openstamanager/lib/util.php

440 lines
13 KiB
PHP

<?php
use Stringy\Stringy as S;
/*
* Funzioni esterne di utilità per il progetto.
*
* @since 2.3
*/
if (!function_exists('array_column')) {
/**
* Pluck an array of values from an array.
*
* @param $array - data
* @param $key - value you want to pluck from array
*
* @since 2.3
*
* @return plucked array only with key data
*/
function array_column($array, $key)
{
return array_map(function ($v) use ($key) {
return is_object($v) ? $v->$key : $v[$key];
}, $array);
}
}
if (!function_exists('starts_with')) {
/**
* Check if a string starts with the given string.
*
* @param string $string
* @param string $starts_with
*
* @return bool
*/
function starts_with($string, $starts_with)
{
//return strpos($string, $starts_with) === 0;
return S::create($string)->startsWith($starts_with);
}
}
if (!function_exists('ends_with')) {
/**
* Check if a string ends with the given string.
*
* @param string $string
* @param string $ends_with
*
* @return bool
*/
function ends_with($string, $ends_with)
{
//return substr($string, -strlen($ends_with)) === $ends_with;
return S::create($string)->endsWith($ends_with);
}
}
if (!function_exists('str_replace_once')) {
/**
* Sostituisce la prima occorenza di una determinata stringa.
*
* @param string $str_pattern
* @param string $str_replacement
* @param string $string
*
* @since 2.3
*
* @return string
*/
function str_replace_once($str_pattern, $str_replacement, $string)
{
if (strpos($string, $str_pattern) !== false) {
$occurrence = strpos($string, $str_pattern);
return substr_replace($string, $str_replacement, strpos($string, $str_pattern), strlen($str_pattern));
}
return $string;
}
}
if (!function_exists('str_contains')) {
/**
* Check if a string contains the given string.
*
* @param string $string
* @param string $contains
*
* @return bool
*/
function str_contains($string, $contains)
{
//return strpos($string, $contains) !== false;
return S::create($string)->contains($contains);
}
}
if (!function_exists('random_string')) {
/**
* Generates a string of random characters.
*
* @throws LengthException If $length is bigger than the available
* character pool and $no_duplicate_chars is
* enabled
*
* @param int $length The length of the string to
* generate
* @param bool $human_friendly Whether or not to make the
* string human friendly by
* removing characters that can be
* confused with other characters (
* O and 0, l and 1, etc)
* @param bool $include_symbols Whether or not to include
* symbols in the string. Can not
* be enabled if $human_friendly is
* true
* @param bool $no_duplicate_chars whether or not to only use
* characters once in the string
*
* @return string
*/
function random_string($length = 16, $human_friendly = true, $include_symbols = false, $no_duplicate_chars = false)
{
$nice_chars = 'ABCDEFGHJKLMNPQRSTUVWXYZabcdefhjkmnprstuvwxyz23456789';
$all_an = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890';
$symbols = '!@#$%^&*()~_-=+{}[]|:;<>,.?/"\'\\`';
$string = '';
// Determine the pool of available characters based on the given parameters
if ($human_friendly) {
$pool = $nice_chars;
} else {
$pool = $all_an;
if ($include_symbols) {
$pool .= $symbols;
}
}
if (!$no_duplicate_chars) {
return substr(str_shuffle(str_repeat($pool, $length)), 0, $length);
}
// Don't allow duplicate letters to be disabled if the length is
// longer than the available characters
if ($no_duplicate_chars && strlen($pool) < $length) {
throw new \LengthException('$length exceeds the size of the pool and $no_duplicate_chars is enabled');
}
// Convert the pool of characters into an array of characters and
// shuffle the array
$pool = str_split($pool);
$poolLength = count($pool);
$rand = mt_rand(0, $poolLength - 1);
// Generate our string
for ($i = 0; $i < $length; ++$i) {
$string .= $pool[$rand];
// Remove the character from the array to avoid duplicates
array_splice($pool, $rand, 1);
// Generate a new number
if (($poolLength - 2 - $i) > 0) {
$rand = mt_rand(0, $poolLength - 2 - $i);
} else {
$rand = 0;
}
}
return $string;
}
}
if (!function_exists('secure_random_string')) {
/**
* Generate secure random string of given length
* If 'openssl_random_pseudo_bytes' is not available
* then generate random string using default function.
*
* Part of the Laravel Project <https://github.com/laravel/laravel>
*
* @param int $length length of string
*
* @return bool
*/
function secure_random_string($length = 32)
{
if (function_exists('openssl_random_pseudo_bytes')) {
$bytes = openssl_random_pseudo_bytes($length * 2);
if ($bytes === false) {
throw new \LengthException('$length is not accurate, unable to generate random string');
}
return substr(str_replace(['/', '+', '='], '', base64_encode($bytes)), 0, $length);
}
return random_string($length);
}
}
if (!function_exists('download')) {
/**
* Transmit headers that force a browser to display the download file
* dialog. Cross browser compatible. Only fires if headers have not
* already been sent.
*
* @param string $filename The name of the filename to display to
* browsers
* @param string $content The content to output for the download.
