<?php

namespace Illuminate\Validation;

use Illuminate\Contracts\Validation\ValidationException;
use Illuminate\Contracts\Validation\UnauthorizedException;
// use name space
/**
 * Provides default implementation of ValidatesWhenResolved contract.
 */
trait ValidatesWhenResolvedTrait
{// other type of class can be use in more please
    /**
     * Validate the class instance.
     *
     * @return void
     */
    public function validate()
    {
        $instance = $this->getValidatorInstance();// get Validator Instance

        if (! $this->passesAuthorization()) {// determine Authorization
            $this->failedAuthorization();
        } elseif (! $instance->passes()) {// passes
            $this->failedValidation($instance);//failed Validation
        }
    }// Validate the class instance.

    /**
     * Get the validator instance for the request.
     *
     * @return \Illuminate\Validation\Validator
     */
    protected function getValidatorInstance()
    {
        return $this->validator();
    }//Get the validator instance for the request.

    /**
     * Handle a failed validation attempt.
     *
     * @param  \Illuminate\Validation\Validator  $validator
     * @return mixed
     *
     * @throws \Illuminate\Contracts\Validation\ValidationException
     */
    protected function failedValidation(Validator $validator)
    {
        throw new ValidationException($validator);
    }// yes we need do some thing for the bad handle, the best way is throw exception
   // so this function name is failed validation

    /**
     * Determine if the request passes the authorization check.
     *
     * @return bool
     */
    protected function passesAuthorization()
    {
        if (method_exists($this, 'authorize')) {
            return $this->authorize();
        }

        return true;
    }// Determine if the request passes the authorization check.
   // if method_exists this

    /**
     * Handle a failed authorization attempt.
     *
     * @throws \Illuminate\Contracts\Validation\UnauthorizedException
     */
    protected function failedAuthorization()
    {
        throw new UnauthorizedException;//throw new Exception
    }//Handle a failed authorization attempt
}