nukak-express
Version:
flexible and efficient ORM, with declarative JSON syntax and smart type-safety
190 lines • 24.7 kB
JavaScript
import { Router as expressRouter } from 'express';
import { getQuerier } from 'nukak';
import { getEntities, getMeta } from 'nukak/entity';
import { kebabCase } from 'nukak/util';
import { parseQuery } from './query.util.js';
export function querierMiddleware(opts = {}) {
const router = expressRouter();
const { include, exclude, ...extra } = opts;
let entities = include ?? getEntities();
if (exclude) {
entities = entities.filter((entity) => !opts.exclude.includes(entity));
}
if (!entities.length) {
throw new TypeError('no entities for the nukak express middleware');
}
for (const entity of entities) {
const path = kebabCase(entity.name);
const subRouter = buildQuerierRouter(entity, extra);
router.use('/' + path, subRouter);
}
return router;
}
export function buildQuerierRouter(entity, opts) {
const meta = getMeta(entity);
const router = expressRouter();
router.use((req, res, next) => {
pre(req, meta, opts);
next();
});
router.get('/one', async (req, res, next) => {
const q = req.query;
const querier = await getQuerier();
try {
const data = await querier.findOne(entity, q);
res.json({ data, count: data ? 1 : 0 });
}
catch (err) {
next(err);
}
});
router.get('/:id', async (req, res, next) => {
const id = req.params.id;
const q = req.query;
q.$where ??= {};
if (Array.isArray(q.$where)) {
q.$where.push(id);
}
else {
q.$where[meta.id] = id;
}
const querier = await getQuerier();
try {
const data = await querier.findOne(entity, q);
res.json({ data, count: data ? 1 : 0 });
}
catch (err) {
next(err);
}
});
router.get('/', async (req, res, next) => {
const q = req.query;
const querier = await getQuerier();
try {
const findManyPromise = querier.findMany(entity, q);
const countPromise = req.query.count ? querier.count(entity, q) : undefined;
const [data, count] = await Promise.all([findManyPromise, countPromise]);
res.json({ data, count });
}
catch (err) {
next(err);
}
});
router.get('/count', async (req, res, next) => {
const q = req.query;
const querier = await getQuerier();
try {
const count = await querier.count(entity, q);
res.json({ data: count, count });
}
catch (err) {
next(err);
}
});
router.post('/', async (req, res, next) => {
const payload = req.body;
const querier = await getQuerier();
try {
await querier.beginTransaction();
const id = await querier.insertOne(entity, payload);
await querier.commitTransaction();
res.json({ data: id, count: id ? 1 : 0 });
}
catch (err) {
await querier.rollbackTransaction();
next(err);
}
finally {
await querier.release();
}
});
router.patch('/:id', async (req, res, next) => {
const payload = req.body;
const id = req.params.id;
const q = req.query;
q.$where ??= {};
if (Array.isArray(q.$where)) {
q.$where.push(id);
}
else {
q.$where[meta.id] = id;
}
const querier = await getQuerier();
try {
await querier.beginTransaction();
const count = await querier.updateMany(entity, q, payload);
await querier.commitTransaction();
res.json({ data: req.params.id, count });
}
catch (err) {
await querier.rollbackTransaction();
next(err);
}
finally {
await querier.release();
}
});
router.delete('/:id', async (req, res, next) => {
const id = req.params.id;
const q = req.query;
q.$where ??= {};
if (Array.isArray(q.$where)) {
q.$where.push(id);
}
else {
q.$where[meta.id] = id;
}
const querier = await getQuerier();
try {
await querier.beginTransaction();
const count = await querier.deleteMany(entity, q, {
softDelete: !!req.query.softDelete,
});
await querier.commitTransaction();
res.json({ data: req.params.id, count });
}
catch (err) {
await querier.rollbackTransaction();
next(err);
}
finally {
await querier.release();
}
});
router.delete('/', async (req, res, next) => {
const q = req.query;
const querier = await getQuerier();
let ids = [];
let count = 0;
try {
await querier.beginTransaction();
const founds = await querier.findMany(entity, q);
if (founds.length) {
ids = founds.map((found) => found[meta.id]);
count = await querier.deleteMany(entity, { $where: ids }, { softDelete: !!req.query.softDelete });
}
await querier.commitTransaction();
res.json({ data: ids, count });
}
catch (err) {
await querier.rollbackTransaction();
next(err);
}
finally {
await querier.release();
}
});
return router;
}
function pre(req, meta, extra) {
const method = req.method;
parseQuery(req);
extra.pre?.(req, meta);
if (method === 'POST' || method === 'PATCH' || method === 'PUT') {
extra.preSave?.(req, meta);
}
else if (method === 'GET' || method === 'DELETE') {
extra.preFilter?.(req, meta);
}
}
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{ Router as expressRouter, type Request } from 'express';\nimport { getQuerier } from 'nukak';\nimport { getEntities, getMeta } from 'nukak/entity';\nimport type { EntityMeta, IdValue, Query, Type } from 'nukak/type';\nimport { kebabCase } from 'nukak/util';\nimport { parseQuery } from './query.util.js';\n\nexport function querierMiddleware(opts: MiddlewareOptions = {}) {\n  const router = expressRouter();\n\n  const { include, exclude, ...extra } = opts;\n\n  let entities = include ?? getEntities();\n\n  if (exclude) {\n    entities = entities.filter((entity) => !opts.exclude.includes(entity));\n  }\n\n  if (!entities.length) {\n    throw new TypeError('no entities for the nukak express middleware');\n  }\n\n  for (const entity of entities) {\n    const path = kebabCase(entity.name);\n    const subRouter = buildQuerierRouter(entity, extra);\n    router.use('/' + path, subRouter);\n  }\n\n  return router;\n}\n\nexport function buildQuerierRouter<E>(entity: Type<E>, opts: ExtraOptions) {\n  const meta = getMeta(entity);\n  const router = expressRouter();\n\n  router.use((req, res, next) => {\n    pre(req, meta, opts);\n    next();\n  });\n\n  router.get('/one', async (req, res, next) => {\n    const q = req.query as Query<E>;\n    const querier = await getQuerier();\n    try {\n      const data = await querier.findOne(entity, q);\n      res.json({ data, count: data ? 1 : 0 });\n    } catch (err: any) {\n      next(err);\n    }\n  });\n\n  router.get('/:id', async (req, res, next) => {\n    const id = req.params.id as IdValue<E>;\n    const q = req.query as Query<E>;\n    q.$where ??= {};\n    if (Array.isArray(q.$where)) {\n      q.$where.push(id);\n    } else {\n      q.$where[meta.id as string] = id;\n    }\n    const querier = await getQuerier();\n    try {\n      const data = await querier.findOne(entity, q);\n      res.json({ data, count: data ? 1 : 0 });\n    } catch (err: any) {\n      next(err);\n    }\n  });\n\n  router.get('/', async (req, res, next) => {\n    const q = req.query as Query<E>;\n    const querier = await getQuerier();\n    try {\n      const findManyPromise = querier.findMany(entity, q);\n      const countPromise = req.query.count ? querier.count(entity, q) : undefined;\n      const [data, count] = await Promise.all([findManyPromise, countPromise]);\n      res.json({ data, count });\n    } catch (err: any) {\n      next(err);\n    }\n  });\n\n  router.get('/count', async (req, res, next) => {\n    const q = req.query as Query<E>;\n    const querier = await getQuerier();\n    try {\n      const count = await querier.count(entity, q);\n      res.json({ data: count, count });\n    } catch (err: any) {\n      next(err);\n    }\n  });\n\n  router.post('/', async (req, res, next) => {\n    const payload = req.body as E;\n    const querier = await getQuerier();\n    try {\n      await querier.beginTransaction();\n      const id = await querier.insertOne(entity, payload);\n      await querier.commitTransaction();\n      res.json({ data: id, count: id ? 