<?php

namespace App\Modules\Book\Services;

use App\Modules\Book\BookConfig;
use App\Modules\Book\Book;
use Redis;
use DB;

class BookConfigService
{

    /**
     * 根据id获取图书
     * @param $bid
     * @return mixed
     */
    public static function getBookById($bid)
    {
        $res = BookConfig::getBookById($bid);
        return $res;
    }


    /**
     * 根据bid数组获取多本图书
     * @param $where
     * @param null $order
     * @return mixed
     */
    public static function getBooksByIds(array $where, $order = [],$is_on_shelf = '')
    {
        if(empty($where)){
            return (object)array();
        }
        if ($order)
            $res = BookConfig::getBooksByIds($where, $order,$is_on_shelf);
        else
            $res = BookConfig::getBooksByIds($where,$order,$is_on_shelf);
        return $res;
    }
    
    
    //阅读记录用到的图书信息 bid cover last_chapter
    public static function getBookSimpleInfoFroReadRecord(array $bid){
        return  BookConfig::join('books', 'book_configs.bid', '=', 'books.id')
            ->leftjoin('book_categories', 'books.category_id', 'book_categories.id')
            ->select('book_configs.bid', 'book_configs.cover', 'book_configs.book_name', 'books.chapter_count','books.last_chapter','book_categories.channel_name')
            ->whereIn('book_configs.bid', $bid)
            ->get();
    }


    public static function getBookSimpleInfoByBidAndFields($bid,$field){
        return  BookConfig::join('books', 'book_configs.bid', '=', 'books.id')
            ->leftjoin('book_categories', 'books.category_id', 'book_categories.id')
            ->select($field)
            ->where('book_configs.bid', $bid)
            ->first();
    }

    /**
     *
     * 根据条件获取图书
     * @param array $where ['key'=>'根据关键词查询','category_id'=>'根据分类id查询','is_on_shelf'=>上下架查询,'channel_name'=>'频道查询(男频女频)']
     * @param array $order 排序 默认是bid排序
     * @param int $page_size
     * @return mixed
     */
    public static function getBooks(array $where, array $order = [], $page_size = 15)
    {
        return BookConfig::getBooks($where, $order, $page_size);
    }


}