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users.js
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users.js
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const users = [];
const addUser = ({id, name, room}) => {
name = name.trim();
room = room.trim();
const existingUser = users.find((user) => user.room === room && user.name === name);
if (existingUser) {
return {error: 'Username is taken'};
}
const user = { id, name, room, isTyping: false };
users.push(user);
return { user };
};
const removeUser = (id) => {
const index = users.findIndex((user) => user.id === id);
if (index !== -1) {
return users.splice(index, 1)[0];
}
};
const getUser = (id) => users.find((user) => user.id === id);
const setUserIsTyping = (id, isTyping) => {
// to set status of a user as typing we fetch his index from the array and set the status
const user = getUser(id);
const userIndex = users.indexOf(user);
users[userIndex].isTyping = !!isTyping;
// also we return the modified user
return user
};
const getUsersInRoom = (room) => users.filter((user) => user.room === room);
module.exports = {addUser, removeUser, getUser, getUsersInRoom, setUserIsTyping};