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  1. <?php
  2.  
  3. /*
  4.  * OIDplus 2.0
  5.  * Copyright 2019 - 2021 Daniel Marschall, ViaThinkSoft
  6.  *
  7.  * Licensed under the Apache License, Version 2.0 (the "License");
  8.  * you may not use this file except in compliance with the License.
  9.  * You may obtain a copy of the License at
  10.  *
  11.  *     http://www.apache.org/licenses/LICENSE-2.0
  12.  *
  13.  * Unless required by applicable law or agreed to in writing, software
  14.  * distributed under the License is distributed on an "AS IS" BASIS,
  15.  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16.  * See the License for the specific language governing permissions and
  17.  * limitations under the License.
  18.  */
  19.  
  20. namespace ViaThinkSoft\OIDplus;
  21.  
  22. class OIDplusSqlSlangPluginMySQL extends OIDplusSqlSlangPlugin {
  23.  
  24.         public static function id(): string {
  25.                 return 'mysql';
  26.         }
  27.  
  28.         public function natOrder($fieldname, $order='asc'): string {
  29.  
  30.                 $order = strtolower($order);
  31.                 if (($order != 'asc') && ($order != 'desc')) {
  32.                         throw new OIDplusException(_L('Invalid order "%1" (needs to be "asc" or "desc")',$order));
  33.                 }
  34.  
  35.                 $out = array();
  36.  
  37.                 $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
  38.  
  39.                 // 1. sort by namespace (oid, guid, ...)
  40.                 $out[] = "SUBSTRING_INDEX($fieldname,':',1) $order";
  41.  
  42.                 // 2. sort by first arc (0,1,2)
  43.                 $out[] = "SUBSTRING(SUBSTRING_INDEX($fieldname,'.',1), LENGTH(SUBSTRING_INDEX($fieldname,':',1))+2, $max_arc_len) $order";
  44.  
  45.                 for ($i=2; $i<=OIDplus::baseConfig()->getValue('LIMITS_MAX_OID_DEPTH'); $i++) {
  46.                         // 3. Sort by the rest arcs one by one, not that MySQL can only handle decimal(65), not decimal($max_arc_len)
  47.                         $out[] = "cast(SUBSTRING(SUBSTRING_INDEX($fieldname,'.',$i), LENGTH(SUBSTRING_INDEX($fieldname,'.',".($i-1)."))+2, $max_arc_len) as decimal($max_arc_len)) $order";
  48.                 }
  49.  
  50.                 // 4. as last resort, sort by the identifier itself, e.g. if the casts above did fail (happens if it is not an OID)
  51.                 $out[] = "$fieldname $order";
  52.  
  53.                 return implode(', ', $out);
  54.  
  55.         }
  56.  
  57.         public function sqlDate(): string {
  58.                 return 'now()';
  59.         }
  60.  
  61.         public function detect(OIDplusDatabaseConnection $db): bool {
  62.                 try {
  63.                         $vers = $db->query("select version() as dbms_version")->fetch_object()->dbms_version;
  64.                         $vers = strtolower($vers);
  65.                         return (strpos($vers, 'mysql') !== false) || (strpos($vers, 'mariadb') !== false);
  66.                 } catch (\Exception $e) {
  67.                         return false;
  68.                 }
  69.         }
  70.  
  71.         public function insert_id(OIDplusDatabaseConnection $db): int {
  72.                 $res = $db->query("SELECT LAST_INSERT_ID() AS ID");
  73.                 $row = $res->fetch_array();
  74.                 return (int)$row['ID'];
  75.         }
  76.  
  77.  
  78.         public function setupSetTablePrefix($cont, $table, $prefix): string {
  79.                 $cont = str_replace('`'.$table.'`', '`'.$prefix.$table.'`', $cont);
  80.                 return $cont;
  81.         }
  82.  
  83.         public function setupCreateDbIfNotExists($database): string {
  84.                 return "CREATE DATABASE IF NOT EXISTS `$database`;\n\n";
  85.         }
  86.  
  87.         public function setupUseDatabase($database): string {
  88.                 return "USE `$database`;\n\n";
  89.         }
  90.  
  91.         public function isNullFunction($expr1, $expr2): string {
  92.                 return "ifnull($expr1, $expr2)";
  93.         }
  94.  
  95.         public function filterQuery($sql): string {
  96.                 return $sql;
  97.         }
  98.  
  99.         public function getSQLBool($bool): string {
  100.                 return $bool ? '1' : '0';
  101.         }
  102.  
  103.         public function escapeString($str): string {
  104.                 return str_replace("'", "''", $str);
  105.         }
  106. }
  107.