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Utils.php
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Utils.php
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<?php
namespace App;
use Carbon\Carbon;
use Illuminate\Support\Facades\Auth;
use Ramsey\Uuid\Uuid;
/**
* Small utility functions for App.
*/
class Utils
{
/**
* Return the number of days in the month prior to this one.
*
* @return int
*/
public static function daysInLastMonth()
{
$start = new Carbon('first day of last month');
$end = new Carbon('last day of last month');
return $start->diffInDays($end) + 1;
}
/**
* Provide all unique combinations of elements in $input, with order and duplicates irrelevant.
*
* @param array $input The input array of elements.
*
* @return array[]
*/
public static function powerSet(array $input): array
{
$output = [];
for ($x = 0; $x < count($input); $x++) {
self::combine($input, $x + 1, 0, [], 0, $output);
}
return $output;
}
/**
* Returns the current user's email address or null.
*
* @return string
*/
public static function userEmailOrNull(): ?string
{
$user = Auth::user();
if (!$user) {
return null;
}
return $user->email;
}
/**
* Returns a UUID in the form of an integer.
*
* @return integer
*/
public static function uuidInt(): int
{
$hex = Uuid::uuid4();
$bin = pack('h*', str_replace('-', '', $hex));
$ids = unpack('L', $bin);
$id = array_shift($ids);
return $id;
}
/**
* Returns a UUID in the form of a string.
*
* @return string
*/
public static function uuidStr(): string
{
return Uuid::uuid4()->toString();
}
private static function combine($input, $r, $index, $data, $i, &$output): void
{
$n = count($input);
// Current cobination is ready
if ($index == $r) {
$output[] = array_slice($data, 0, $r);
return;
}
// When no more elements are there to put in data[]
if ($i >= $n) {
return;
}
// current is included, put next at next location
$data[$index] = $input[$i];
self::combine($input, $r, $index + 1, $data, $i + 1, $output);
// current is excluded, replace it with next (Note that i+1
// is passed, but index is not changed)
self::combine($input, $r, $index, $data, $i + 1, $output);
}
/**
* Create self URL
*
* @param string $route Route/Path
*
* @return string Full URL
*/
public static function serviceUrl(string $route): string
{
return trim(\config('app.public_url'), '/') . '/' . ltrim($route, '/');
// TODO: Investigate why it does not work
$url = \secure_url($route);
$app_url = trim(\config('app.url'), '/');
$pub_url = trim(\config('app.public_url'), '/');
if ($pub_url != $app_url) {
$url = str_replace($app_url, $pub_url, $url);
}
return $url;
}
/**
* Create a configuration/environment data to be passed to
* the UI
*
* @todo For a lack of better place this is put here for now
*
* @return array Configuration data
*/
public static function uiEnv(): array
{
$opts = ['app.name', 'app.url', 'app.domain'];
$env = \app('config')->getMany($opts);
$countries = include resource_path('countries.php');
$env['countries'] = $countries ?: [];
$isAdmin = strpos(request()->getHttpHost(), 'admin.') === 0;
$env['jsapp'] = $isAdmin ? 'admin.js' : 'user.js';
$env['paymentProvider'] = \config('services.payment_provider');
$env['stripePK'] = \config('services.stripe.public_key');
return $env;
}
}

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