Sup_File/src/app/book/book.component.ts

import { Component, OnInit, OnDestroy } from '@angular/core';
import { HttpClient, HttpHeaders } from '@angular/common/http';
import { Router, ActivatedRoute } from '@angular/router';
import { Observable } from 'rxjs/Observable';
import { tap, catchError } from 'rxjs/operators';
import { of } from 'rxjs/observable/of';
import {Http} from "@angular/http";
import {Form} from "@angular/forms";
import * as formData from 'form-data';

@Component({
  selector: 'app-book',
  templateUrl: './book.component.html',
  styleUrls: ['./book.component.css']
})
export class BookComponent implements OnInit, OnDestroy {
  currentUser: any;
  allUserFile: any;
  allUserFolder: any;
  mainFolder: any;
  books: any;
  filesToUpload: Array<File>;
  fileChooseName: string;
  httpOptions: any;
  isClickCreateFolder: boolean;
  inputCreateFolder: String;

  constructor(private http: HttpClient, private router: Router, private route: ActivatedRoute) {
    this.isClickCreateFolder = false;
    this.fileChooseName = 'None';
    this.filesToUpload = [];
  }

  ngOnInit() {
      this.httpOptions = {
        headers: new HttpHeaders({ 'Authorization': localStorage.getItem('jwtToken') }),
        pathFolder: ''
      };

      this.http.get('/api/getCurrentUser', this.httpOptions).subscribe(user => {
        this.currentUser  = user;
        this.openFolder('Home');
      }, err => {
        if (err.status === 401) {
          this.router.navigate(['login']);
        }
      });
  }

    deleteFile(fileToDelete) {
        this.http.post('/api/deleteFileMongo', fileToDelete).subscribe(file => {
            console.log('deletteeeee file : ' + JSON.stringify(file));
            console.log('deletteeeee file this.mainFolder.path: ' + this.mainFolder.path.toString());

            this.openFolder(this.mainFolder.path);
            // if (file) {
            //     this.allUserFile = file;
            // } else {
            //     this.allUserFile = [];
            // }
        });
    }

    deleteFolder(folderToDelete) {
        this.http.post('/api/deleteFolderMongo', folderToDelete).subscribe(folder => {
            console.log('deletteeeee folder : ' + JSON.stringify(folder));
            console.log('deletteeeee folder this.mainFolder.path: ' + this.mainFolder.path.toString());

            this.openFolder(this.mainFolder.path);
            // if (file) {
            //     this.allUserFile = file;
            // } else {
            //     this.allUserFile = [];
            // }
        });
    }
  getfiles() {
      this.http.post('/api/getFileList', {mainPath : this.mainFolder.path, owner: this.currentUser.username.toString()}).subscribe(files => {
          if (files) {
              this.allUserFile = files;
          } else {
              this.allUserFile = [];
          }
      });
  }

  getfolders() {
      this.http.post('/api/getFolderList', {mainPath : this.mainFolder.path, owner: this.currentUser.username.toString()}).subscribe(folders => {
          if (folders) {
              this.allUserFolder = folders;
          } else {
              this.allUserFolder = [];
          }

      });
  }

  backToParentFolder(){
      this.openFolder(this.mainFolder.parent);
  }


  openFolder(path: String) {
      this.httpOptions.pathFolder = path;

      this.isClickCreateFolder = false;

      this.http.post('/api/getMainFolder', {path: path, owner: this.currentUser.username.toString()}).subscribe(folder => {
          if (folder) {
              this.mainFolder = folder;
              this.getfolders();
              this.getfiles();
          } else {
              if (path === 'Home'){
                  this.http.post('api/createFolder', { name: 'Home', parent: '', path: 'Home', taille: 'taiile', idUser: this.currentUser._id.toString(), fileList: [], folderList: [], owner: this.currentUser.username.toString() }).subscribe(resp => {
                      this.mainFolder = resp;
                  }, err => {
                      console.log('errrrr folllder : ' + err);
                  });


              }
          }
      });
  }

  createBool() {
      this.isClickCreateFolder = true;
  }

  createFolder() {
      var newPath = this.mainFolder.path + '/' + this.inputCreateFolder;
      this.isClickCreateFolder = false;

      this.http.post('api/createFolder', { name: this.inputCreateFolder.toString(), parent: this.mainFolder.path, path: newPath.toString(), taille: 'taiile', idUser: this.currentUser._id.toString(), fileList: [], folderList: [], owner: this.currentUser.username.toString() }).subscribe(resp => {
          this.getfolders();
      }, err => {
          console.log('errrrr folllder : ' + err);
      });
  }

  ngOnDestroy() {
    localStorage.removeItem('jwtToken');
    this.httpOptions = null;
    this.currentUser  = null;
  }

  upload() {
      if(this.mainFolder !== undefined){
          this.http.post('api/uploadFileMongo', { name: this.fileChooseName.toString(), path: this.mainFolder.path.toString(), extention: this.filesToUpload[0].type.toString(), taille: this.filesToUpload[0].size.toString(), idUser: this.currentUser._id.toString(), owner: this.currentUser.username.toString(), lastDate: Date.now().toString() }).subscribe(resp => {
              this.makeFileRequest('http://localhost:3000/api/upload', [], this.filesToUpload, resp).then((result) => {
                  this.getfiles();
                  this.filesToUpload = null;
                  this.fileChooseName = 'None';
              }, (error) => {
                  console.error(error);
              });
          }, err => {
              console.error(err);
          });
      }

  }

  fileChangeEvent(fileInput: any){
    this.filesToUpload = <Array<File>> fileInput.target.files;
    this.fileChooseName = this.filesToUpload[0].name;
  }

  makeFileRequest(url: string, params: Array<string>, files: Array<File>, monFile: any) {
    return new Promise((resolve, reject) => {
      var formData: any = new FormData();
      var xhr = new XMLHttpRequest();

      formData.append("public[]", files[0], monFile._id);
      xhr.onreadystatechange = function () {
        if (xhr.readyState == 4) {
          if (xhr.status == 200) {
            resolve(JSON.parse(xhr.response));
          } else {
            reject(xhr.response);
          }
        }
      };

      xhr.open("POST", url, true);
      xhr.send(formData);
    });
  }

}