6. System Components

function components(arr) {
  let map=new Map();
  for (let line of arr){
    let [system,component,subcomponent] = line.split(' | ').filter(e=>e!='');

    if(!map.has(system)){
      map.set(system,new Map());
    }

    if (!map.get(system).has(component)){
      map.get(system).set(component,new Array());
    }

    let subcomponents=map.get(system).get(component);
    subcomponents.push(subcomponent);
    map.get(system).set(component,subcomponents);
  }

  [...map].sort(sortSystems).forEach(([system,components])=>{
    console.log(system);
    [...components].sort((a,b) => a.length - b.length).forEach(([component,subcomponents])=> {
      console.log(`|||${component}`)
      subcomponents.forEach(sc => console.log(`||||||${sc}`))
    })
  });

  function sortSystems(a,b){
    if ([...a[1]].length > [...b[1]].length){
      return -1;
    } else if ([...a[1]].length < [...b[1]].length){
      return 1;
    } else {
      if (a[0] < b[0]){
        return -1;
      }else if(a[0] > b[0]){
        return 1;
      }else {
        return 0;
      }
    }
  }
}