Schemas.js

const BaseJoi = require('joi');
const sanitizeHtml = require('sanitize-html');

const extension = (joi)=>({
    type: 'string',
    base: joi.string(),
    messages: {
        'string.escapeHTML': '{{#label}} must not include HTML!'             
    },
    rules:{
        escapeHTML:{
            validate(value,helpers){
                const clean = sanitizeHtml(value,{
                    allowedTags:[],
                    allowedAttributes:{},
                });
                if(clean !== value) return helpers.error('string.escapeHTML', {value}) 
                return clean;
            }
        }
    }
})
const Joi = BaseJoi.extend(extension)
module.exports.campgroundSchema = Joi.object({
    campground: Joi.object({
        title: Joi.string().required().escapeHTML(),
        price: Joi.number().required().min(0),
        // image: Joi.string().required(),
        location: Joi.string().required().escapeHTML(),
        description: Joi.string().required().escapeHTML()
    }).required(),
    deleteImages: Joi.array()
});

module.exports.reviewSchema = Joi.object({
    review: Joi.object({
        rating: Joi.number().required().min(1).max(5),
        body: Joi.string().required().escapeHTML(),
    }).required()
})