Add basic memory-based session driver

src/http/kernel/module/InjectSessionHTTPModule.ts

@@ -0,0 +1,30 @@
+import {HTTPKernelModule} from "../HTTPKernelModule";
+import {Injectable} from "@extollo/di"
+import {ErrorWithContext} from "@extollo/util"
+import {HTTPKernel} from "../HTTPKernel";
+import {Request} from "../../lifecycle/Request";
+import {SetSessionCookieHTTPModule} from "./SetSessionCookieHTTPModule";
+import {SessionFactory} from "../../session/SessionFactory";
+import {Session} from "../../session/Session";
+
+@Injectable()
+export class InjectSessionHTTPModule extends HTTPKernelModule {
+    public static register(kernel: HTTPKernel) {
+        kernel.register(this).after(SetSessionCookieHTTPModule)
+    }
+
+    public async apply(request: Request) {
+        request.registerFactory(new SessionFactory())
+
+        const session = <Session> request.make(Session)
+        const id = request.cookies.get('extollo.session')
+        if ( !id ) {
+            throw new ErrorWithContext('Session ID has not been set. Cannot inject session!')
+        }
+
+        session.setKey(id.value)
+        await session.load()
+
+        return request
+    }
+}

src/http/kernel/module/PersistSessionHTTPMiddleware.ts

@@ -0,0 +1,18 @@
+import {HTTPKernelModule} from "../HTTPKernelModule";
+import {Injectable} from "@extollo/di"
+import {HTTPKernel} from "../HTTPKernel";
+import {Request} from "../../lifecycle/Request";
+import {Session} from "../../session/Session";
+
+@Injectable()
+export class PersistSessionHTTPMiddleware extends HTTPKernelModule {
+    public static register(kernel: HTTPKernel) {
+        kernel.register(this).last()
+    }
+
+    public async apply(request: Request): Promise<Request> {
+        const session = <Session> request.make(Session)
+        await session.persist()
+        return request
+    }
+}

src/http/kernel/module/SetSessionCookieHTTPModule.ts

@@ -11,7 +11,7 @@ export class SetSessionCookieHTTPModule extends HTTPKernelModule {
     protected readonly logging!: Logging
 
     public static register(kernel: HTTPKernel) {
-        kernel.register(this).first()  // TODO make this before inject session?
+        kernel.register(this).first()
     }
 
     public async apply(request: Request) {