<?php

namespace app\models;

use Yii;
use app\models\Model;

/**
 * This is the model class for table "{{%cat}}".
 *
 * @property int $id ID
 * @property int $cx_mch_id 平台商户ID
 * @property int $type 类型
 * @property string $name 名称
 * @property string|null $desc 描述
 * @property string|null $img_url 图片
 * @property int $parent_id 父ID
 * @property int $sort 排序，默认100，升序
 * @property int $is_delete 是否删除，0=否，1=是
 * @property int $created_at 添加时间
 * @property int $updated_at 更新时间
 * @property int $deleted_at 删除时间
 * @property int $status 是否启用，0=否，1=是
 * @property int $is_hide 是否隐藏，0=否，1=是
 * @property string|null $big_img_url 大图
 * @property string|null $advert_pic 广告图
 * @property string|null $advert_url 广告链接
 * @property int $advert_url_type 广告链接类型
 * @property string|null $advert_open_params 广告链接打开参数
 */
class Cat extends \yii\db\ActiveRecord
{
    /**         ---TYPE START---        */
    
    const TYPE_GOODS = 0; //普通商品
    
    const TYPE_POST_DEFAULT = 2;        //文章分类
    const TYPE_FEEDBACK = 3;    //意见反馈分类
    const TYPE_FAQ = 5;         //帮助文档分类
    
    const TYPE_INTEGRAL_GOODS = 7;         //积分商品分类
    
    /**         ---TYPE END---        */
    
    const IS_YES = 1;
    const IS_NO = 0;
    

    /**
     *
     * @var 按照parent建立索引的标签数组，提高效率无需重复获取数据库数据； 
     */
    public static $parentTags = [];   
    
    
    /**
     * {@inheritdoc}
     */
    public static function tableName()
    {
        return '{{%cat}}';
    }

    /**
     * {@inheritdoc}
     */
    public function rules()
    {
        return [
            [['name', 'desc', 'img_url', 'big_img_url', 'advert_pic', 'advert_url', 'advert_open_params'], 'trim'],
            [['cx_mch_id', 'type', 'parent_id', 'sort', 'is_delete', 'created_at', 'updated_at', 'deleted_at', 'status', 'is_hide', 'advert_url_type'], 'integer'],
            [['name'], 'required'],
            [['name'], 'string', 'max' => 128],
            [['desc'], 'string', 'max' => 256],
            [['img_url', 'big_img_url', 'advert_pic', 'advert_url', 'advert_open_params'], 'string', 'max' => 2048],
        ];
    }

    /**
     * {@inheritdoc}
     */
    public function attributeLabels()
    {
        return [
            'id' => 'ID',
            'cx_mch_id' => '平台商户ID',
            'type' => '类型',
            'name' => '名称',
            'desc' => '描述',
            'img_url' => '图片',
            'parent_id' => '父ID',
            'sort' => '排序，默认100，升序',
            'is_delete' => '是否删除，0=否，1=是',
            'created_at' => '添加时间',
            'updated_at' => '更新时间',
            'deleted_at' => '删除时间',
            'status' => '是否启用，0=否，1=是',
            'is_hide' => '是否隐藏，0=否，1=是',
            'big_img_url' => '大图',
            'advert_pic' => '广告图',
            'advert_url' => '广告链接',
            'advert_url_type' => '广告链接类型',
            'advert_open_params' => '广告链接打开参数',
        ];
    }
    
        
    public function beforeSave($insert) {
        if(parent::beforeSave($insert)){
            if($this->isNewRecord){
                $this->created_at = time();
            }
            $this->updated_at = time();
            
            if($this->is_delete == 1)
                $this->deleted_at = time(); 
            $this->htmlTagFilter();
            return true;
        } else {
            return false;
        }
    }   
    
    public function htmlTagFilter()
    {
        $this->name = Model::htmlTagFilter($this->name);
        $this->desc = Model::htmlTagFilter($this->desc);
        $this->img_url = Model::htmlTagFilter($this->img_url);
        $this->big_img_url = Model::htmlTagFilter($this->big_img_url);
        $this->advert_pic = Model::htmlTagFilter($this->advert_pic);
        $this->advert_url = Model::htmlTagFilter($this->advert_url);
    }
    
    /**
     * 获取分类层次数组，可以默认获取整个分类树的数组，也可以获取指定父id的分类树数组
     * @param integer $parent
     * @return array
     * @throws 
     */
    public static function getTagTreeArray($parent = 0, $type = 0, $cx_mch_id = 0)
    {
        $parent = intval($parent);
        $topLevelTags = [];
        
        //首先确认数据是否已经获取，不需要重复获取数据
        if(count(self::$parentTags) == 0)
        {
            $allTags = Cat::find()->where(['cx_mch_id' => $cx_mch_id, 'type' => $type, 'is_delete' => 0])->select('id,type,name,desc,img_url,parent_id,sort,created_at,big_img_url,status,is_hide,advert_pic,advert_url,advert_url_type,advert_open_params')->orderBy(['sort' => SORT_ASC])->asArray()->all();
        
            //先把获取的全量数组按照parent为数组键值重新排列，使用引用的方式提高效率
            foreach(array_keys($allTags) as $key)
            {
                self::$parentTags[$allTags[$key]['parent_id']][] = &$allTags[$key];
            }
        }
        
        //从parent为键值的数组中获取带有层次信息的数组，$level为层级
        $level = 0;
        $result = self::getChildTags($parent, $level, $cx_mch_id);
        if(is_array($result))
            $topLevelTags = array_merge($topLevelTags, $result);
        return $topLevelTags;
    }
    
    /**
     * 获取某个父节点下面的所有子节点的数组
     * @param integer $parent
     * @param integer $level
     * @return array
     * @throws 
     */
    private static function getChildTags($parent = 0, $level = 0, $cx_mch_id = 0)
    {
        $list = [];
        if(!array_key_exists($parent, self::$parentTags))
            return null;
        foreach(self::$parentTags[$parent] as $tag)
        {
            $tag['level'] = $level;
            $list[] = $tag;
            
            //递归调用，直到获取所有的子节点
            $result = self::getChildTags($tag['id'], $level + 1);
            if(is_array($result))
                $list = array_merge($list, $result);
        }
        return $list;
    }           
}