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SyntaxError: Unexpected token in Angular

I want to add my website a user's profile updater. But when I try to open user's profile in my website, I have that error in Angular:
main.ts:6 ERROR SyntaxError: Unexpected token 'e', "eyJhbGciOi"... is not valid JSON
at JSON.parse (<anonymous>)
at LocalStorageService.getItem (local-storage.service.ts:17:22)
at get getDecodedToken [as getDecodedToken] (auth.service.ts:39:42)
at get getCurrentUserId [as getCurrentUserId] (auth.service.ts:44:29)
at UserComponent.getUserById (user.component.ts:51:51)
at UserComponent.ngOnInit (user.component.ts:28:10)
at callHook (core.mjs:2752:22)
at callHooks (core.mjs:2721:17)
at executeInitAndCheckHooks (core.mjs:2672:9)
at refreshView (core.mjs:12084:21)`
My local-storage.service.ts:
import { Injectable } from '#angular/core';
#Injectable({
providedIn: 'root'
})
export class LocalStorageService {
constructor() { }
setItem(key:string, value:any){
let json = JSON.stringify(value);
localStorage.setItem(key, json);
}
getItem(key:string){
let json = localStorage.getItem(key);
let value = JSON.parse(json);
return value;
}
isSaved(key: string) {
if (localStorage.getItem(key)) {
return true;
}
return false;
}
remove(key: string) {
localStorage.removeItem(key);
}
removeAll() {
localStorage.clear();
}
}
auth.service.ts:
`import { HttpClient } from '#angular/common/http';
import { Injectable } from '#angular/core';
import { LoginModel } from '../models/loginModel';
import { SingleResponseModel } from '../models/singleResponseModel';
import { TokenModel } from '../models/tokenModel';
import { LocalStorageService } from './local-storage.service';
import { UserPasswordModel } from '../models/userPasswordModel';
import { ResponseModel } from '../models/responseModel';
import { JwtHelperService } from '#auth0/angular-jwt';
#Injectable({
providedIn: 'root'
})
export class AuthService {
apiUrl="https://localhost:5001/api/auth/";
public jwtHelperService: JwtHelperService = new JwtHelperService();
constructor(private httpClient:HttpClient,
private localStorageService:LocalStorageService) {}
login(user:LoginModel){
return this.httpClient.post<SingleResponseModel<TokenModel>>(this.apiUrl+"login", user);
}
isAuthenticated(){
if (localStorage.getItem("token")) {
return true;
}else{
return false;
}
}
updatePassword(userPasswordModel:UserPasswordModel){
let newUrl = this.apiUrl + "updatepassword";
return this.httpClient.post<ResponseModel>(newUrl, userPasswordModel)
}
get getDecodedToken() {
let token = this.localStorageService.getItem("token");
return this.jwtHelperService.decodeToken(token);
}
get getCurrentUserId() {
let decodedToken = this.getDecodedToken;
let userIdString = Object.keys(decodedToken).filter((t) =>
t.endsWith('/nameidentifier')
)[0];
let userId: number = decodedToken[userIdString];
return userId;
}
}
user.component.ts:
import { Component, OnInit } from '#angular/core';
import { FormBuilder, FormGroup, Validators } from '#angular/forms';
import { ToastrService } from 'ngx-toastr';
import { User } from 'src/app/models/user';
import { AuthService } from 'src/app/services/auth.service';
import { ProfileService } from 'src/app/services/profile.service';
#Component({
selector: 'app-user',
templateUrl: './user.component.html',
styleUrls: ['./user.component.css']
})
export class UserComponent implements OnInit {
user:User;
profileForm:FormGroup;
passwordForm:FormGroup;
dataLoaded = false;
constructor(
private userService:ProfileService,
private authService:AuthService,
private formBuilder:FormBuilder,
private toastrService:ToastrService
) { }
ngOnInit(): void {
this.getUserById();
this.createProfileForm();
this.createPasswordForm();
}
createProfileForm(){
this.profileForm = this.formBuilder.group({
id:[Number(this.authService.getCurrentUserId)],
firstName: ["",Validators.required],
lastName:["",Validators.required]
})
}
createPasswordForm(){
this.passwordForm = this.formBuilder.group({
userId:[Number(this.authService.getCurrentUserId)],
oldPassword: ["",Validators.required],
newPassword:["",Validators.required],
repeatNewPassword:["",Validators.required]
})
}
getUserById(){
this.userService.getUserById(this.authService.getCurrentUserId)
.subscribe(response=>{
this.user = response.data
this.dataLoaded = true
});
}
updateUserNames(){
if (this.profileForm.valid) {
let userModel = Object.assign({}, this.profileForm.value);
this.userService.updateUserNames(userModel).subscribe(response=>{
this.toastrService.info(response.message, "Bilgiler Güncellendi.");
setTimeout(() => {
window.location.reload();
}, 1000);
}, responseError=>{
console.log(responseError);
this.toastrService.error(responseError.error, "Hata!");
});
} else {
this.toastrService.error("Lütfen tüm alanları doldurunuz.", "Hata!");
}
}
updatePassword(){
if (this.passwordForm.valid) {
let passwordModel = Object.assign({}, this.passwordForm.value);
console.log(passwordModel);
this.authService.updatePassword(passwordModel).subscribe(response=>{
this.toastrService.info(response.message, "Şifre Güncellendi");
}, responseError=>{
this.toastrService.error(responseError.error, "Hata!");
});
} else {
this.toastrService.error("Lütfen tüm alanları doldurunuz.", "Hata!");
}
}
}
How can I fix this error? Thanks. I tried lots of thins, but no-one helped me.
I am trying to add a user's profile updater. But this error...

