Account Email Support (#1000)

* Moved the Server Settings out into a button on nav header

* Refactored Mange Users page to the new design (skeleton). Implemented skeleton code for Invite User.

* Hashed out more of the code, but need to move all the email code to a Kavita controlled API server due to password credentials.

* Cleaned up some warnings

* When no user exists for an api key in Plugin controller, throw 401.

* Hooked in the ability to check if the Kavita instance can be accessed externally so we can determine if the user can invite or not.

* Hooked up some logic if the user's server isn't accessible, then default to old flow

* Basic flow is working for confirm email. Needs validation, error handling, etc.

* Refactored Password validation to account service

* Cleaned up the code in confirm-email to work much better.

* Refactored the login page to have a container functionality, so we can reuse the styles on multiple pages (registration pages). Hooked up the code for confirm email.

* Messy code, but making progress. Refactored Register to be used only for first time user registration. Added a new register component to handle first time flow only.

* Invite works much better, still needs a bit of work for non-accessible server setup. Started work on underlying manage users page to meet new design.

* Changed (you) to a star to indicate who you're logged in as.

* Inviting a user is now working and tested fully.

* Removed the register member component as we now have invite and confirm components.

* Editing a user is now working. Username change and Role/Library access from within one screen. Email changing is on hold.

* Cleaned up code for edit user and disabled email field for now.

* Cleaned up the code to indicate changing a user's email is not possible.

* Implemented a migration for existing accounts so they can validate their emails and still login.

* Change url for email server

* Implemented the ability to resend an email confirmation code (or regenerate for non accessible servers). Fixed an overflow on the confirm dialog.

* Took care of some code cleanup

* Removed 3 db calls from cover refresh and some misc cleanup

* Fixed a broken test

UI/Web/src/app/registration/register/register.component.ts

@@ -0,0 +1,46 @@
+import { Component, OnInit } from '@angular/core';
+import { FormGroup, FormControl, Validators } from '@angular/forms';
+import { ActivatedRoute, Router } from '@angular/router';
+import { ToastrService } from 'ngx-toastr';
+import { take } from 'rxjs/operators';
+import { AccountService } from 'src/app/_services/account.service';
+import { MemberService } from 'src/app/_services/member.service';
+
+/**
+ * This is exclusivly used to register the first user on the server and nothing else
+ */
+@Component({
+  selector: 'app-register',
+  templateUrl: './register.component.html',
+  styleUrls: ['./register.component.scss']
+})
+export class RegisterComponent implements OnInit {
+
+  registerForm: FormGroup = new FormGroup({
+    email: new FormControl('', [Validators.required, Validators.email]),
+    username: new FormControl('', [Validators.required]),
+    password: new FormControl('', [Validators.required, Validators.maxLength(32), Validators.minLength(6)]),
+  });
+
+  constructor(private route: ActivatedRoute, private router: Router, private accountService: AccountService, private toastr: ToastrService, private memberService: MemberService) {
+    this.memberService.adminExists().pipe(take(1)).subscribe(adminExists => {
+      if (adminExists) {
+        this.router.navigateByUrl('login');
+      }
+    });
+  }
+
+  ngOnInit(): void {
+  }
+
+  submit() {
+    const model = this.registerForm.getRawValue();
+    this.accountService.register(model).subscribe((user) => {
+      this.toastr.success('Account registration complete');
+      this.router.navigateByUrl('login');
+    }, err => {
+      // TODO: Handle errors
+    });
+  }
+
+}