Associative Arrays - More Exercise - Problem 5 - SoftUni Students

function solve(arr) {
    let listOfCourses = {};

    for (let element of arr) {
        if (!element.includes(`[`)) {
            let [courseName, capacity] = element.split(`: `);
            if (!listOfCourses.hasOwnProperty(courseName)) {
                listOfCourses[courseName] = {
                    capacity: Number(capacity),
                    students: {},
                }
            } else {
                listOfCourses[courseName].capacity += Number(capacity);
            }
        } else if (element.includes(`with email`)) {
            element = element.split(`[`);
            let userName = element.shift();
            element = element[0].split(`]`);
            let creditCount = Number(element.shift());
            let temp = element[0].split(` `);
            let email = temp[3];
            let courseName = element[0].split(` joins `)[1];
            if (listOfCourses.hasOwnProperty(courseName) && listOfCourses[courseName].capacity > 0) {
                listOfCourses[courseName].students[userName] = {
                    creditCount: creditCount,
                    email: email,
                }
                listOfCourses[courseName].capacity--;
            }
        }
    }
    let sortedByCapacity = Object.entries(listOfCourses)
        .sort((a, b) => Object.keys(b[1].students).length - Object.keys(a[1].students).length);
    for (let element of sortedByCapacity) {
        console.log(`${element[0]}: ${element[1].capacity} places left`);
        Object.entries(element[1].students)
            .sort((a, b) => b[1].creditCount - a[1].creditCount)
            .forEach(x => {
                console.log(`--- ${x[1].creditCount}: ${x[0]}, ${x[1].email}`)
            });
    }
}