function articleSort(articles, mode = 'byDate') {
    let sortArray = [];
    switch(mode) {
      case 'byDate':
        for (let id in articles) {
          let timeStamp = articles[id]['Alter'];
          sortArray.push({[timeStamp]: articles[id]})
        }
        sortArray.sort((a,b) => Date.parse(b) - Date.parse(a));
        let dateSortArray = [];
        for (let sortId in sortArray) {
          let objName = Object.keys(sortArray[sortId])[0]
          dateSortArray.push(sortArray[sortId][objName]);
        }
        articles = dateSortArray;
        break;  
      case 'byPrio':
        sortArray = [];
        let sortArray2 = [];
        let sortArray3 = [];
        for (let id in articles) {
          if (articles[id]['prio'] == 'pinned') {
            sortArray.push(articles[id])
          } else if (articles[id]['prio'] == 'important') {
            sortArray3.push(articles[id])
          } else {
            sortArray2.push(articles[id]);       
          }
        }
        let sortArrayPrio = sortArray.concat(sortArray3);
        articles = sortArrayPrio.concat(sortArray2);
        break;
      case 'byPlace':
        break;
      case 'byKind':
        break;
    }
    return articles
  }

  export default articleSort;