869 lines
22 KiB
PHP
869 lines
22 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Database;
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use Friendica\DI;
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use mysqli;
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use mysqli_result;
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use mysqli_stmt;
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use PDO;
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use PDOStatement;
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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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{
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/**
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* Lowest possible date value
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*/
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const NULL_DATE = '0001-01-01';
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/**
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* Lowest possible datetime value
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*/
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const NULL_DATETIME = '0001-01-01 00:00:00';
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public static function connect()
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{
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return DI::dba()->connect();
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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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DI::dba()->disconnect();
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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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{
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return DI::dba()->reconnect();
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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 getConnection()
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{
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return DI::dba()->getConnection();
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}
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/**
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* Return the database driver string
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*
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* @return string with either "pdo" or "mysqli"
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*/
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public static function getDriver()
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{
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return DI::dba()->getDriver();
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}
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/**
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* 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 serverInfo()
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{
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return DI::dba()->serverInfo();
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}
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/**
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* Returns the selected database name
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*
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* @return string
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* @throws \Exception
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*/
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public static function databaseName()
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{
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return DI::dba()->databaseName();
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}
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/**
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* Escape all SQL unsafe data
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*
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* @param string $str
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* @return string escaped string
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*/
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public static function escape($str)
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{
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return DI::dba()->escape($str);
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}
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/**
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* Checks if the database is connected
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*
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* @return boolean is the database connected?
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*/
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public static function connected()
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{
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return DI::dba()->connected();
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}
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/**
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* 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 $sql An SQL string without the values
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* @return string The input SQL string modified if necessary.
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*/
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public static function anyValueFallback($sql)
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{
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return DI::dba()->anyValueFallback($sql);
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}
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/**
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* 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 $sql An SQL string without the values
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* @return string The input SQL string modified if necessary.
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*/
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public static function cleanQuery($sql)
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{
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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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* Convert parameter array to an universal form
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* @param array $args Parameter array
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* @return array universalized parameter array
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*/
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public static function getParam($args)
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{
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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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* Executes a prepared statement that returns data
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* Example: $r = p("SELECT * FROM `post` 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 $sql SQL statement
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* @return bool|object statement object or result object
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* @throws \Exception
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*/
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public static function p($sql)
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{
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$params = self::getParam(func_get_args());
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return DI::dba()->p($sql, $params);
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}
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/**
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* Executes a prepared statement like UPDATE or INSERT that doesn't return data
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*
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* Please use DBA::delete, DBA::insert, DBA::update, ... instead
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*
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* @param string $sql SQL statement
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* @return boolean Was the query successfull? False is returned only if an error occurred
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* @throws \Exception
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*/
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public static function e($sql) {
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$params = self::getParam(func_get_args());
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return DI::dba()->e($sql, $params);
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}
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/**
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* Check if data exists
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*
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* @param string|array $table Table name or array [schema => table]
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* @param array $condition array of fields for condition
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*
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* @return boolean Are there rows for that condition?
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* @throws \Exception
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*/
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public static function exists($table, $condition)
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{
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return DI::dba()->exists($table, $condition);
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}
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/**
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* Fetches the first row
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*
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* Please use DBA::selectFirst or DBA::exists whenever this is possible.
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*
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* @param string $sql SQL statement
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* @return array first row of query
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* @throws \Exception
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*/
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public static function fetchFirst($sql)
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{
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$params = self::getParam(func_get_args());
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return DI::dba()->fetchFirst($sql, $params);
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}
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/**
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* Returns the number of affected rows of the last statement
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*
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* @return int Number of rows
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*/
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public static function affectedRows()
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{
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return DI::dba()->affectedRows();
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}
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/**
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* Returns the number of columns of a statement
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*
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* @param object Statement object
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* @return int Number of columns
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*/
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public static function columnCount($stmt)
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{
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return DI::dba()->columnCount($stmt);
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}
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/**
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* Returns the number of rows of a statement
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*
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* @param PDOStatement|mysqli_result|mysqli_stmt Statement object
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* @return int Number of rows
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*/
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public static function numRows($stmt)
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{
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return DI::dba()->numRows($stmt);
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}
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/**
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* Fetch a single row
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*
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* @param mixed $stmt statement object
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* @return array current row
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*/
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public static function fetch($stmt)
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{
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return DI::dba()->fetch($stmt);
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}
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/**
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* Insert a row into a table
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*
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* @param string|array $table Table name or array [schema => table]
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* @param array $param parameter array
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* @param int $duplicate_mode What to do on a duplicated entry
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*
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* @return boolean was the insert successful?
