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<?php
/**
* This file is part of the Nette Framework (https://nette.org)
* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
*/
namespace Nette\Database;
use Nette;
use Tracy;
/**
* Database helpers.
*/
class Helpers
{
use Nette\StaticClass;
/** @var int maximum SQL length */
public static $maxLength = 100;
/** @var array */
public static $typePatterns = [
'^_' => IStructure::FIELD_TEXT, // PostgreSQL arrays
'(TINY|SMALL|SHORT|MEDIUM|BIG|LONG)(INT)?|INT(EGER|\d+| IDENTITY)?|(SMALL|BIG|)SERIAL\d*|COUNTER|YEAR|BYTE|LONGLONG|UNSIGNED BIG INT' => IStructure::FIELD_INTEGER,
'(NEW)?DEC(IMAL)?(\(.*)?|NUMERIC|REAL|DOUBLE( PRECISION)?|FLOAT\d*|(SMALL)?MONEY|CURRENCY|NUMBER' => IStructure::FIELD_FLOAT,
'BOOL(EAN)?' => IStructure::FIELD_BOOL,
'TIME' => IStructure::FIELD_TIME,
'DATE' => IStructure::FIELD_DATE,
'(SMALL)?DATETIME(OFFSET)?\d*|TIME(STAMP.*)?' => IStructure::FIELD_DATETIME,
'BYTEA|(TINY|MEDIUM|LONG|)BLOB|(LONG )?(VAR)?BINARY|IMAGE' => IStructure::FIELD_BINARY,
];
/**
* Displays complete result set as HTML table for debug purposes.
* @return void
*/
public static function dumpResult(ResultSet $result)
{
echo "\n<table class=\"dump\">\n<caption>" . htmlspecialchars($result->getQueryString(), ENT_IGNORE, 'UTF-8') . "</caption>\n";
if (!$result->getColumnCount()) {
echo "\t<tr>\n\t\t<th>Affected rows:</th>\n\t\t<td>", $result->getRowCount(), "</td>\n\t</tr>\n</table>\n";
return;
}
$i = 0;
foreach ($result as $row) {
if ($i === 0) {
echo "<thead>\n\t<tr>\n\t\t<th>#row</th>\n";
foreach ($row as $col => $foo) {
echo "\t\t<th>" . htmlspecialchars($col, ENT_NOQUOTES, 'UTF-8') . "</th>\n";
}
echo "\t</tr>\n</thead>\n<tbody>\n";
}
echo "\t<tr>\n\t\t<th>", $i, "</th>\n";
foreach ($row as $col) {
echo "\t\t<td>", htmlspecialchars($col, ENT_NOQUOTES, 'UTF-8'), "</td>\n";
}
echo "\t</tr>\n";
$i++;
}
if ($i === 0) {
echo "\t<tr>\n\t\t<td><em>empty result set</em></td>\n\t</tr>\n</table>\n";
} else {
echo "</tbody>\n</table>\n";
}
}
/**
* Returns syntax highlighted SQL command.
* @param string
* @return string
*/
public static function dumpSql($sql, array $params = null, Connection $connection = null)
{
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';
static $keywords2 = 'ALL|DISTINCT|DISTINCTROW|IGNORE|AS|USING|ON|AND|OR|IN|IS|NOT|NULL|[RI]?LIKE|REGEXP|TRUE|FALSE';
// insert new lines
$sql = " $sql ";
$sql = preg_replace("#(?<=[\\s,(])($keywords1)(?=[\\s,)])#i", "\n\$1", $sql);
// reduce spaces
$sql = preg_replace('#[ \t]{2,}#', ' ', $sql);
$sql = wordwrap($sql, 100);
$sql = preg_replace('#([ \t]*\r?\n){2,}#', "\n", $sql);
// syntax highlight
$sql = htmlspecialchars($sql, ENT_IGNORE, 'UTF-8');
$sql = preg_replace_callback("#(/\\*.+?\\*/)|(\\*\\*.+?\\*\\*)|(?<=[\\s,(])($keywords1)(?=[\\s,)])|(?<=[\\s,(=])($keywords2)(?=[\\s,)=])#is", function ($matches) {
if (!empty($matches[1])) { // comment
return '<em style="color:gray">' . $matches[1] . '</em>';
} elseif (!empty($matches[2])) { // error
return '<strong style="color:red">' . $matches[2] . '</strong>';
} elseif (!empty($matches[3])) { // most important keywords
return '<strong style="color:blue">' . $matches[3] . '</strong>';
} elseif (!empty($matches[4])) { // other keywords
return '<strong style="color:green">' . $matches[4] . '</strong>';
}
}, $sql);
// parameters
$sql = preg_replace_callback('#\?#', function () use ($params, $connection) {
static $i = 0;
if (!isset($params[$i])) {
return '?';
}
$param = $params[$i++];
if (is_string($param) && (preg_match('#[^\x09\x0A\x0D\x20-\x7E\xA0-\x{10FFFF}]#u', $param) || preg_last_error())) {
return '<i title="Length ' . strlen($param) . ' bytes"><binary></i>';
} elseif (is_string($param)) {
$length = Nette\Utils\Strings::length($param);
$truncated = Nette\Utils\Strings::truncate($param, self::$maxLength);
$text = htmlspecialchars($connection ? $connection->quote($truncated) : '\'' . $truncated . '\'', ENT_NOQUOTES, 'UTF-8');
return '<span title="Length ' . $length . ' characters">' . $text . '</span>';
} elseif (is_resource($param)) {
$type = get_resource_type($param);
if ($type === 'stream') {
$info = stream_get_meta_data($param);
}
return '<i' . (isset($info['uri']) ? ' title="' . htmlspecialchars($info['uri'], ENT_NOQUOTES, 'UTF-8') . '"' : null)
. '><' . htmlspecialchars($type, ENT_NOQUOTES, 'UTF-8') . ' resource></i> ';
} else {
return htmlspecialchars($param, ENT_NOQUOTES, 'UTF-8');
}
}, $sql);
return '<pre class="dump">' . trim($sql) . "</pre>\n";
}
/**
* Common column type detection.
