package com.iailab.module.infra.service.codegen;
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import cn.hutool.core.collection.CollUtil;
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import cn.hutool.core.util.StrUtil;
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import com.iailab.framework.common.pojo.PageResult;
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import com.iailab.framework.common.util.object.BeanUtils;
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import com.iailab.module.infra.controller.admin.codegen.vo.CodegenCreateListReqVO;
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import com.iailab.module.infra.controller.admin.codegen.vo.CodegenUpdateReqVO;
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import com.iailab.module.infra.controller.admin.codegen.vo.table.CodegenTablePageReqVO;
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import com.iailab.module.infra.controller.admin.codegen.vo.table.DatabaseTableRespVO;
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import com.iailab.module.infra.dal.dataobject.codegen.CodegenColumnDO;
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import com.iailab.module.infra.dal.dataobject.codegen.CodegenTableDO;
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import com.iailab.module.infra.dal.mysql.codegen.CodegenColumnMapper;
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import com.iailab.module.infra.dal.mysql.codegen.CodegenTableMapper;
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import com.iailab.module.infra.enums.codegen.CodegenSceneEnum;
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import com.iailab.module.infra.enums.codegen.CodegenTemplateTypeEnum;
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import com.iailab.module.infra.framework.codegen.config.CodegenProperties;
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import com.iailab.module.infra.service.codegen.inner.CodegenBuilder;
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import com.iailab.module.infra.service.codegen.inner.CodegenEngine;
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import com.iailab.module.infra.service.db.DatabaseTableService;
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import com.iailab.module.system.api.user.AdminUserApi;
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import com.baomidou.mybatisplus.generator.config.po.TableField;
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import com.baomidou.mybatisplus.generator.config.po.TableInfo;
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import com.google.common.annotations.VisibleForTesting;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import javax.annotation.Resource;
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import java.util.*;
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import java.util.function.BiPredicate;
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import java.util.stream.Collectors;
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import static com.iailab.framework.common.exception.util.ServiceExceptionUtil.exception;
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import static com.iailab.framework.common.util.collection.CollectionUtils.convertMap;
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import static com.iailab.framework.common.util.collection.CollectionUtils.convertSet;
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import static com.iailab.module.infra.enums.ErrorCodeConstants.*;
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/**
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* 代码生成 Service 实现类
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*
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* @author iailab
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*/
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@Service
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public class CodegenServiceImpl implements CodegenService {
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@Resource
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private DatabaseTableService databaseTableService;
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@Resource
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private CodegenTableMapper codegenTableMapper;
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@Resource
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private CodegenColumnMapper codegenColumnMapper;
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@Resource
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private AdminUserApi userApi;
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@Resource
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private CodegenBuilder codegenBuilder;
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@Resource
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private CodegenEngine codegenEngine;
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@Resource
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private CodegenProperties codegenProperties;
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@Override
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@Transactional(rollbackFor = Exception.class)
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public List<Long> createCodegenList(Long userId, CodegenCreateListReqVO reqVO) {
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List<Long> ids = new ArrayList<>(reqVO.getTableNames().size());
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// 遍历添加。虽然效率会低一点，但是没必要做成完全批量，因为不会这么大量
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reqVO.getTableNames().forEach(tableName -> ids.add(createCodegen(userId, reqVO.getDataSourceConfigId(), tableName)));
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return ids;
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}
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private Long createCodegen(Long userId, Long dataSourceConfigId, String tableName) {
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// 从数据库中，获得数据库表结构
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TableInfo tableInfo = databaseTableService.getTable(dataSourceConfigId, tableName);
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// 导入
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return createCodegen0(userId, dataSourceConfigId, tableInfo);
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}
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private Long createCodegen0(Long userId, Long dataSourceConfigId, TableInfo tableInfo) {
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// 校验导入的表和字段非空
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validateTableInfo(tableInfo);
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// 校验是否已经存在
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if (codegenTableMapper.selectByTableNameAndDataSourceConfigId(tableInfo.getName(),
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dataSourceConfigId) != null) {
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throw exception(CODEGEN_TABLE_EXISTS);
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}
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// 构建 CodegenTableDO 对象，插入到 DB 中
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CodegenTableDO table = codegenBuilder.buildTable(tableInfo);
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table.setDataSourceConfigId(dataSourceConfigId);
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table.setScene(CodegenSceneEnum.ADMIN.getScene()); // 默认配置下，使用管理后台的模板
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table.setFrontType(codegenProperties.getFrontType());
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table.setAuthor(userApi.getUser(userId).getCheckedData().getNickname());
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codegenTableMapper.insert(table);
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// 构建 CodegenColumnDO 数组，插入到 DB 中