As the error says; Unexpected token 'e', "eyJhbGciOi"... is not valid JSON. You are trying to parse a plain string represents token itself, not a valid string represents a json object.. Therefore it fails when trying to parse it.
Either update the code where you directly store your token as string on your local storage or just use localStorage.getItem('token') without parsing.

LocalStorage not displaying array of todolist after refreshing page

I'm currently developing a ToDo List using Angular 8. When I enter in a task for my ToDo list it saves it in the Localstorage but when I refresh my page my tasks are gone but are still stored inside the localstorage of the browser.
How do I keep my tasks from disappearing after refreshing the browser, when they're still saved in LocalStorage?
import { Component, OnInit } from '#angular/core';
import { ToDo, IToDo } from './todo.model';
import { HttpClient } from '#angular/common/http';
import { LocalStorageService } from '../localStorageService';
import { ActivatedRoute, Router } from '#angular/router';
import { IUser } from '../login/login.component';
import { ToastService } from '../toast/toast.service';
#Component({
// tslint:disable-next-line: component-selector
selector: 'todolist',
templateUrl: './todo.component.html',
styleUrls: ['./todo.component.css']
})
export class ToDoComponent implements OnInit {
todos: Array<IToDo> = [];
inputtask = "";
toDoParams = '';
localStorageService: LocalStorageService<IToDo>;
currentUser: IUser;
modal: any;
constructor(
private http: HttpClient,
private activatedRoute: ActivatedRoute,
private router: Router) {
this.localStorageService = new LocalStorageService('todos');
}
private toastService: ToastService;
async ngOnInit() {
const currentUser = this.localStorageService.getItemsFromLocalStorage('user');
console.log('from todos component', currentUser);
if (currentUser == null) {
this.router.navigate(['login']);
}
}
// Creating a to do item by clicking on the Enter Button
addToDo(todo: string) {
const td = {
id: 1,
task: todo,
editing: false
}
if (todo === '') {
alert('You must enter in a task TO DO!')
} else {
this.todos.push(td);
}
this.saveItemsToLocalStorage(this.todos);
}
delete(index: number) {
this.todos.splice(index, 1);
console.log("index", index);
this.saveItemsToLocalStorage(this.todos);
}
clear() {
this.todos = [];
console.log('index', this.todos)
this.saveItemsToLocalStorage(this.todos);
}
getItemsFromLocalStorage(key: string) {
const savedToDo = JSON.parse(localStorage.getItem(key));
console.log('from getItemsFromLocalStorage savedItems', savedToDo);
return this.localStorageService.getItemsFromLocalStorage(key);
return savedToDo;
}
saveItemsToLocalStorage(todos: Array<IToDo>) {
todos = this.sortByID(todos);
return this.localStorageService.saveItemsToLocalStorage(todos);
const savedToDo = localStorage.setItem('todos', JSON.stringify(todos));
console.log('from saveItemsToLocalStorage savedToDos: ', savedToDo);
return savedToDo;
}
sortByID(todos: Array<IToDo>) {
todos.sort((prevToDo: IToDo, presToDo: IToDo) => {
return prevToDo.id > presToDo.id ? 1 : -1;
});
console.log('the sorted ToDos', this.todos);
return this.todos;
}
logout() {
// clear localStorage
this.localStorageService.clearItemFromLocalStorage();
// navigate to login page
this.router.navigate(['']);
}
}
Here is the LocalStorageService file below
export class LocalStorageService<T> {
constructor(private key: string) {
}
saveItemsToLocalStorage(todos: Array<T> | T) {
const savedToDos = localStorage.setItem(this.key, JSON.stringify(todos));
console.log('from saveItemsToLocalStorage savedToDos: ', savedToDos);
return savedToDos;
}
getItemsFromLocalStorage(key?: string) {
let savedItems;
if (key != null) {
const items = null;
savedItems = JSON.parse(localStorage.getItem(key));
console.log('from getItemFromLocalStorage key: ', key, 'savedItems: ', savedItems);
} else {
savedItems = JSON.parse(localStorage.getItem(this.key));
}
return savedItems;
}
clearItemFromLocalStorage(key?: string) {
if (key != null) {
const items = null;
localStorage.setItem(key, JSON.stringify(items));
} else {
localStorage.clear();
}
}
}

