Children on the Flight

children_on_flight.ts

// Task 1. Children on the Flight.
// We are building Web application for the airlines.
// There is a page where we show list of passengers
// for the given flights.
// There is an age restriction:
// All children younger than 5 years old should have
// at least one adult parent or guardian.
// Parent/guardian should be at least 18 years old.
// We want to highlight all children who are not
// allowed to be on the flight.
// Tasks:
// 1. Please suggest backend API (interface only) to
// return list of passengers for this screen.
// 2. Write the function to find all children who are not
// allowed to be on the flight.

interface Passenger {
  id: number;
  name: string;
  year: number;
  guardian: number;
}

const mockData: Passenger[] = [
  // case 1 with guardian
  {
    id: 1,
    name: "Ivan",
    year: 4,
    guardian: 2,
  },
  {
    id: 2,
    name: "Leo",
    year: 20,
    guardian: -1,
  },

  // case 2 without guardian
  {
    id: 3,
    name: "Julia",
    year: 4,
    guardian: -1,
    isRestricted: true,
  },
  {
    id: 4,
    name: "Egor",
    year: 20,
    guardian: -1,
    isRestricted: true,
  },

  // case 3 young guardian
  // child
  {
    id: 5,
    name: "Svetlana",
    year: 4,
    guardian: 6,
    isRestricted: true,
  },
  // guard
  {
    id: 6,
    name: "Vadim",
    year: 17,
    guardian: -1,
  },
];

const res = mockData.filter((p) => p.isRestricted);

const case1 = [];
const case2 = mockData.filter((p) => p.year < 5 && p.guardian === -1);

const case3 = [];
const obj = mockData.reduce((acc, curr) => {
  acc.set(curr.guardian, {id: curr.id, name: curr.name, year: curr.year});
//   acc[curr.guardian] = curr;
  return acc;
}, new Map());

mockData.forEach((p) => {
  if (p.guardian !== -1 && p.year < 5) {
    const guard = obj.get[p.guardian];
    if (guard.year <= 18) {
      case3.push(p);
    }
  }
});

console.log("case1", case1);
console.log("case2", case2);
console.log("case3", case3);
console.log("res", res);