chaity-validation.ts

import {
    Result,
    ValidationError,
    validationResult,
} from 'express-validator'
import { Request, Response, NextFunction } from 'express'

export const validateCharity = async (
    req: Request,
    res: Response,
    next: NextFunction
) => {
    const errors: Result = validationResult(req)
    const errorMessages: ValidationError[] = errors.array()

    //Check if an organisation with a name & charity number already exists
    await validateCharityNumber(req, errorMessages)

    if (!errorMessages.length) return next()
    else return res.status(422).json({ errors: errorMessages })
}
 

const validateCharityNumber = async (
    req: Request,
    errorMessages: ValidationError[]
) => {
    let charity;
    try {
        //insert business logic to check of charity details 
    } catch (error) {
        console.info('charity not found')
    }

    if (charity.length) {
        errorMessages.push({
            value: '',
            msg: `A chaity with a regitration code '${req.body.charityNumber}' already exists`,
            param: 'email',
            location: 'body',
        })
    }
    return charity
}