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  1. <?php
  2.  
  3. /*
  4.  * OIDplus 2.0
  5.  * Copyright 2019 - 2023 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. // phpcs:disable PSR1.Files.SideEffects
  23. \defined('INSIDE_OIDPLUS') or die;
  24. // phpcs:enable PSR1.Files.SideEffects
  25.  
  26. class OIDplusQueryResultODBC extends OIDplusQueryResult {
  27.         protected $no_resultset;
  28.         protected $res;
  29.  
  30.         /**
  31.          * @param $res
  32.          */
  33.         public function __construct($res) {
  34.                 $this->no_resultset = is_bool($res);
  35.  
  36.                 if (!$this->no_resultset) {
  37.                         $this->res = $res;
  38.                 }
  39.         }
  40.  
  41.         /**
  42.          *
  43.          */
  44.         public function __destruct() {
  45.                 // odbc_close_cursor($this->res);
  46.         }
  47.  
  48.         /**
  49.          * @return bool
  50.          */
  51.         public function containsResultSet(): bool {
  52.                 return !$this->no_resultset;
  53.         }
  54.  
  55.         /**
  56.          * @return int
  57.          */
  58.         private function num_rows_workaround(): int {
  59.                 $dummy = 0;
  60.  
  61.                 // go to the end of the result set
  62.                 $till_eof = 0;
  63.                 while ($temp = odbc_fetch_into($this->res, $dummy)) $till_eof++;
  64.  
  65.                 // reset cursor
  66.                 @odbc_fetch_row($this->res, 0);
  67.  
  68.                 // count the rows in the result set
  69.                 $ret = 0;
  70.                 while ($temp = odbc_fetch_into($this->res, $dummy)) $ret++;
  71.  
  72.                 // this would indicate that the odbc_fetch_row() could not reset the cursor
  73.                 if ($ret < $till_eof) return -1;
  74.  
  75.                 // go back to the row were started with
  76.                 @odbc_fetch_row($this->res, $ret-$till_eof);
  77.  
  78.                 return $ret;
  79.         }
  80.  
  81.         /**
  82.          * @return int
  83.          * @throws OIDplusException
  84.          */
  85.         public function num_rows(): int {
  86.                 if ($this->no_resultset) throw new OIDplusException(_L('The query has returned no result set (i.e. it was not a SELECT query)'));
  87.                 $ret = odbc_num_rows($this->res);
  88.  
  89.                 // Workaround for drivers that do not support odbc_num_rows (e.g. Microsoft Access)
  90.                 if ($ret === -1) $ret = $this->num_rows_workaround();
  91.  
  92.                 if ($ret === -1) throw new OIDplusException(_L('The database driver has problems with "%1"','num_rows'));
  93.  
  94.                 return $ret;
  95.         }
  96.  
  97.         /**
  98.          * @return array|null
  99.          * @throws OIDplusException
  100.          */
  101.         public function fetch_array()/*: ?array*/ {
  102.                 if ($this->no_resultset) throw new OIDplusException(_L('The query has returned no result set (i.e. it was not a SELECT query)'));
  103.                 $ret = odbc_fetch_array($this->res);
  104.                 if ($ret === false) $ret = null;
  105.                 if (!is_null($ret)) {
  106.                         // ODBC gives bit(1) as binary, MySQL as integer and PDO as string.
  107.                         // We'll do it like MySQL does, even if ODBC is actually more correct.
  108.                         foreach ($ret as &$value) {
  109.                                 if ($value === chr(0)) $value = 0;
  110.                                 if ($value === chr(1)) $value = 1;
  111.                         }
  112.                 }
  113.  
  114.                 // Oracle returns $ret['VALUE'] because unquoted column-names are always upper-case
  115.                 // We can't quote every single column throughout the whole program, so we use this workaround...
  116.                 if ($ret) {
  117.                         $keys = array_keys($ret);
  118.                         foreach($keys as $key) {
  119.                                 $ret[strtolower($key)]=$ret[$key];
  120.                                 $ret[strtoupper($key)]=$ret[$key];
  121.                         }
  122.                 }
  123.  
  124.                 return $ret;
  125.         }
  126.  
  127.         /**
  128.          * @return false|object|null
  129.          * @throws OIDplusException
  130.          */
  131.         public function fetch_object()/*: ?object*/ {
  132.                 if ($this->no_resultset) throw new OIDplusException(_L('The query has returned no result set (i.e. it was not a SELECT query)'));
  133.                 $ret = odbc_fetch_object($this->res);
  134.                 if ($ret === false) $ret = null;
  135.                 if (!is_null($ret)) {
  136.                         // ODBC gives bit(1) as binary, MySQL as integer and PDO as string.
  137.                         // We'll do it like MySQL does, even if ODBC is actually more correct.
  138.                         foreach ((array)$ret as &$value) {
  139.                                 if ($value === chr(0)) $value = 0;
  140.                                 if ($value === chr(1)) $value = 1;
  141.                         }
  142.                 }
  143.  
  144.                 // Oracle returns $ret['VALUE'] because unquoted column-names are always upper-case
  145.                 // We can't quote every single column throughout the whole program, so we use this workaround...
  146.                 if ($ret) {
  147.                         foreach ((array)$ret as $name => $val) {
  148.                                 $ret->{strtoupper($name)} = $val;
  149.                                 $ret->{strtolower($name)} = $val;
  150.                         }
  151.                 }
  152.  
  153.                 return $ret;
  154.         }
  155. }
  156.