<?php
/**

 */

namespace Modules\ContentManage\Services\Books;

use Modules\ContentManage\Models\BookChapterContents;
use Modules\ContentManage\Models\BookChapters;

class ChapterService{


    /**
     * 解析导入的文件，可以从中间章节导入，但是比空虚连续，比如可以从第5章导入$start_sequence=5，可以支持覆盖导入
     * 比如如果之前导入的第10-20章有问题，可以重新导入第10-20章，此时$start_sequence=10，会覆盖之前第10-20章的内容
     * @param [int] $bid 
     * @param [itn] $start_sequence   开始序号，可以支持
     * @param [int] $vip_start        vip起始章节
     * @param [string] $path          文件目录  
     * @return void
     */
    public static function createChapterFromFile($bid,$start_sequence,$vip_start,$path){
        if( !file_exists($path)){
            return ;
        }
        $handle = fopen($path, "r");
        $i = $start_sequence;
        $content = '';
        $last_name = '';
        $last_chapter = '';
        $size = 0;
        $first_cid = 0;
        $last_cid = 0;
        //一行行读入文件，如果当前行是以###开头，则表示此行是章节标题，直到读到下一个标题，两个标题中间的内容就是正文
        while (($buffer = fgets($handle)) !== false) {
            $buffer = trim($buffer);
            $buffer = trim($buffer,'　');
            $buffer = preg_replace('/\s+/','',$buffer);
            if (!$buffer) continue;
            $temp =$buffer;
            //解析标题
            if($name = self::parseName($temp)){
                if(!$last_name){
                    //第一行直接过
                    $last_name = $name;
                }else{
                    //第二行，中间的部分是内容，此时可以保存数据库
                    $is_vip = $i >= $vip_start? 1:0;
                    $size += mb_strlen($content);
                    $cid = self::createOrUpdateContent($bid,$i,$last_name,$content,$is_vip);
                    if($i  == $start_sequence){
                        $first_cid = $cid;
                    }
                    $i++;$content = '';
                    $last_name = $name;
                }
            }else{
                $content .= $temp."\r\n";
            }
        }
        //当前是最后一张
        $is_vip = $i >= $vip_start? 1:0;
        $last_cid = self::createOrUpdateContent($bid,$i,$last_name,$content,$is_vip);
        $last_chapter = $last_name;
        $size += mb_strlen($content);
        fclose($handle);
        return ['size'=>$size,'chapter_count'=>$i,'first_cid'=>$first_cid,'last_cid'=>$last_cid,'last_chapter'=>$last_chapter];
    }

    /**
     * 保存章节，支持覆盖
     *
     * @param [type] $bid
     * @param [type] $sequence
     * @param [type] $name
     * @param [type] $content
     * @param [type] $is_vip
     * @return void
     */
    private static function createOrUpdateContent($bid,$sequence,$name,$content,$is_vip){
        $name = mb_convert_encoding($name,'UTF-8');
        $content = mb_convert_encoding($content,'UTF-8');
        $chapter_info = BookChapters::where('bid',$bid)->where('sequence',$sequence)->first();
        if($chapter_info){
            $content_info = BookChapterContents::where('id',$chapter_info->chapter_content_id)->first();
            if($content_info){
                $content_info->chapter_name = $name;
                $content_info->content = $content;
                $content_info->save();
            }else{
                $content_info = BookChapterContents::create(['bid'=>$bid,'chapter_name'=>$name,'content'=>$content]);
            }
            $chapter_info->name = $name;
            $chapter_info->size = mb_strlen($content);
            $chapter_info->chapter_content_id = $content_info->id;
            $chapter_info->save();
        }else{
            $content_info =  BookChapterContents::create(['bid'=>$bid,'chapter_name'=>$name,'content'=>$content]);
            $chapter_info = BookChapters::create([
                'bid'=>$bid,'name'=>$name,'sequence'=>$sequence,'size'=>mb_strlen($content),
                'is_vip'=>$is_vip,'prev_cid'=>0,'next_cid'=>0,'chapter_content_id'=>$content_info->id
            ]);
        }
        return $chapter_info->id;
    }


    /**
     * 解析章节标题
     *
     * @param [type] $content
     * @return void
     */
    private static function parseName($content){
        if(stripos($content,'###') !== false){
            return str_replace('###','',$content);
        }
        /*
        $status = preg_match('/^第.*?章/',$content);
        if($status){
            return  $content;
        }*/
        return '';
    }

}