映画の評価
CoddyのJavaScriptジャーニー「論理とフロー」セクションの一部 — レッスン 64/65。
チャレンジ
簡単映画の評価を処理する rateMovie ケースを追加してください。data パラメータには以下が含まれます：
- movieId (数値)
- avgRating (1から5の間の数値)
この関数は以下の処理を行う必要があります：
- 映画が存在するか検証する - 映画が見つからない場合は、"Movie not found!" を results 配列に追加します
- 評価が1から5の間であることを検証する - 評価が無効な場合は、"Invalid rating! Must be between 1 and 5" を results 配列に追加します
- 映画の
avgRatingを更新する Rating added successfully!をresults配列に追加する
自分で試してみよう
// Don't remove the lines below
const util = require('util');
util.inspect.defaultOptions.maxArrayLength = null;
// ---------------------------
const festivalData = {
movies: [{
id: 1,
title: "Inception",
director: "Christopher Nolan",
year: 2010,
mainGenre: "Sci-Fi",
secondGenre: undefined,
avgRating: 0,
available: true
}],
venues: [{
id: 1,
name: "Main Theater",
capacity: 200,
}],
screenings: [{
id: 1,
movieId: 1,
venueId: 1,
date: '2023-10-29',
time: '13:35:00',
availableSeats: 200
}],
tickets: new Set()
};
function manageFestival(actions, data) {
let results = [];
actions.forEach((action, index) => {
const currentData = data[index];
switch(action) {
case "listMovies":
results.push(festivalData.movies);
break;
case "listVenues":
results.push(festivalData.venues);
break;
case "listTickets":
results.push(festivalData.tickets);
break;
case "listScreenings":
results.push(festivalData.screenings);
break;
case "addMovie":
const newMovie = {
id: festivalData.movies.length + 1,
title: currentData.title,
director: currentData.director,
year: currentData.year,
mainGenre: currentData.mainGenre,
secondGenre: currentData.secondGenre,
avgRating: 0,
available: true
};
festivalData.movies.push(newMovie);
results.push("Movie added successfully!");
break;
case "addVenue":
const newVenue = {
id: festivalData.venues.length + 1,
name: currentData.name,
capacity: currentData.capacity,
};
festivalData.venues.push(newVenue);
results.push("Venue added successfully!");
break;
case "addScreening":
const movie = festivalData.movies.find(m => m.id === currentData.movieId);
const venue = festivalData.venues.find(v => v.id === currentData.venueId);
if (!movie || !venue) {
results.push("Movie or venue not found!");
break;
}
const existingScreening = festivalData.screenings.find(s =>
s.venueId === currentData.venueId &&
s.date === currentData.date &&
s.time === currentData.time
);
if (existingScreening) {
results.push("Screening already exists at this time!");
break;
}
const newScreening = {
id: festivalData.screenings.length + 1,
movieId: currentData.movieId,
venueId: currentData.venueId,
date: currentData.date,
time: currentData.time,
availableSeats: venue.capacity
};
festivalData.screenings.push(newScreening);
results.push("Screening added successfully!");
break;
case "buyTicket":
const screening = festivalData.screenings.find(s => s.id === currentData.screeningId);
if (!screening) {
results.push("Screening not found!");
break;
}
if (screening.availableSeats < currentData.quantity) {
results.push("Not enough seats available!");
break;
}
for (let i = 0; i < currentData.quantity; i++) {
const ticketId = `${currentData.screeningId}-${screening.availableSeats - i}`;
festivalData.tickets.add(ticketId);
}
screening.availableSeats -= currentData.quantity;
results.push("Tickets purchased successfully!");
break;
default:
results.push("Invalid action!");
}
});
return results;
}