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<?php
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/*
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 * OIDplus 2.0
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 * Copyright 2019 - 2023 Daniel Marschall, ViaThinkSoft
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 *
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 * Licensed under the Apache License, Version 2.0 (the "License");
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 * you may not use this file except in compliance with the License.
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 * You may obtain a copy of the License at
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 *
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 *     http://www.apache.org/licenses/LICENSE-2.0
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 *
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 * Unless required by applicable law or agreed to in writing, software
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 * distributed under the License is distributed on an "AS IS" BASIS,
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 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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 * See the License for the specific language governing permissions and
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 * limitations under the License.
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 */
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namespace ViaThinkSoft\OIDplus;
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// phpcs:disable PSR1.Files.SideEffects
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\defined('INSIDE_OIDPLUS') or die;
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// phpcs:enable PSR1.Files.SideEffects
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class OIDplusSqlSlangPluginMySQL extends OIDplusSqlSlangPlugin {
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        public static function id(): string {
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                return 'mysql';
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        }
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        public function natOrder($fieldname, $order='asc'): string {
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                $order = strtolower($order);
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                if (($order != 'asc') && ($order != 'desc')) {
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                        throw new OIDplusException(_L('Invalid order "%1" (needs to be "asc" or "desc")',$order));
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                }
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                $out = array();
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                $max_arc_len = OIDplus::baseConfig()->getValue('LIMITS_MAX_OID_ARC_SIZE') > 65 ? 65 : OIDplus::baseConfig()->getValue('LIMITS_MAX_OID_ARC_SIZE'); // Limit of "decimal()" type
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                // 1. sort by namespace (oid, guid, ...)
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                $out[] = "SUBSTRING_INDEX($fieldname,':',1) $order";
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                // 2. sort by first arc (0,1,2)
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                $out[] = "SUBSTRING(SUBSTRING_INDEX($fieldname,'.',1), LENGTH(SUBSTRING_INDEX($fieldname,':',1))+2, $max_arc_len) $order";
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                for ($i=2; $i<=OIDplus::baseConfig()->getValue('LIMITS_MAX_OID_DEPTH'); $i++) {
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                        // 3. Sort by the rest arcs one by one, not that MySQL can only handle decimal(65), not decimal($max_arc_len)
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                        $out[] = "cast(SUBSTRING(SUBSTRING_INDEX($fieldname,'.',$i), LENGTH(SUBSTRING_INDEX($fieldname,'.',".($i-1)."))+2, $max_arc_len) as decimal($max_arc_len)) $order";
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                }
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                // 4. as last resort, sort by the identifier itself, e.g. if the casts above did fail (happens if it is not an OID)
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                $out[] = "$fieldname $order";
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                return implode(', ', $out);
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        }
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        public function sqlDate(): string {
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                return 'now()';
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        }
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        public function detect(OIDplusDatabaseConnection $db): bool {
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                try {
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                        $vers = $db->query("select version() as dbms_version")->fetch_object()->dbms_version;
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                        $vers = strtolower($vers);
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                        return (strpos($vers, 'mysql') !== false) || (strpos($vers, 'mariadb') !== false);
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                } catch (\Exception $e) {
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                        return false;
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                }
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        }
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        public function insert_id(OIDplusDatabaseConnection $db): int {
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                $res = $db->query("SELECT LAST_INSERT_ID() AS ID");
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                $row = $res->fetch_array();
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                return (int)$row['ID'];
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        }
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        public function setupSetTablePrefix($cont, $table, $prefix): string {
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                $cont = str_replace('`'.$table.'`', '`'.$prefix.$table.'`', $cont);
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                return $cont;
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        }
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        public function setupCreateDbIfNotExists($database): string {
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                return "CREATE DATABASE IF NOT EXISTS `$database`;\n\n";
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        }
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        public function setupUseDatabase($database): string {
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                return "USE `$database`;\n\n";
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        }
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        public function isNullFunction($expr1, $expr2): string {
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                return "ifnull($expr1, $expr2)";
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        }
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        public function filterQuery($sql): string {
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                return $sql;
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        }
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        public function getSQLBool($bool): string {
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                return $bool ? '1' : '0';
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        }
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        public function escapeString($str): string {
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                return str_replace("'", "''", $str);
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        }
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}