different if this function is called from "e"
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$trace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2);
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if (isset($trace[1])) {
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$called_from = $trace[1];
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} else {
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// We use just something that is defined to avoid warnings
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$called_from = $trace[0];
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}
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// We are having an own error logging in the function "e"
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$called_from_e = ($called_from['function'] == 'e');
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try {
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$retval = $driver->executePrepared($sql, $args);
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self::$affected_rows = $driver->getNumRows($retval);
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} catch (DriverException $exception) {
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// We are having an own error logging in the function "e"
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if (($exception->getCode() != 0) && !$called_from_e) {
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// We have to preserve the error code, somewhere in the logging it get lost
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$error = $exception->getMessage();
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$errorno = $exception->getCode();
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$this->logger->error('DB Error ' . self::$errorno . ': ' . self::$error . "\n" .
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System::callstack(8) . "\n" . self::replaceParameters($sql, $args));
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// On a lost connection we try to reconnect - but only once.
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if ($errorno == 2006) {
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if (self::$in_retrial || !$driver->reconnect()) {
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// It doesn't make sense to continue when the database connection was lost
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if (self::$in_retrial) {
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$logger->notice('Giving up retrial because of database error ' . $errorno . ': ' . $error);
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} else {
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$logger->notice("Couldn't reconnect after database error " . $errorno . ': ' . $error);
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}
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exit(1);
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} else {
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// We try it again
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$logger->notice('Reconnected after database error ' . $errorno . ': ' . $error);
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self::$in_retrial = true;
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$ret = $this->prepared($sql, $args);
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self::$in_retrial = false;
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return $ret;
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}
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}
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self::$error = $error;
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self::$errorno = $errorno;
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}
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}
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$profiler->saveTimestamp($stamp1, 'database', System::callstack());
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if ($config->get('system', 'db_log')) {
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$stamp2 = microtime(true);
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$duration = (float)($stamp2 - $stamp1);
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if (($duration > $config->get('system', 'db_loglimit'))) {
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$duration = round($duration, 3);
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$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
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@file_put_contents($config->get('system', 'db_log'), DateTimeFormat::utcNow() . $duration . "\t" .
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basename($backtrace[1]["file"])."\t" .
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$backtrace[1]["line"]."\t".$backtrace[2]["function"]."\t" .
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substr(self::replaceParameters($sql, $args), 0, 2000)."\n", FILE_APPEND);
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}
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}
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return $retval;
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}
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/**
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* {@inheritDoc}
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*/
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public function execute($sql)
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{
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$profiler = $this->profiler;
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$logger = $this->logger;
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$stamp = microtime(true);
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$params = self::getParameters(func_get_args());
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// In a case of a deadlock we are repeating the query 20 times
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$timeout = 20;
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$errorno = 0;
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do {
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try {
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$stmt = $this->prepared($sql, $params);
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if (is_bool($stmt)) {
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$retval = $stmt;
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} elseif (is_object($stmt)) {
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$retval = true;
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} else {
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$retval = false;
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}
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$this->close($stmt);
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} catch (DriverException $exception) {
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$errorno = $exception->getCode();
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}
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} while (($errorno == 1213) && (--$timeout > 0));
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if ($errorno != 0) {
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// We have to preserve the error code, somewhere in the logging it get lost
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|
$error = self::$error;
|
|
$errorno = self::$errorno;
|
|
|
|
$logger->error('DB Error ' . self::$errorno . ': ' . self::$error . "\n" .
|
|
System::callstack(8)."\n".self::replaceParameters($sql, $params));
|
|
|
|
// On a lost connection we simply quit.
|
|
// A reconnect like in self::p could be dangerous with modifications
|
|
if ($errorno == 2006) {
|
|
$logger->notice('Giving up because of database error '.$errorno.': '.$error);
|
|
exit(1);
|
|
}
|
|
|
|
self::$error = $error;
|
|
self::$errorno = $errorno;
|
|
}
|
|
|
|
$profiler->saveTimestamp($stamp, "database_write", System::callstack());
|
|
|
|
return $retval;
|
|
}
|
|
|
|
/**
|
|
* @brief Replaces the ? placeholders with the parameters in the $args array
|
|
*
|
|
* @param string $sql SQL query
|
|
* @param array $args The parameters that are to replace the ? placeholders
|
|
*
|
|
* @return string The replaced SQL query
|
|
*/
|
|
public static function replaceParameters($sql, array $args)
|
|
{
|
|
$offset = 0;
|
|
|
|
foreach ($args AS $param => $value) {
|
|
if (is_int($args[$param]) || is_float($args[$param])) {
|
|
$replace = intval($args[$param]);
|
|
} else {
|
|
$replace = "'" . $this->escape($args[$param]) . "'";
|
|
}
|
|
|
|
$pos = strpos($sql, '?', $offset);
|
|
if ($pos !== false) {
|
|
$sql = substr_replace($sql, $replace, $pos, 1);
|
|
}
|
|
$offset = $pos + strlen($replace);
|
|
}
|
|
|
|
return $sql;
|
|
}
|
|
|
|
/**
|
|
* Convert parameter array to an universal form
|
|
*
|
|
* @param array $args Parameter array
|
|
*
|
|
* @return array universalized parameter array
|
|
*/
|
|
public static function getParameters(array $args)
|
|
{
|
|
unset($args[0]);
|
|
|
|
// When the second function parameter is an array then use this as the parameter array
|
|
if ((count($args) > 0) && (is_array($args[1]))) {
|
|
return $args[1];
|
|
} else {
|
|
return $args;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the SQL condition string built from the provided condition array
|
|
*
|
|
* This function operates with two modes.
