mini-starter/src/server/utils/generic-crud.routes.ts

import { createRoute, OpenAPIHono } from '@hono/zod-openapi';
import { z } from '@hono/zod-openapi';
import { GenericCrudService, CrudOptions } from './generic-crud.service';
import { ErrorSchema } from './errorHandler';
import { AuthContext } from '../types/context';
import { ObjectLiteral } from 'typeorm';
import { AppDataSource } from '../data-source';

export function createCrudRoutes<T extends ObjectLiteral>(options: CrudOptions<T>) {
  const { entity, createSchema, updateSchema, getSchema, listSchema, searchFields, middleware = [] } = options;
  
  // 创建CRUD服务实例
  // 抽象类不能直接实例化，需要创建具体实现类
  class ConcreteCrudService extends GenericCrudService<T> {
    constructor() {
      super(AppDataSource, entity);
    }
  }
  const crudService = new ConcreteCrudService();
  
  // 创建路由实例
  const app = new OpenAPIHono<AuthContext>();
  
  // 分页查询路由
  const listRoute = createRoute({
    method: 'get',
    path: '/',
    middleware,
    request: {
      query: z.object({
        page: z.coerce.number().int().positive().default(1).openapi({
          example: 1,
          description: '页码，从1开始'
        }),
        pageSize: z.coerce.number().int().positive().default(10).openapi({
          example: 10,
          description: '每页数量'
        }),
        keyword: z.string().optional().openapi({
          example: '搜索关键词',
          description: '搜索关键词'
        }),
        sortBy: z.string().optional().openapi({
          example: 'createdAt',
          description: '排序字段'
        }),
        sortOrder: z.enum(['ASC', 'DESC']).optional().default('DESC').openapi({
          example: 'DESC',
          description: '排序方向'
        })
      })
    },
    responses: {
      200: {
        description: '成功获取列表',
        content: {
          'application/json': {
            schema: z.object({
              data: z.array(listSchema),
              pagination: z.object({
                total: z.number().openapi({ example: 100, description: '总记录数' }),
                current: z.number().openapi({ example: 1, description: '当前页码' }),
                pageSize: z.number().openapi({ example: 10, description: '每页数量' })
              })
            })
          }
        }
      },
      400: {
        description: '参数错误',
        content: { 'application/json': { schema: ErrorSchema } }
      },
      500: {
        description: '服务器错误',
        content: { 'application/json': { schema: ErrorSchema } }
      }
    }
  });
  
  // 创建资源路由
  const createRouteDef = createRoute({
    method: 'post',
    path: '/',
    middleware,
    request: {
      body: {
        content: {
          'application/json': { schema: createSchema }
        }
      }
    },
    responses: {
      201: {
        description: '创建成功',
        content: { 'application/json': { schema: getSchema } }
      },
      400: {
        description: '输入数据无效',
        content: { 'application/json': { schema: ErrorSchema } }
      },
      500: {
        description: '服务器错误',
        content: { 'application/json': { schema: ErrorSchema } }
      }
    }
  });
  
  // 获取单个资源路由
  const getRouteDef = createRoute({
    method: 'get',
    path: '/{id}',
    middleware,
    request: {
      params: z.object({
        id: z.coerce.number().openapi({
          param: { name: 'id', in: 'path' },
          example: 1,
          description: '资源ID'
        })
      })
    },
    responses: {
      200: {
        description: '成功获取详情',
        content: { 'application/json': { schema: getSchema } }
      },
      400: {
        description: '资源不存在',
        content: { 'application/json': { schema: ErrorSchema } }
      },
      404: {
        description: '参数验证失败',
        content: { 'application/json': { schema: ErrorSchema } }
      },
      500: {
        description: '服务器错误',
        content: { 'application/json': { schema: ErrorSchema } }
      }
    }
  });
  
  // 更新资源路由
  const updateRouteDef = createRoute({
    method: 'put',
    path: '/{id}',
    middleware,
    request: {
      params: z.object({
        id: z.coerce.number().openapi({
          param: { name: 'id', in: 'path' },
          example: 1,
          description: '资源ID'
        })
      }),
      body: {
        content: {
          'application/json': { schema: updateSchema }
        }
      }
    },
    responses: {
      200: {
        description: '更新成功',
        content: { 'application/json': { schema: getSchema } }
      },
      400: {
        description: '无效输入',
        content: { 'application/json': { schema: ErrorSchema } }
      },
      404: {
        description: '资源不存在',
        content: { 'application/json': { schema: ErrorSchema } }
      },
      500: {
        description: '服务器错误',
        content: { 'application/json': { schema: ErrorSchema } }
      }
    }
  });
  
