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import { Component, OnInit } from '@angular/core';
import { Title } from '@angular/platform-browser';
import { Router } from '@angular/router';
import { User } from 'src/models/identity/user';
import { UserService } from '../../services/user.service';
import { AppConstants } from 'src/app/app-constants.module';
import { HttpErrorResponse } from '@angular/common/http';
import { FeedService } from 'src/app/services/feed.service';
import { Post } from 'src/models/post';
import { FormBuilder, FormControl, FormGroup } from '@angular/forms';
import { PostService } from 'src/app/services/post.service';
import { TokenService } from 'src/app/services/token.service';
@Component({
selector: 'app-feed',
templateUrl: './feed.component.html',
styleUrls: ['./feed.component.css']
})
export class FeedComponent implements OnInit {
private _title = 'Feed';
private _timeLoaded: string; // we send the time to the api as a string
private _currentPage: number;
public dataArrived = false;
public user: User;
public posts: Post[];
public createPostFormGroup: FormGroup;
public files: File[];
constructor(private _titleService: Title, private _fb: FormBuilder, private _router: Router, private _userService: UserService, private _feedService: FeedService, private _postService: PostService, private _tokenService: TokenService) {
this._titleService.setTitle(this._title);
}
ngOnInit(): void {
if (!this._tokenService.getTokenFromSessionStorage()) {
this._router.navigate(['/login']);
return;
}
this._currentPage = 1;
this.posts = [];
this.user = this._userService.getDefaultUser();
this.files = [];
const now = new Date();
now.setHours(now.getHours() + 2); // accounting for eastern european timezone
this._timeLoaded = now.toISOString();
this.createPostFormGroup = this._fb.group({
newPostMessage: new FormControl(''),
fileUpload: new FormControl('')
});
this._userService.getUserFromSessionStorageRequest().subscribe(
(res: object) => {
Object.assign(this.user, res);
this.loadFeed();
},
(err: HttpErrorResponse) => {
this.logout();
}
);
}
private loadFeed(): void {
this._feedService.getUserFeedFromSessionStorageRequest(this._currentPage++, this._timeLoaded, AppConstants.PAGE_SIZE).subscribe(
(result: object) => {
this.posts.push(...Object.values(result)[0]);
this.finishUserLoading();
},
(err) => {
this.finishUserLoading();
}
);
}
private finishUserLoading(): void {
this.dataArrived = true;
}
goToProfile(): void {
this._router.navigate(['/profile/' + this.user.userName]);
}
goToSettings(): void {
this._router.navigate(['/profile/' + this.user.userName + '/settings']);
}
logout(): void {
this._tokenService.logoutUserFromSessionStorage();
this._router.navigate(['/login']);
}
onFileUpload(event: any): void {
this.files.push(...event.target.files);
this.createPostFormGroup.get('fileUpload')?.reset();
}
removeAttachment(fileName: string): void {
this.files = this.files.filter(x => x.name !== fileName);
}
createPost(): void {
const postMessage = this.createPostFormGroup.get('newPostMessage')?.value;
this.dataArrived = false;
this._postService.createPostWithSessionStorageRequest(postMessage, this.files).subscribe(
(result: object) => {
this.goToProfile();
},
(err: HttpErrorResponse) => {
this.dataArrived = true;
}
);
}
onScroll(event: any): void {
// Detects when the element has reached the bottom, thx https://stackoverflow.com/a/50038429/12036073
if (event.target.offsetHeight + event.target.scrollTop >= event.target.scrollHeight && this._currentPage > 0) {
this.loadFeed();
}
}
}
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