При переходе к странице поиска выдает сразу всех имеющихся артистов, вообще всех
При попытке выбрать артиста или группа (критерии поиска) выбор сбрасывается
При поиске по имени или жанру возникает ошибка: ReferenceError: role is not defined

Логика должна быть такова: ты заходишь на страницу поиска, НЕ ВВОДЯ В ПОЛЕ ни имени, ни жанра, можешь выбрать роль артист или группа, клацнуть на search и тебе выдаст артистов по выбранной роли
Либо же ты можешь выбрать роль артиста и в поле поиска (жанр, имя) ввести, например, имя и тебе будет выдавать артистов с таким именем и подходящей ролью

P.S: все данные (в том числе роль) хранятся в musicians.json:
{"musicians":[{"id":1,"name":"sukaAAAAAAA","genre":"BluesZ","instrument":"Guitar","soundcloud":"http://soundcloud.com/dasdasdasd","password":"password123","location":"New York","login":"suka","bio":""},{"id":2,"name":"Aerosmith111114446","genre":"Blues","password":"1111","location":"EnglandDdDDDDDDD","thumbnail":"musician_2_jX7hQvfoT2g (2).jpg","instrument":"","bio":"","soundcloud":"https://soundcloud.com/ty-segall-official/my-ladys-on-fire?si=55e4a9622a824ddeb3e725dfa2c41d1d&utm_source=clipboard&utm_medium=text&utm_campaign=social_sharing","soundcloud1":"https://soundcloud.com/ty-segall-official/my-ladys-on-fire?si=55e4a9622a824ddeb3e725dfa2c41d1d&utm_source=clipboard&utm_medium=text&utm_campaign=social_sharing"},{"id":3,"name":"Britpop","genre":"Pop","instrument":"bass","soundcloud":"http://google.com","password":"1111","location":"Sahara","login":"SS1VCSS@gmail.com","thumbnail":"musician_3_photo_2023-02-27_01-16-44.jpg"},{"id":4,"name":"Bobq","genre":"Hip hop","instrument":"keys","soundcloud":"http://cloudnine.ru","password":"1111","location":"Dallas","login":"SSSS1VYTFFSDDD@gmail.com","thumbnail":"musician_4_1mxwr7Ravu4.jpg"},{"id":5,"name":"LOL","genre":"Rock","instrument":"Bass","soundcloud":"https://soundcloud.com/ty-segall-official/my-ladys-on-fire?si=55e4a9622a824ddeb3e725dfa2c41d1d&utm_source=clipboard&utm_medium=text&utm_campaign=social_sharing","password":"1111","location":"Manchester","role":"Artist","login":"111111111@gmail.com","thumbnail":"musician_5_photo_2023-02-27_01-16-43 (2).jpg"}]}

app.js:
const express = require(“express”);
const fs = require(“fs”);
const session = require(“express-session”);
const fileUpload = require(“express-fileupload”);
const app = express();


app.set(“view engine”, “ejs”);
app.use(express.static(“public”));
app.use(express.urlencoded({ extended: true }));
app.use(fileUpload());
app.use(session({
secret: “mysecretkey”,
resave: false,
saveUninitialized: false
}));

const predefinedGenres = [‘Rock’, ‘Pop’, ‘Jazz’, ‘Hip Hop’, ‘Electronic’, ‘Blues’];

function getMusicianById(id) {
const data = fs.readFileSync(“./db/musicians.json”);
const musicians = JSON.parse(data);

return musicians.musicians.find(musician => musician.id === id);
}

function requireLogin(req, res, next) {
if (req.session.musicianId) {
next();
} else {
res.redirect(“/login”);
}
}

