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  1. <?php
  2.  
  3. /*
  4.  * OIDplus 2.0
  5.  * Copyright 2019 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. class OIDplusSqlSlangPluginMySQL extends OIDplusSqlSlangPlugin {
  21.  
  22.         public static function id(): string {
  23.                 return 'mysql';
  24.         }
  25.  
  26.         public function natOrder($fieldname, $order='asc'): string {
  27.  
  28.                 $order = strtolower($order);
  29.                 if (($order != 'asc') && ($order != 'desc')) {
  30.                         throw new OIDplusException(_L('Invalid order "%1" (needs to be "asc" or "desc")',$order));
  31.                 }
  32.  
  33.                 $out = array();
  34.  
  35.                 $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
  36.  
  37.                 // 1. sort by namespace (oid, guid, ...)
  38.                 $out[] = "SUBSTRING_INDEX($fieldname,':',1) $order";
  39.  
  40.                 // 2. sort by first arc (0,1,2)
  41.                 $out[] = "SUBSTRING(SUBSTRING_INDEX($fieldname,'.',1), LENGTH(SUBSTRING_INDEX($fieldname,':',1))+2, $max_arc_len) $order";
  42.  
  43.                 for ($i=2; $i<=OIDplus::baseConfig()->getValue('LIMITS_MAX_OID_DEPTH'); $i++) {
  44.                         // 3. Sort by the rest arcs one by one, not that MySQL can only handle decimal(65), not decimal($max_arc_len)
  45.                         $out[] = "cast(SUBSTRING(SUBSTRING_INDEX($fieldname,'.',$i), LENGTH(SUBSTRING_INDEX($fieldname,'.',".($i-1)."))+2, $max_arc_len) as decimal($max_arc_len)) $order";
  46.                 }
  47.  
  48.                 // 4. as last resort, sort by the identifier itself, e.g. if the casts above did fail (happens if it is not an OID)
  49.                 $out[] = "$fieldname $order";
  50.  
  51.                 return implode(', ', $out);
  52.  
  53.         }
  54.  
  55.         public function sqlDate(): string {
  56.                 return 'now()';
  57.         }
  58.  
  59.         public function detect(OIDplusDatabaseConnection $db): bool {
  60.                 try {
  61.                         $vers = $db->query("select version() as dbms_version")->fetch_object()->dbms_version;
  62.                         $vers = strtolower($vers);
  63.                         return (strpos($vers, 'mysql') !== false) || (strpos($vers, 'mariadb') !== false);
  64.                 } catch (Exception $e) {
  65.                         return false;
  66.                 }
  67.         }
  68.  
  69.         public function insert_id(OIDplusDatabaseConnection $db): int {
  70.                 $res = $db->query("SELECT LAST_INSERT_ID() AS ID");
  71.                 $row = $res->fetch_array();
  72.                 return (int)$row['ID'];
  73.         }
  74.  
  75.  
  76.         public function setupSetTablePrefix($cont, $table, $prefix): string {
  77.                 $cont = str_replace('`'.$table.'`', '`'.$prefix.$table.'`', $cont);
  78.                 return $cont;
  79.         }
  80.  
  81.         public function setupCreateDbIfNotExists($database): string {
  82.                 return "CREATE DATABASE IF NOT EXISTS `$database`;\n\n";
  83.         }
  84.  
  85.         public function setupUseDatabase($database): string {
  86.                 return "USE `$database`;\n\n";
  87.         }
  88. }