1: <?php
  2: 
  3: /**
  4:  * This file is part of the Nette Framework (http://nette.org)
  5:  * Copyright (c) 2004 David Grudl (http://davidgrudl.com)
  6:  */
  7: 
  8: namespace Nette\Database;
  9: 
 10: use Nette;
 11: 
 12: 
 13: /**
 14:  * Database helpers.
 15:  *
 16:  * @author     David Grudl
 17:  */
 18: class Helpers
 19: {
 20:     /** @var int maximum SQL length */
 21:     static public $maxLength = 100;
 22: 
 23:     /** @var array */
 24:     public static $typePatterns = array(
 25:         '^_' => IReflection::FIELD_TEXT, // PostgreSQL arrays
 26:         'BYTEA|BLOB|BIN' => IReflection::FIELD_BINARY,
 27:         'TEXT|CHAR|POINT|INTERVAL' => IReflection::FIELD_TEXT,
 28:         'YEAR|BYTE|COUNTER|SERIAL|INT|LONG|SHORT|^TINY$' => IReflection::FIELD_INTEGER,
 29:         'CURRENCY|REAL|MONEY|FLOAT|DOUBLE|DECIMAL|NUMERIC|NUMBER' => IReflection::FIELD_FLOAT,
 30:         '^TIME$' => IReflection::FIELD_TIME,
 31:         'TIME' => IReflection::FIELD_DATETIME, // DATETIME, TIMESTAMP
 32:         'DATE' => IReflection::FIELD_DATE,
 33:         'BOOL' => IReflection::FIELD_BOOL,
 34:     );
 35: 
 36: 
 37:     /**
 38:      * Displays complete result set as HTML table for debug purposes.
 39:      * @return void
 40:      */
 41:     public static function dumpResult(ResultSet $result)
 42:     {
 43:         echo "\n<table class=\"dump\">\n<caption>" . htmlSpecialChars($result->getQueryString()) . "</caption>\n";
 44:         if (!$result->getColumnCount()) {
 45:             echo "\t<tr>\n\t\t<th>Affected rows:</th>\n\t\t<td>", $result->getRowCount(), "</td>\n\t</tr>\n</table>\n";
 46:             return;
 47:         }
 48:         $i = 0;
 49:         foreach ($result as $row) {
 50:             if ($i === 0) {
 51:                 echo "<thead>\n\t<tr>\n\t\t<th>#row</th>\n";
 52:                 foreach ($row as $col => $foo) {
 53:                     echo "\t\t<th>" . htmlSpecialChars($col) . "</th>\n";
 54:                 }
 55:                 echo "\t</tr>\n</thead>\n<tbody>\n";
 56:             }
 57:             echo "\t<tr>\n\t\t<th>", $i, "</th>\n";
 58:             foreach ($row as $col) {
 59:                 //if (is_object($col)) $col = $col->__toString();
 60:                 echo "\t\t<td>", htmlSpecialChars($col), "</td>\n";
 61:             }
 62:             echo "\t</tr>\n";
 63:             $i++;
 64:         }
 65: 
 66:         if ($i === 0) {
 67:             echo "\t<tr>\n\t\t<td><em>empty result set</em></td>\n\t</tr>\n</table>\n";
 68:         } else {
 69:             echo "</tbody>\n</table>\n";
 70:         }
 71:     }
 72: 
 73: 
 74:     /**
 75:      * Returns syntax highlighted SQL command.
 76:      * @param  string
 77:      * @return string
 78:      */
 79:     public static function dumpSql($sql, array $params = NULL)
 80:     {
 81:         static $keywords1 = 'SELECT|(?:ON\s+DUPLICATE\s+KEY)?UPDATE|INSERT(?:\s+INTO)?|REPLACE(?:\s+INTO)?|DELETE|CALL|UNION|FROM|WHERE|HAVING|GROUP\s+BY|ORDER\s+BY|LIMIT|OFFSET|SET|VALUES|LEFT\s+JOIN|INNER\s+JOIN|TRUNCATE';
 82:         static $keywords2 = 'ALL|DISTINCT|DISTINCTROW|IGNORE|AS|USING|ON|AND|OR|IN|IS|NOT|NULL|[RI]?LIKE|REGEXP|TRUE|FALSE';
 83: 
 84:         // insert new lines
 85:         $sql = " $sql ";
 86:         $sql = preg_replace("#(?<=[\\s,(])($keywords1)(?=[\\s,)])#i", "\n\$1", $sql);
 87: 
 88:         // reduce spaces
 89:         $sql = preg_replace('#[ \t]{2,}#', " ", $sql);
 90: 
 91:         $sql = wordwrap($sql, 100);
 92:         $sql = preg_replace('#([ \t]*\r?\n){2,}#', "\n", $sql);
 93: 
 94:         // syntax highlight
 95:         $sql = htmlSpecialChars($sql);
 96:         $sql = preg_replace_callback("#(/\\*.+?\\*/)|(\\*\\*.+?\\*\\*)|(?<=[\\s,(])($keywords1)(?=[\\s,)])|(?<=[\\s,(=])($keywords2)(?=[\\s,)=])#is", function($matches) {
 97:             if (!empty($matches[1])) { // comment
 98:                 return '<em style="color:gray">' . $matches[1] . '</em>';
 99: 
100:             } elseif (!empty($matches[2])) { // error
101:                 return '<strong style="color:red">' . $matches[2] . '</strong>';
102: 
103:             } elseif (!empty($matches[3])) { // most important keywords
104:                 return '<strong style="color:blue">' . $matches[3] . '</strong>';
105: 
106:             } elseif (!empty($matches[4])) { // other keywords
107:                 return '<strong style="color:green">' . $matches[4] . '</strong>';
108:             }
109:         }, $sql);
110: 
111:         // parameters
112:         $sql = preg_replace_callback('#\?#', function() use ($params) {
113:             static $i = 0;
114:             if (!isset($params[$i])) {
115:                 return '?';
116:             }
117:             $param = $params[$i++];
118:             if (is_string($param) && (preg_match('#[^\x09\x0A\x0D\x20-\x7E\xA0-\x{10FFFF}]#u', $param) || preg_last_error())) {