function search(query, hiddenRole) {
const data = fs.readFileSync(‘./db/musicians.json’);
const musicians = JSON.parse(data).musicians.map(musician => {
return {
name: musician.name,
genre: musician.genre,
originalName: musician.name,
profileLink: /profile/${musician.id},
thumbnail: musician.thumbnail,
soundcloud: musician.soundcloud
};
});
let results = musicians;
if (query) {
const lowerQuery = query.toLowerCase();
results = musicians.filter(musician => {
const nameScore = musician.name.toLowerCase().startsWith(lowerQuery) ? 2 : musician.name.toLowerCase().includes(lowerQuery) ? 1 : 0;
const genreScore = musician.genre.toLowerCase().startsWith(lowerQuery) ? 2 : musician.genre.toLowerCase().includes(lowerQuery) ? 1 : 0;
return nameScore + genreScore > 0 && (role === ‘’ || musician.role === role);
}).sort((a, b) => {
const aNameScore = a.name.toLowerCase().startsWith(lowerQuery) ? 2 : a.name.toLowerCase().includes(lowerQuery) ? 1 : 0;
const bNameScore = b.name.toLowerCase().startsWith(lowerQuery) ? 2 : b.name.toLowerCase().includes(lowerQuery) ? 1 : 0;
const aGenreScore = a.genre.toLowerCase().startsWith(lowerQuery) ? 2 : a.genre.toLowerCase().includes(lowerQuery) ? 1 : 0;
const bGenreScore = b.genre.toLowerCase().startsWith(lowerQuery) ? 2 : b.genre.toLowerCase().includes(lowerQuery) ? 1 : 0;
return (bNameScore + bGenreScore) - (aNameScore + aGenreScore);
});
}
return results;
}

app.use((req, res, next) => {
if (req.session.musicianId) {
const musician = getMusicianById(req.session.musicianId);
res.locals.musician = musician;
res.locals.userLoggedIn = true;
res.locals.username = musician.name;
} else {
res.locals.userLoggedIn = false;
}

next();
});

app.get(“/”, (req, res) => {
const data = fs.readFileSync(“./db/musicians.json”);
const musicians = JSON.parse(data);

res.render(“index”, { musicians: musicians.musicians });
});

app.get(“/register”, (req, res) => {
if (req.session.musicianId) {
const musician = getMusicianById(req.session.musicianId);
res.redirect(“/profile/” + musician.id);
} else {
res.render(“register”);
}
});

app.post(“/register”, (req, res) => {
if (req.session.musicianId) {
const musician = getMusicianById(req.session.musicianId);
res.redirect(“/profile/” + musician.id);
} else {
const data = fs.readFileSync(“./db/musicians.json”);
const musicians = JSON.parse(data);

const newMusician = {
id: musicians.musicians.length + 1,
name: req.body.name,
genre: req.body.genre,
instrument: req.body.instrument,
soundcloud: req.body.soundcloud,
password: req.body.password,
location: req.body.location,
role: req.body.role,
login: req.body.login
};

if (req.files && req.files.thumbnail) {
const file = req.files.thumbnail;
const filename = “musician_” + newMusician.id + “" + file.name;
file.mv(“./public/img/” + filename);

newMusician.thumbnail = filename;
}

musicians.musicians.push(newMusician);
fs.writeFileSync(“./db/musicians.json”, JSON.stringify(musicians));

req.session.musicianId = newMusician.id;
res.redirect(“/profile/” + newMusician.id);
}
});

app.get(“/profile/:id”, (req, res) => {
const musician = getMusicianById(parseInt(req.params.id));

if (musician) {
res.render(“profile”, { musician: musician });
} else {
res.status(404).send(“Musician not found”);
}
});

app.get(“/login”, (req, res) => {
res.render(“login”);
});

app.post(“/login”, (req, res) => {
const data = fs.readFileSync(“./db/musicians.json”);
const musicians = JSON.parse(data);

const musician = musicians.musicians.find(musician => musician.login === req.body.login && musician.password === req.body.password);

if (musician) {
req.session.musicianId = musician.id;
res.redirect(“/profile/” + musician.id);

} else {
res.render(“login”, { error: “Invalid login or password” });
}
});

app.get(“/logout”, (req, res) => {
req.session.destroy();
res.redirect(“/”);
});

app.get(‘/search’, (req, res) => {
const query = req.query.query || ‘’;
const role = req.query.role || ‘’;
const musicians = search(query, role);
res.locals.predefinedGenres = predefinedGenres;
res.render(‘search’, { musicians, query, role });
});

app.get(“/profile/:id/edit”, requireLogin, (req, res) => {
const musician = getMusicianById(parseInt(req.params.id));

if (musician) {
if (req.session.musicianId === musician.id) { // Check if the logged-in user is the owner of the profile
res.render(“edit-profile”, { musician: musician });
} else {
res.status(403).send(“Access denied”);
}
} else {
res.status(404).send(“Musician not found”);
}
});





app.post(‘/profile/:id/edit’, requireLogin, (req, res) => {
const musician = getMusicianById(parseInt(req.params.id));

if (musician) {
if (!req.body.name || !req.body.genre) {
res.status(400).send(‘Please fill out all fields’);

} else {
musician.name = req.body.name;
musician.genre = req.body.genre;
musician.instrument = req.body.instrument;
musician.soundcloud = req.body.soundcloud;
musician.soundcloud1 = req.body.soundcloud1;
musician.soundcloud2 = req.body.soundcloud2;
musician.location = req.body.location;
musician.role = req.body.role;
musician.bio = req.body.bio;

if (req.files && req.files.thumbnail) {
const file = req.files.thumbnail;
const filename = 'musician’ + musician.id + ‘_’ + file.name;
file.mv(‘./public/img/’ + filename);
musician.thumbnail = filename;
}

const data = fs.readFileSync(‘./db/musicians.json’);
const musicians = JSON.parse(data);
const index = musicians.musicians.findIndex(m => m.id === musician.id);
musicians.musicians[index] = musician;

fs.writeFileSync(‘./db/musicians.json’, JSON.stringify(musicians));

res.redirect(‘/profile/’ + musician.id);
}
} else {
res.status(404).send(‘Musician not found’);
}


});

function isValidSoundCloudUrl(url) {
return url.startsWith(‘https://soundcloud.com/’);
}

app.listen(3000, () => {
console.log(“Server started on port 3000”);
});

search.ejs:

<!DOCTYPE html>
<html>
<head>
<title>Search Musicians</title>
</head>
<body>
<h1>Search Musicians</h1>
<form method=“get” action=”/search">
<label for=“query”>Search by name or genre:</label>
<input type=“text” id=“query” name=“query” value=“<%= query %>”>
<br><br>
<label for=“role”>Search by role:</label>
<select id=“role” name=“role”>
<option value=“”>All</option>
<option value=“Band” <% if (role === ‘Band’) { %>selected<% } %>>Band</option>
<option value=“Artist” <% if (role === ‘Artist’) { %>selected<% } %>>Artist</option>
</select>
<br><br>
<button type=“submit”>Search</button>
</form>
<% if (musicians.length > 0) { %>
<h2>Results:</h2>
<ul>
<% musicians.forEach(musician => { %>
<li>
<a href=“<%= musician.profileLink %>”>
<%= musician.name %>
<% if (musician.thumbnail) { %>
<img src=“/img/<%= musician.thumbnail %>” alt=“<%= musician.name %>”>
<% } %>
</a>
- <%= musician.genre %>
<% if (musician.soundcloud) { %>
<a href=“<%= musician.soundcloud %>”>SoundCloud</a>
<% } %>
</li>
<% }); %>
</ul>
<% } else if (query || role) { %>
<p>No musicians found.</p>
<% } %>

<script>
document.querySelector(‘form’).addEventListener(‘submit’, function (event) {
event.preventDefault();
const query = document.querySelector(‘#query’).value;
const role = document.querySelector(‘#role’).value;
const url = ‘/search?query=’ + encodeURIComponent(query) + ‘&role=’ + encodeURIComponent(role);
window.location.href = url;
});"
</script>
</body>
</html>

и прошу, не используй curly кавычки, когда будешь давать ответ мне, используй обычные