<?php
/**
 * Created by PhpStorm.
 * User: Bear
 * Date: 2018/11/21
 * Time: 下午3:21
 */

namespace app\common\service;


use app\common\library\Redis;
use app\common\model\Book;
use app\common\model\ManageTitle;

class BookService
{
    /**
     * @var BookService
     */
    private static $self;

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

        return self::$self;
    }

    /**
     * @return Book
     */
    public function getBookModel()
    {
        return model('Book');
    }

    /**
     * @return ManageTitle
     */
    public function getManageTitleModel()
    {
        return model('ManageTitle');
    }

    /**
     * 批量更新书籍信息
     * @param $aUpdate
     * @param $bookIds
     * @return array
     */
    public function updateManyBookInfo($aUpdate, $bookIds)
    {
        try{
            $data = [
                'success' => 0,
                'invalid' => [],
            ];
            $ids = $this->getBookModel()
                ->whereIn('id', $bookIds)
                ->column('id');

            $data['invalid'] = array_diff($bookIds, $ids);

            if ($ids) {
                $list = $this->getBookModel()
                    ->whereIn('id', $bookIds)->select();
                foreach ($list as $item) {
                    $item->save($aUpdate);
                    $redisKey = 'B:'. $item['id'];
                    Redis::instance()->del($redisKey);
                }
                $data['success']++;
            }
            $msg = '';
            if ($data['invalid']) {
                $msg = '。无效书籍ID:：' . implode(',', $data['invalid']);
            }

            if ($data['success'] > 0) {
                return [
                    'code' => 0,
                    'msg'  => '更新成功' . $msg,
                ];
            } else {
                return [
                    'code' => 1,
                    'msg'  => '更新失败' . $msg,
                ];
            }
        } catch (\Exception $e) {
            return [
                'code' => $e->getCode(),
                'msg'  => $e->getMessage(),
            ];
        }
    }

    /**
     * 批量添加标题
     * @param $titles
     * @param $status
     * @param $sex
     * @return array
     */
    public function batchAddTitle($titles, $status, $sex)
    {
        try {
            $inserts = [];
            foreach ($titles as $title) {
                $inserts[] = [
                    'status' => $status,
                    'title'  => $title,
                    'sex'    => $sex,
                ];
            }
            $data = $this->getManageTitleModel()->saveAll($inserts);
            if ($data) {
                return [
                    'code' => 0,
                    'msg'  => '添加成功',
                ];
            } else {
                return [
                    'code' => 1,
                    'msg'  => '添加失败',
                ];
            }
        } catch (\Exception $e) {
            return [
                'code' => $e->getCode(),
                'msg'  => $e->getMessage(),
            ];
        }
    }
}