1506 lines
38 KiB
PHP
1506 lines
38 KiB
PHP
<?php
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use Friendica\App;
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use Friendica\Core\L10n;
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use Friendica\Core\System;
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use Friendica\Database\DBM;
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use Friendica\Database\DBStructure;
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use Friendica\Util\DateTimeFormat;
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/**
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* @class MySQL database class
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*
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* This class is for the low level database stuff that does driver specific things.
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*/
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class dba {
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public static $connected = false;
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private static $_server_info = '';
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private static $db;
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private static $driver;
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private static $error = false;
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private static $errorno = 0;
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private static $affected_rows = 0;
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private static $in_transaction = false;
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private static $in_retrial = false;
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private static $relation = [];
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private static $db_serveraddr = '';
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private static $db_user = '';
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private static $db_pass = '';
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private static $db_name = '';
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public static function connect($serveraddr, $user, $pass, $db) {
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if (!is_null(self::$db) && self::connected()) {
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return true;
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}
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$a = get_app();
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$stamp1 = microtime(true);
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// We are storing these values for being able to perform a reconnect
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self::$db_serveraddr = $serveraddr;
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self::$db_user = $user;
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self::$db_pass = $pass;
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self::$db_name = $db;
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$serveraddr = trim($serveraddr);
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$serverdata = explode(':', $serveraddr);
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$server = $serverdata[0];
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if (count($serverdata) > 1) {
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$port = trim($serverdata[1]);
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}
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$server = trim($server);
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$user = trim($user);
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$pass = trim($pass);
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$db = trim($db);
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if (!(strlen($server) && strlen($user))) {
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return false;
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}
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if (class_exists('\PDO') && in_array('mysql', PDO::getAvailableDrivers())) {
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self::$driver = 'pdo';
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$connect = "mysql:host=".$server.";dbname=".$db;
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if (isset($port)) {
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$connect .= ";port=".$port;
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}
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if (isset($a->config["system"]["db_charset"])) {
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$connect .= ";charset=".$a->config["system"]["db_charset"];
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}
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try {
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self::$db = @new PDO($connect, $user, $pass);
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// Needs more testing
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//self::$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
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//self::$db->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, false);
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self::$connected = true;
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} catch (PDOException $e) {
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}
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}
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if (!self::$connected && class_exists('mysqli')) {
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self::$driver = 'mysqli';
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self::$db = @new mysqli($server, $user, $pass, $db, $port);
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if (!mysqli_connect_errno()) {
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self::$connected = true;
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if (isset($a->config["system"]["db_charset"])) {
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self::$db->set_charset($a->config["system"]["db_charset"]);
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}
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}
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}
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// No suitable SQL driver was found.
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if (!self::$connected) {
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self::$driver = null;
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self::$db = null;
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}
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$a->save_timestamp($stamp1, "network");
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return self::$connected;
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}
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/**
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* Disconnects the current database connection
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*/
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public static function disconnect()
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{
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if (is_null(self::$db)) {
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return;
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}
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switch (self::$driver) {
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case 'pdo':
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self::$db = null;
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break;
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case 'mysqli':
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self::$db->close();
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self::$db = null;
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break;
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}
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}
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/**
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* Perform a reconnect of an existing database connection
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*/
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public static function reconnect() {
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self::disconnect();
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$ret = self::connect(self::$db_serveraddr, self::$db_user, self::$db_pass, self::$db_name);
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return $ret;
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}
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/**
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* Return the database object.
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* @return PDO|mysqli
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*/
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public static function get_db()
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{
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return self::$db;
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}
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/**
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* @brief Returns the MySQL server version string
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*
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* This function discriminate between the deprecated mysql API and the current
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* object-oriented mysqli API. Example of returned string: 5.5.46-0+deb8u1
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*
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* @return string
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*/
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public static function server_info() {
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if (self::$_server_info == '') {
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switch (self::$driver) {
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case 'pdo':
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self::$_server_info = self::$db->getAttribute(PDO::ATTR_SERVER_VERSION);
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break;
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case 'mysqli':
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self::$_server_info = self::$db->server_info;
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break;
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}
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}
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return self::$_server_info;
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}
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/**
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* @brief Returns the selected database name
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*
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* @return string
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*/
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public static function database_name() {
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$ret = self::p("SELECT DATABASE() AS `db`");
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$data = self::inArray($ret);
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return $data[0]['db'];
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}
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/**
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* @brief Analyze a database query and log this if some conditions are met.
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*
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* @param string $query The database query that will be analyzed
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*/
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private static function logIndex($query) {
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$a = get_app();
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if (empty($a->config["system"]["db_log_index"])) {
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return;
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}
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// Don't explain an explain statement
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if (strtolower(substr($query, 0, 7)) == "explain") {
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return;
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}
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// Only do the explain on "select", "update" and "delete"
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if (!in_array(strtolower(substr($query, 0, 6)), ["select", "update", "delete"])) {
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return;
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}
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$r = self::p("EXPLAIN ".$query);
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if (!DBM::is_result($r)) {
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return;
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}
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$watchlist = explode(',', $a->config["system"]["db_log_index_watch"]);
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$blacklist = explode(',', $a->config["system"]["db_log_index_blacklist"]);
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while ($row = dba::fetch($r)) {
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if ((intval($a->config["system"]["db_loglimit_index"]) > 0)) {
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$log = (in_array($row['key'], $watchlist) &&
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($row['rows'] >= intval($a->config["system"]["db_loglimit_index"])));
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} else {
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$log = false;
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}
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if ((intval($a->config["system"]["db_loglimit_index_high"]) > 0) && ($row['rows'] >= intval($a->config["system"]["db_loglimit_index_high"]))) {
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$log = true;
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}
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if (in_array($row['key'], $blacklist) || ($row['key'] == "")) {
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$log = false;
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}
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if ($log) {
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$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
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@file_put_contents($a->config["system"]["db_log_index"], DateTimeFormat::utcNow()."\t".
