Final Exam 13.12.2020 - Problem 03

function problemThree(input) {
    let capacity = input.shift();
    capacity = Number(capacity);
    let messages = {};

    let line;
    while ((line = input.shift()) !== 'Statistics') {
        let actions = line.split('=');
        if (actions[0] === 'Add') {
            let userName = actions[1];
            let sent = Number(actions[2]);
            let received = Number(actions[3]);
            if (!messages.hasOwnProperty(userName)) {
                messages[userName] = {sent: 0, received: 0};
                messages[userName].sent = sent;
                messages[userName].received = received;
            }
        } else if (actions[0] === 'Message') {
            let sender = actions[1];
            let receiver = actions[2];
            if (messages.hasOwnProperty(sender) && messages.hasOwnProperty(receiver)) {
                messages[sender].sent += 1;
                messages[receiver].received += 1;
                if (messages[sender].sent + messages[sender].received >= capacity) {
                    console.log(`${sender} reached the capacity!`);
                    delete messages[sender];
                }
                if (messages[receiver].sent + messages[receiver].received >= capacity) {
                    console.log(`${receiver} reached the capacity!`);
                    delete messages[receiver];
                }
            }
        } else if (actions[0] === 'Empty') {
            let userName = actions[1];
            if (messages.hasOwnProperty(userName)) {
                delete messages[userName];
            }
            if (userName === 'All') {
                for (let user of Object.keys(messages)) {
                    delete messages[user];
                }
            }
        }
    }

    let countOfUsers = Object.keys(messages).length;

    console.log(`Users count: ${countOfUsers}`);

    let sorted = Object.entries(messages).sort(compare);

    function compare(a, b) {
        return b[1].received - a[1].received || a[0].localeCompare(b[0]);
    }

    for (let [user, value] of sorted) {
        value = messages[user].sent + messages[user].received;
        console.log(`${user} - ${value}`);
    }
}