1 : 0 });\n    } catch (err: any) {\n      await querier.rollbackTransaction();\n      next(err);\n    } finally {\n      await querier.release();\n    }\n  });\n\n  router.patch('/:id', async (req, res, next) => {\n    const payload = req.body as E;\n    const id = req.params.id as IdValue<E>;\n    const q = req.query as Query<E>;\n    q.$where ??= {};\n    if (Array.isArray(q.$where)) {\n      q.$where.push(id);\n    } else {\n      q.$where[meta.id as string] = id;\n    }\n    const querier = await getQuerier();\n    try {\n      await querier.beginTransaction();\n      const count = await querier.updateMany(entity, q, payload);\n      await querier.commitTransaction();\n      res.json({ data: req.params.id, count });\n    } catch (err: any) {\n      await querier.rollbackTransaction();\n      next(err);\n    } finally {\n      await querier.release();\n    }\n  });\n\n  router.delete('/:id', async (req, res, next) => {\n    const id = req.params.id as IdValue<E>;\n    const q = req.query as Query<E>;\n    q.$where ??= {};\n    if (Array.isArray(q.$where)) {\n      q.$where.push(id);\n    } else {\n      q.$where[meta.id as string] = id;\n    }\n    const querier = await getQuerier();\n    try {\n      await querier.beginTransaction();\n      const count = await querier.deleteMany(entity, q, {\n        softDelete: !!req.query.softDelete,\n      });\n      await querier.commitTransaction();\n      res.json({ data: req.params.id, count });\n    } catch (err: any) {\n      await querier.rollbackTransaction();\n      next(err);\n    } finally {\n      await querier.release();\n    }\n  });\n\n  router.delete('/', async (req, res, next) => {\n    const q = req.query as Query<E>;\n    const querier = await getQuerier();\n    let ids: IdValue<E>[] = [];\n    let count = 0;\n    try {\n      await querier.beginTransaction();\n      const founds = await querier.findMany(entity, q);\n      if (founds.length) {\n        ids = founds.map((found) => found[meta.id]);\n        count = await querier.deleteMany(entity, { $where: ids }, { softDelete: !!req.query.softDelete });\n      }\n      await querier.commitTransaction();\n      res.json({ data: ids, count });\n    } catch (err: any) {\n      await querier.rollbackTransaction();\n      next(err);\n    } finally {\n      await querier.release();\n    }\n  });\n\n  return router;\n}\n\nfunction pre(req: Request, meta: EntityMeta<any>, extra: ExtraOptions) {\n  const method = req.method;\n  parseQuery(req);\n  extra.pre?.(req, meta);\n  if (method === 'POST' || method === 'PATCH' || method === 'PUT') {\n    extra.preSave?.(req, meta);\n  } else if (method === 'GET' || method === 'DELETE') {\n    extra.preFilter?.(req, meta);\n  }\n}\n\ntype ExtraOptions = {\n  /**\n   * Allow augment any kind of request before it runs\n   */\n  readonly pre?: Pre;\n  /**\n   * Allow augment a saving request (POST, PATCH, PUT) before it runs\n   */\n  readonly preSave?: PreSave;\n  /**\n   * Allow augment a filtering request (GET, PUT, DELETE) before it runs\n   */\n  readonly preFilter?: PreFilter;\n};\n\ntype MiddlewareOptions = {\n  readonly include?: Type<unknown>[];\n  readonly exclude?: Type<unknown>[];\n} & ExtraOptions;\n\ntype Pre = <E = unknown>(req: Request, meta: EntityMeta<E>) => void;\ntype PreSave = <E = unknown>(req: Request, meta: EntityMeta<E>) => void;\ntype PreFilter = <E = unknown>(req: Request, meta: EntityMeta<E>) => void;\n"]}