<?php


namespace app\admin\logic;

use app\common\model\SystemFaq;
use app\admin\model\dao\SystemFaq as SystemFaqDao;
use think\facade\Cache;

class SystemFaqLogic
{

    private static $CACHE_ID_KEY = "cache:system_faq:id:";

    private static $CACHE_LIST_KEY = "cache:system_faq:list";


    public static function getList($page, $limit, $where, $sort)
    {
        $count = (new SystemFaq())
            ->where($where)
            ->count();
        $list  = (new SystemFaq())
            ->where($where)
            ->page($page, $limit)
            ->order($sort)
            ->select();
        foreach ($list as &$v) {
            if ($v->parent_id == 0) {
                $v->parent_id = '最上级';
            } else {
                $self         = SystemFaqLogic::getTitleById($v->parent_id);
                $v->parent_id = $self;
            }
        }
        return [$count, $list];
    }

    private static function getTitleById($parent_id)
    {
        $key = self::$CACHE_ID_KEY . $parent_id;
        if (Cache::has($key)) {
            return Cache::get($key);
        }
        $name = SystemFaqDao::getTitleById($parent_id);
        Cache::set($key, $name, 10 * 60);
        return $name;
    }

    public static function delTitleCache($parent_id)
    {
        $key = self::$CACHE_ID_KEY . $parent_id;
        Cache::delete($key);
    }

    public static function getTopList()
    {
        $key = self::$CACHE_LIST_KEY;
        if (Cache::has($key)) {
            return Cache::get($key);
        }
        $list = SystemFaqDao::getTopArrList();
        array_push($list, ['id' => 0, 'title' => '最上级']);

        Cache::set($key, $list, 10 * 60);
        return $list;
    }


    public static function delCache()
    {
        $key = self::$CACHE_LIST_KEY;
        Cache::delete($key);
    }


}