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$row['key']."\t".$row['rows']."\t".$row['Extra']."\t".
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basename($backtrace[1]["file"])."\t".
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$backtrace[1]["line"]."\t".$backtrace[2]["function"]."\t".
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substr($query, 0, 2000)."\n", FILE_APPEND);
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}
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}
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}
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public static function escape($str) {
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switch (self::$driver) {
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case 'pdo':
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return substr(@self::$db->quote($str, PDO::PARAM_STR), 1, -1);
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case 'mysqli':
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return @self::$db->real_escape_string($str);
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}
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}
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public static function connected() {
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$connected = false;
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switch (self::$driver) {
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case 'pdo':
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$r = dba::p("SELECT 1");
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if (DBM::is_result($r)) {
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$row = dba::inArray($r);
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$connected = ($row[0]['1'] == '1');
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}
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break;
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case 'mysqli':
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$connected = self::$db->ping();
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break;
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}
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return $connected;
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}
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/**
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* @brief Replaces ANY_VALUE() function by MIN() function,
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* if the database server does not support ANY_VALUE().
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*
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* Considerations for Standard SQL, or MySQL with ONLY_FULL_GROUP_BY (default since 5.7.5).
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* ANY_VALUE() is available from MySQL 5.7.5 https://dev.mysql.com/doc/refman/5.7/en/miscellaneous-functions.html
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* A standard fall-back is to use MIN().
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*
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* @param string $sql An SQL string without the values
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* @return string The input SQL string modified if necessary.
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*/
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public static function any_value_fallback($sql) {
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$server_info = self::server_info();
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if (version_compare($server_info, '5.7.5', '<') ||
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(stripos($server_info, 'MariaDB') !== false)) {
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$sql = str_ireplace('ANY_VALUE(', 'MIN(', $sql);
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}
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return $sql;
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}
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/**
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* @brief beautifies the query - useful for "SHOW PROCESSLIST"
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*
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* This is safe when we bind the parameters later.
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* The parameter values aren't part of the SQL.
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*
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* @param string $sql An SQL string without the values
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* @return string The input SQL string modified if necessary.
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*/
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public static function clean_query($sql) {
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$search = ["\t", "\n", "\r", " "];
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$replace = [' ', ' ', ' ', ' '];
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do {
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$oldsql = $sql;
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$sql = str_replace($search, $replace, $sql);
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} while ($oldsql != $sql);
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return $sql;
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}
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/**
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* @brief Replaces the ? placeholders with the parameters in the $args array
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*
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* @param string $sql SQL query
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* @param array $args The parameters that are to replace the ? placeholders
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* @return string The replaced SQL query
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*/
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private static function replaceParameters($sql, $args) {
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$offset = 0;
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foreach ($args AS $param => $value) {
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if (is_int($args[$param]) || is_float($args[$param])) {
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$replace = intval($args[$param]);
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} else {
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$replace = "'".self::escape($args[$param])."'";
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}
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$pos = strpos($sql, '?', $offset);
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if ($pos !== false) {
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$sql = substr_replace($sql, $replace, $pos, 1);
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}
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$offset = $pos + strlen($replace);
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}
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return $sql;
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}
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/**
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* @brief Convert parameter array to an universal form
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* @param array $args Parameter array
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* @return array universalized parameter array
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*/
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private static function getParam($args) {
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unset($args[0]);
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// When the second function parameter is an array then use this as the parameter array
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if ((count($args) > 0) && (is_array($args[1]))) {
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return $args[1];
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} else {
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return $args;
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}
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}
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/**
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* @brief Executes a prepared statement that returns data
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* @usage Example: $r = p("SELECT * FROM `item` WHERE `guid` = ?", $guid);
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*
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* Please only use it with complicated queries.
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* For all regular queries please use dba::select or dba::exists
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*
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* @param string $sql SQL statement
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* @return bool|object statement object or result object
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*/
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public static function p($sql) {
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$a = get_app();
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$stamp1 = microtime(true);
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$params = self::getParam(func_get_args());
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// Renumber the array keys to be sure that they fit
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$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] = $param;
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}
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if (!self::$connected) {
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return false;
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}
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if ((substr_count($sql, '?') != count($args)) && (count($args) > 0)) {
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// Question: Should we continue or stop the query here?
