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150 | daniel-mar | 1 | <?php |
2 | |||
3 | /* |
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4 | * OIDplus 2.0 |
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5 | * Copyright 2019 Daniel Marschall, ViaThinkSoft |
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6 | * |
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7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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8 | * you may not use this file except in compliance with the License. |
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9 | * You may obtain a copy of the License at |
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10 | * |
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11 | * http://www.apache.org/licenses/LICENSE-2.0 |
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12 | * |
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13 | * Unless required by applicable law or agreed to in writing, software |
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14 | * distributed under the License is distributed on an "AS IS" BASIS, |
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15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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16 | * See the License for the specific language governing permissions and |
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17 | * limitations under the License. |
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18 | */ |
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19 | |||
20 | if (!defined('IN_OIDPLUS')) die(); |
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21 | |||
246 | daniel-mar | 22 | class OIDplusDatabasePluginPDO extends OIDplusDatabasePlugin { |
261 | daniel-mar | 23 | private $conn = null; |
260 | daniel-mar | 24 | private $last_error = null; // we need that because PDO divides prepared statement errors and normal query errors, but we have only one "error()" method |
150 | daniel-mar | 25 | |
236 | daniel-mar | 26 | public static function getPluginInformation(): array { |
222 | daniel-mar | 27 | $out = array(); |
28 | $out['name'] = 'PDO'; |
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29 | $out['author'] = 'ViaThinkSoft'; |
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30 | $out['version'] = null; |
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31 | $out['descriptionHTML'] = null; |
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32 | return $out; |
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33 | } |
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34 | |||
236 | daniel-mar | 35 | public static function name(): string { |
150 | daniel-mar | 36 | return "PDO"; |
37 | } |
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38 | |||
261 | daniel-mar | 39 | public function doQuery(string $sql, /*?array*/ $prepared_args=null): OIDplusQueryResult { |
239 | daniel-mar | 40 | $this->last_error = null; |
150 | daniel-mar | 41 | if (is_null($prepared_args)) { |
257 | daniel-mar | 42 | $res = $this->conn->query($sql); |
236 | daniel-mar | 43 | |
44 | if ($res === false) { |
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257 | daniel-mar | 45 | $this->last_error = $this->conn->errorInfo()[2]; |
236 | daniel-mar | 46 | throw new OIDplusSQLException($sql, $this->error()); |
47 | } else { |
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48 | return new OIDplusQueryResultPDO($res); |
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49 | } |
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150 | daniel-mar | 50 | } else { |
51 | // TEST: Emulate the prepared statement |
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236 | daniel-mar | 52 | /* |
150 | daniel-mar | 53 | foreach ($prepared_args as $arg) { |
54 | $needle = '?'; |
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55 | $replace = "'$arg'"; // TODO: types |
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56 | $pos = strpos($sql, $needle); |
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57 | if ($pos !== false) { |
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58 | $sql = substr_replace($sql, $replace, $pos, strlen($needle)); |
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59 | } |
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60 | } |
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257 | daniel-mar | 61 | return OIDplusQueryResultPDO($this->conn->query($sql)); |
236 | daniel-mar | 62 | */ |
150 | daniel-mar | 63 | |
64 | if (!is_array($prepared_args)) { |
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250 | daniel-mar | 65 | throw new OIDplusException("'prepared_args' must be either NULL or an ARRAY."); |
150 | daniel-mar | 66 | } |
260 | daniel-mar | 67 | |
239 | daniel-mar | 68 | foreach ($prepared_args as &$value) { |
260 | daniel-mar | 69 | // We need to manually convert booleans into strings, because there is a |
239 | daniel-mar | 70 | // 14 year old bug that hasn't been adressed by the PDO developers: |
260 | daniel-mar | 71 | // https://bugs.php.net/bug.php?id=57157 |
239 | daniel-mar | 72 | // Note: We are using '1' and '0' instead of 'true' and 'false' because MySQL converts boolean to tinyint(1) |
73 | if (is_bool($value)) $value = $value ? '1' : '0'; |
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260 | daniel-mar | 74 | } |
75 | |||
257 | daniel-mar | 76 | $ps = $this->conn->prepare($sql); |
239 | daniel-mar | 77 | if (!$ps) { |
78 | throw new OIDplusSQLException($sql, 'Cannot prepare statement'); |
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150 | daniel-mar | 79 | } |
239 | daniel-mar | 80 | $this->prepare_cache[$sql] = $ps; |
81 | |||
150 | daniel-mar | 82 | if (!$ps->execute($prepared_args)) { |
239 | daniel-mar | 83 | $this->last_error = $ps->errorInfo()[2]; |
236 | daniel-mar | 84 | throw new OIDplusSQLException($sql, $this->error()); |
150 | daniel-mar | 85 | } |
236 | daniel-mar | 86 | return new OIDplusQueryResultPDO($ps); |
150 | daniel-mar | 87 | } |
88 | } |
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236 | daniel-mar | 89 | |
90 | public function insert_id(): int { |
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257 | daniel-mar | 91 | return $this->conn->lastInsertId(); |