|
|
* - Supplied with a filed/value associative array, it builds simple strict
|
|
* equality conditions linked by AND.
|
|
* - Supplied with a flat list, the first element is the condition string and
|
|
* the following arguments are the values to be interpolated
|
|
*
|
|
* $condition = ["uid" => 1, "network" => 'dspr'];
|
|
* or:
|
|
* $condition = ["`uid` = ? AND `network` IN (?, ?)", 1, 'dfrn', 'dspr'];
|
|
*
|
|
* In either case, the provided array is left with the parameters only
|
|
*
|
|
* @param array $condition
|
|
* @return string
|
|
*/
|
|
public static function buildCondition(array &$condition = [])
|
|
{
|
|
$condition_string = '';
|
|
if (count($condition) > 0) {
|
|
reset($condition);
|
|
$first_key = key($condition);
|
|
if (is_int($first_key)) {
|
|
$condition_string = " WHERE (" . array_shift($condition) . ")";
|
|
} else {
|
|
$new_values = [];
|
|
$condition_string = "";
|
|
foreach ($condition as $field => $value) {
|
|
if ($condition_string != "") {
|
|
$condition_string .= " AND ";
|
|
}
|
|
if (is_array($value)) {
|
|
/* Workaround for MySQL Bug #64791.
|
|
* Never mix data types inside any IN() condition.
|
|
* In case of mixed types, cast all as string.
|
|
* Logic needs to be consistent with DBA::p() data types.
|
|
*/
|
|
$is_int = false;
|
|
$is_alpha = false;
|
|
foreach ($value as $single_value) {
|
|
if (is_int($single_value)) {
|
|
$is_int = true;
|
|
} else {
|
|
$is_alpha = true;
|
|
}
|
|
}
|
|
|
|
if ($is_int && $is_alpha) {
|
|
foreach ($value as &$ref) {
|
|
if (is_int($ref)) {
|
|
$ref = (string)$ref;
|
|
}
|
|
}
|
|
unset($ref); //Prevent accidental re-use.
|
|
}
|
|
|
|
$new_values = array_merge($new_values, array_values($value));
|
|
$placeholders = substr(str_repeat("?, ", count($value)), 0, -2);
|
|
$condition_string .= "`" . $field . "` IN (" . $placeholders . ")";
|
|
} else {
|
|
$new_values[$field] = $value;
|
|
$condition_string .= "`" . $field . "` = ?";
|
|
}
|
|
}
|
|
$condition_string = " WHERE (" . $condition_string . ")";
|
|
$condition = $new_values;
|
|
}
|
|
}
|
|
|
|
return $condition_string;
|
|
}
|
|
|
|
/**
|
|
* Build the array with the table relations
|
|
*
|
|
* The array is build from the database definitions in DBStructure.php
|
|
*
|
|
* This process must only be started once, since the value is cached.
|
|
*/
|
|
private function buildRelationData()
|
|
{
|
|
if ($this->exists('config', ['cat' => 'system', 'k' => 'basepath'])) {
|
|
$basePath = $this->select('config', 'v', ['cat' => 'system', 'k' => 'basepath']);
|
|
} else {
|
|
$basePath = $this->configCache->get('system', 'basepath');
|
|
}
|
|
|
|
$definition = DBStructure::definition($basePath);
|
|
|
|
foreach ($definition AS $table => $structure) {
|
|
foreach ($structure['fields'] AS $field => $field_struct) {
|
|
if (isset($field_struct['relation'])) {
|
|
foreach ($field_struct['relation'] AS $rel_table => $rel_field) {
|
|
$this->dbRelation[$rel_table][$rel_field][$table][] = $field;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Callback function for "esc_array"
|
|
*
|
|
* @param mixed $value Array value
|
|
* @param string $key Array key
|
|
* @param boolean $add_quotation add quotation marks for string values
|
|
* @return void
|
|
*/
|
|
private function escapeArrayCallback(&$value, $key, $add_quotation)
|
|
{
|
|
$conn = $this->driver;
|
|
|
|
if (!$add_quotation) {
|
|
if (is_bool($value)) {
|
|
$value = ($value ? '1' : '0');
|
|
} else {
|
|
$value = $conn->escape($value);
|
|
}
|
|
return;
|
|
}
|
|
|
|
if (is_bool($value)) {
|
|
$value = ($value ? 'true' : 'false');
|
|
} elseif (is_float($value) || is_integer($value)) {
|
|
$value = (string) $value;
|
|
} else {
|
|
$value = "'" . $conn->escape($value) . "'";
|
|
}
|
|
}
|
|
}
|