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<?php |
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namespace Spatie\Permission; |
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use Illuminate\Support\Collection; |
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use Illuminate\Database\Eloquent\Model; |
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class Guard |
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{ |
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/** |
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* Return a collection of guard names suitable for the $model. |
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* |
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* @param string|Model $model model class object or name |
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* @return Collection |
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*/ |
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public static function getNames($model): Collection |
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{ |
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if (is_object($model)) { |
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if (\method_exists($model, 'guardName')) { |
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$guardName = $model->guardName(); |
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} else { |
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$guardName = $model->guard_name ?? null; |
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} |
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} |
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if (! isset($guardName)) { |
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$class = is_object($model) ? get_class($model) : $model; |
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$guardName = (new \ReflectionClass($class))->getDefaultProperties()['guard_name'] ?? null; |
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} |
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if ($guardName) { |
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return collect($guardName); |
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} |
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return self::getConfigAuthGuards($class); |
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} |
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/** |
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* Get list of relevant guards for the $class model based on config(auth) settings. |
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* |
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* Lookup flow: |
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* - get names of models for guards defined in auth.guards where a provider is set |
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* - filter for provider models matching the model $class being checked |
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* - keys() gives just the names of the matched guards |
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* - if logged in, filter out any guards for which the user does not pass the auth->guard->check() test |
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* - return collection of guard names |
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* |
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* @param string $class |
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* @return Collection |
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*/ |
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protected static function getConfigAuthGuards(string $class): Collection |
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{ |
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return collect(config('auth.guards')) |
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->map(function ($guard) { |
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if (! isset($guard['provider'])) { |
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return; |
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} |
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return config("auth.providers.{$guard['provider']}.model"); |
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}) |
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->filter(function ($model) use ($class) { |
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return $class === $model; |
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}) |
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->keys() |
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->filter(function ($guard) { |
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return app('request')->user() ? app('auth')->guard($guard)->check() : true; |
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}); |
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} |
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/** |
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* Lookup a guard name relevant for the $class model and the current user. |
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* |
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* @param string|Model $class model class object or name |
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* @return string guard name |
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*/ |
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public static function getDefaultName($class): string |
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{ |
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$default = config('auth.defaults.guard'); |
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return static::getNames($class)->first() ?: $default; |
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} |
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} |
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If you define a variable conditionally, it can happen that it is not defined for all execution paths.
Let’s take a look at an example:
In the above example, the variable $x is defined if you pass “foo” or “bar” as argument for $a. However, since the switch statement has no default case statement, if you pass any other value, the variable $x would be undefined.
Available Fixes
Check for existence of the variable explicitly:
Define a default value for the variable:
Add a value for the missing path: