140 lines
3.7 KiB
PHP
140 lines
3.7 KiB
PHP
<?php
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/**
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* This file is part of the PropelBundle package.
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*
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* @license MIT License
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*/
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namespace Propel\Bundle\PropelBundle\Twig\Extension;
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/**
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* SyntaxExtension class
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*
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* @package PropelBundle
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* @subpackage Extension
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* @author William DURAND <william.durand1@gmail.com>
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*/
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class SyntaxExtension extends \Twig_Extension
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{
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public function getFilters()
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{
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return [
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new \Twig_SimpleFilter('format_sql', [$this, 'formatSQL'], ['is_safe' => ['html']]),
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new \Twig_SimpleFilter('format_memory', [$this, 'formatMemory']),
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];
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}
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public function getName()
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{
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return 'propel_syntax_extension';
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}
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/**
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* Format a byte count into a human-readable representation.
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*
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* @param integer $bytes Byte count to convert. Can be negative.
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* @param integer $precision How many decimals to include.
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*
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* @return string
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*/
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public function formatMemory($bytes, $precision = 3)
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{
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$absBytes = abs($bytes);
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$sign = ($bytes == $absBytes) ? 1 : -1;
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$suffix = array('B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB');
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$total = count($suffix);
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for ($i = 0; $absBytes > 1024 && $i < $total; $i++) {
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$absBytes /= 1024;
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}
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return self::toPrecision($sign * $absBytes, $precision).' '.$suffix[$i];
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}
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public function formatSQL($sql)
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{
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// list of keywords to prepend a newline in output
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$newlines = array(
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'FROM',
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'(((FULL|LEFT|RIGHT)? ?(OUTER|INNER)?|CROSS|NATURAL)? JOIN)',
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'VALUES',
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'WHERE',
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'ORDER BY',
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'GROUP BY',
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'HAVING',
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'LIMIT',
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);
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// list of keywords to highlight
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$keywords = array_merge($newlines, array(
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// base
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'SELECT', 'UPDATE', 'DELETE', 'INSERT', 'REPLACE',
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'SET',
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'INTO',
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'AS',
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'DISTINCT',
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// most used methods
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'COUNT',
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'AVG',
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'MIN',
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'MAX',
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// joins
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'ON', 'USING',
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// where clause
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'(IS (NOT)?)?NULL',
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'(NOT )?IN',
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'(NOT )?I?LIKE',
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'AND', 'OR', 'XOR',
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'BETWEEN',
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// order, group, limit ..
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'ASC',
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'DESC',
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'OFFSET',
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));
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$sql = preg_replace(array(
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'/\b('.implode('|', $newlines).')\b/',
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'/\b('.implode('|', $keywords).')\b/',
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'/(\/\*.*\*\/)/',
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'/(`[^`.]*`)/',
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'/(([0-9a-zA-Z$_]+)\.([0-9a-zA-Z$_]+))/',
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), array(
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'<br />\\1',
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'<span class="SQLKeyword">\\1</span>',
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'<span class="SQLComment">\\1</span>',
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'<span class="SQLName">\\1</span>',
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'<span class="SQLName">\\1</span>',
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), $sql);
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return $sql;
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}
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/**
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* Rounding to significant digits (sort of like JavaScript's toPrecision()).
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*
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* @param float $number Value to round
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* @param integer $significantFigures Number of significant figures
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*
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* @return float
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*/
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public static function toPrecision($number, $significantFigures = 3)
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{
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if (0 === $number) {
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return 0;
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}
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$significantDecimals = floor($significantFigures - log10(abs($number)));
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$magnitude = pow(10, $significantDecimals);
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$shifted = round($number * $magnitude);
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return number_format($shifted / $magnitude, $significantDecimals);
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}
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}
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