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logger('Parameter mismatch. Query "'.$sql.'" - Parameters '.print_r($args, true), LOGGER_DEBUG);
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}
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$sql = self::clean_query($sql);
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$sql = self::any_value_fallback($sql);
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$orig_sql = $sql;
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if (x($a->config,'system') && x($a->config['system'], 'db_callstack')) {
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$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 = ($called_from['function'] == 'e');
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switch (self::$driver) {
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case 'pdo':
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// If there are no arguments we use "query"
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if (count($args) == 0) {
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if (!$retval = self::$db->query($sql)) {
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$errorInfo = self::$db->errorInfo();
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self::$error = $errorInfo[2];
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self::$errorno = $errorInfo[1];
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$retval = false;
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break;
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}
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self::$affected_rows = $retval->rowCount();
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break;
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}
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if (!$stmt = self::$db->prepare($sql)) {
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$errorInfo = self::$db->errorInfo();
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self::$error = $errorInfo[2];
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self::$errorno = $errorInfo[1];
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$retval = false;
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break;
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}
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foreach ($args AS $param => $value) {
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if (is_int($args[$param])) {
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$data_type = PDO::PARAM_INT;
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} else {
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$data_type = PDO::PARAM_STR;
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}
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$stmt->bindParam($param, $args[$param], $data_type);
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}
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if (!$stmt->execute()) {
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$errorInfo = $stmt->errorInfo();
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self::$error = $errorInfo[2];
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self::$errorno = $errorInfo[1];
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$retval = false;
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} else {
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$retval = $stmt;
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self::$affected_rows = $retval->rowCount();
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}
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break;
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case 'mysqli':
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// There are SQL statements that cannot be executed with a prepared statement
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$parts = explode(' ', $orig_sql);
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$command = strtolower($parts[0]);
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$can_be_prepared = in_array($command, ['select', 'update', 'insert', 'delete']);
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// The fallback routine is called as well when there are no arguments
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if (!$can_be_prepared || (count($args) == 0)) {
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$retval = self::$db->query(self::replaceParameters($sql, $args));
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if (self::$db->errno) {
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self::$error = self::$db->error;
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self::$errorno = self::$db->errno;
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$retval = false;
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} else {
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if (isset($retval->num_rows)) {
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self::$affected_rows = $retval->num_rows;
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} else {
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self::$affected_rows = self::$db->affected_rows;
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}
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}
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break;
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}
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$stmt = self::$db->stmt_init();
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if (!$stmt->prepare($sql)) {
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self::$error = $stmt->error;
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self::$errorno = $stmt->errno;
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$retval = false;
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break;
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}
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$param_types = '';
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$values = [];
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foreach ($args AS $param => $value) {
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if (is_int($args[$param])) {
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$param_types .= 'i';
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} elseif (is_float($args[$param])) {
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$param_types .= 'd';
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} elseif (is_string($args[$param])) {
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$param_types .= 's';
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} else {
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$param_types .= 'b';
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}
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$values[] = &$args[$param];
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}
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if (count($values) > 0) {
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array_unshift($values, $param_types);
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call_user_func_array([$stmt, 'bind_param'], $values);
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}
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if (!$stmt->execute()) {
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self::$error = self::$db->error;
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self::$errorno = self::$db->errno;
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$retval = false;
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} else {
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$stmt->store_result();
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$retval = $stmt;
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self::$affected_rows = $retval->affected_rows;
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}
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break;
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}
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// We are having an own error logging in the function "e"
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if ((self::$errorno != 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 = self::$error;
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$errorno = self::$errorno;
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logger('DB Error '.self::$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::$in_retrial || !self::reconnect()) {
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// It doesn't make sense to continue when the database connection was lost
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if (self::$in_retrial) {
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logger('Giving up retrial because of database error '.$errorno.': '.$error);
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} else {
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logger("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('Reconnected after database error '.$errorno.': '.$error);
|
|
self::$in_retrial = true;
|
|
$ret = self::p($sql, $args);
|
|
self::$in_retrial = false;
|
|
return $ret;
|
|
}
|
|
}
|
|
|
|
self::$error = $error;
|
|
self::$errorno = $errorno;
|
|
}
|
|
|
|
$a->save_timestamp($stamp1, 'database');
|
|
|
|
if (x($a->config,'system') && x($a->config['system'], 'db_log')) {
|
|
|
|
$stamp2 = microtime(true);
|
|
$duration = (float)($stamp2 - $stamp1);
|
|
|
|
if (($duration > $a->config["system"]["db_loglimit"])) {
|
|
$duration = round($duration, 3);
|
|
$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
|
|
|
|
@file_put_contents($a->config["system"]["db_log"], DateTimeFormat::utcNow()."\t".$duration."\t".
|
|
basename($backtrace[1]["file"])."\t".
|
|
$backtrace[1]["line"]."\t".$backtrace[2]["function"]."\t".
