Friend List

function friendList(input){
   let listsOfFriends = input.shift().split(', ');
   let blackListCount = 0;
   let lostListCount = 0;
   for(let i = 0;i < input.length;i++){
     let commands = input[i].split(' ');
     let command = commands[0];


     if(command === 'Report'){
       break;
     }

     if(command === 'Blacklist'){
        let names = commands[1];

        if(listsOfFriends.includes(names)){
          let index = listsOfFriends.indexOf(names);
          listsOfFriends.splice(index,1,'Blacklisted');
          console.log(`${names} was blacklisted.`);
          blackListCount++;

        }else{
          console.log(`${names} was not found.`)
        }
     }

     if(command === 'Error'){
        let nameIndex = listsOfFriends[Number(commands[1])];

        if(nameIndex !== 'Blacklisted' && nameIndex !== 'Lost'){
          let index = listsOfFriends.indexOf(nameIndex);
          listsOfFriends.splice(index,1,'Lost');
          console.log(`${nameIndex} was lost due to an error.`);
          lostListCount++;
        }
     }

     if(command === 'Change'){
       let index = Number(commands[1]);
       let newName = commands[2];
       let currentName = listsOfFriends[index];

       if(listsOfFriends.length >= index && index >= 0){
         listsOfFriends.splice(index,1,newName);
         console.log(`${currentName} changed his username to ${newName}.`)
       }
     }

   }
   console.log(`Blacklisted names: ${blackListCount}`);
   console.log(`Lost names: ${lostListCount}`);
   console.log(listsOfFriends.join(' '));
}

// friendList([

// 'Mike, John, Eddie',
// 'Blacklist Mike',
// 'Error 0',
// 'Error 1',
// 'Change 2 Mike123',
// 'Report'

// ])

friendList([
  'Mike, John, Eddie, William',
  'Error 3',
  'Error 3',
  'Change 0 Mike123',
  'Blacklist Eddie',
  'Report'
]);