<?php
/**
 * Created by PhpStorm.
 * User: xiaofeng
 * Date: 2018/10/7
 * Time: 5:55 PM
 */
namespace common\api;
use common\models\Characteristic;
use Yii;
class Label{

    //特色主题
    public function Characteristic($id,$num = 3)
    {
            $cache = Yii::$app->cache;
//            $cache->delete(Yii::$app->params['cacheKey']['characteristic']);
            $cacheData = $cache->get(Yii::$app->params['cacheKey']['characteristic']);
            if(!$cacheData)
            {
                $char =  \common\models\Characteristic::find();
                $char->andWhere(['del'=>1]);
                $char->andWhere(['is_show'=>1]);
                $data = $char->asArray()->all();
                if(!empty($data))
                {
                    $cacheData = array_column($data,'name','id');
                    $cache->set(Yii::$app->params['cacheKey']['characteristic'],$cacheData);
                }
            }


            $resultData = [];

            if(is_array($id))
            {
                $charData = [];
                foreach ($cacheData as $key=>$val)
                {
                    if(in_array($key,$id))
                    {
                        $charData[$key] = $val;
                    }
                }

                if(!empty($charData) && count($charData)>$num)
                {
                   $rand = array_rand($charData,3);
                    $resultData[] = $cacheData[$rand[0]];
                    $resultData[] = $cacheData[$rand[1]];
                    $resultData[] = $cacheData[$rand[2]];
                }
                else
                {
                    $resultData = $charData;
                }
            }
                return $resultData;
    }
}