Introduce async local storage for request access, more view globals, and improved welcome view

src/auth/Authentication.ts

@@ -7,6 +7,8 @@ import {Middleware} from '../http/routing/Middleware'
 import {AuthRequiredMiddleware} from './middleware/AuthRequiredMiddleware'
 import {GuestRequiredMiddleware} from './middleware/GuestRequiredMiddleware'
 import {SessionAuthMiddleware} from './middleware/SessionAuthMiddleware'
+import {ViewEngine} from '../views/ViewEngine'
+import {SecurityContext} from './context/SecurityContext'
 
 @Injectable()
 export class Authentication extends Unit {
@@ -18,6 +20,13 @@ export class Authentication extends Unit {
 
     async up(): Promise<void> {
         this.middleware.registerNamespace('@auth', this.getMiddlewareResolver())
+
+        this.container().onResolve<ViewEngine>(ViewEngine)
+            .then((engine: ViewEngine) => {
+                engine.registerGlobalFactory('user', req => {
+                    return () => req?.make<SecurityContext>(SecurityContext)?.getUser()
+                })
+            })
     }
 
     protected getMiddlewareResolver(): CanonicalResolver<StaticInstantiable<Middleware>> {