package com.dl.generator.service;
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import cn.hutool.core.collection.CollUtil;
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import cn.hutool.core.io.IoUtil;
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import cn.hutool.core.lang.Dict;
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import cn.hutool.core.util.ObjectUtil;
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import com.baomidou.dynamic.datasource.annotation.DS;
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import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
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import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
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import com.baomidou.mybatisplus.core.incrementer.IdentifierGenerator;
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import com.baomidou.mybatisplus.core.toolkit.Wrappers;
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import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
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import com.dl.common.constant.Constants;
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import com.dl.common.constant.GenConstants;
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import com.dl.common.core.domain.PageQuery;
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import com.dl.common.core.page.TableDataInfo;
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import com.dl.common.exception.ServiceException;
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import com.dl.common.helper.LoginHelper;
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import com.dl.common.utils.JsonUtils;
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import com.dl.common.utils.StreamUtils;
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import com.dl.common.utils.StringUtils;
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import com.dl.common.utils.file.FileUtils;
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import com.dl.generator.domain.GenTable;
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import com.dl.generator.domain.GenTableColumn;
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import com.dl.generator.mapper.GenTableColumnMapper;
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import com.dl.generator.mapper.GenTableMapper;
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import com.dl.generator.util.GenUtils;
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import com.dl.generator.util.VelocityInitializer;
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import com.dl.generator.util.VelocityUtils;
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import lombok.RequiredArgsConstructor;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.velocity.Template;
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import org.apache.velocity.VelocityContext;
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import org.apache.velocity.app.Velocity;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.IOException;
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import java.io.StringWriter;
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import java.nio.charset.StandardCharsets;
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import java.util.*;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipOutputStream;
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/**
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* 业务 服务层实现
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*
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* @author Lion Li
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*/
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@DS("#header.datasource")
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@Slf4j
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@RequiredArgsConstructor
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@Service
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public class GenTableServiceImpl implements IGenTableService {
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private final GenTableMapper baseMapper;
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private final GenTableColumnMapper genTableColumnMapper;
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private final IdentifierGenerator identifierGenerator;
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/**
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* 查询业务字段列表
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*
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* @param tableId 业务字段编号
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* @return 业务字段集合
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*/
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@Override
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public List<GenTableColumn> selectGenTableColumnListByTableId(Long tableId) {
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return genTableColumnMapper.selectList(new LambdaQueryWrapper<GenTableColumn>()
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.eq(GenTableColumn::getTableId, tableId)
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.orderByAsc(GenTableColumn::getSort));
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}
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/**
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* 查询业务信息
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*
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* @param id 业务ID
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* @return 业务信息
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*/
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@Override
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public GenTable selectGenTableById(Long id) {
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GenTable genTable = baseMapper.selectGenTableById(id);
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setTableFromOptions(genTable);
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return genTable;
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}
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@Override
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public TableDataInfo<GenTable> selectPageGenTableList(GenTable genTable, PageQuery pageQuery) {
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Page<GenTable> page = baseMapper.selectPage(pageQuery.build(), this.buildGenTableQueryWrapper(genTable));
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return TableDataInfo.build(page);
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}
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private QueryWrapper<GenTable> buildGenTableQueryWrapper(GenTable genTable) {
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Map<String, Object> params = genTable.getParams();
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QueryWrapper<GenTable> wrapper = Wrappers.query();
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wrapper.like(StringUtils.isNotBlank(genTable.getTableName()), "lower(table_name)", StringUtils.lowerCase(genTable.getTableName()))
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.like(StringUtils.isNotBlank(genTable.getTableComment()), "lower(table_comment)", StringUtils.lowerCase(genTable.getTableComment()))
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.between(params.get("beginTime") != null && params.get("endTime") != null,
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"create_time", params.get("beginTime"), params.get("endTime"));
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return wrapper;
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}
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@Override
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public TableDataInfo<GenTable> selectPageDbTableList(GenTable genTable, PageQuery pageQuery) {
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Page<GenTable> page = baseMapper.selectPageDbTableList(pageQuery.build(), genTable);
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return TableDataInfo.build(page);
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}
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/**
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* 查询据库列表
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*
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* @param tableNames 表名称组
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* @return 数据库表集合
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*/
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@Override
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public List<GenTable> selectDbTableListByNames(String[] tableNames) {
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return baseMapper.selectDbTableListByNames(tableNames);
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}
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/**
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* 查询所有表信息
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*
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* @return 表信息集合
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*/
