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<?php
namespace Illuminate\Foundation\Auth\Access;
use Illuminate\Contracts\Auth\Access\Gate;
use Illuminate\Support\Str;
trait AuthorizesRequests
{
/**
* Authorize a given action for the current user.
*
* @param mixed $ability
* @param mixed|array $arguments
* @return \Illuminate\Auth\Access\Response
*
* @throws \Illuminate\Auth\Access\AuthorizationException
*/
public function authorize($ability, $arguments = [])
{
[$ability, $arguments] = $this->parseAbilityAndArguments($ability, $arguments);
return app(Gate::class)->authorize($ability, $arguments);
}
/**
* Authorize a given action for a user.
*
* @param \Illuminate\Contracts\Auth\Authenticatable|mixed $user
* @param mixed $ability
* @param mixed|array $arguments
* @return \Illuminate\Auth\Access\Response
*
* @throws \Illuminate\Auth\Access\AuthorizationException
*/
public function authorizeForUser($user, $ability, $arguments = [])
{
[$ability, $arguments] = $this->parseAbilityAndArguments($ability, $arguments);
return app(Gate::class)->forUser($user)->authorize($ability, $arguments);
}
/**
* Guesses the ability's name if it wasn't provided.
*
* @param mixed $ability
* @param mixed|array $arguments
* @return array
*/
protected function parseAbilityAndArguments($ability, $arguments)
{
if (is_string($ability) && ! str_contains($ability, '\\')) {
return [$ability, $arguments];
}
$method = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 3)[2]['function'];
return [$this->normalizeGuessedAbilityName($method), $ability];
}
/**
* Normalize the ability name that has been guessed from the method name.
*
* @param string $ability
* @return string
*/
protected function normalizeGuessedAbilityName($ability)
{
$map = $this->resourceAbilityMap();
return $map[$ability] ?? $ability;
}
/**
* Authorize a resource action based on the incoming request.
*
* @param string|array $model
* @param string|array|null $parameter
* @param array $options
* @param \Illuminate\Http\Request|null $request
* @return void
*/
public function authorizeResource($model, $parameter = null, array $options = [], $request = null)
{
$model = is_array($model) ? implode(',', $model) : $model;
$parameter = is_array($parameter) ? implode(',', $parameter) : $parameter;
$parameter = $parameter ?: Str::snake(class_basename($model));
$middleware = [];
foreach ($this->resourceAbilityMap() as $method => $ability) {
$modelName = in_array($method, $this->resourceMethodsWithoutModels()) ? $model : $parameter;
$middleware["can:{$ability},{$modelName}"][] = $method;
}
foreach ($middleware as $middlewareName => $methods) {
$this->middleware($middlewareName, $options)->only($methods);
}
}
/**
* Get the map of resource methods to ability names.
*
* @return array
*/
protected function resourceAbilityMap()
{
return [
'index' => 'viewAny',
'show' => 'view',
'create' => 'create',
'store' => 'create',
'edit' => 'update',
'update' => 'update',
'destroy' => 'delete',
];
}
/**
* Get the list of resource methods which do not have model parameters.
*
* @return array
*/
protected function resourceMethodsWithoutModels()
{
return ['index', 'create', 'store'];
}
}
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