  // 删除资源路由
  const deleteRouteDef = createRoute({
    method: 'delete',
    path: '/{id}',
    middleware,
    request: {
      params: z.object({
        id: z.coerce.number().openapi({
          param: { name: 'id', in: 'path' },
          example: 1,
          description: '资源ID'
        })
      })
    },
    responses: {
      204: { description: '删除成功' },
      404: {
        description: '资源不存在',
        content: { 'application/json': { schema: ErrorSchema } }
      },
      500: {
        description: '服务器错误',
        content: { 'application/json': { schema: ErrorSchema } }
      }
    }
  });
  
  // 注册路由处理函数
  const routes = app
    .openapi(listRoute, async (c) => {
      try {
        const { page, pageSize, keyword, sortBy, sortOrder } = c.req.valid('query');
        
        // 构建排序对象
        // 使用Record和类型断言解决泛型索引写入问题
        const order: Partial<Record<keyof T, 'ASC' | 'DESC'>> = {};
        if (sortBy) {
          (order as Record<string, 'ASC' | 'DESC'>)[sortBy] = sortOrder || 'DESC';
        } else {
          // 默认按id降序排序
          (order as Record<string, 'ASC' | 'DESC'>)['id'] = 'DESC';
        }
        
        const [data, total] = await crudService.getList(
          page,
          pageSize,
          keyword,
          searchFields,
          undefined, // where条件
          [], // relations
          order
        );
        
        return c.json({
          data: data as any[],
          pagination: { total, current: page, pageSize }
        }, 200);
      } catch (error) {
        if (error instanceof z.ZodError) {
          return c.json({ code: 400, message: '参数验证失败', errors: error.errors }, 400);
        }
        return c.json({
          code: 500,
          message: error instanceof Error ? error.message : '获取列表失败'
        }, 500);
      }
    })
    .openapi(createRouteDef, async (c) => {
      try {
        const data = c.req.valid('json');
        const result = await crudService.create(data);
        return c.json(result, 201);
      } catch (error) {
        if (error instanceof z.ZodError) {
          return c.json({ code: 400, message: '参数验证失败', errors: error.errors }, 400);
        }
        return c.json({
          code: 500,
          message: error instanceof Error ? error.message : '创建资源失败'
        }, 500);
      }
    })
    .openapi(getRouteDef, async (c) => {
      try {
        const { id } = c.req.valid('param');
        const result = await crudService.getById(id);
        
        if (!result) {
          return c.json({ code: 404, message: '资源不存在' }, 404);
        }
        
        return c.json(result, 200);
      } catch (error) {
        if (error instanceof z.ZodError) {
          return c.json({ code: 400, message: '参数验证失败', errors: error.errors }, 400);
        }
        return c.json({
          code: 500,
          message: error instanceof Error ? error.message : '获取资源失败'
        }, 500);
      }
    })
    .openapi(updateRouteDef, async (c) => {
      try {
        const { id } = c.req.valid('param');
        const data = c.req.valid('json');
        const result = await crudService.update(id, data);
        
        if (!result) {
          return c.json({ code: 404, message: '资源不存在' }, 404);
        }
        
        return c.json(result, 200);
      } catch (error) {
        if (error instanceof z.ZodError) {
          return c.json({ code: 400, message: '参数验证失败', errors: error.errors }, 400);
        }
        if (error instanceof z.ZodError) {
          return c.json({ code: 400, message: '参数验证失败', errors: error.errors }, 400);
        }
        return c.json({
          code: 500,
          message: error instanceof Error ? error.message : '更新资源失败'
        }, 500);
      }
    })
    .openapi(deleteRouteDef, async (c) => {
      try {
        const { id } = c.req.valid('param');
        const success = await crudService.delete(id);
        
        if (!success) {
          return c.json({ code: 404, message: '资源不存在' }, 404);
        }
        
        return c.body(null, 204) as unknown as Response;
      } catch (error) {
        if (error instanceof z.ZodError) {
          return c.json({ code: 400, message: '参数验证失败', errors: error.errors }, 400);
        }
        if (error instanceof z.ZodError) {
          return c.json({ code: 400, message: '参数验证失败', errors: error.errors }, 400);
        }
        return c.json({
          code: 500,
          message: error instanceof Error ? error.message : '删除资源失败'
        }, 500);
      }
    });
  
  return routes;
}