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@Override
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public List<GenTable> selectGenTableAll() {
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return baseMapper.selectGenTableAll();
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}
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/**
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* 修改业务
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*
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* @param genTable 业务信息
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* @return 结果
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*/
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@Transactional(rollbackFor = Exception.class)
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@Override
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public void updateGenTable(GenTable genTable) {
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String options = JsonUtils.toJsonString(genTable.getParams());
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genTable.setOptions(options);
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int row = baseMapper.updateById(genTable);
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if (row > 0) {
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for (GenTableColumn cenTableColumn : genTable.getColumns()) {
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genTableColumnMapper.updateById(cenTableColumn);
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}
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}
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}
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/**
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* 删除业务对象
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*
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* @param tableIds 需要删除的数据ID
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* @return 结果
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*/
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@Transactional(rollbackFor = Exception.class)
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@Override
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public void deleteGenTableByIds(Long[] tableIds) {
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List<Long> ids = Arrays.asList(tableIds);
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baseMapper.deleteBatchIds(ids);
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genTableColumnMapper.delete(new LambdaQueryWrapper<GenTableColumn>().in(GenTableColumn::getTableId, ids));
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}
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/**
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* 导入表结构
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*
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* @param tableList 导入表列表
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*/
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@Transactional(rollbackFor = Exception.class)
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@Override
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public void importGenTable(List<GenTable> tableList) {
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String operName = LoginHelper.getUsername();
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try {
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for (GenTable table : tableList) {
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String tableName = table.getTableName();
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GenUtils.initTable(table, operName);
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int row = baseMapper.insert(table);
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if (row > 0) {
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// 保存列信息
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List<GenTableColumn> genTableColumns = genTableColumnMapper.selectDbTableColumnsByName(tableName);
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List<GenTableColumn> saveColumns = new ArrayList<>();
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for (GenTableColumn column : genTableColumns) {
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GenUtils.initColumnField(column, table);
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saveColumns.add(column);
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}
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if (CollUtil.isNotEmpty(saveColumns)) {
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genTableColumnMapper.insertBatch(saveColumns);
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}
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}
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}
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} catch (Exception e) {
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throw new ServiceException("导入失败：" + e.getMessage());
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}
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}
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/**
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* 预览代码
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*
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* @param tableId 表编号
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* @return 预览数据列表
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*/
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@Override
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public Map<String, String> previewCode(Long tableId) {
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Map<String, String> dataMap = new LinkedHashMap<>();
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// 查询表信息
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GenTable table = baseMapper.selectGenTableById(tableId);
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List<Long> menuIds = new ArrayList<>();
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for (int i = 0; i < 6; i++) {
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menuIds.add(identifierGenerator.nextId(null).longValue());
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}
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table.setMenuIds(menuIds);
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// 设置主子表信息
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setSubTable(table);
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// 设置主键列信息
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setPkColumn(table);
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VelocityInitializer.initVelocity();
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VelocityContext context = VelocityUtils.prepareContext(table);
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// 获取模板列表
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List<String> templates = VelocityUtils.getTemplateList(table.getTplCategory());
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for (String template : templates) {
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// 渲染模板
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StringWriter sw = new StringWriter();
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Template tpl = Velocity.getTemplate(template, Constants.UTF8);
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tpl.merge(context, sw);
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dataMap.put(template, sw.toString());
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}
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return dataMap;
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}
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/**
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* 生成代码（下载方式）
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*
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* @param tableName 表名称
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* @return 数据
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*/
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@Override
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public byte[] downloadCode(String tableName) {
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ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
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ZipOutputStream zip = new ZipOutputStream(outputStream);
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generatorCode(tableName, zip);
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IoUtil.close(zip);
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return outputStream.toByteArray();
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}
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/**
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* 生成代码（自定义路径）
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*
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* @param tableName 表名称
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*/
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@Override
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public void generatorCode(String tableName) {