Hey so when the page reloads angular loses context of the view so it has to render it again. You have all the working code here to make it work you just have to change the ngOnInit page load event so it reads them again and binds them to the property so angular can show them in the UI. Also bare in mind you call clearItemFromLocalStorage on logout so this won't grab them if they logout and then log back in, but i guess that was expected due to the code you have wrote.
The below should slot in and work for you:
async ngOnInit() {
const currentUser = this.localStorageService.getItemsFromLocalStorage('user');
console.log('from todos component', currentUser);
if (currentUser == null) {
await this.router.navigate(['login']);
} else {
// if user is logged in go and find any items from local storage and bind
// to the view
const toDoItems = this.localStorageService.getItemsFromLocalStorage('todos');
if (toDoItems && Array.isArray(toDoItems)) {
this.todos = toDoItems;
}
}
}

error TS2559: Type 'BookInterface[]' has no properties in common with type 'BookInterface'

Dear I am developing a page with Angular 7 and I am presented with the error TS2559: Type 'BookInterface[]' has no properties in common with type 'BookInterface', I have changed the code but I still can not find the solution, I leave the code below, the error is thrown in the method getListBooks(): this is my file list-books.component.ts
import { BookInterface } from './../../../models/book';
import { DataApiService } from './../../../services/data-api.service';
import { Component, OnInit } from '#angular/core';
import {NgForm} from '#angular/forms';
#Component({
selector: 'app-list-book',
templateUrl: './list-book.component.html',
styleUrls: ['./list-book.component.css']
})
export class ListBookComponent implements OnInit {
constructor(private dataApi: DataApiService) { }
private books: BookInterface = {};
ngOnInit() {
this.getListBooks();
}
getListBooks() {
this.dataApi.getAllBooks().subscribe(books => {
this.books = books;
});
}
onDelete() {
console.log('LIBRO ELIMINADO');
}
}
I also leave the code of my data-api.service.ts from where I call the interface
import { map } from 'rxjs/operators';
import { Observable } from 'rxjs/internal/Observable';
import { Injectable } from '#angular/core';
import { AngularFirestore, AngularFirestoreCollection, AngularFirestoreDocument } from '#angular/fire/firestore';
import { BookInterface } from '../models/book';
#Injectable({
providedIn: 'root'
})
export class DataApiService {
constructor(private afs: AngularFirestore) {
this.bookCollecction = afs.collection<BookInterface>('books');
this.books = this.bookCollecction.valueChanges();
}
private bookCollecction: AngularFirestoreCollection<BookInterface>;
private books: Observable<BookInterface[]>;
private bookDoc: AngularFirestoreDocument<BookInterface>;
private book: Observable<BookInterface>;
getAllBooks() {
return this.books = this.bookCollecction.snapshotChanges()
.pipe(map( changes => {
return changes.map( action => {
const data = action.payload.doc.data() as BookInterface;
data.id = action.payload.doc.id;
return data;
});
}));
}
// metodo que trae un libro a traves de su id
getOneBook(idBook: string) {
this.bookDoc = this.afs.doc<BookInterface>(`books/${idBook}`);
return this.book = this.bookDoc.snapshotChanges().pipe(map(action => {
if (action.payload.exists === false){
return null;
} else {
const data = action.payload.data() as BookInterface;
data.id = action.payload.id;
return data;
}
}));
}
addBook(book: BookInterface): void {
this.bookCollecction.add(book);
}
updateBook(book: BookInterface): void {
let idBook = book.id;
this.bookDoc = this.afs.doc<BookInterface>(`books/${idBook}`);
this.bookDoc.update(book);
}
deleteBook(idBook: string): void {
this.bookDoc = this.afs.doc<BookInterface>(`books/${idBook}`);
this.bookDoc.delete();
}
}
The version of typescript that I am currently using is Version 2.7.2, but also update it without solving the problem

