/*
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* Copyright [2020-2030] [https://www.stylefeng.cn]
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Guns采用APACHE LICENSE 2.0开源协议，您在使用过程中，需要注意以下几点：
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*
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* 1.请不要删除和修改根目录下的LICENSE文件。
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* 2.请不要删除和修改Guns源码头部的版权声明。
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* 3.请保留源码和相关描述文件的项目出处，作者声明等。
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* 4.分发源码时候，请注明软件出处 https://gitee.com/stylefeng/guns
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* 5.在修改包名，模块名称，项目代码等时，请注明软件出处 https://gitee.com/stylefeng/guns
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*/
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package cn.stylefeng.roses.kernel.mongodb.file.service.impl;
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import cn.hutool.core.io.IoUtil;
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import cn.hutool.core.util.IdUtil;
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import cn.stylefeng.roses.kernel.auth.api.context.LoginContext;
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import cn.stylefeng.roses.kernel.auth.api.pojo.login.LoginUser;
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import cn.stylefeng.roses.kernel.db.api.factory.PageResultFactory;
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import cn.stylefeng.roses.kernel.db.api.pojo.page.PageResult;
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import cn.stylefeng.roses.kernel.mongodb.api.MongoFileApi;
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import cn.stylefeng.roses.kernel.mongodb.file.entity.MongoFileEntity;
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import cn.stylefeng.roses.kernel.mongodb.file.mapper.MongoFileMapper;
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import cn.stylefeng.roses.kernel.mongodb.file.service.MongoFileService;
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import com.mongodb.client.gridfs.GridFSBucket;
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import com.mongodb.client.gridfs.GridFSDownloadStream;
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import com.mongodb.client.gridfs.model.GridFSFile;
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import lombok.extern.slf4j.Slf4j;
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import org.bson.types.ObjectId;
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import org.springframework.data.domain.*;
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import org.springframework.data.mongodb.core.query.Criteria;
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import org.springframework.data.mongodb.core.query.Query;
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import org.springframework.data.mongodb.gridfs.GridFsResource;
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import org.springframework.data.mongodb.gridfs.GridFsTemplate;
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import org.springframework.stereotype.Service;
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import org.springframework.web.multipart.MultipartFile;
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import javax.annotation.Resource;
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import java.io.IOException;
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import java.util.Date;
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import java.util.Optional;
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/**
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* Mongodb 文件存储实现类
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*
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* @author huziyang
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* @date 2021/03/26 17:29
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*/
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@Slf4j
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@Service
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public class MongoFileServiceImpl implements MongoFileService, MongoFileApi<MongoFileEntity, String> {
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@Resource
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private MongoFileMapper mongoFileMapper;
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@Resource
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private GridFsTemplate gridFsTemplate;
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@Resource
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private GridFSBucket gridFSBucket;
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@Override
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public MongoFileEntity saveFile(MultipartFile file) {
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MongoFileEntity fileDocument = new MongoFileEntity();
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fileDocument.setName(file.getOriginalFilename());
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fileDocument.setUploadDate(new Date());
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try {
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// 填充登录用户的userId
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LoginUser loginUser = LoginContext.me().getLoginUser();
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fileDocument.setUploadUserId(loginUser.getUserId());
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} catch (Exception e) {
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// 获取不到用户登录信息，就不填充
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}
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fileDocument.setSuffix(file.getOriginalFilename().substring(file.getOriginalFilename().lastIndexOf(".")));
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try {
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ObjectId store = gridFsTemplate.store(file.getInputStream(), IdUtil.simpleUUID(), file.getContentType());
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fileDocument.setGridfsId(String.valueOf(store));
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return mongoFileMapper.save(fileDocument);
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} catch (IOException ex) {
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log.error(ex.getMessage());
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}
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return fileDocument;
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}
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@Override
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public void removeFile(String id) {
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Optional<MongoFileEntity> fileDocumentOptional = mongoFileMapper.findById(id);
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if (fileDocumentOptional.isPresent()) {
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mongoFileMapper.deleteById(id);
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gridFsTemplate.delete(new Query().addCriteria(Criteria.where("_id").is(fileDocumentOptional.get().getGridfsId())));
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}
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}
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@Override
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public Optional<MongoFileEntity> getFileById(String id) {
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Optional<MongoFileEntity> fileDocumentOptional = mongoFileMapper.findById(id);
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if (fileDocumentOptional.isPresent()) {
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MongoFileEntity fileDocument = fileDocumentOptional.get();
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Query gridQuery = new Query().addCriteria(Criteria.where("_id").is(fileDocument.getGridfsId()));
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GridFSFile fsFile = gridFsTemplate.findOne(gridQuery);
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GridFSDownloadStream in = gridFSBucket.openDownloadStream(fsFile.getObjectId());
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try {
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if (in.getGridFSFile().getLength() > 0) {
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GridFsResource resource = new GridFsResource(fsFile, in);
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fileDocument.setContent(IoUtil.readBytes(resource.getInputStream()));
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return Optional.of(fileDocument);
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} else {
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return Optional.empty();
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}
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} catch (IOException e) {
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log.error(e.getMessage());
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}
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}
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return Optional.empty();
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}
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@Override
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public PageResult<MongoFileEntity> getFilesByPage(MongoFileEntity fileDocument) {
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Integer pageIndex = fileDocument.getPageNo();
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Integer pageSize = fileDocument.getPageSize();
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Sort sort = Sort.by(Sort.Direction.DESC, "uploadDate");
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PageRequest pageRequest = PageRequest.of(pageIndex - 1, pageSize, sort);
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Example<MongoFileEntity> example = Example.of(fileDocument, ExampleMatcher.matching()
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.withIgnoreCase(true)
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.withIgnorePaths("_class", "pageSize", "pageNo", "content")
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);
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Page<MongoFileEntity> all = mongoFileMapper.findAll(example, pageRequest);
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return PageResultFactory.createPageResult(all.getContent(), mongoFileMapper.count(example), pageSize, pageIndex);
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}
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}
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