freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-javascript/6a0dcc730cb92a616f86f0c4.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
6a0dcc730cb92a616f86f0c4	Challenge 300: Schema Validator Part 6	28	challenge-300

--description--

Given an object (JavaScript) or dictionary (Python), determine if it matches the following schema:

Roles = "user" | "creator" | "moderator" | "staff" | "admin"

UserProfile = {
  username: string,
  posts: number,
  verified: boolean,
  role: Roles,
  supporter?: boolean,
  badges: string[]
}

{
  users: UserProfile[]
}

• The pipe (|) symbol means "or". role must be one of the listed Roles values.
• The question mark (?) after supporter means that the field is optional, but is the specified type if it exists.
• UserProfile[] denotes an array of UserProfile objects. An empty array is valid.
• Extra keys are allowed

--hints--

isValidSchema({ users: [{ username: "ron", posts: 14, verified: true, role: "creator", badges: [ "early-adopter" ]}, { username: "cher", posts: 25, verified: true, role: "moderator", supporter: true, followers: 20, badges: [ "helper" ]}]}) should return true.

assert.isTrue(isValidSchema({users: [{ username: "ron", posts: 14, verified: true, role: "creator", badges: [ "early-adopter" ]}, { username: "cher", posts: 25, verified: true, role: "moderator", supporter: true, followers: 20, badges: [ "helper" ]}]}));

isValidSchema({ users: [] }) should return true.

assert.isTrue(isValidSchema({ users: [] }));

isValidSchema({ users: { username: "anne", posts: 0, verified: false, role: "user", supporter: false, badges: []}}) should return false.

assert.isFalse(isValidSchema({ users: { username: "anne", posts: 0, verified: false, role: "user", supporter: false, badges: []}}));

isValidSchema({ users: [{ username: "tony", posts: 10, verified: true, role: "creator", supporter: true, badges: ["liked", 6]}]}) should return false.

assert.isFalse(isValidSchema({ users: [{ username: "tony", posts: 10, verified: true, role: "creator", supporter: true, badges: ["liked", 6]}]}));

isValidSchema({ users: [{ username: "ursula", posts: 3, verified: false, role: "user", supporter: "false", badges: ["comeback"]}]}) should return false.

assert.isFalse(isValidSchema({ users: [{ username: "ursula", posts: 3, verified: false, role: "user", supporter: "false", badges: ["comeback"]}]}));

isValidSchema({ users: [{ username: "benny", posts: 55, verified: true, role: "superstar", supporter: true, badges: ["veteran"]}]}) should return false.

assert.isFalse(isValidSchema({ users: [{ username: "benny", posts: 55, verified: true, role: "superstar", supporter: true, badges: ["veteran"]}]}));

isValidSchema({ users: [{ username: "chase", posts: 1, verified: "yes", role: "staff", supporter: false, badges: ["superstar"]}]}) should return false.

assert.isFalse(isValidSchema({ users: [{ username: "chase", posts: 1, verified: "yes", role: "staff", supporter: false, badges: ["superstar"]}]}));

isValidSchema({ users: [{ username: "carla", posts: "10", verified: false, role: "user", supporter: false, badges: ["newbie"]}]}) should return false.

assert.isFalse(isValidSchema({ users: [{ username: "carla", posts: "10", verified: false, role: "user", supporter: false, badges: ["newbie"]}]}));

isValidSchema({ users: [{ posts: 4, verified: false, role: "admin", supporter: false, badges: ["superuser", "veteran"]}]}) should return false.

assert.isFalse(isValidSchema({ users: [{ posts: 4, verified: false, role: "admin", supporter: false, badges: ["superuser", "veteran"]}]}));

isValidSchema({ users: [{ username: "harold", posts: 80, verified: true, role: "creator", supporter: true, badges: ["liked", "hero"]}, { username: "kim", posts: 11, verified: false, role: "admin", supporter: true, badges: ["first"]}, {}]}) should return false.

assert.isFalse(isValidSchema({ users: [{ username: "harold", posts: 80, verified: true, role: "creator", supporter: true, badges: ["liked", "hero"]}, { username: "kim", posts: 11, verified: false, role: "admin", supporter: true, badges: ["first"]}, {}]}));

--seed--

--seed-contents--

function isValidSchema(obj) {

  return obj;
}

--solutions--

function isValidSchema(obj) {
  const roles = ["user", "creator", "moderator", "staff", "admin"];

  function isValidUser(user) {
    return (
      typeof user.username === 'string' &&
      typeof user.posts === 'number' &&
      typeof user.verified === 'boolean' &&
      roles.includes(user.role) &&
      (user.supporter === undefined || typeof user.supporter === 'boolean') &&
      Array.isArray(user.badges) && user.badges.every(b => typeof b === 'string')
    );
  }

  return Array.isArray(obj.users) && obj.users.every(isValidUser);
}