|
|
substr(self::replaceParameters($sql, $args), 0, 2000)."\n", FILE_APPEND);
|
|
}
|
|
}
|
|
return $retval;
|
|
}
|
|
|
|
/**
|
|
* @brief Executes a prepared statement like UPDATE or INSERT that doesn't return data
|
|
*
|
|
* Please use dba::delete, dba::insert, dba::update, ... instead
|
|
*
|
|
* @param string $sql SQL statement
|
|
* @return boolean Was the query successfull? False is returned only if an error occurred
|
|
*/
|
|
public static function e($sql) {
|
|
$a = get_app();
|
|
|
|
$stamp = microtime(true);
|
|
|
|
$params = self::getParam(func_get_args());
|
|
|
|
// In a case of a deadlock we are repeating the query 20 times
|
|
$timeout = 20;
|
|
|
|
do {
|
|
$stmt = self::p($sql, $params);
|
|
|
|
if (is_bool($stmt)) {
|
|
$retval = $stmt;
|
|
} elseif (is_object($stmt)) {
|
|
$retval = true;
|
|
} else {
|
|
$retval = false;
|
|
}
|
|
|
|
self::close($stmt);
|
|
|
|
} while ((self::$errorno == 1213) && (--$timeout > 0));
|
|
|
|
if (self::$errorno != 0) {
|
|
// We have to preserve the error code, somewhere in the logging it get lost
|
|
$error = self::$error;
|
|
$errorno = self::$errorno;
|
|
|
|
logger('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('Giving up because of database error '.$errorno.': '.$error);
|
|
exit(1);
|
|
}
|
|
|
|
self::$error = $error;
|
|
self::$errorno = $errorno;
|
|
}
|
|
|
|
$a->save_timestamp($stamp, "database_write");
|
|
|
|
return $retval;
|
|
}
|
|
|
|
/**
|
|
* @brief Check if data exists
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $condition array of fields for condition
|
|
*
|
|
* @return boolean Are there rows for that condition?
|
|
*/
|
|
public static function exists($table, $condition) {
|
|
if (empty($table)) {
|
|
return false;
|
|
}
|
|
|
|
$fields = [];
|
|
|
|
reset($condition);
|
|
$first_key = key($condition);
|
|
if (!is_int($first_key)) {
|
|
$fields = [$first_key];
|
|
}
|
|
|
|
$stmt = self::select($table, $fields, $condition, ['limit' => 1]);
|
|
|
|
if (is_bool($stmt)) {
|
|
$retval = $stmt;
|
|
} else {
|
|
$retval = (self::num_rows($stmt) > 0);
|
|
}
|
|
|
|
self::close($stmt);
|
|
|
|
return $retval;
|
|
}
|
|
|
|
/**
|
|
* Fetches the first row
|
|
*
|
|
* Please use dba::selectFirst or dba::exists whenever this is possible.
|
|
*
|
|
* @brief Fetches the first row
|
|
* @param string $sql SQL statement
|
|
* @return array first row of query
|
|
*/
|
|
public static function fetch_first($sql) {
|
|
$params = self::getParam(func_get_args());
|
|
|
|
$stmt = self::p($sql, $params);
|
|
|
|
if (is_bool($stmt)) {
|
|
$retval = $stmt;
|
|
} else {
|
|
$retval = self::fetch($stmt);
|
|
}
|
|
|
|
self::close($stmt);
|
|
|
|
return $retval;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the number of affected rows of the last statement
|
|
*
|
|
* @return int Number of rows
|
|
*/
|
|
public static function affected_rows() {
|
|
return self::$affected_rows;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the number of columns of a statement
|
|
*
|
|
* @param object Statement object
|
|
* @return int Number of columns
|
|
*/
|
|
public static function columnCount($stmt) {
|
|
if (!is_object($stmt)) {
|
|
return 0;
|
|
}
|
|
switch (self::$driver) {
|
|
case 'pdo':
|
|
return $stmt->columnCount();
|
|
case 'mysqli':
|
|
return $stmt->field_count;
|
|
}
|
|
return 0;
|
|
}
|
|
/**
|
|
* @brief Returns the number of rows of a statement
|
|
*
|
|
* @param PDOStatement|mysqli_result|mysqli_stmt Statement object
|
|
* @return int Number of rows
|
|
*/
|
|
public static function num_rows($stmt) {
|
|
if (!is_object($stmt)) {
|
|
return 0;
|
|
}
|
|
switch (self::$driver) {
|
|
case 'pdo':
|
|
return $stmt->rowCount();
|
|
case 'mysqli':
|
|
return $stmt->num_rows;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* @brief Fetch a single row
|
|
*
|
|
* @param mixed $stmt statement object
|
|
* @return array current row
|
|
*/
|
|
public static function fetch($stmt) {
|
|
$a = get_app();
|
|
|
|
$stamp1 = microtime(true);
|
|
|
|
$columns = [];
|
|
|
|
if (!is_object($stmt)) {
|
|
return false;
|
|
}
|
|
|
|
switch (self::$driver) {
|
|
case 'pdo':
|
|
$columns = $stmt->fetch(PDO::FETCH_ASSOC);
|
|
break;
|
|
case 'mysqli':
|
|
if (get_class($stmt) == 'mysqli_result') {
|
|
$columns = $stmt->fetch_assoc();
|
|
break;
|
|
}
|
|
|
|
// This code works, but is slow
|
|
|
|
// Bind the result to a result array
|
|
$cols = [];
|
|
|
|
$cols_num = [];
|
|
for ($x = 0; $x < $stmt->field_count; $x++) {
|
|
$cols[] = &$cols_num[$x];
|
|
}
|
|
|
|
call_user_func_array([$stmt, 'bind_result'], $cols);
|
|
|
|
if (!$stmt->fetch()) {
|
|
return false;
|
|
}
|
|
|
|
// The slow part:
|
|
// We need to get the field names for the array keys
|
|
// It seems that there is no better way to do this.