119:                 return '<i title="Length ' . strlen($param) . ' bytes">&lt;binary&gt;</i>';
120: 
121:             } elseif (is_string($param)) {
122:                 return '<span title="Length ' . Nette\Utils\Strings::length($param) . ' characters">\'' . htmlspecialchars(Nette\Utils\Strings::truncate($param, Helpers::$maxLength)) . "'</span>";
123: 
124:             } elseif (is_resource($param)) {
125:                 $type = get_resource_type($param);
126:                 if ($type === 'stream') {
127:                     $info = stream_get_meta_data($param);
128:                 }
129:                 return '<i' . (isset($info['uri']) ? ' title="' . htmlspecialchars($info['uri']) . '"' : NULL) . '>&lt;' . htmlSpecialChars($type) . " resource&gt;</i> ";
130: 
131:             } else {
132:                 return htmlspecialchars($param);
133:             }
134:         }, $sql);
135: 
136:         return '<pre class="dump">' . trim($sql) . "</pre>\n";
137:     }
138: 
139: 
140:     /**
141:      * Common column type detection.
142:      * @return array
143:      */
144:     public static function detectTypes(\PDOStatement $statement)
145:     {
146:         $types = array();
147:         $count = $statement->columnCount(); // driver must be meta-aware, see PHP bugs #53782, #54695
148:         for ($col = 0; $col < $count; $col++) {
149:             $meta = $statement->getColumnMeta($col);
150:             if (isset($meta['native_type'])) {
151:                 $types[$meta['name']] = self::detectType($meta['native_type']);
152:             }
153:         }
154:         return $types;
155:     }
156: 
157: 
158:     /**
159:      * Heuristic column type detection.
160:      * @param  string
161:      * @return string
162:      * @internal
163:      */
164:     public static function detectType($type)
165:     {
166:         static $cache;
167:         if (!isset($cache[$type])) {
168:             $cache[$type] = 'string';
169:             foreach (self::$typePatterns as $s => $val) {
170:                 if (preg_match("#$s#i", $type)) {
171:                     return $cache[$type] = $val;
172:                 }
173:             }
174:         }
175:         return $cache[$type];
176:     }
177: 
178: 
179:     /**
180:      * Import SQL dump from file - extreme fast.
181:      * @return int  count of commands
182:      */
183:     public static function loadFromFile(Connection $connection, $file)
184:     {
185:         @set_time_limit(0); // intentionally @
186: 
187:         $handle = @fopen($file, 'r'); // intentionally @
188:         if (!$handle) {
189:             throw new Nette\FileNotFoundException("Cannot open file '$file'.");
190:         }
191: 
192:         $count = 0;
193:         $sql = '';
194:         while (!feof($handle)) {
195:             $s = fgets($handle);
196:             $sql .= $s;
197:             if (substr(rtrim($s), -1) === ';') {
198:                 $connection->query($sql); // native query without logging
199:                 $sql = '';
200:                 $count++;
201:             }
202:         }
203:         if (trim($sql) !== '') {
204:             $connection->query($sql);
205:             $count++;
206:         }
207:         fclose($handle);
208:         return $count;
209:     }
210: 
211: 
212:     public static function createDebugPanel($connection, $explain = TRUE, $name = NULL)
213:     {
214:         $panel = new Nette\Database\Diagnostics\ConnectionPanel($connection);
215:         $panel->explain = $explain;
216:         $panel->name = $name;
217:         Nette\Diagnostics\Debugger::getBar()->addPanel($panel);
218:         return $panel;
219:     }
220: 
221: 
222:     /**
223:      * Reformat source to key -> value pairs.
224:      * @return array
225:      */
226:     public static function toPairs(array $rows, $key = NULL, $value = NULL)
227:     {
228:         if (!$rows) {
229:             return array();
230:         }
231: 
232:         $keys = array_keys((array) reset($rows));
233:         if (!count($keys)) {
234:             throw new \LogicException('Result set does not contain any column.');
235: 
236:         } elseif ($key === NULL && $value === NULL) {
237:             if (count($keys) === 1) {
238:                 list($value) = $keys;
239:             } else {
240:                 list($key, $value) = $keys;
241:             }
242:         }
243: 
244:         $return = array();
245:         if ($key === NULL) {
246:             foreach ($rows as $row) {
247:                 $return[] = ($value === NULL ? $row : $row[$value]);
248:             }
249:         } else {
250:             foreach ($rows as $row) {
251:                 $return[is_object($row[$key]) ? (string) $row[$key] : $row[$key]] = ($value === NULL ? $row : $row[$value]);
252:             }
253:         }
254: 
255:         return $return;
256:     }
257: 
258: }
259: