ValidateModelTrait

<?php
namespace App\Models\Traits;

use \Validator;

trait ValidateModelTrait
{
  private $errors;

  private $objValidator;

  public function getRules()
  {
    $arrAfterRules = $this::$rules;
    $callback = function( $found ) {
      $value = $this->{$found[1]};
      if( $value === false ) {
        return 'false';
      }
      if( $value === true ) {
        return 'true';
      }
      if( $value === null ) {
        return 'NULL';
      }
      return $value;
    };
    foreach( $this::$rules as $fieldRule => $rule ) {
      $arrAfterRules[ $fieldRule ] = preg_replace_callback(
        "/\{\{([^\}]*)\}\}/", 
        $callback,
        $rule
      );
    }
    return $arrAfterRules;
  }
  
  public function modelValidate( $data )
  {
    return true;
  }

  public function validate($data = null)
  {    
    if( $data === null ) {
      $data = $this->toArray();
    }
    
    // make a new validator object
    $this->objValidator = Validator::make($data, $this->getRules());

    // check for failure
    if ($this->objValidator->fails())
    {
        // set errors and return false
        $this->errors = $this->objValidator->errors();
        return false;
    }


    // validation pass
    return $this->modelValidate( $data );
  }

  public function isValid()
  {
    return $this->validate();
  }
  
  public function errors()
  {
    $this->validate();
    return $this->errors;
  }

  public function getValidator()
  {
    $this->validate();
    return $this->objValidator;
  }
}