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// 查询表信息
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GenTable table = baseMapper.selectGenTableByName(tableName);
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// 设置主子表信息
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setSubTable(table);
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// 设置主键列信息
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setPkColumn(table);
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VelocityInitializer.initVelocity();
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VelocityContext context = VelocityUtils.prepareContext(table);
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// 获取模板列表
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List<String> templates = VelocityUtils.getTemplateList(table.getTplCategory());
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for (String template : templates) {
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if (!StringUtils.containsAny(template, "sql.vm", "api.js.vm", "index.vue.vm", "index-tree.vue.vm")) {
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// 渲染模板
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StringWriter sw = new StringWriter();
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Template tpl = Velocity.getTemplate(template, Constants.UTF8);
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tpl.merge(context, sw);
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try {
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String path = getGenPath(table, template);
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FileUtils.writeUtf8String(sw.toString(), path);
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} catch (Exception e) {
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throw new ServiceException("渲染模板失败，表名：" + table.getTableName());
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}
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}
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}
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}
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/**
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* 同步数据库
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*
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* @param tableName 表名称
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*/
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@Transactional(rollbackFor = Exception.class)
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@Override
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public void synchDb(String tableName) {
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GenTable table = baseMapper.selectGenTableByName(tableName);
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List<GenTableColumn> tableColumns = table.getColumns();
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Map<String, GenTableColumn> tableColumnMap = StreamUtils.toIdentityMap(tableColumns, GenTableColumn::getColumnName);
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List<GenTableColumn> dbTableColumns = genTableColumnMapper.selectDbTableColumnsByName(tableName);
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if (CollUtil.isEmpty(dbTableColumns)) {
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throw new ServiceException("同步数据失败，原表结构不存在");
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}
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List<String> dbTableColumnNames = StreamUtils.toList(dbTableColumns, GenTableColumn::getColumnName);
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List<GenTableColumn> saveColumns = new ArrayList<>();
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dbTableColumns.forEach(column -> {
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GenUtils.initColumnField(column, table);
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if (tableColumnMap.containsKey(column.getColumnName())) {
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GenTableColumn prevColumn = tableColumnMap.get(column.getColumnName());
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column.setColumnId(prevColumn.getColumnId());
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if (column.isList()) {
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// 如果是列表，继续保留查询方式/字典类型选项
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column.setDictType(prevColumn.getDictType());
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column.setQueryType(prevColumn.getQueryType());
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}
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if (StringUtils.isNotEmpty(prevColumn.getIsRequired()) && !column.isPk()
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&& (column.isInsert() || column.isEdit())
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&& ((column.isUsableColumn()) || (!column.isSuperColumn()))) {
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// 如果是(新增/修改&非主键/非忽略及父属性)，继续保留必填/显示类型选项
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column.setIsRequired(prevColumn.getIsRequired());
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column.setHtmlType(prevColumn.getHtmlType());
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}
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}
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saveColumns.add(column);
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});
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if (CollUtil.isNotEmpty(saveColumns)) {
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genTableColumnMapper.insertOrUpdateBatch(saveColumns);
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}
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List<GenTableColumn> delColumns = StreamUtils.filter(tableColumns, column -> !dbTableColumnNames.contains(column.getColumnName()));
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if (CollUtil.isNotEmpty(delColumns)) {
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List<Long> ids = StreamUtils.toList(delColumns, GenTableColumn::getColumnId);
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genTableColumnMapper.deleteBatchIds(ids);
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}
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}
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/**
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* 批量生成代码（下载方式）
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*
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* @param tableNames 表数组
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* @return 数据
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*/
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@Override
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public byte[] downloadCode(String[] tableNames) {
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ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
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ZipOutputStream zip = new ZipOutputStream(outputStream);
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for (String tableName : tableNames) {
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generatorCode(tableName, zip);
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}
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IoUtil.close(zip);
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return outputStream.toByteArray();
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}
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/**
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* 查询表信息并生成代码
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*/
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private void generatorCode(String tableName, ZipOutputStream zip) {
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// 查询表信息
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GenTable table = baseMapper.selectGenTableByName(tableName);
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List<Long> menuIds = new ArrayList<>();
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for (int i = 0; i < 6; i++) {
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menuIds.add(identifierGenerator.nextId(null).longValue());
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}
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table.setMenuIds(menuIds);
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// 设置主子表信息
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setSubTable(table);
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// 设置主键列信息
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setPkColumn(table);
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VelocityInitializer.initVelocity();
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VelocityContext context = VelocityUtils.prepareContext(table);
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// 获取模板列表
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List<String> templates = VelocityUtils.getTemplateList(table.getTplCategory());
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for (String template : templates) {
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// 渲染模板
