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<?php
namespace Illuminate\Routing;
use LogicException;
use Illuminate\Support\Arr;
use Illuminate\Support\Str;
use UnexpectedValueException;
class RouteAction
{
/**
* Parse the given action into an array.
*
* @param string $uri
* @param mixed $action
* @return array
*/
public static function parse($uri, $action)
{
// If no action is passed in right away, we assume the user will make use of
// fluent routing. In that case, we set a default closure, to be executed
// if the user never explicitly sets an action to handle the given uri.
if (is_null($action)) {
return static::missingAction($uri);
}
// If the action is already a Closure instance, we will just set that instance
// as the "uses" property, because there is nothing else we need to do when
// it is available. Otherwise we will need to find it in the action list.
if (is_callable($action)) {
return ['uses' => $action];
}
// If no "uses" property has been set, we will dig through the array to find a
// Closure instance within this list. We will set the first Closure we come
// across into the "uses" property that will get fired off by this route.
elseif (! isset($action['uses'])) {
$action['uses'] = static::findCallable($action);
}
if (is_string($action['uses']) && ! Str::contains($action['uses'], '@')) {
$action['uses'] = static::makeInvokable($action['uses']);
}
return $action;
}
/**
* Get an action for a route that has no action.
*
* @param string $uri
* @return array
*/
protected static function missingAction($uri)
{
return ['uses' => function () use ($uri) {
throw new LogicException("Route for [{$uri}] has no action.");
}];
}
/**
* Find the callable in an action array.
*
* @param array $action
* @return callable
*/
protected static function findCallable(array $action)
{
return Arr::first($action, function ($value, $key) {
return is_callable($value) && is_numeric($key);
});
}
/**
* Make an action for an invokable controller.
*
* @param string $action
* @return string
*/
protected static function makeInvokable($action)
{
if (! method_exists($action, '__invoke')) {
throw new UnexpectedValueException("Invalid route action: [{$action}].");
}
return $action.'@__invoke';
}
}