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List<CodegenColumnDO> columns = codegenBuilder.buildColumns(table.getId(), tableInfo.getFields());
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// 如果没有主键，则使用第一个字段作为主键
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if (!tableInfo.isHavePrimaryKey()) {
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columns.get(0).setPrimaryKey(true);
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}
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codegenColumnMapper.insertBatch(columns);
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return table.getId();
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}
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@VisibleForTesting
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void validateTableInfo(TableInfo tableInfo) {
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if (tableInfo == null) {
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throw exception(CODEGEN_IMPORT_TABLE_NULL);
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}
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if (StrUtil.isEmpty(tableInfo.getComment())) {
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throw exception(CODEGEN_TABLE_INFO_TABLE_COMMENT_IS_NULL);
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}
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if (CollUtil.isEmpty(tableInfo.getFields())) {
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throw exception(CODEGEN_IMPORT_COLUMNS_NULL);
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}
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tableInfo.getFields().forEach(field -> {
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if (StrUtil.isEmpty(field.getComment())) {
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throw exception(CODEGEN_TABLE_INFO_COLUMN_COMMENT_IS_NULL, field.getName());
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}
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});
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}
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@Override
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@Transactional(rollbackFor = Exception.class)
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public void updateCodegen(CodegenUpdateReqVO updateReqVO) {
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// 校验是否已经存在
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if (codegenTableMapper.selectById(updateReqVO.getTable().getId()) == null) {
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throw exception(CODEGEN_TABLE_NOT_EXISTS);
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}
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// 校验主表字段存在
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if (Objects.equals(updateReqVO.getTable().getTemplateType(), CodegenTemplateTypeEnum.SUB.getType())) {
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if (codegenTableMapper.selectById(updateReqVO.getTable().getMasterTableId()) == null) {
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throw exception(CODEGEN_MASTER_TABLE_NOT_EXISTS, updateReqVO.getTable().getMasterTableId());
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}
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if (CollUtil.findOne(updateReqVO.getColumns(), // 关联主表的字段不存在
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column -> column.getId().equals(updateReqVO.getTable().getSubJoinColumnId())) == null) {
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throw exception(CODEGEN_SUB_COLUMN_NOT_EXISTS, updateReqVO.getTable().getSubJoinColumnId());
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}
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}
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// 更新 table 表定义
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CodegenTableDO updateTableObj = BeanUtils.toBean(updateReqVO.getTable(), CodegenTableDO.class);
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codegenTableMapper.updateById(updateTableObj);
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// 更新 column 字段定义
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List<CodegenColumnDO> updateColumnObjs = BeanUtils.toBean(updateReqVO.getColumns(), CodegenColumnDO.class);
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updateColumnObjs.forEach(updateColumnObj -> codegenColumnMapper.updateById(updateColumnObj));
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}
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@Override
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@Transactional(rollbackFor = Exception.class)
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public void syncCodegenFromDB(Long tableId) {
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// 校验是否已经存在
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CodegenTableDO table = codegenTableMapper.selectById(tableId);
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if (table == null) {
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throw exception(CODEGEN_TABLE_NOT_EXISTS);
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}
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// 从数据库中，获得数据库表结构
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TableInfo tableInfo = databaseTableService.getTable(table.getDataSourceConfigId(), table.getTableName());
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// 执行同步
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syncCodegen0(tableId, tableInfo);
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}
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private void syncCodegen0(Long tableId, TableInfo tableInfo) {
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// 1. 校验导入的表和字段非空
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validateTableInfo(tableInfo);
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List<TableField> tableFields = tableInfo.getFields();
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// 2. 构建 CodegenColumnDO 数组，只同步新增的字段
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List<CodegenColumnDO> codegenColumns = codegenColumnMapper.selectListByTableId(tableId);
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Set<String> codegenColumnNames = convertSet(codegenColumns, CodegenColumnDO::getColumnName);
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// 3.1 计算需要【修改】的字段，插入时重新插入，删除时将原来的删除
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Map<String, CodegenColumnDO> codegenColumnDOMap = convertMap(codegenColumns, CodegenColumnDO::getColumnName);
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BiPredicate<TableField, CodegenColumnDO> primaryKeyPredicate =
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(tableField, codegenColumn) -> tableField.getMetaInfo().getJdbcType().name().equals(codegenColumn.getDataType())
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&& tableField.getMetaInfo().isNullable() == codegenColumn.getNullable()
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&& tableField.isKeyFlag() == codegenColumn.getPrimaryKey()
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&& tableField.getComment().equals(codegenColumn.getColumnComment());
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Set<String> modifyFieldNames = tableFields.stream()
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.filter(tableField -> codegenColumnDOMap.get(tableField.getColumnName()) != null
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&& !primaryKeyPredicate.test(tableField, codegenColumnDOMap.get(tableField.getColumnName())))
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.map(TableField::getColumnName)
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.collect(Collectors.toSet());
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// 3.2 计算需要【删除】的字段
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Set<String> tableFieldNames = convertSet(tableFields, TableField::getName);
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Set<Long> deleteColumnIds = codegenColumns.stream()
