[feature] Limit account switching to 5 account maximum

src/app/app-routing.module.ts

@@ -7,6 +7,8 @@ import {
 import { AuthGuardService } from 'jslib-angular/services/auth-guard.service';
 import { LockGuardService } from 'jslib-angular/services/lock-guard.service';
 
+import { LoginGuardService } from 'src/services/loginGuard.service';
+
 import { HintComponent } from './accounts/hint.component';
 import { LockComponent } from './accounts/lock.component';
 import { LoginComponent } from './accounts/login.component';
@@ -31,6 +33,7 @@ const routes: Routes = [
     {
         path: 'login',
         component: LoginComponent,
+        canActivate: [LoginGuardService],
     },
     { path: '2fa', component: TwoFactorComponent },
     { path: 'register', component: RegisterComponent },

src/app/services.module.ts

@@ -128,7 +128,7 @@ const organizationService = new OrganizationService(stateService);
 const providerService: ProviderServiceAbstraction = new ProviderService(stateService);
 const policyService = new PolicyService(stateService, organizationService, apiService);
 const keyConnectorService = new KeyConnectorService(stateService, cryptoService, apiService,
-    environmentService, tokenService, logService, organizationService);
+    tokenService, logService, organizationService);
 const vaultTimeoutService = new VaultTimeoutService(cipherService, folderService, collectionService,
     cryptoService, platformUtilsService, messagingService, searchService, tokenService, policyService, keyConnectorService,
     stateService, null,

src/locales/en/messages.json

@@ -1783,5 +1783,8 @@
   },
   "lockAllVaults": {
     "message": "Lock All Vaults"
+  },
+  "accountLimitReached": {
+    "message": "No more than 5 accounts may be logged in at the same time."
   }
 }

src/services/loginGuard.service.ts

@@ -0,0 +1,27 @@
+import { Injectable } from '@angular/core';
+import {
+    CanActivate,
+    Router,
+} from '@angular/router';
+
+import { ToasterService } from 'angular2-toaster';
+
+import { I18nService } from 'jslib-common/abstractions/i18n.service';
+import { StateService } from 'jslib-common/abstractions/state.service';
+
+@Injectable()
+export class LoginGuardService implements CanActivate {
+    protected homepage = 'vault';
+    constructor(private stateService: StateService, private router: Router,
+        private toasterService: ToasterService, private i18nService: I18nService) { }
+
+    async canActivate() {
+        const accounts = this.stateService.accounts.getValue();
+        if (accounts != null && Object.keys(accounts).length >= 5) {
+            this.toasterService.popAsync('error', null, this.i18nService.t('accountLimitReached'));
+            this.router.navigate(['vault']);
+        }
+
+        return true;
+    }
+}