03. Nikulden’s meals (Final Exam 071219)

function solve(input){

let guests = {};
let unlikeCount = 0;

for (const line of input) {
    if(line === 'Stop'){
        break;
    }
    let [reaction, name, meal] = line.split('-');

    switch(reaction){
        case 'Like':
            if(!guests.hasOwnProperty(name)){
                guests[name] = [];
                guests[name].push(meal);
            }else{
                if(!guests[name].includes(meal)){
                    guests[name].push(meal);
                }
            }
            break;

        case 'Unlike':
            if(!guests.hasOwnProperty(name)){
                console.log(`${name} is not at the party.`);
            }else{
                let index = guests[name].indexOf(meal);
                if(index > -1){
                     guests[name].splice(index,1);
                     console.log(`${name} doesn't like the ${meal}.`);
                     unlikeCount++;
                }else{
                    console.log(`${name} doesn't have the ${meal} in his/her collection.`);
                }
            }

            break;
    }

}

    Object.entries(guests)
    .sort((a,b)=>{
        if(b[1].length === a[1].length){
            return a[0].localeCompare(b[0]);
        }
            return b[1].length - a[1].length;
    }).forEach(pair=>{
        let name = pair[0];
        let list = pair[1]
        console.log(`${name}: ${list.join(', ')}`);

    });
    console.log(`Unliked meals: ${unlikeCount}`);

}