initEvents(){

    this.btnNewFolder.addEventListener('click', e=>{

        let name = prompt('Nome da nova pasta:');

        if(name){

            this.getFirebaseRef().push().set({
                name,
                type: 'folder',
                path: this.currentFolder.join('/')


            })
        }
    });

    this.btnDelete.addEventListener('click', e=>{

        this.removeTask().then(responses=>{

            responses.forEach(response=>{

                if(response.field.key){

                    this.getFirebaseRef().child(response.field.key).remove();
                }

            });

        }).catch(err=>{

            console.error(err);

        });

    });

    this.btnRename.addEventListener('click', e =>{

        let li = this.getSelection()[0];

        let file = JSON.parse(li.dataset.file);

        let name = prompt("Renomear o arquivo:", file.name);

        if(name){

            file.name = name;

            this.getFirebaseRef().child(li.dataset.file).set(file);
        }

    });

    this.listFilesEl.addEventListener('selectionchange', e=>{

        switch (this.getSelection().length){

            case 0 :
                this.btnDelete.style.display = 'none';
                this.btnRename.style.display = 'none';
            break;

            case 1 :
                this.btnDelete.style.display = 'block';
                this.btnRename.style.display = 'block';
            break;

            default:
                this.btnDelete.style.display = 'block';
                this.btnRename.style.display = 'none';
        }

    });

    this.btnSendFileEl.addEventListener('click', event => {

        this.inputFilesEl.click();

    });

li.addEventListener('dblclick', e=>{

        let file = JSON.parse(li.dataset.file);

        switch(file, type){

            case 'folder':
                this.currentFolder.push(file.name);
                this.openFolder();
                break;
                default:
                    window.open(file.path);

        }
    });