Validate Incoming Body Against a yup schema

ValidationMiddleware.ts

import { NextFunction, Request, Response } from 'express'
import { BaseSchema } from 'yup'
import { MixedSchema } from 'yup/lib/mixed'

/**
 * This middleware checks the req.body against an yup schema provided in it
 * @example
 * ```
 *    validate(incomingRequestBody, incomingBodySchema)
 *
 * ```
 * @returns - If body is not valid according to yup schema, returns yup validation error.
 *    calls next() if incoming body adheres to schema shape.
 * */

export const validate =
  (schema: MixedSchema | BaseSchema) =>
  async (
    req: Request,
    res: Response,
    next: NextFunction
  ): Promise<void | Response> => {
    const body = req.body
    try {
      await schema.validate(body, {
        abortEarly: false,
      })
      return next()
    } catch (error) {
      return res.status(400).json({
        error,
      })
    }
  }