You need to change the following:
private books: BookInterface = {};
to:
private books: BookInterface[] = [];

Shared service example Angular 5

I know this question has been asked several times, but problem is that nobody tried to make a some fiddle or show results of code. This is what i have, i need to update values in other component based on value in some other component, but that is not just value,I have call function again in some other component.
I have some component that goes to database and update values, on second hand I have other component that read those values from database from service.
This is example of my code
tasks.service.ts
import { Injectable } from '#angular/core';
import { HttpClient } from '#angular/common/http';
import { Observable } from 'rxjs';
import 'rxjs/add/operator/catch';
import 'rxjs/add/operator/map';
import { environment } from '../../environments/environment';
import { Tasks } from './tasks';
#Injectable()
export class TasksProvider {
constructor(private http: HttpClient) { }
createNewTask(name: Name) : Observable<any> {
return this.http.post(environment.apiUri + 'tasks', { name, finished: false },
{ responseType: 'text' });
}
updateTask(id: Id, name: Name, finished: boolean) : Observable<any> {
return this.http.put(environment.apiUri + 'tasks/' + id, { name, finished },
{ responseType: 'text' });
}
getAllTasks(): Observable<Tasks[]> {
return this.http.get(environment.apiUri + 'tasks')
.map<any, Tasks[]>(data => data.map(Tasks.fromObject));
}
}
app.component.html
<app-tasks-list></app-tasks-list>
<app-tasks-add-new></app-tasks-add-new>
As you may see I have not child components, that is my main problem
tasks-list.component.ts
import {Component} from '#angular/core';
import { Tasks } from '../services/tasks';
import { TasksProvider } from '../services/tasks.service';
#Component({
selector: 'app-tasks-list',
templateUrl: './tasks-list.component.html',
styleUrls: ['./tasks-list.component.scss']
})
export class TasksListComponent {
tasks: Array<Tasks>;
constructor(private tasksProvider: TasksProvider) { }
ngOnInit() {
this.getTasksList();
}
displayedColumns: string[] = ['id', 'name', 'finished'];
private getTasksList() {
this.tasksProvider.getAllTasks()
.subscribe(tasks => {
this.tasks = tasks;
});
}
public updateCheckboxValue(id: number, name: string, event: any){
this.tasksProvider.updateTask(id, name, event.checked).subscribe(
result => {},
() => {
alert('Something went wrong');
})
}
}
tasks-add-new.component.ts
import { Component, OnInit, Inject } from '#angular/core';
import { MatDialog, MatDialogRef, MAT_DIALOG_DATA } from '#angular/material';
import { Tasks } from '../services/tasks';
import { TasksProvider } from '../services/tasks.service';
export interface DialogData {
name: string;
}
#Component({
selector: 'app-tasks-add-new',
templateUrl: './tasks-add-new.component.html',
styleUrls: ['./tasks-add-new.component.scss']
})
export class TasksAddNewComponent implements OnInit {
ngOnInit() {
}
constructor(public dialog: MatDialog, private tasksProvider: TasksProvider) {}
openDialog(): void {
const dialogRef = this.dialog.open(TasksAddNewDialog, {
width: '250px',
data: {name: this.animal}
});
dialogRef.afterClosed().subscribe(result => {
this.name = result
this.tasksProvider.createNewTask(this.name).subscribe(
result => {},
() => {
alert('Something went wrong');
})
}
}
}
#Component({
selector: 'tasks-add-new-dialog',
templateUrl: 'tasks-add-new-dialog.html'
})
export class TasksAddNewDialog {
constructor(
public dialogRef: MatDialogRef<TasksAddNewDialog>,
#Inject(MAT_DIALOG_DATA) public data: DialogData) {}
onNoClick(): void {
this.dialogRef.close();
}
}
You see now when i call function in tasks-add-new.component.ts like
this.tasksProvider.createNewTask(this.name).subscribe(
result => {},
() => {
alert('Something went wrong');
})
I need to call again function in tasks-list.component.ts
private getTasksList() {
this.tasksProvider.getAllTasks()
.subscribe(tasks => {
this.tasks = tasks;
});
}
Does any body have idea how i can do that the best practice?

