adjust frontend to new backend

templates/api/middleware.mustache

@@ -0,0 +1,66 @@
+import {RequestContext, ResponseContext} from './http/http{{extensionForDeno}}';
+import { Observable, from } from {{#useRxJS}}'rxjs'{{/useRxJS}}{{^useRxJS}}'./rxjsStub{{extensionForDeno}}'{{/useRxJS}};
+
+/**
+ * Defines the contract for a middleware intercepting requests before
+ * they are sent (but after the RequestContext was created)
+ * and before the ResponseContext is unwrapped.
+ *
+ */
+export interface Middleware {
+    /**
+     * Modifies the request before the request is sent.
+     *
+     * @param context RequestContext of a request which is about to be sent to the server
+     * @returns an observable of the updated request context
+     *
+     */
+    pre(context: RequestContext): Observable<RequestContext>;
+    /**
+     * Modifies the returned response before it is deserialized.
+     *
+     * @param context ResponseContext of a sent request
+     * @returns an observable of the modified response context
+     */
+    post(context: ResponseContext): Observable<ResponseContext>;
+}
+
+export class PromiseMiddlewareWrapper implements Middleware {
+
+    public constructor(private middleware: PromiseMiddleware) {
+
+    }
+
+    pre(context: RequestContext): Observable<RequestContext> {
+        return from(this.middleware.pre(context));
+    }
+
+    post(context: ResponseContext): Observable<ResponseContext> {
+        return from(this.middleware.post(context));
+    }
+
+}
+
+/**
+ * Defines the contract for a middleware intercepting requests before
+ * they are sent (but after the RequestContext was created)
+ * and before the ResponseContext is unwrapped.
+ *
+ */
+export interface PromiseMiddleware {
+    /**
+     * Modifies the request before the request is sent.
+     *
+     * @param context RequestContext of a request which is about to be sent to the server
+     * @returns an observable of the updated request context
+     *
+     */
+    pre(context: RequestContext): Promise<RequestContext>;
+        /**
+     * Modifies the returned response before it is deserialized.
+     *
+     * @param context ResponseContext of a sent request
+     * @returns an observable of the modified response context
+     */
+    post(context: ResponseContext): Promise<ResponseContext>;
+}