|
|
$result = $stmt->result_metadata();
|
|
$fields = $result->fetch_fields();
|
|
|
|
foreach ($cols_num AS $param => $col) {
|
|
$columns[$fields[$param]->name] = $col;
|
|
}
|
|
}
|
|
|
|
$a->save_timestamp($stamp1, 'database');
|
|
|
|
return $columns;
|
|
}
|
|
|
|
/**
|
|
* @brief Insert a row into a table
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $param parameter array
|
|
* @param bool $on_duplicate_update Do an update on a duplicate entry
|
|
*
|
|
* @return boolean was the insert successfull?
|
|
*/
|
|
public static function insert($table, $param, $on_duplicate_update = false) {
|
|
|
|
if (empty($table) || empty($param)) {
|
|
logger('Table and fields have to be set');
|
|
return false;
|
|
}
|
|
|
|
$sql = "INSERT INTO `".self::escape($table)."` (`".implode("`, `", array_keys($param))."`) VALUES (".
|
|
substr(str_repeat("?, ", count($param)), 0, -2).")";
|
|
|
|
if ($on_duplicate_update) {
|
|
$sql .= " ON DUPLICATE KEY UPDATE `".implode("` = ?, `", array_keys($param))."` = ?";
|
|
|
|
$values = array_values($param);
|
|
$param = array_merge_recursive($values, $values);
|
|
}
|
|
|
|
return self::e($sql, $param);
|
|
}
|
|
|
|
/**
|
|
* @brief Fetch the id of the last insert command
|
|
*
|
|
* @return integer Last inserted id
|
|
*/
|
|
public static function lastInsertId() {
|
|
switch (self::$driver) {
|
|
case 'pdo':
|
|
$id = self::$db->lastInsertId();
|
|
break;
|
|
case 'mysqli':
|
|
$id = self::$db->insert_id;
|
|
break;
|
|
}
|
|
return $id;
|
|
}
|
|
|
|
/**
|
|
* @brief Locks a table for exclusive write access
|
|
*
|
|
* This function can be extended in the future to accept a table array as well.
|
|
*
|
|
* @param string $table Table name
|
|
*
|
|
* @return boolean was the lock successful?
|
|
*/
|
|
public static function lock($table) {
|
|
// See here: https://dev.mysql.com/doc/refman/5.7/en/lock-tables-and-transactions.html
|
|
self::e("SET autocommit=0");
|
|
$success = self::e("LOCK TABLES `".self::escape($table)."` WRITE");
|
|
if (!$success) {
|
|
self::e("SET autocommit=1");
|
|
} else {
|
|
self::$in_transaction = true;
|
|
}
|
|
return $success;
|
|
}
|
|
|
|
/**
|
|
* @brief Unlocks all locked tables
|
|
*
|
|
* @return boolean was the unlock successful?
|
|
*/
|
|
public static function unlock() {
|
|
// See here: https://dev.mysql.com/doc/refman/5.7/en/lock-tables-and-transactions.html
|
|
self::e("COMMIT");
|
|
$success = self::e("UNLOCK TABLES");
|
|
self::e("SET autocommit=1");
|
|
self::$in_transaction = false;
|
|
return $success;
|
|
}
|
|
|
|
/**
|
|
* @brief Starts a transaction
|
|
*
|
|
* @return boolean Was the command executed successfully?
|
|
*/
|
|
public static function transaction() {
|
|
if (!self::e('COMMIT')) {
|
|
return false;
|
|
}
|
|
if (!self::e('START TRANSACTION')) {
|
|
return false;
|
|
}
|
|
self::$in_transaction = true;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Does a commit
|
|
*
|
|
* @return boolean Was the command executed successfully?
|
|
*/
|
|
public static function commit() {
|
|
if (!self::e('COMMIT')) {
|
|
return false;
|
|
}
|
|
self::$in_transaction = false;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief Does a rollback
|
|
*
|
|
* @return boolean Was the command executed successfully?
|
|
*/
|
|
public static function rollback() {
|
|
if (!self::e('ROLLBACK')) {
|
|
return false;
|
|
}
|
|
self::$in_transaction = false;
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* @brief 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 static function buildRelationData() {
|
|
$definition = DBStructure::definition();
|
|
|
|
foreach ($definition AS $table => $structure) {
|
|
foreach ($structure['fields'] AS $field => $field_struct) {
|
|
if (isset($field_struct['relation'])) {
|
|
foreach ($field_struct['relation'] AS $rel_table => $rel_field) {
|
|
self::$relation[$rel_table][$rel_field][$table][] = $field;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Delete a row from a table
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $conditions Field condition(s)
|
|
* @param array $options
|
|
* - cascade: If true we delete records in other tables that depend on the one we're deleting through
|
|
* relations (default: true)
|
|
* @param boolean $in_process Internal use: Only do a commit after the last delete
|
|
* @param array $callstack Internal use: prevent endless loops
|
|
*
|
|
* @return boolean|array was the delete successful? When $in_process is set: deletion data
|
|
*/
|
|
public static function delete($table, array $conditions, array $options = [], $in_process = false, array &$callstack = [])
|
|
{
|
|
if (empty($table) || empty($conditions)) {
|
|
logger('Table and conditions have to be set');
|
|
return false;
|
|
}
|
|
|
|
$commands = [];
|
|
|
|
// Create a key for the loop prevention
|
|
$key = $table . ':' . implode(':', array_keys($conditions)) . ':' . implode(':', $conditions);
|
|
|
|
// We quit when this key already exists in the callstack.
