Add middleware and logic for bootstrapping the session auth

src/auth/middleware/SessionAuthMiddleware.ts

@@ -0,0 +1,34 @@
+import {Middleware} from '../../http/routing/Middleware'
+import {Inject, Injectable} from '../../di'
+import {ResponseObject} from '../../http/routing/Route'
+import {Config} from '../../service/Config'
+import {AuthenticatableRepository} from '../types'
+import {SessionSecurityContext} from '../contexts/SessionSecurityContext'
+import {SecurityContext} from '../SecurityContext'
+import {ORMUserRepository} from '../orm/ORMUserRepository'
+import {AuthConfig} from '../config'
+
+/**
+ * Injects a SessionSecurityContext into the request and attempts to
+ * resume the user's authentication.
+ */
+@Injectable()
+export class SessionAuthMiddleware extends Middleware {
+    @Inject()
+    protected readonly config!: Config
+
+    async apply(): Promise<ResponseObject> {
+        const context = <SessionSecurityContext> this.make(SessionSecurityContext, this.getRepository())
+        this.request.registerSingletonInstance(SecurityContext, context)
+        await context.resume()
+    }
+
+    /**
+     * Build the correct AuthenticatableRepository based on the auth config.
+     * @protected
+     */
+    protected getRepository(): AuthenticatableRepository {
+        const config: AuthConfig | undefined = this.config.get('auth')
+        return this.make<AuthenticatableRepository>(config?.repositories?.session ?? ORMUserRepository)
+    }
+}