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StringWriter sw = new StringWriter();
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Template tpl = Velocity.getTemplate(template, Constants.UTF8);
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tpl.merge(context, sw);
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try {
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// 添加到zip
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zip.putNextEntry(new ZipEntry(VelocityUtils.getFileName(template, table)));
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IoUtil.write(zip, StandardCharsets.UTF_8, false, sw.toString());
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IoUtil.close(sw);
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zip.flush();
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zip.closeEntry();
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} catch (IOException e) {
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log.error("渲染模板失败，表名：" + table.getTableName(), e);
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}
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}
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}
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/**
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* 修改保存参数校验
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*
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* @param genTable 业务信息
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*/
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@Override
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public void validateEdit(GenTable genTable) {
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if (GenConstants.TPL_TREE.equals(genTable.getTplCategory())) {
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String options = JsonUtils.toJsonString(genTable.getParams());
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Dict paramsObj = JsonUtils.parseMap(options);
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if (StringUtils.isEmpty(paramsObj.getStr(GenConstants.TREE_CODE))) {
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throw new ServiceException("树编码字段不能为空");
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} else if (StringUtils.isEmpty(paramsObj.getStr(GenConstants.TREE_PARENT_CODE))) {
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throw new ServiceException("树父编码字段不能为空");
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} else if (StringUtils.isEmpty(paramsObj.getStr(GenConstants.TREE_NAME))) {
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throw new ServiceException("树名称字段不能为空");
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} else if (GenConstants.TPL_SUB.equals(genTable.getTplCategory())) {
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if (StringUtils.isEmpty(genTable.getSubTableName())) {
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throw new ServiceException("关联子表的表名不能为空");
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} else if (StringUtils.isEmpty(genTable.getSubTableFkName())) {
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throw new ServiceException("子表关联的外键名不能为空");
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}
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}
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}
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}
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/**
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* 设置主键列信息
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*
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* @param table 业务表信息
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*/
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public void setPkColumn(GenTable table) {
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for (GenTableColumn column : table.getColumns()) {
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if (column.isPk()) {
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table.setPkColumn(column);
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break;
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}
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}
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if (ObjectUtil.isNull(table.getPkColumn())) {
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table.setPkColumn(table.getColumns().get(0));
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}
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if (GenConstants.TPL_SUB.equals(table.getTplCategory())) {
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for (GenTableColumn column : table.getSubTable().getColumns()) {
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if (column.isPk()) {
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table.getSubTable().setPkColumn(column);
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break;
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}
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}
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if (ObjectUtil.isNull(table.getSubTable().getPkColumn())) {
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table.getSubTable().setPkColumn(table.getSubTable().getColumns().get(0));
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}
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}
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}
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/**
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* 设置主子表信息
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*
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* @param table 业务表信息
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*/
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public void setSubTable(GenTable table) {
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String subTableName = table.getSubTableName();
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if (StringUtils.isNotEmpty(subTableName)) {
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table.setSubTable(baseMapper.selectGenTableByName(subTableName));
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}
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}
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/**
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* 设置代码生成其他选项值
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*
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* @param genTable 设置后的生成对象
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*/
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public void setTableFromOptions(GenTable genTable) {
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Dict paramsObj = JsonUtils.parseMap(genTable.getOptions());
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if (ObjectUtil.isNotNull(paramsObj)) {
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String treeCode = paramsObj.getStr(GenConstants.TREE_CODE);
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String treeParentCode = paramsObj.getStr(GenConstants.TREE_PARENT_CODE);
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String treeName = paramsObj.getStr(GenConstants.TREE_NAME);
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String parentMenuId = paramsObj.getStr(GenConstants.PARENT_MENU_ID);
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String parentMenuName = paramsObj.getStr(GenConstants.PARENT_MENU_NAME);
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genTable.setTreeCode(treeCode);
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genTable.setTreeParentCode(treeParentCode);
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genTable.setTreeName(treeName);
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genTable.setParentMenuId(parentMenuId);
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genTable.setParentMenuName(parentMenuName);
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}
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}
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/**
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* 获取代码生成地址
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*
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* @param table 业务表信息
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* @param template 模板文件路径
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* @return 生成地址
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*/
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public static String getGenPath(GenTable table, String template) {
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String genPath = table.getGenPath();
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if (StringUtils.equals(genPath, "/")) {
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return System.getProperty("user.dir") + File.separator + "src" + File.separator + VelocityUtils.getFileName(template, table);
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}
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return genPath + File.separator + VelocityUtils.getFileName(template, table);
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}
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}
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