blue-twilight/app/Helpers/MiscHelper.php

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<?php
namespace App\Helpers;
class MiscHelper
{
public static function capitaliseWord($word)
{
$word = strtolower($word);
$wordLetters = [];
preg_match_all('/\b[a-z]/i', $word, $wordLetters, PREG_OFFSET_CAPTURE);
foreach ($wordLetters[0] as $wordLetter)
{
$word = substr_replace($word, strtoupper($wordLetter[0]), $wordLetter[1], 1);
}
return $word;
}
public static function convertToBytes($val)
{
if(empty($val))return 0;
$val = trim($val);
preg_match('#([0-9]+)[\s]*([a-z]+)#i', $val, $matches);
$last = '';
if(isset($matches[2])){
$last = $matches[2];
}
if(isset($matches[1])){
$val = (int) $matches[1];
}
switch (strtolower($last))
{
case 'g':
case 'gb':
$val *= 1024;
case 'm':
case 'mb':
$val *= 1024;
case 'k':
case 'kb':
$val *= 1024;
}
return (int) $val;
}
/**
* Convert a decimal (e.g. 3.5) to a fraction (e.g. 7/2).
* Adapted from: http://jonisalonen.com/2012/converting-decimal-numbers-to-ratios/
*
* @param float $decimal the decimal number.
*
* @return array|bool a 1/2 would be [1, 2] array (this can be imploded with '/' to form a string)
*/
public static function decimalToFraction($decimal)
{
if ($decimal < 0 || !is_numeric($decimal)) {
// Negative digits need to be passed in as positive numbers
// and prefixed as negative once the response is imploded.
return false;
}
if ($decimal == 0) {
return [0, 0];
}
$tolerance = 1.e-4;
$numerator = 1;
$h2 = 0;
$denominator = 0;
$k2 = 1;
$b = 1 / $decimal;
do {
$b = 1 / $b;
$a = floor($b);
$aux = $numerator;
$numerator = $a * $numerator + $h2;
$h2 = $aux;
$aux = $denominator;
$denominator = $a * $denominator + $k2;
$k2 = $aux;
$b = $b - $a;
} while (abs($decimal - $numerator / $denominator) > $decimal * $tolerance);
return [
$numerator,
$denominator
];
}
public static function getEnvironmentFilePath()
{
return sprintf('%s/.env', dirname(dirname(__DIR__)));
}
public static function getEnvironmentSetting($settingName)
{
$envFile = MiscHelper::getEnvironmentFilePath();
if (!file_exists($envFile))
{
return null;
}
$matches = null;
if (preg_match(sprintf('/^\s*%s\s*=\s*(.+)$/im', preg_quote($settingName)), file_get_contents($envFile), $matches))
{
return trim($matches[1]);
}
return null;
}
public static function isAppInstalled()
{
return MiscHelper::getEnvironmentSetting('APP_INSTALLED');
}
/**
* Tests whether the provided URL belongs to the current application (i.e. both scheme and hostname match.)
* @param $url
* @return bool
*/
public static function isSafeUrl($url)
{
$parts = parse_url($url);
$validParts = parse_url(url('/'));
return ($parts['scheme'] == $validParts['scheme'] && $parts['host'] == $validParts['host']);
}
public static function randomString($length = 10)
{
$seed = 'abcdefghijklmnopqrstuvwxyz01234567890';
$string = '';
while (strlen($string) < $length)
{
$string .= substr($seed, rand(0, strlen($seed) - 1), 1);
}
return $string;
}
public static function setEnvironmentSetting($settingName, $value)
{
if (is_null(MiscHelper::getEnvironmentSetting($settingName)))
{
return file_put_contents(MiscHelper::getEnvironmentFilePath(), sprintf('%s=%s', $settingName, $value) . PHP_EOL, FILE_APPEND);
}
return false;
}
}