* @return array
*/
public static function detectTypes(\PDOStatement $statement)
{
$types = [];
$count = $statement->columnCount(); // driver must be meta-aware, see PHP bugs #53782, #54695
for ($col = 0; $col < $count; $col++) {
$meta = $statement->getColumnMeta($col);
if (isset($meta['native_type'])) {
$types[$meta['name']] = self::detectType($meta['native_type']);
}
}
return $types;
}
/**
* Heuristic column type detection.
* @param string
* @return string
* @internal
*/
public static function detectType($type)
{
static $cache;
if (!isset($cache[$type])) {
$cache[$type] = 'string';
foreach (self::$typePatterns as $s => $val) {
if (preg_match("#^($s)$#i", $type)) {
return $cache[$type] = $val;
}
}
}
return $cache[$type];
}
/**
* Import SQL dump from file - extremely fast.
* @return int count of commands
*/
public static function loadFromFile(Connection $connection, $file)
{
@set_time_limit(0); // @ function may be disabled
$handle = @fopen($file, 'r'); // @ is escalated to exception
if (!$handle) {
throw new Nette\FileNotFoundException("Cannot open file '$file'.");
}
$count = 0;
$delimiter = ';';
$sql = '';
$pdo = $connection->getPdo(); // native query without logging
while (!feof($handle)) {
$s = rtrim(fgets($handle));
if (!strncasecmp($s, 'DELIMITER ', 10)) {
$delimiter = substr($s, 10);
} elseif (substr($s, -strlen($delimiter)) === $delimiter) {
$sql .= substr($s, 0, -strlen($delimiter));
$pdo->exec($sql);
$sql = '';
$count++;
} else {
$sql .= $s . "\n";
}
}
if (trim($sql) !== '') {
$pdo->exec($sql);
$count++;
}
fclose($handle);
return $count;
}
public static function createDebugPanel($connection, $explain = true, $name = null)
{
$panel = new Nette\Bridges\DatabaseTracy\ConnectionPanel($connection);
$panel->explain = $explain;
$panel->name = $name;
Tracy\Debugger::getBar()->addPanel($panel);
return $panel;
}
/**
* Reformat source to key -> value pairs.
* @return array
*/
public static function toPairs(array $rows, $key = null, $value = null)
{
if (!$rows) {
return [];
}
$keys = array_keys((array) reset($rows));
if (!count($keys)) {
throw new \LogicException('Result set does not contain any column.');
} elseif ($key === null && $value === null) {
if (count($keys) === 1) {
list($value) = $keys;
} else {
list($key, $value) = $keys;
}
}
$return = [];
if ($key === null) {
foreach ($rows as $row) {
$return[] = ($value === null ? $row : $row[$value]);
}
} else {
foreach ($rows as $row) {
$return[(string) $row[$key]] = ($value === null ? $row : $row[$value]);
}
}
return $return;
}
/**
* Finds duplicate columns in select statement
* @param \PDOStatement
* @return string
*/
public static function findDuplicates(\PDOStatement $statement)
{
$cols = [];
for ($i = 0; $i < $statement->columnCount(); $i++) {
$meta = $statement->getColumnMeta($i);
$cols[$meta['name']][] = isset($meta['table']) ? $meta['table'] : '';
}
$duplicates = [];
foreach ($cols as $name => $tables) {
if (count($tables) > 1) {
$tables = array_filter(array_unique($tables));
$duplicates[] = "'$name'" . ($tables ? ' (from ' . implode(', ', $tables) . ')' : '');
}
}
return implode(', ', $duplicates);
}
}
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