<?php


namespace backend\logic\file;

use common\models\ars\File;
use common\models\ars\TemFile;

class FileManager
{
    //数据表ats_file和ats_tem_file的类型字段type
    const TYPE_IMAGE = 1;//图片
    const TYPE_VIDEO = 2;//影视
    const TYPE_EXCEL = 3;//excel表单
    const TYPE_WORD = 4;//word文本
    const TYPE_TXT = 5;//txt文本

    public static $extension = [
        self::TYPE_IMAGE => ['jpg', 'png', 'jpeg'],
        self::TYPE_VIDEO => ['mp4'],
        self::TYPE_EXCEL => [],
        self::TYPE_WORD => ['docx'],
        self::TYPE_TXT => ['txt'],
    ];

    /**
     * @param $array
     * @param $keyword
     * @return bool|int|string
     * 根据文件拓展名在$extension中查找对应的文件类型，若不存在则返回false
     */
    public function searchType($array, $keyword){
        foreach($array as $key => $value){
            foreach ($value as $k => $v) {
                if($v == $keyword){
                    return $key;
                }
            }
        }
        return false;
    }

    /**
     * @param $imgIdStr
     * @param $ownId
     * @param $ownType
     * @return array
     * 根据临时文件id(字符串)将临时文件保存在文件中
     */
    public function saveTemFileToFile($temFIleIdStr, $ownId, $ownType)
    {
        if(!$temFIleIdStr || !$ownId) {
            return ['status' => false, 'info' => '参数错误'];
        }

        $img_id_arr = explode(',', $temFIleIdStr);
        $i = 1;
        $first_file_id = 0;
        foreach ($img_id_arr as $key => $value) {
            $tem_file = TemFile::findOne($value);

            if(!$tem_file) {
                return ['status' => false, 'info' => '存在查找不到的文件'];
            }

            $res = self::saveNewFile($tem_file, $ownId, $ownType);
            if(!$res['status']) {
                return ['status' => false, 'info' => '存在文件保存失败'];
            }
            if($i == 1) {
                $first_file_id = $res['file_id'];
            }

            $i++;
        }

        return ['status' => true, 'info' => '保存成功', 'first_file_id' => $first_file_id];
    }

    /**
     * @param $temFile
     * @param $ownId
     * @param $ownType
     * @return bool
     * 创建新的文件
     */
    private function saveNewFile($temFile, $ownId, $ownType)
    {
        $new_file = new File();
        $new_file->name = $temFile->name;
        $new_file->type = $temFile->type;
        $new_file->own_id = $ownId;
        $new_file->own_type = $ownType;
        $new_file->alias = $temFile->alias;
        $new_file->path = $temFile->path;
        if($new_file->save()) {
            return ['status' => true, 'file_id' => $new_file->id];
        } else {
            return ['status' => false];
        }
    }
}