huncwot/request.js

A Programming Environment for TypeScript apps built on top of VS Code

// Copyright 2019 Zaiste & contributors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

const Schema = require('validate');

const { JSONPayload } = require('./response.js');

const validate = shape => {
  const schema = new Schema(shape);

  return next => request => {
    const { params } = request;
    const errors = schema.validate(params);

    if (errors.length) {
      return JSONPayload(
        errors.map(_ => _.message),
        422
      );
    } else {
      return next(request);
    }
  };
};

module.exports = {
  validate
};