task.ts

import { body } from "express-validator";

// more info about validators:
// https://express-validator.github.io/docs/guides/validation-chain
// https://github.com/validatorjs/validator.js#validators

const makeIDValidator = () =>
  body("_id")
    .exists()
    .withMessage("_id is required")
    .bail()
    .isMongoId()
    .withMessage("_id must be a MongoDB object ID");
const makeTitleValidator = () =>
  body("title")
    // title must exist, if not this message will be displayed
    .exists()
    .withMessage("title is required")
    // bail prevents the remainder of the validation chain for this field from being executed if
    // there was an error
    .bail()
    .isString()
    .withMessage("title must be a string")
    .bail()
    .notEmpty()
    .withMessage("title cannot be empty");
const makeDescriptionValidator = () =>
  body("description")
    // order matters for the validation chain - by marking this field as optional, the rest of
    // the chain will only be evaluated if it exists
    .optional()
    .isString()
    .withMessage("description must be a string");
const makeIsCheckedValidator = () =>
  body("isChecked").optional().isBoolean().withMessage("isChecked must be a boolean");
const makeDateCreatedValidator = () =>
  body("dateCreated").isISO8601().withMessage("dateCreated must be a valid date-time string");
// assignee is for Part 2.1
const makeAssigneeValidator = () =>
  body("assignee").optional().isMongoId().withMessage("assignee must be a MongoDB object ID");

// establishes a set of rules that the body of the task creation route must follow
export const createTask = [
  makeTitleValidator(),
  makeDescriptionValidator(),
  makeIsCheckedValidator(),
];

export const updateTask = [
  makeIDValidator(),
  makeTitleValidator(),
  makeDescriptionValidator(),
  makeIsCheckedValidator(),
  makeDateCreatedValidator(),
  makeAssigneeValidator(), // for Part 2.1
];