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* @throws \Exception
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*/
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public static function insert($table, array $param, int $duplicate_mode = Database::INSERT_DEFAULT)
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{
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return DI::dba()->insert($table, $param, $duplicate_mode);
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}
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/**
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* Inserts a row with the provided data in the provided table.
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* If the data corresponds to an existing row through a UNIQUE or PRIMARY index constraints, it updates the row instead.
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*
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* @param string|array $table Table name or array [schema => table]
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* @param array $param parameter array
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*
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* @return boolean was the insert successful?
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* @throws \Exception
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*/
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public static function replace($table, $param)
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{
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return DI::dba()->replace($table, $param);
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}
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/**
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* Fetch the id of the last insert command
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*
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* @return integer Last inserted id
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*/
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public static function lastInsertId()
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{
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return DI::dba()->lastInsertId();
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}
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/**
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* Locks a table for exclusive write access
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*
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* This function can be extended in the future to accept a table array as well.
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*
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* @param string|array $table Table name or array [schema => table]
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*
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* @return boolean was the lock successful?
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* @throws \Exception
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*/
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public static function lock($table)
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{
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return DI::dba()->lock($table);
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}
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/**
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* Unlocks all locked tables
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*
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* @return boolean was the unlock successful?
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* @throws \Exception
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*/
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public static function unlock()
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{
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return DI::dba()->unlock();
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}
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/**
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* Starts a transaction
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*
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* @return boolean Was the command executed successfully?
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*/
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public static function transaction()
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{
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return DI::dba()->transaction();
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}
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/**
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* Does a commit
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*
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* @return boolean Was the command executed successfully?
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*/
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public static function commit()
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{
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return DI::dba()->commit();
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}
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/**
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* Does a rollback
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*
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* @return boolean Was the command executed successfully?
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*/
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public static function rollback()
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{
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return DI::dba()->rollback();
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}
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/**
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* Delete a row from a table
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*
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* @param string|array $table Table name
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* @param array $conditions Field condition(s)
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*
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* @return boolean was the delete successful?
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* @throws \Exception
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*/
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public static function delete($table, array $conditions, array $options = [])
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{
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return DI::dba()->delete($table, $conditions, $options);
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}
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/**
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* Updates rows in the database.
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*
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* When $old_fields is set to an array,
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* the system will only do an update if the fields in that array changed.
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*
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* Attention:
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* Only the values in $old_fields are compared.
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* This is an intentional behaviour.
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*
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* Example:
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* We include the timestamp field in $fields but not in $old_fields.
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* Then the row will only get the new timestamp when the other fields had changed.
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*
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* When $old_fields is set to a boolean value the system will do this compare itself.
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* When $old_fields is set to "true" the system will do an insert if the row doesn't exists.
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*
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* Attention:
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* Only set $old_fields to a boolean value when you are sure that you will update a single row.
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* When you set $old_fields to "true" then $fields must contain all relevant fields!
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*
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* @param string|array $table Table name or array [schema => table]
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* @param array $fields contains the fields that are updated
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* @param array $condition condition array with the key values
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* @param array|boolean $old_fields array with the old field values that are about to be replaced (true = update on duplicate)
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*
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* @return boolean was the update successfull?
