package com.flow.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;

import java.io.File;
import java.io.IOException;
import java.util.UUID;

public class FileUtil {
    private static final Logger log = LoggerFactory.getLogger(FileUtil.class);


    public static File upload(MultipartFile file, String filePath) {
        // 日期字符串
        String format = UUID.randomUUID().toString();
        // 文件名称
        String fileName = file.getOriginalFilename();
        try {
            // 路径
            String path = String.format("%s%s__%s", filePath, format, fileName);
            File dest = new File(path).getCanonicalFile();
            // 检测是否存在目录
            if (!dest.getParentFile().exists()) {
                // 创建目录
                if (!dest.getParentFile().mkdirs()) {
                    log.error("创建目录失败: {}", dest.getParentFile().getPath());
                }
            }
            // 文件写入
            file.transferTo(dest);
            return dest;
        } catch (Exception e) {
            log.error(e.getMessage(), e);
        }
        return null;
    }

    public static void del(String filePath) {
        if (filePath != null && filePath.length() > 0) {
            File file = new File(filePath);
            if (file.exists()) {
                file.delete();
            }
        }
    }

    public static String getSuffix(String fileName) {
        return fileName.substring(fileName.lastIndexOf("."));
    }

}