150 | daniel-mar | 92 | } |
236 | daniel-mar | 93 | |
94 | public function error(): string { |
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239 | daniel-mar | 95 | $err = $this->last_error; |
96 | if ($err == null) $err = ''; |
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97 | return $err; |
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150 | daniel-mar | 98 | } |
236 | daniel-mar | 99 | |
245 | daniel-mar | 100 | protected function doConnect(): void { |
260 | daniel-mar | 101 | if (!class_exists('PDO')) throw new OIDplusConfigInitializationException('PHP extension "PDO" not installed'); |
102 | |||
150 | daniel-mar | 103 | try { |
104 | $options = [ |
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105 | # PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, |
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106 | PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC, |
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107 | PDO::ATTR_EMULATE_PREPARES => true, |
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108 | ]; |
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109 | |||
110 | // Try connecting to the database |
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261 | daniel-mar | 111 | $dsn = OIDplus::baseConfig()->getValue('PDO_DSN', 'mysql:host=localhost;dbname=oidplus;CHARSET=UTF8'); |
112 | $username = OIDplus::baseConfig()->getValue('PDO_USERNAME', 'root'); |
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113 | $password = OIDplus::baseConfig()->getValue('PDO_PASSWORD', ''); |
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114 | $this->conn = new PDO($dsn, $username, $password, $options); |
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150 | daniel-mar | 115 | } catch (PDOException $e) { |
245 | daniel-mar | 116 | $message = $e->getMessage(); |
117 | throw new OIDplusConfigInitializationException('Connection to the database failed! '.$message); |
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150 | daniel-mar | 118 | } |
119 | |||
120 | $this->query("SET NAMES 'utf8'"); |
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121 | } |
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122 | |||
245 | daniel-mar | 123 | protected function doDisconnect(): void { |
257 | daniel-mar | 124 | $this->conn = null; // the connection will be closed by removing the reference |
245 | daniel-mar | 125 | } |
126 | |||
150 | daniel-mar | 127 | private $intransaction = false; |
128 | |||
236 | daniel-mar | 129 | public function transaction_begin(): void { |
250 | daniel-mar | 130 | if ($this->intransaction) throw new OIDplusException("Nested transactions are not supported by this database plugin."); |
257 | daniel-mar | 131 | $this->conn->beginTransaction(); |
150 | daniel-mar | 132 | $this->intransaction = true; |
133 | } |
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134 | |||
236 | daniel-mar | 135 | public function transaction_commit(): void { |
257 | daniel-mar | 136 | $this->conn->commit(); |
150 | daniel-mar | 137 | $this->intransaction = false; |
138 | } |
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139 | |||
236 | daniel-mar | 140 | public function transaction_rollback(): void { |
257 | daniel-mar | 141 | $this->conn->rollBack(); |
150 | daniel-mar | 142 | $this->intransaction = false; |
143 | } |
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144 | } |
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236 | daniel-mar | 145 | |
146 | class OIDplusQueryResultPDO extends OIDplusQueryResult { |
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147 | protected $no_resultset; |
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148 | protected $res; |
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149 | |||
150 | public function __construct($res) { |
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239 | daniel-mar | 151 | $this->no_resultset = is_bool($res); |
260 | daniel-mar | 152 | |
239 | daniel-mar | 153 | if (!$this->no_resultset) { |
154 | $this->res = $res; |
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155 | } |
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236 | daniel-mar | 156 | } |
260 | daniel-mar | 157 | |
239 | daniel-mar | 158 | public function __destruct() { |
159 | if ($this->res) $this->res->closeCursor(); |
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160 | } |
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260 | daniel-mar | 161 | |
236 | daniel-mar | 162 | public function containsResultSet(): bool { |
163 | return !$this->no_resultset; |
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164 | } |
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165 | |||
166 | public function num_rows(): int { |
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250 | daniel-mar | 167 | if ($this->no_resultset) throw new OIDplusException("The query has returned no result set (i.e. it was not a SELECT query)"); |
236 | daniel-mar | 168 | return $this->res->rowCount(); |
169 | } |
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170 | |||
171 | public function fetch_array()/*: ?array*/ { |
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250 | daniel-mar | 172 | if ($this->no_resultset) throw new OIDplusException("The query has returned no result set (i.e. it was not a SELECT query)"); |
236 | daniel-mar | 173 | $ret = $this->res->fetch(PDO::FETCH_ASSOC); |
174 | if ($ret === false) $ret = null; |
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175 | return $ret; |
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176 | } |
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177 | |||
178 | public function fetch_object()/*: ?object*/ { |
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250 | daniel-mar | 179 | if ($this->no_resultset) throw new OIDplusException("The query has returned no result set (i.e. it was not a SELECT query)"); |
236 | daniel-mar | 180 | $ret = $this->res->fetch(PDO::FETCH_OBJ); |
181 | if ($ret === false) $ret = null; |
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182 | return $ret; |
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183 | } |
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184 | } |