* If you don't specify this, just the
* headers will be sent
*
* @since 2.3
*
* @return bool
*/
function download($file, $filename = null)
{
ob_end_clean();
if (!headers_sent()) {
$filename = !empty($filename) ? $filename : basename($file);
// Required for some browsers
if (ini_get('zlib.output_compression')) {
ini_set('zlib.output_compression', 'Off');
}
header('Pragma: public');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
// Required for certain browsers
header('Cache-Control: private', false);
header('Content-Disposition: attachment; filename="'.basename(str_replace('"', '', $filename)).'";');
header('Content-Type: application/octet-stream');
header('Content-Transfer-Encoding: binary');
header('Content-Length: '.filesize($file));
$open = fopen($file, 'rb');
while (!feof($open)) {
echo fread($open, 1024 * 8);
ob_flush();
flush();
}
return true;
}
return false;
}
}
if (!function_exists('safe_truncate')) {
/**
* Truncate a string to a specified length without cutting a word off.
*
* @param string $string The string to truncate
* @param int $length The length to truncate the string to
* @param string $append Text to append to the string IF it gets
* truncated, defaults to '...'
*
* @since 2.3
*
* @return string
*/
function safe_truncate($string, $length, $append = '...')
{
$ret = substr($string, 0, $length);
$last_space = strrpos($ret, ' ');
if ($last_space !== false && $string != $ret) {
$ret = substr($ret, 0, $last_space);
}
if ($ret != $string) {
$ret .= $append;
}
return $ret;
}
}
if (!function_exists('isHTTPS')) {
/**
* Checks to see if the page is being served over SSL or not.
*
* @since 2.3
*
* @return bool
*/
function isHTTPS($trust_proxy_headers = false)
{
if (!empty($_SERVER['HTTPS']) && strtolower($_SERVER['HTTPS']) !== 'off') {
// Check the standard HTTPS headers
return true;
} elseif ($trust_proxy_headers && isset($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] === 'https') {
// Check proxy headers if allowed
return true;
} elseif (!empty($_SERVER['HTTP_FRONT_END_HTTPS']) && strtolower($_SERVER['HTTP_FRONT_END_HTTPS']) !== 'off') {
return true;
}
return false;
}
}
if (!function_exists('color_darken')) {
/**
* Scurisce un determinato colore.
*
* @param unknown $color
* @param number $dif
*
* @return string
*/
function color_darken($color, $dif = 20)
{
$color = str_replace('#', '', $color);
if (strlen($color) != 6) {
return '000000';
}
$rgb = '';
for ($x = 0; $x < 3; ++$x) {
$c = hexdec(substr($color, (2 * $x), 2)) - $dif;
$c = ($c < 0) ? 0 : dechex($c);
$rgb .= (strlen($c) < 2) ? '0'.$c : $c;
}
return '#'.$rgb;
}
}
if (!function_exists('color_inverse')) {
/**
* Inverte il colore inserito.
*
* @see http://www.splitbrain.org/blog/2008-09/18-calculating_color_contrast_with_php
*
* @param string $start_colour
*
* @return string
*/
function color_inverse($start_colour)
{
$R1 = hexdec(substr($start_colour, 1, 2));
$G1 = hexdec(substr($start_colour, 3, 2));
$B1 = hexdec(substr($start_colour, 5, 2));
$R2 = 255;
$G2 = 255;
$B2 = 255;
$L1 = 0.2126 * pow($R1 / 255, 2.2) + 0.7152 * pow($G1 / 255, 2.2) + 0.0722 * pow($B1 / 255, 2.2);
$L2 = 0.2126 * pow($R2 / 255, 2.2) + 0.7152 * pow($G2 / 255, 2.2) + 0.0722 * pow($B2 / 255, 2.2);
if ($L1 > $L2) {
$lum = ($L1 + 0.05) / ($L2 + 0.05);
} else {
$lum = ($L2 + 0.05) / ($L1 + 0.05);
}
if ($lum >= 2.5) {
return '#fff';
} else {
return '#000';
}
}
}
if (!function_exists('readSQLFile')) {
/**
* Restituisce l'insieme delle query presente nel file specificato.
*
* @param string $filename Percorso per il file
* @param string $delimiter Delimitatore delle query
*
* @since 2.3
*
* @return array
*/
function readSQLFile($filename, $delimiter = ';')
{
$inString = false;
$escChar = false;
$query = '';
$stringChar = '';
$queryLine = [];
$queryBlock = file_get_contents($filename);
$sqlRows = explode("\n", $queryBlock);
$delimiterLen = strlen($delimiter);
do {
$sqlRow = current($sqlRows)."\n";
$sqlRowLen = strlen($sqlRow);
for ($i = 0; $i < $sqlRowLen; ++$i) {
if ((substr(ltrim($sqlRow), $i, 2) === '--') && !$inString) {
break;
}
$znak = substr($sqlRow, $i, 1);
if ($znak === '\'' || $znak === '"') {
if ($inString) {
if (!$escChar && $znak === $stringChar) {
$inString = false;
}
} else {
$stringChar = $znak;
$inString = true;
}
}
if ($znak === '\\' && substr($sqlRow, $i - 1, 2) !== '\\\\') {
$escChar = !$escChar;
} else {
$escChar = false;
}
if (substr($sqlRow, $i, $delimiterLen) === $delimiter) {
if (!$inString) {
$query = trim($query);
$delimiterMatch = [];
if (preg_match('/^DELIMITER[[:space:]]*([^[:space:]]+)$/i', $query, $delimiterMatch)) {
$delimiter = $delimiterMatch[1];
$delimiterLen = strlen($delimiter);
} else {
$queryLine[] = $query;
}
$query = '';
continue;
}
}
$query .= $znak;
}
} while (next($sqlRows) !== false);
return $queryLine;
}
}