|
|
if (isset($callstack[$key])) {
|
|
return $commands;
|
|
}
|
|
|
|
$callstack[$key] = true;
|
|
|
|
$table = self::escape($table);
|
|
|
|
$commands[$key] = ['table' => $table, 'conditions' => $conditions];
|
|
|
|
$cascade = defaults($options, 'cascade', true);
|
|
|
|
// To speed up the whole process we cache the table relations
|
|
if ($cascade && count(self::$relation) == 0) {
|
|
self::buildRelationData();
|
|
}
|
|
|
|
// Is there a relation entry for the table?
|
|
if ($cascade && isset(self::$relation[$table])) {
|
|
// We only allow a simple "one field" relation.
|
|
$field = array_keys(self::$relation[$table])[0];
|
|
$rel_def = array_values(self::$relation[$table])[0];
|
|
|
|
// Create a key for preventing double queries
|
|
$qkey = $field . '-' . $table . ':' . implode(':', array_keys($conditions)) . ':' . implode(':', $conditions);
|
|
|
|
// When the search field is the relation field, we don't need to fetch the rows
|
|
// This is useful when the leading record is already deleted in the frontend but the rest is done in the backend
|
|
if ((count($conditions) == 1) && ($field == array_keys($conditions)[0])) {
|
|
foreach ($rel_def AS $rel_table => $rel_fields) {
|
|
foreach ($rel_fields AS $rel_field) {
|
|
$retval = self::delete($rel_table, [$rel_field => array_values($conditions)[0]], $options, true, $callstack);
|
|
$commands = array_merge($commands, $retval);
|
|
}
|
|
}
|
|
// We quit when this key already exists in the callstack.
|
|
} elseif (!isset($callstack[$qkey])) {
|
|
|
|
$callstack[$qkey] = true;
|
|
|
|
// Fetch all rows that are to be deleted
|
|
$data = self::select($table, [$field], $conditions);
|
|
|
|
while ($row = self::fetch($data)) {
|
|
// Now we accumulate the delete commands
|
|
$retval = self::delete($table, [$field => $row[$field]], $options, true, $callstack);
|
|
$commands = array_merge($commands, $retval);
|
|
}
|
|
|
|
self::close($data);
|
|
|
|
// Since we had split the delete command we don't need the original command anymore
|
|
unset($commands[$key]);
|
|
}
|
|
}
|
|
|
|
if (!$in_process) {
|
|
// Now we finalize the process
|
|
$do_transaction = !self::$in_transaction;
|
|
|
|
if ($do_transaction) {
|
|
self::transaction();
|
|
}
|
|
|
|
$compacted = [];
|
|
$counter = [];
|
|
|
|
foreach ($commands AS $command) {
|
|
$conditions = $command['conditions'];
|
|
reset($conditions);
|
|
$first_key = key($conditions);
|
|
|
|
$condition_string = self::buildCondition($conditions);
|
|
|
|
if ((count($command['conditions']) > 1) || is_int($first_key)) {
|
|
$sql = "DELETE FROM `" . $command['table'] . "`" . $condition_string;
|
|
logger(self::replaceParameters($sql, $conditions), LOGGER_DATA);
|
|
|
|
if (!self::e($sql, $conditions)) {
|
|
if ($do_transaction) {
|
|
self::rollback();
|
|
}
|
|
return false;
|
|
}
|
|
} else {
|
|
$key_table = $command['table'];
|
|
$key_condition = array_keys($command['conditions'])[0];
|
|
$value = array_values($command['conditions'])[0];
|
|
|
|
// Split the SQL queries in chunks of 100 values
|
|
// We do the $i stuff here to make the code better readable
|
|
$i = $counter[$key_table][$key_condition];
|
|
if (isset($compacted[$key_table][$key_condition][$i]) && count($compacted[$key_table][$key_condition][$i]) > 100) {
|
|
++$i;
|
|
}
|
|
|
|
$compacted[$key_table][$key_condition][$i][$value] = $value;
|
|
$counter[$key_table][$key_condition] = $i;
|
|
}
|
|
}
|
|
foreach ($compacted AS $table => $values) {
|
|
foreach ($values AS $field => $field_value_list) {
|
|
foreach ($field_value_list AS $field_values) {
|
|
$sql = "DELETE FROM `" . $table . "` WHERE `" . $field . "` IN (" .
|
|
substr(str_repeat("?, ", count($field_values)), 0, -2) . ");";
|
|
|
|
logger(self::replaceParameters($sql, $field_values), LOGGER_DATA);
|
|
|
|
if (!self::e($sql, $field_values)) {
|
|
if ($do_transaction) {
|
|
self::rollback();
|
|
}
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if ($do_transaction) {
|
|
self::commit();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
return $commands;
|
|
}
|
|
|
|
/**
|
|
* @brief Updates rows
|
|
*
|
|
* Updates rows in the database. When $old_fields is set to an array,
|
|
* the system will only do an update if the fields in that array changed.
|
|
*
|
|
* Attention:
|
|
* Only the values in $old_fields are compared.
|
|
* This is an intentional behaviour.
|
|
*
|
|
* Example:
|
|
* We include the timestamp field in $fields but not in $old_fields.
|
|
* Then the row will only get the new timestamp when the other fields had changed.
|
|
*
|
|
* When $old_fields is set to a boolean value the system will do this compare itself.
|
|
* When $old_fields is set to "true" the system will do an insert if the row doesn't exists.
|
|
*
|
|
* Attention:
|
|
* Only set $old_fields to a boolean value when you are sure that you will update a single row.
|
|
* When you set $old_fields to "true" then $fields must contain all relevant fields!
