<?php
  
  namespace Illuminate\Contracts\Validation;
  
  use Illuminate\Contracts\Support\MessageProvider;
  
  interface Validator extends MessageProvider
  {
      /**
       * Run the validator's rules against its data.
       *
       * @return array
       *
       * @throws \Illuminate\Validation\ValidationException
       */
      public function validate();
  
      /**
       * Get the attributes and values that were validated.
       *
       * @return array
       *
       * @throws \Illuminate\Validation\ValidationException
       */
      public function validated();
  
      /**
       * Determine if the data fails the validation rules.
       *
       * @return bool
       */
      public function fails();
  
      /**
       * Get the failed validation rules.
       *
       * @return array
       */
      public function failed();
  
      /**
       * Add conditions to a given field based on a Closure.
       *
       * @param  string|array  $attribute
       * @param  string|array  $rules
       * @param  callable  $callback
       * @return $this
       */
      public function sometimes($attribute, $rules, callable $callback);
  
      /**
       * Add an after validation callback.
       *
       * @param  callable|string  $callback
       * @return $this
       */
      public function after($callback);
  
      /**
       * Get all of the validation error messages.
       *
       * @return \Illuminate\Support\MessageBag
       */
      public function errors();
  }