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* @throws \Exception
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*/
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public static function update($table, $fields, $condition, $old_fields = [])
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{
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return DI::dba()->update($table, $fields, $condition, $old_fields);
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}
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/**
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* Retrieve a single record from a table and returns it in an associative array
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*
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* @param string|array $table Table name or array [schema => table]
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* @param array $fields
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* @param array $condition
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* @param array $params
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* @return bool|array
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* @throws \Exception
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* @see self::select
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*/
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public static function selectFirst($table, array $fields = [], array $condition = [], $params = [])
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{
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return DI::dba()->selectFirst($table, $fields, $condition, $params);
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}
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/**
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* Select rows from a table and fills an array with the data
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*
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* @param string|array $table Table name or array [schema => table]
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* @param array $fields Array of selected fields, empty for all
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* @param array $condition Array of fields for condition
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* @param array $params Array of several parameters
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*
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* @return array Data array
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* @throws \Exception
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* @see self::select
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*/
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public static function selectToArray($table, array $fields = [], array $condition = [], array $params = [])
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{
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return DI::dba()->selectToArray($table, $fields, $condition, $params);
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}
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/**
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* Select rows from a table
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*
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* @param string|array $table Table name or array [schema => table]
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* @param array $fields Array of selected fields, empty for all
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* @param array $condition Array of fields for condition
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* @param array $params Array of several parameters
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*
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* @return boolean|object
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*
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* Example:
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* $table = "post";
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* $fields = array("id", "uri", "uid", "network");
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*
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* $condition = array("uid" => 1, "network" => 'dspr');
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* or:
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* $condition = array("`uid` = ? AND `network` IN (?, ?)", 1, 'dfrn', 'dspr');
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*
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* $params = array("order" => array("id", "received" => true), "limit" => 10);
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*
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* $data = DBA::select($table, $fields, $condition, $params);
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* @throws \Exception
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*/
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public static function select($table, array $fields = [], array $condition = [], array $params = [])
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{
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return DI::dba()->select($table, $fields, $condition, $params);
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}
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/**
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* Counts the rows from a table satisfying the provided condition
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*
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* @param string|array $table Table name or array [schema => table]
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* @param array $condition array of fields for condition
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* @param array $params Array of several parameters
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*
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* @return int
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*
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* Example:
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* $table = "post";
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*
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* $condition = ["uid" => 1, "network" => 'dspr'];
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* or:
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* $condition = ["`uid` = ? AND `network` IN (?, ?)", 1, 'dfrn', 'dspr'];
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*
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* $count = DBA::count($table, $condition);
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* @throws \Exception
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*/
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public static function count($table, array $condition = [], array $params = [])
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{
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return DI::dba()->count($table, $condition, $params);
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}
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/**
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* Build the table query substring from one or more tables, with or without a schema.
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*
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* Expected formats:
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* - table
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* - [table1, table2, ...]
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* - [schema1 => table1, schema2 => table2, table3, ...]
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*
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* @param string|array $tables
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* @return string
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*/
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public static function buildTableString($tables)
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{
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if (is_string($tables)) {
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$tables = [$tables];
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}
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$quotedTables = [];
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foreach ($tables as $schema => $table) {
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if (is_numeric($schema)) {
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$quotedTables[] = self::quoteIdentifier($table);
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} else {
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$quotedTables[] = self::quoteIdentifier($schema) . '.' . self::quoteIdentifier($table);
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}
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}
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return implode(', ', $quotedTables);
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}
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/**
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* Escape an identifier (table or field name)
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*
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* @param $identifier
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* @return string
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*/
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public static function quoteIdentifier($identifier)
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{
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return '`' . str_replace('`', '``', $identifier) . '`';
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}
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|
|
/**
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* Returns the SQL condition string built from the provided condition array
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*
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* This function operates with two modes.
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* - Supplied with a field/value associative array, it builds simple strict
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* equality conditions linked by AND.
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* - Supplied with a flat list, the first element is the condition string and
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* the following arguments are the values to be interpolated
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*
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* $condition = ["uid" => 1, "network" => 'dspr'];
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* or:
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* $condition = ["`uid` = ? AND `network` IN (?, ?)", 1, 'dfrn', 'dspr'];
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*
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* In either case, the provided array is left with the parameters only
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*
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* @param array $condition
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* @return string
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*/
|
|
public static function buildCondition(array &$condition = [])
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{
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$condition = self::collapseCondition($condition);
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$condition_string = '';
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if (count($condition) > 0) {
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$condition_string = " WHERE (" . array_shift($condition) . ")";
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}
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|
|
return $condition_string;
|
|
}
|
|
|
|
/**
|
|
* Collapse an associative array condition into a SQL string + parameters condition array.
|
|
*
|
|
* ['uid' => 1, 'network' => ['dspr', 'apub']]
|
|
*
|
|
* gets transformed into
|
|
*
|
|
* ["`uid` = ? AND `network` IN (?, ?)", 1, 'dspr', 'apub']
|
|
*
|
|
* @param array $condition
|
|
* @return array
|
|
*/
|
|
public static function collapseCondition(array $condition)
|
|
{
|
|
// Ensures an always true condition is returned
|
|
if (count($condition) < 1) {
|
|
return ['1'];
|
|
}
|
|
|
|
reset($condition);
|
|
$first_key = key($condition);
|
|
|
|
if (is_int($first_key)) {
|
|
// Already collapsed
|
|
return $condition;
|
|
}
|
|
|
|
$values = [];
|
|
$condition_string = "";
|
|
foreach ($condition as $field => $value) {
|
|
if ($condition_string != "") {
|
|
$condition_string .= " AND ";
|
|
}
|
|
|
|
if (is_array($value)) {
|
|
if (count($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.
|
|
}
|
|
|
|
$values = array_merge($values, array_values($value));
|
|
$placeholders = substr(str_repeat("?, ", count($value)), 0, -2);
|
|
$condition_string .= self::quoteIdentifier($field) . " IN (" . $placeholders . ")";
|
|
} else {
|
|
// Empty value array isn't supported by IN and is logically equivalent to no match
|
|
$condition_string .= "FALSE";
|
|
}
|
|
} elseif (is_null($value)) {
|
|
$condition_string .= self::quoteIdentifier($field) . " IS NULL";
|
|
} else {
|
|
$values[$field] = $value;
|
|
$condition_string .= self::quoteIdentifier($field) . " = ?";
|
|
}
|
|
}
|
|
|
|
$condition = array_merge([$condition_string], array_values($values));
|
|
|
|
return $condition;
|
|
}
|
|
|
|
/**
|
|
* Merges the provided conditions into a single collapsed one
|
|
*
|
|
* @param array ...$conditions One or more condition arrays
|
|
* @return array A collapsed condition
|
|
* @see DBA::collapseCondition() for the condition array formats
|
|
*/
|
|
public static function mergeConditions(array ...$conditions)
|
|
{
|
|
if (count($conditions) == 1) {
|
|
return current($conditions);
|
|
}
|
|
|
|
$conditionStrings = [];
|
|
$result = [];
|
|
|
|
foreach ($conditions as $key => $condition) {
|
|
if (!$condition) {
|
|
continue;
|
|
}
|
|
|
|
$condition = self::collapseCondition($condition);
|
|
|
|
$conditionStrings[] = array_shift($condition);
|
|
// The result array holds the eventual parameter values
|
|
$result = array_merge($result, $condition);
|
|
}
|
|
|
|
if (count($conditionStrings)) {
|
|
// We prepend the condition string at the end to form a collapsed condition array again
|
|
array_unshift($result, implode(' AND ', $conditionStrings));
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
|
|
/**
|
|
* Returns the SQL parameter string built from the provided parameter array
|
|
*
|
|
* Expected format for each key:
|
|
*
|
|
* group_by:
|
|
* - list of column names
|
|
*
|
|
* order:
|
|
* - numeric keyed column name => ASC
|
|
* - associative element with boolean value => DESC (true), ASC (false)
|
|
* - associative element with string value => 'ASC' or 'DESC' literally
|
|
*
|
|
* limit:
|
|
* - single numeric value => count
|
|
* - list with two numeric values => offset, count
|
|
*
|
|
* @param array $params
|
|
* @return string
|
|
*/
|
|
public static function buildParameter(array $params = [])
|
|
{
|
|
$groupby_string = '';
|
|
if (!empty($params['group_by'])) {
|
|
$groupby_string = " GROUP BY " . implode(', ', array_map(['self', 'quoteIdentifier'], $params['group_by']));
|
|
}
|
|
|
|
$order_string = '';
|
|
if (isset($params['order'])) {
|
|
$order_string = " ORDER BY ";
|
|
