TranslatableTrait.php

<?php 

namespace App\Traits\Models;

use Illuminate\Database\Eloquent\Model;
use App\Models\Translation;
use \LaravelLocalization;
use DB;


trait TranslatableTrait
{

    public function __get($key)
    {
        if(isset($this->translatable) && in_array($key, $this->translatable))
        {
            //translate and return
            return $this->getTranslation($key);
        }
        else
        {
            //don't translate, call parent
            return parent::__get($key);
        }
    }
    //can't use __set since when the model is created there isn't any ID yet, so we first need to save the model and then the translations
    public function save(array $options = [])
    {
        $result = parent::save($options);
        if($result)
        {
            if(isset($this->translatable))
            {
                $table = $this->getTable();
                $instance = DB::table($table)->where("id",$this->id)->first();
                foreach($this->translatable as $key)
                {
                    $this->setTranslation($key,$instance->{$key});    
                }
            }
            return true;
        }
        else
        {
            return false;
        }
    }

    public function trans($key,$locale)
    {
        return $this->getTranslation($key,$locale);
    }

    public function getTranslation( $key, $locale = NULL )
    {
        if(!$locale)
        {
            $locale = LaravelLocalization::getCurrentLocale();
        }
        //model class, model id, locale code
        $translation = Translation::where("model_class",get_class($this))->where("model_id",$this->id)->where("key",$key)->where("locale",$locale)->first();        
        if(!$translation)
        {
            return "";
            // return parent::__get($key);
        }
        else
        {
            return $translation->value;
        }
    }

    public function setTranslation($key,$value,$locale = NULL)
    {
        if(!$locale)
        {
            $locale = LaravelLocalization::getCurrentLocale();
        }
        $translation = Translation::where("model_class",get_class($this))->where("model_id",$this->id)->where("key",$key)->where("locale",$locale)->first();       
        if(!$translation)
        {
            $translation = new Translation;
            $translation->model_class = get_class($this);
            $translation->model_id = $this->id;
            $translation->key = $key;
            $translation->locale = $locale;
            $translation->value = $value;
        }
        else
        {
            $translation->value = $value;
        }        
        
        return $translation->save();
    }

    public function toJson($locale = NULL)
    {
        if(!$locale)
        {
            $locale = LaravelLocalization::getCurrentLocale();
        }
        $array = $this->toArray();
        if(isset($this->translatable))
        {
            foreach($this->translatable as $value)
            {
                $array[$value] = $this->getTranslation($value,$locale);
            }
        }
        return json_encode($array);
    }

    public function delete()
    {
        Translation::where("model_class",get_class($this))->where("model_id",$this->id)->delete();       
        return parent::delete();
    }

}