book_admin/application/common/service/ResourceService.php

<?php
/**
 * Created by PhpStorm.
 * User: Bear
 * Date: 2019/1/22
 * Time: 下午5:52
 */

namespace app\common\service;

use app\common\model\ManageCover;
use app\common\model\ManageShareimg;
use app\common\model\ManageSharetitle;
use app\common\model\object\ReturnObject;

/**
 * Class ResourceService
 * @package app\common\service
 */
class ResourceService extends BaseService
{
    /**
     * @var ResourceService
     */
    private static $self;

    /**
     * @return $this|ResourceService
     */
    public static function instance()
    {
        if (self::$self == NULL) {
            self::$self = new self();
        }

        return self::$self;
    }

    /**
     * @return ManageSharetitle
     */
    public function getManageShareTitleModel()
    {
        return model('ManageSharetitle');
    }

    /**
     * @return ManageSharedesc
     */
    public function getManageShareDescModel()
    {
        return model('ManageSharedesc');
    }

    /**
     * @return ManageShareimg
     */
    public function getManageShareImageModel()
    {
        return model('ManageShareimg');
    }

    /**
     * @return ManageCover
     */
    public function getManageCoverModel()
    {
        return model('ManageCover');
    }

    /**
     * 随机获取一张小图
     * @return ReturnObject
     */
    public function getRandomImage()
    {
        $max = $this->getManageShareImageModel()->where('type', '=', '2')->count();
        $rand = rand(0, $max - 1);
        $rand = $rand < 0 ? 0 : $rand;
        $randOne = $this->getManageShareImageModel()
            ->where('type', '=', '2')
            ->limit($rand, 1)
            ->select();
        if ($randOne) {
            $randOne = array_pop($randOne);
            return $this->setData($randOne->getData('image'))->getReturn();
        } else {
            return $this->setData('')->getReturn();
        }
    }

    /**
     * 随机获取一张标题
     * @return ReturnObject
     */
    public function getRandomTitle()
    {
        $max = $this->getManageShareTitleModel()->count();
        $rand = rand(0, $max - 1);
        $rand = $rand < 0 ? 0 : $rand;
        $randOne = $this->getManageShareTitleModel()
            ->limit($rand, 1)
            ->select();

        if ($randOne) {
            $randOne = array_pop($randOne);
            return $this->setData($randOne->getData('title'))->getReturn();
        } else {
            return $this->setData('')->getReturn();
        }
    }

    /**
     * 随机获取一张大图
     * @return ReturnObject
     */
    public function getRandomCover()
    {
        $max = $this->getManageShareImageModel()->where('type', '=', '1')->count();
        $rand = rand(0, $max - 1);
        $rand = $rand < 0 ? 0 : $rand;
        $randOne = $this->getManageShareImageModel()
            ->where('type', '=', '1')
            ->limit($rand, 1)
            ->select();
        if ($randOne) {
            $randOne = array_pop($randOne);
            return $this->setData($randOne->getData('image'))->getReturn();
        } else {
            return $this->setData('')->getReturn();
        }
    }

    /**
     * 随机获取一个分享内容
     * @return ReturnObject
     */
    public function getRandomDesc()
    {
        $where = ['status'=>'normal'];
        $max = $this->getManageShareDescModel()->where($where) -> count();
        $rand = rand(0, $max - 1);
        $rand = $rand < 0 ? 0 : $rand;
        $randOne = $this->getManageShareDescModel()
            ->where($where)
            ->limit($rand, 1)
            ->select();

        if ($randOne) {
            $randOne = array_pop($randOne);
            return $this->setData($randOne->getData('desc'))->getReturn();
        } else {
            return $this->setData('')->getReturn();
        }
    }
}