如何优雅的使用 laravel 的 validator验证方法

web 开发过程中经常会需要进行参数验证，laravel 中我们常用 validator 或者 request 这两种方法来进行验证，但是这两种验证都不是很方便进行自定义提示信息，自定义验证规则，所以下面来介绍一种很方便的用法：

新建抽象类

<?php

namespace App\Http\Validators;

use Validator;

abstract class AbstractValidator
{

 /**
  * Validator
  *
  * @var \Illuminate\Validation\Factory
  */
 protected $validator;

 /**
  * Validation data key => value array
  *
  * @var array
  */
 protected $data = array();

 /**
  * Validation errors
  *
  * @var array
  */
 protected $errors = array();

 /**
  * Validation rules
  *
  * @var array
  */
 protected $rules = array();

 /**
  * Validation messages
  *
  * @var array
  */
 protected $messages = array();

 /**
  * Validation codes
  *
  * @var array
  */
 protected $codes = array();

 public function __construct(array $data)
 {
  $this->data = $data;
  $this->before();
  $this->validator = Validator::make($this->data, $this->rules, $this->messages);
  $this->after();
 }

 /**
  * Set data to validate
  *
  * @return validator
  */
 public function getValidator()
 {
  return $this->validator;
 }

 /**
  * Set data to validate
  *
  * @return $this
  */
 public function with(array $data)
 {
  $this->data = $data;
  $this->before();
  $this->validator = $this->validator->make($this->data, $this->rules, $this->messages);
  $this->after();
  return $this;
 }

 /**
  * Validation passes or fails
  *
  * @return boolean
  */
 public function passes()
 {
  if ($this->validator->fails()) {
   $this->errors = $this->validator->messages();

   return false;
  }

  return true;
 }

 /**
  * Return errors, if any
  *
  * @return array
  */
 public function errors()
 {
  return $this->errors;
 }

 /**
  * Return errors codes, if any
  *
  * @return array
  */
 public function getCodes()
 {
  return $this->codes;
 }

 /**
  * getRules
  *
  * @return array
  */
 public function getRules()
 {
  return $this->rules;
 }

 /**
  * getData
  *
  * @return array
  */
 public function getData()
 {
  return $this->data;
 }

 /**
  * getErrors
  *
  * @return array
  */
 public function getErrors()
 {
  return $this->errors;
 }

 /**
  * getMessages
  *
  * @return array
  */
 public function getMessages()
 {
  return $this->messages;
 }

 /**
  * setRule
  *
  * @param string $key
  * @param string $value
  *
  * @return $this
  */
 public function setRule($key, $value)
 {
  $this->rules[$key] = $value;

  return $this;
 }

 /**
  * emptyRules
  *
  * @return $this
  */
 public function emptyRules()
 {
  $this->rules = array();

  return $this;
 }

 /**
  * sometimes
  *
  * @param string  $attribute
  * @param string|array $rules
  * @param callable  $callback
  *
  * @return $this
  */
 public function sometimes($attribute, $rules, callable $callback)
 {
  $this->validator->sometimes($attribute, $rules, $callback);

  return $this;
 }

 /**
  * resolver
  *
  * @param Closure $resolver
  *
  * @return $this
  */
 public function resolver(Closure $resolver)
 {
  Validator::resolver($resolver);

  return $this;
 }

 /**
  * replacer
  *
  * @param Closure $resolver
  *
  * @return $this
  */
 public function replacer($replace, Closure $resolver)
 {
  Validator::replacer($replace, $resolver);

  return $this;
 }

 /**
  * extendImplicit
  *
  * @param Closure $resolver
  *
  * @return $this
  */
 public function extendImplicit($extendImplicit, Closure $resolver)
 {
  Validator::extendImplicit($extendImplicit, $resolver);

  return $this;
 }

 /**
  * extend
  *
  * @param string   $rule
  * @param \Closure|string $extension
  * @param string   $message
  *
  * @return $this
  */
 public function extend($rule, $extension, $message = null)
 {
  Validator::extend($rule, $extension, $message);

  return $this;
 }

 /**
  * before (extend(),resolver())
  *
  * @return $this
  */
 public function before()
 {
 }

 /**
  * after(sometimes())
  *
  * @return $this
  */
 public function after()
 {
 }
}

新建中间件

<?php

namespace App\Http\Middleware;

use Closure;
use \Illuminate\Http\Request;

class ValidateAdminMiddleware
{
 /**
  * This namespace is applied to the controller routes in your routes file.
  *
  * In addition, it is set as the URL generator's root namespace.
  *
  * @var string
  */
 protected $namespace = 'App\Http\Validators';

 /**
  * Handle an incoming request.
  *
  * @param \Illuminate\Http\Request $request
  * @param \Closure     $next
  *
  * @return mixed
  */
 public function handle(Request $request, Closure $next, $validator = null)
 {
  if ($request->isMethod('POST')) {
   $type = $request->segment(1);
   if ($validator) {
    $validator = $this->namespace . '\\' . studly_case($type) . '\\' . studly_case($validator) . 'Validator';
    $validator = new $validator($request->all());

    if (!$validator->passes()) {
     if ($request->isAjax()) {
      return $validator->errors()->first();
     } else {
      return redirect()->back()
      ->withErrors($validator->getValidator())
      ->withInput();
     }
    }
   }
  }
  return $next($request);
 }
}

新建 TestTestValidator

<?php

namespace App\Http\Validators\Admin;

use App\Http\Validators\AbstractValidator;

class TestValidator extends AbstractValidator
{
 /**
  * Validation rules
  *
  * @var Array
  */
 protected $rules = array(
  'name' => ['required', 'test', 'min:1'],
 );

 /**
  * Validation messages
  *
  * @var Array
  */
 protected $messages = array(
  'name.required' => '必填',
  'name.min' => '最少1个字符',
  'name.test' => '测试',
 );

 /**
  * 自定义验证规则或者扩展Validator类
  */
 public function before()
 {
  $this->extend('test', function ($attribute, $value, $parameters) {
   return bool;
  });
 }
}

路由中如何使用

Route::post('/', ['middleware' => ['valiAdmin:Test'], 'uses' => 'IndexController@test']);

具体使用可以自行配置~

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