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $fields contains the fields that are updated
|
|
* @param array $condition condition array with the key values
|
|
* @param array|boolean $old_fields array with the old field values that are about to be replaced (true = update on duplicate)
|
|
*
|
|
* @return boolean was the update successfull?
|
|
*/
|
|
public static function update($table, $fields, $condition, $old_fields = []) {
|
|
|
|
if (empty($table) || empty($fields) || empty($condition)) {
|
|
logger('Table, fields and condition have to be set');
|
|
return false;
|
|
}
|
|
|
|
$table = self::escape($table);
|
|
|
|
$condition_string = self::buildCondition($condition);
|
|
|
|
if (is_bool($old_fields)) {
|
|
$do_insert = $old_fields;
|
|
|
|
$old_fields = self::selectFirst($table, [], $condition);
|
|
|
|
if (is_bool($old_fields)) {
|
|
if ($do_insert) {
|
|
$values = array_merge($condition, $fields);
|
|
return self::insert($table, $values, $do_insert);
|
|
}
|
|
$old_fields = [];
|
|
}
|
|
}
|
|
|
|
$do_update = (count($old_fields) == 0);
|
|
|
|
foreach ($old_fields AS $fieldname => $content) {
|
|
if (isset($fields[$fieldname])) {
|
|
if ($fields[$fieldname] == $content) {
|
|
unset($fields[$fieldname]);
|
|
} else {
|
|
$do_update = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!$do_update || (count($fields) == 0)) {
|
|
return true;
|
|
}
|
|
|
|
$sql = "UPDATE `".$table."` SET `".
|
|
implode("` = ?, `", array_keys($fields))."` = ?".$condition_string;
|
|
|
|
$params1 = array_values($fields);
|
|
$params2 = array_values($condition);
|
|
$params = array_merge_recursive($params1, $params2);
|
|
|
|
return self::e($sql, $params);
|
|
}
|
|
|
|
/**
|
|
* Retrieve a single record from a table and returns it in an associative array
|
|
*
|
|
* @brief Retrieve a single record from a table
|
|
* @param string $table
|
|
* @param array $fields
|
|
* @param array $condition
|
|
* @param array $params
|
|
* @return bool|array
|
|
* @see dba::select
|
|
*/
|
|
public static function selectFirst($table, array $fields = [], array $condition = [], $params = [])
|
|
{
|
|
$params['limit'] = 1;
|
|
$result = self::select($table, $fields, $condition, $params);
|
|
|
|
if (is_bool($result)) {
|
|
return $result;
|
|
} else {
|
|
$row = self::fetch($result);
|
|
self::close($result);
|
|
return $row;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Select rows from a table
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $fields Array of selected fields, empty for all
|
|
* @param array $condition Array of fields for condition
|
|
* @param array $params Array of several parameters
|
|
*
|
|
* @return boolean|object
|
|
*
|
|
* Example:
|
|
* $table = "item";
|
|
* $fields = array("id", "uri", "uid", "network");
|
|
*
|
|
* $condition = array("uid" => 1, "network" => 'dspr');
|
|
* or:
|
|
* $condition = array("`uid` = ? AND `network` IN (?, ?)", 1, 'dfrn', 'dspr');
|
|
*
|
|
* $params = array("order" => array("id", "received" => true), "limit" => 10);
|
|
*
|
|
* $data = dba::select($table, $fields, $condition, $params);
|
|
*/
|
|
public static function select($table, array $fields = [], array $condition = [], array $params = [])
|
|
{
|
|
if ($table == '') {
|
|
return false;
|
|
}
|
|
|
|
$table = self::escape($table);
|
|
|
|
if (count($fields) > 0) {
|
|
$select_fields = "`" . implode("`, `", array_values($fields)) . "`";
|
|
} else {
|
|
$select_fields = "*";
|
|
}
|
|
|
|
$condition_string = self::buildCondition($condition);
|
|
|
|
$param_string = self::buildParameter($params);
|
|
|
|
$sql = "SELECT " . $select_fields . " FROM `" . $table . "`" . $condition_string . $param_string;
|
|
|
|
$result = self::p($sql, $condition);
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* @brief Counts the rows from a table satisfying the provided condition
|
|
*
|
|
* @param string $table Table name
|
|
* @param array $condition array of fields for condition
|
|
*
|
|
* @return int
|
|
*
|
|
* Example:
|
|
* $table = "item";
|
|
*
|
|
* $condition = ["uid" => 1, "network" => 'dspr'];
|
|
* or:
|
|
* $condition = ["`uid` = ? AND `network` IN (?, ?)", 1, 'dfrn', 'dspr'];
|
|
*
|
|
* $count = dba::count($table, $condition);
|
|
*/
|
|
public static function count($table, array $condition = [])
