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  1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (http://nette.org)
  5:  *
  6:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  7:  *
  8:  * For the full copyright and license information, please view
  9:  * the file license.txt that was distributed with this source code.
 10:  * @package Nette\Database
 11:  */
 12: 
 13: 
 14: 
 15: /**
 16:  * SQL preprocessor.
 17:  *
 18:  * @author     David Grudl
 19:  * @package Nette\Database
 20:  */
 21: class SqlPreprocessor extends Object
 22: {
 23:     /** @var Connection */
 24:     private $connection;
 25: 
 26:     /** @var ISupplementalDriver */
 27:     private $driver;
 28: 
 29:     /** @var array of input parameters */
 30:     private $params;
 31: 
 32:     /** @var array of parameters to be processed by PDO */
 33:     private $remaining;
 34: 
 35:     /** @var int */
 36:     private $counter;
 37: 
 38:     /** @var string values|assoc|multi */
 39:     private $arrayMode;
 40: 
 41: 
 42:     public function __construct(Connection $connection)
 43:     {
 44:         $this->connection = $connection;
 45:         $this->driver = $connection->getSupplementalDriver();
 46:     }
 47: 
 48: 
 49:     /**
 50:      * @param  string
 51:      * @param  array
 52:      * @return array of [sql, params]
 53:      */
 54:     public function process($sql, $params)
 55:     {
 56:         $this->params = $params;
 57:         $this->counter = 0;
 58:         $this->remaining = array();
 59:         $this->arrayMode = 'assoc';
 60: 
 61:         $sql = Strings::replace($sql, '~\'.*?\'|".*?"|\?|\b(?:INSERT|REPLACE|UPDATE)\b~si', array($this, 'callback'));
 62: 
 63:         while ($this->counter < count($params)) {
 64:             $sql .= ' ' . $this->formatValue($params[$this->counter++]);
 65:         }
 66: 
 67:         return array($sql, $this->remaining);
 68:     }
 69: 
 70: 
 71:     /** @internal */
 72:     public function callback($m)
 73:     {
 74:         $m = $m[0];
 75:         if ($m[0] === "'" || $m[0] === '"') { // string
 76:             return $m;
 77: 
 78:         } elseif ($m === '?') { // placeholder
 79:             if ($this->counter >= count($this->params)) {
 80:                 throw new InvalidArgumentException('There are more placeholders than passed parameters.');
 81:             }
 82:             return $this->formatValue($this->params[$this->counter++]);
 83: 
 84:         } else { // INSERT, REPLACE, UPDATE
 85:             $this->arrayMode = strtoupper($m) === 'UPDATE' ? 'assoc' : 'values';
 86:             return $m;
 87:         }
 88:     }
 89: 
 90: 
 91:     private function formatValue($value)
 92:     {
 93:         if (is_string($value)) {
 94:             if (strlen($value) > 20) {
 95:                 $this->remaining[] = $value;
 96:                 return '?';
 97: 
 98:             } else {
 99:                 return $this->connection->quote($value);
100:             }
101: 
102:         } elseif (is_int($value)) {
103:             return (string) $value;
104: 
105:         } elseif (is_float($value)) {
106:             return rtrim(rtrim(number_format($value, 10, '.', ''), '0'), '.');
107: 
108:         } elseif (is_bool($value)) {
109:             return $this->driver->formatBool($value);
110: 
111:         } elseif ($value === NULL) {
112:             return 'NULL';
113: 
114:         } elseif ($value instanceof TableRow) {
115:             return $value->getPrimary();
116: 
117:         } elseif (is_array($value) || $value instanceof Traversable) {
118:             $vx = $kx = array();
119: 
120:             if ($value instanceof Traversable) {
121:                 $value = iterator_to_array($value);
122:             }
123: 
124:             if (isset($value[0])) { // non-associative; value, value, value
125:                 foreach ($value as $v) {
126:                     $vx[] = $this->formatValue($v);
127:                 }
128:                 return implode(', ', $vx);
129: 
130:             } elseif ($this->arrayMode === 'values') { // (key, key, ...) VALUES (value, value, ...)
131:                 $this->arrayMode = 'multi';
132:                 foreach ($value as $k => $v) {
133:                     $kx[] = $this->driver->delimite($k);
134:                     $vx[] = $this->formatValue($v);
135:                 }
136:                 return '(' . implode(', ', $kx) . ') VALUES (' . implode(', ', $vx) . ')';
137: 
138:             } elseif ($this->arrayMode === 'assoc') { // key=value, key=value, ...
139:                 foreach ($value as $k => $v) {
140:                     $vx[] = $this->driver->delimite($k) . '=' . $this->formatValue($v);
141:                 }
142:                 return implode(', ', $vx);
143: 
144:             } elseif ($this->arrayMode === 'multi') { // multiple insert (value, value, ...), ...
145:                 foreach ($value as $k => $v) {
146:                     $vx[] = $this->formatValue($v);
147:                 }
148:                 return '(' . implode(', ', $vx) . ')';
149:             }
150: 
151:         } elseif ($value instanceof DateTime) {
152:             return $this->driver->formatDateTime($value);
153: 
154:         } elseif ($value instanceof SqlLiteral) {
155:             return $value->__toString();
156: 
157:         } else {
158:             $this->remaining[] = $value;
159:             return '?';
160:         }
161:     }
162: 
163: }
164: 
Nette Framework 2.0.12 (for PHP 5.2, un-prefixed) API API documentation generated by ApiGen 2.8.0