src/app/ui/login/login.component.ts

import {OnInit} from '@angular/core'
import {Component, ViewChild} from '@angular/core'
import {NgForm} from '@angular/forms'
import {RestUrlService} from '../../services/rest/rest-url.service'
import {RouterService} from '../../services/router/router.service'
import {SessionService} from '../../services/session/session.service'

@Component({
    selector: 'app-login',
    templateUrl: './login.component.html',
    styleUrls: ['./login.component.css']
})
export class LoginComponent implements OnInit {
    apiEndpoint: string

    email: string

    password: string

    @ViewChild('loginForm')
    private _loginForm: NgForm

    private _error: any

    private _loading = false

    constructor(
        private _restUrl: RestUrlService,
        private _routing: RouterService,
        private _sessions: SessionService
    ) {
        // No-op.
    }

    get error(): any {
        return this._error
    }

    get loading(): boolean {
        return this._loading
    }

    ngOnInit(): void {
        this.apiEndpoint = this._restUrl.apiEndpoint
    }

    public async login() {
        if (this._loginForm.valid) {
            try {
                this._loading = true
                this._error = null

                this._restUrl.apiEndpoint = this.apiEndpoint

                await this._sessions.login(this.email, this.password).toPromise()

                this._routing.goToMain()
            } catch (e) {
                this._error = e
            } finally {
                this._loading = false
            }
        }
    }
}