|
|
{
|
|
if ($table == '') {
|
|
return false;
|
|
}
|
|
|
|
$condition_string = self::buildCondition($condition);
|
|
|
|
$sql = "SELECT COUNT(*) AS `count` FROM `".$table."`".$condition_string;
|
|
|
|
$row = self::fetch_first($sql, $condition);
|
|
|
|
return $row['count'];
|
|
}
|
|
|
|
/**
|
|
* @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;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the SQL parameter string built from the provided parameter array
|
|
*
|
|
* @param array $params
|
|
* @return string
|
|
*/
|
|
public static function buildParameter(array $params = [])
|
|
{
|
|
$order_string = '';
|
|
if (isset($params['order'])) {
|
|
$order_string = " ORDER BY ";
|
|
foreach ($params['order'] AS $fields => $order) {
|
|
if (!is_int($fields)) {
|
|
$order_string .= "`" . $fields . "` " . ($order ? "DESC" : "ASC") . ", ";
|
|
} else {
|
|
$order_string .= "`" . $order . "`, ";
|
|
}
|
|
}
|
|
$order_string = substr($order_string, 0, -2);
|
|
}
|
|
|
|
$limit_string = '';
|
|
if (isset($params['limit']) && is_int($params['limit'])) {
|
|
$limit_string = " LIMIT " . $params['limit'];
|
|
}
|
|
|
|
if (isset($params['limit']) && is_array($params['limit'])) {
|
|
$limit_string = " LIMIT " . intval($params['limit'][0]) . ", " . intval($params['limit'][1]);
|
|
}
|
|
|
|
return $order_string.$limit_string;
|
|
}
|
|
|
|
/**
|
|
* @brief Fills an array with data from a query
|
|
*
|
|
* @param object $stmt statement object
|
|
* @return array Data array
|
|
*/
|
|
public static function inArray($stmt, $do_close = true) {
|
|
if (is_bool($stmt)) {
|
|
return $stmt;
|
|
}
|
|
|
|
$data = [];
|
|
while ($row = self::fetch($stmt)) {
|
|
$data[] = $row;
|
|
}
|
|
if ($do_close) {
|
|
self::close($stmt);
|
|
}
|
|
return $data;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the error number of the last query
|
|
*
|
|
* @return string Error number (0 if no error)
|
|
*/
|
|
public static function errorNo() {
|
|
return self::$errorno;
|
|
}
|
|
|
|
/**
|
|
* @brief Returns the error message of the last query
|
|
*
|
|
* @return string Error message ('' if no error)
|
|
*/
|
|
public static function errorMessage() {
|
|
return self::$error;
|
|
}
|
|
|
|
/**
|
|
* @brief Closes the current statement
|
|
*
|
|
* @param object $stmt statement object
|
|
* @return boolean was the close successful?
|
|
*/
|
|
public static function close($stmt) {
|
|
$a = get_app();
|
|
|
|
$stamp1 = microtime(true);
|
|
|
|
if (!is_object($stmt)) {
|
|
return false;
|
|
}
|
|
|
|
switch (self::$driver) {
|
|
case 'pdo':
|
|
$ret = $stmt->closeCursor();
|
|
break;
|
|
case 'mysqli':
|
|
// MySQLi offers both a mysqli_stmt and a mysqli_result class.
|
|
// We should be careful not to assume the object type of $stmt
|
|
// because dba::p() has been able to return both types.
|
|
if ($stmt instanceof mysqli_stmt) {
|
|
$stmt->free_result();
|
|
$ret = $stmt->close();
|
|
} elseif ($stmt instanceof mysqli_result) {
|
|
$stmt->free();
|
|
$ret = true;
|
|
} else {
|
|
$ret = false;
|
|
}
|
|
break;
|
|
}
|
|
|
|
$a->save_timestamp($stamp1, 'database');
|
|
|
|
return $ret;
|
|
}
|
|
}
|
|
|
|
function dbesc($str) {
|
|
if (dba::$connected) {
|
|
return(dba::escape($str));
|
|
} else {
|
|
return(str_replace("'","\\'",$str));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief execute SQL query with printf style args - deprecated
|
|
*
|
|
* Please use the dba:: functions instead:
|
|
* dba::select, dba::exists, dba::insert
|
|
* dba::delete, dba::update, dba::p, dba::e
|
|
*
|
|
* @param $args Query parameters (1 to N parameters of different types)
|
|
* @return array|bool Query array
|
|
*/
|
|
function q($sql) {
|
|
$args = func_get_args();
|
|
unset($args[0]);
|
|
|
|
if (!dba::$connected) {
|
|
return false;
|
|
}
|
|
|
|
$sql = dba::clean_query($sql);
|
|
$sql = dba::any_value_fallback($sql);
|
|
|
|
$stmt = @vsprintf($sql, $args);
|
|
|
|
$ret = dba::p($stmt);
|
|
|
|
if (is_bool($ret)) {
|
|
return $ret;
|
|
}
|
|
|
|
$columns = dba::columnCount($ret);
|
|
|
|
$data = dba::inArray($ret);
|
|
|
|
if ((count($data) == 0) && ($columns == 0)) {
|
|
return true;
|
|
}
|
|
|
|
return $data;
|
|
}
|
|
|
|
function dba_timer() {
|
|
return microtime(true);
|
|
}
|