BookStack/app/helpers.php

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PHP
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<?php
if (!function_exists('versioned_asset')) {
/**
* Get the path to a versioned file.
*
* @param string $file
* @return string
*
* @throws \InvalidArgumentException
*/
function versioned_asset($file)
{
static $manifest = null;
if (is_null($manifest)) {
$manifest = json_decode(file_get_contents(public_path('build/manifest.json')), true);
}
if (isset($manifest[$file])) {
return '/' . $manifest[$file];
}
if (file_exists(public_path($file))) {
return '/' . $file;
}
throw new InvalidArgumentException("File {$file} not defined in asset manifest.");
}
}
/**
* Check if the current user has a permission.
* If an ownable element is passed in the permissions are checked against
* that particular item.
* @param $permission
* @param \BookStack\Ownable $ownable
* @return mixed
*/
function userCan($permission, \BookStack\Ownable $ownable = null)
{
if (!auth()->check()) return false;
if ($ownable === null) {
return auth()->user() && auth()->user()->can($permission);
}
// Check permission on ownable item
$permissionBaseName = strtolower($permission) . '-';
$hasPermission = false;
if (auth()->user()->can($permissionBaseName . 'all')) $hasPermission = true;
if (auth()->user()->can($permissionBaseName . 'own') && $ownable->createdBy && $ownable->createdBy->id === auth()->user()->id) $hasPermission = true;
if (!$ownable instanceof \BookStack\Entity) return $hasPermission;
// Check restrictions on the entity
$restrictionService = app('BookStack\Services\RestrictionService');
$explodedPermission = explode('-', $permission);
$action = end($explodedPermission);
$hasAccess = $restrictionService->checkIfEntityRestricted($ownable, $action);
$restrictionsSet = $restrictionService->checkIfRestrictionsSet($ownable, $action);
return ($hasAccess && $restrictionsSet) || (!$restrictionsSet && $hasPermission);
}
/**
* Helper to access system settings.
* @param $key
* @param bool $default
* @return mixed
*/
function setting($key, $default = false)
{
$settingService = app('BookStack\Services\SettingService');
return $settingService->get($key, $default);
}