foreach ($params['order'] AS $fields => $order) {
|
|
if ($order === 'RAND()') {
|
|
$order_string .= "RAND(), ";
|
|
} elseif (!is_int($fields)) {
|
|
if ($order !== 'DESC' && $order !== 'ASC') {
|
|
$order = $order ? 'DESC' : 'ASC';
|
|
}
|
|
|
|
$order_string .= self::quoteIdentifier($fields) . " " . $order . ", ";
|
|
} else {
|
|
$order_string .= self::quoteIdentifier($order) . ", ";
|
|
}
|
|
}
|
|
$order_string = substr($order_string, 0, -2);
|
|
}
|
|
|
|
$limit_string = '';
|
|
if (isset($params['limit']) && is_numeric($params['limit'])) {
|
|
$limit_string = " LIMIT " . intval($params['limit']);
|
|
}
|
|
|
|
if (isset($params['limit']) && is_array($params['limit'])) {
|
|
$limit_string = " LIMIT " . intval($params['limit'][0]) . ", " . intval($params['limit'][1]);
|
|
}
|
|
|
|
return $groupby_string . $order_string . $limit_string;
|
|
}
|
|
|
|
/**
|
|
* Fills an array with data from a query
|
|
*
|
|
* @param object $stmt statement object
|
|
* @param bool $do_close Close database connection after last row
|
|
* @param int $count maximum number of rows to be fetched
|
|
*
|
|
* @return array Data array
|
|
*/
|
|
public static function toArray($stmt, $do_close = true, int $count = 0)
|
|
{
|
|
return DI::dba()->toArray($stmt, $do_close, $count);
|
|
}
|
|
|
|
/**
|
|
* Cast field types according to the table definition
|
|
*
|
|
* @param string $table
|
|
* @param array $fields
|
|
* @return array casted fields
|
|
*/
|
|
public static function castFields(string $table, array $fields)
|
|
{
|
|
return DI::dba()->castFields($table, $fields);
|
|
}
|
|
|
|
/**
|
|
* Returns the error number of the last query
|
|
*
|
|
* @return string Error number (0 if no error)
|
|
*/
|
|
public static function errorNo()
|
|
{
|
|
return DI::dba()->errorNo();
|
|
}
|
|
|
|
/**
|
|
* Returns the error message of the last query
|
|
*
|
|
* @return string Error message ('' if no error)
|
|
*/
|
|
public static function errorMessage()
|
|
{
|
|
return DI::dba()->errorMessage();
|
|
}
|
|
|
|
/**
|
|
* Closes the current statement
|
|
*
|
|
* @param object $stmt statement object
|
|
* @return boolean was the close successful?
|
|
*/
|
|
public static function close($stmt)
|
|
{
|
|
return DI::dba()->close($stmt);
|
|
}
|
|
|
|
/**
|
|
* Return a list of database processes
|
|
*
|
|
* @return array
|
|
* 'list' => List of processes, separated in their different states
|
|
* 'amount' => Number of concurrent database processes
|
|
* @throws \Exception
|
|
*/
|
|
public static function processlist()
|
|
{
|
|
return DI::dba()->processlist();
|
|
}
|
|
|
|
/**
|
|
* Fetch a database variable
|
|
*
|
|
* @param string $name
|
|
* @return string content
|
|
*/
|
|
public static function getVariable(string $name)
|
|
{
|
|
return DI::dba()->getVariable($name);
|
|
}
|
|
|
|
/**
|
|
* Checks if $array is a filled array with at least one entry.
|
|
*
|
|
* @param mixed $array A filled array with at least one entry
|
|
*
|
|
* @return boolean Whether $array is a filled array or an object with rows
|
|
*/
|
|
public static function isResult($array)
|
|
{
|
|
return DI::dba()->isResult($array);
|
|
}
|
|
|
|
/**
|
|
* Escapes a whole array
|
|
*
|
|
* @param mixed $arr Array with values to be escaped
|
|
* @param boolean $add_quotation add quotation marks for string values
|
|
* @return void
|
|
*/
|
|
public static function escapeArray(&$arr, $add_quotation = false)
|
|
{
|
|
DI::dba()->escapeArray($arr, $add_quotation);
|
|
}
|
|
}
|