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.filter(column -> (!tableFieldNames.contains(column.getColumnName())) || modifyFieldNames.contains(column.getColumnName()))
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.map(CodegenColumnDO::getId).collect(Collectors.toSet());
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// 移除已经存在的字段
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tableFields.removeIf(column -> codegenColumnNames.contains(column.getColumnName()) && (!modifyFieldNames.contains(column.getColumnName())));
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if (CollUtil.isEmpty(tableFields) && CollUtil.isEmpty(deleteColumnIds)) {
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throw exception(CODEGEN_SYNC_NONE_CHANGE);
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}
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// 4.1 插入新增的字段
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List<CodegenColumnDO> columns = codegenBuilder.buildColumns(tableId, tableFields);
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codegenColumnMapper.insertBatch(columns);
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// 4.2 删除不存在的字段
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if (CollUtil.isNotEmpty(deleteColumnIds)) {
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codegenColumnMapper.deleteBatchIds(deleteColumnIds);
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}
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}
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@Override
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@Transactional(rollbackFor = Exception.class)
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public void deleteCodegen(Long tableId) {
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// 校验是否已经存在
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if (codegenTableMapper.selectById(tableId) == null) {
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throw exception(CODEGEN_TABLE_NOT_EXISTS);
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}
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// 删除 table 表定义
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codegenTableMapper.deleteById(tableId);
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// 删除 column 字段定义
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codegenColumnMapper.deleteListByTableId(tableId);
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}
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@Override
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public List<CodegenTableDO> getCodegenTableList(Long dataSourceConfigId) {
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return codegenTableMapper.selectListByDataSourceConfigId(dataSourceConfigId);
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}
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@Override
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public PageResult<CodegenTableDO> getCodegenTablePage(CodegenTablePageReqVO pageReqVO) {
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return codegenTableMapper.selectPage(pageReqVO);
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}
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@Override
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public CodegenTableDO getCodegenTable(Long id) {
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return codegenTableMapper.selectById(id);
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}
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@Override
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public List<CodegenColumnDO> getCodegenColumnListByTableId(Long tableId) {
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return codegenColumnMapper.selectListByTableId(tableId);
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}
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@Override
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public Map<String, String> generationCodes(Long tableId) {
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// 校验是否已经存在
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CodegenTableDO table = codegenTableMapper.selectById(tableId);
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if (table == null) {
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throw exception(CODEGEN_TABLE_NOT_EXISTS);
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}
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List<CodegenColumnDO> columns = codegenColumnMapper.selectListByTableId(tableId);
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if (CollUtil.isEmpty(columns)) {
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throw exception(CODEGEN_COLUMN_NOT_EXISTS);
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}
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// 如果是主子表，则加载对应的子表信息
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List<CodegenTableDO> subTables = null;
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List<List<CodegenColumnDO>> subColumnsList = null;
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if (CodegenTemplateTypeEnum.isMaster(table.getTemplateType())) {
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// 校验子表存在
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subTables = codegenTableMapper.selectListByTemplateTypeAndMasterTableId(
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CodegenTemplateTypeEnum.SUB.getType(), tableId);
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if (CollUtil.isEmpty(subTables)) {
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throw exception(CODEGEN_MASTER_GENERATION_FAIL_NO_SUB_TABLE);
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}
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// 校验子表的关联字段存在
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subColumnsList = new ArrayList<>();
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for (CodegenTableDO subTable : subTables) {
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List<CodegenColumnDO> subColumns = codegenColumnMapper.selectListByTableId(subTable.getId());
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if (CollUtil.findOne(subColumns, column -> column.getId().equals(subTable.getSubJoinColumnId())) == null) {
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throw exception(CODEGEN_SUB_COLUMN_NOT_EXISTS, subTable.getId());
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}
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subColumnsList.add(subColumns);
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}
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}
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// 执行生成
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return codegenEngine.execute(table, columns, subTables, subColumnsList);
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}
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@Override
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public List<DatabaseTableRespVO> getDatabaseTableList(Long dataSourceConfigId, String name, String comment) {
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List<TableInfo> tables = databaseTableService.getTableList(dataSourceConfigId, name, comment);
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// 移除在 Codegen 中，已经存在的
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Set<String> existsTables = convertSet(
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codegenTableMapper.selectListByDataSourceConfigId(dataSourceConfigId), CodegenTableDO::getTableName);
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tables.removeIf(table -> existsTables.contains(table.getName()));
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return BeanUtils.toBean(tables, DatabaseTableRespVO.class);
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}
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}
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