On of the possible approach is to use Subjects.
1) Store task list on the service and provide subscribable Subject
private tasks: Array<Task>;
public $tasks: BehaviorSubject<Array<Task>>;
constructor(private http: HttpClient) {
this.$tasks = new BehaviorSubject([]);
...
}
getAllTasks() {
this.http.get(environment.apiUri + 'tasks')
.subscribe(data => {
this.tasks = data;
this.$tasks.next(this.tasks);
});
}
updateTask(params) {
this.http.post(/* params */).subscribe((task) => {
this.tasks = this.tasks.map(t => t.id !== task.id ? t : task);
this.$tasks.next(this.tasks);
});
}
createTask(...) {
// again, do a request, update this.tasks and call $tasks.next
...
}
2) Make one service Subject subscription on the component instead of multiple service methods Observable listeners and update component's list automatically each time the service source has been changed
tasks: Array<Tasks>;
constructor(private tasksProvider: TasksProvider) {
this.tasksProvider.$tasks.subscribe(tasks => this.tasks = tasks);
}
ngOnInit() {
this.tasksProvider.getAllTasks();
}
public updateCheckboxValue(id: number, name: string, event: any){
this.tasksProvider.updateTask(id, name, event.checked);
}

Required share function for json fetch images in ionic 3 with capacitor

I am making wallpaper app using ionic 3 with capacitor, I want to download and share function in my app which performs the share/download images.
My images are fetched from json data,
Please someone help me with that. Below is my code which I have checked.
I write the code to fetch the Pixabay site images using API, I want the Image Share Function.
This project is Build Ionic with Capcitor which give us the Native app.
Provider:
import { Http } from '#angular/http';
import { Injectable } from '#angular/core';
import 'rxjs/add/operator/map';
#Injectable()
export class ImgProvider {
key: string = 'API-KEY';
//search: string = 'quotes';
url = 'https://pixabay.com/api/?key=';
constructor(public http: Http) { }
public getimages(query:any){
return this.http.get(this.url + this.key+ "&q=" +query+ "&image_type=photo")
.map(res => res.json());
}
}
Contact.ts code:
import { Component } from '#angular/core';
import { NavController, LoadingController, ActionSheetController } from 'ionic-angular';
import { ImageViewerController } from 'ionic-img-viewer';
import { Http } from '#angular/http';
import { ImgProvider } from '../../providers/img/img';
import 'rxjs/add/operator/map';
import { SocialSharing } from '#ionic-native/social-sharing';
import { FileTransfer, FileTransferObject } from '#ionic-native/file-transfer';
import { Platform } from 'ionic-angular/platform/platform';
import { File } from '#ionic-native/file';
declare var cordova: any;
#Component({
selector: 'page-contact',
templateUrl: 'contact.html',
providers: [ImgProvider]
})
export class ContactPage {
posts = {};
search = {
params: 'nature'
};
_imageViewerCtrl: ImageViewerController;
constructor(
public navCtrl: NavController,
private transfer: FileTransfer,
imageViewerCtrl: ImageViewerController,
public http: Http,
private file: File,
public platform : Platform,
private socialSharing: SocialSharing,
public Provider: ImgProvider,
private actionSheetController: ActionSheetController,
public loadingController:LoadingController) {
this.Provider.getimages;
}
ionViewDidLoad(){
let postsLoadingController = this.loadingController.create({
content: "getting your images from server"
});
postsLoadingController.present();
this.Provider.getimages(this.search.params)
.subscribe((data) => {
postsLoadingController.dismiss();
this.posts = data
});
}
presentImage(myImage) {
const imageViewer = this._imageViewerCtrl.create(myImage);
imageViewer.present();
setTimeout(() => imageViewer.dismiss(), 1000);
imageViewer.onDidDismiss(() => alert('Viewer dismissed'));
}
doRefresh(refresher) {
this.Provider.getimages; // calls the getimages method
setTimeout(() => {
refresher.complete(); // stops the refresher 2 seconds after retrieving the data
}, 2000);
}
compileimg(index):string{
var img = this.posts[index].image ;
return img.concat(" \n sent from my awesome app");
}
regularShare(index){
var img = this.compileimg(index);
this.socialSharing.share(null, null, img, null);
}
whatsappShare(index){
var img = this.compileimg(index);
this.socialSharing.shareViaWhatsApp(null, img, null);
}
shareVia(post){
let shareViaActionSheet = this.actionSheetController.create({
title:"Share Image",
buttons:[
{
text:"Share",
icon:"share",
handler:()=> {
this.socialSharing.share(post.type,"", post.image, post.pageURL)
}
},
{
text:"Cancel",
role:"destructive"
}
]
});
shareViaActionSheet.present();
}
swipe(event) {
if(event.direction === 4) {
this.navCtrl.parent.select(1);
}
}
}