add gateway api

Signed-off-by: Roland.Ma <rolandma@yunify.com>

pkg/kapis/gateway/v1alpha1/handler.go

@@ -0,0 +1,118 @@
+/*
+Copyright 2021 KubeSphere Authors
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+     http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha1
+
+import (
+	"github.com/emicklei/go-restful"
+	"kubesphere.io/api/gateway/v1alpha1"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+
+	"kubesphere.io/kubesphere/pkg/api"
+	operator "kubesphere.io/kubesphere/pkg/models/gateway"
+	servererr "kubesphere.io/kubesphere/pkg/server/errors"
+	"kubesphere.io/kubesphere/pkg/simple/client/gateway"
+)
+
+type handler struct {
+	options *gateway.Options
+	gw      operator.GatewayOperator
+}
+
+//newHandler create an instance of the handler
+func newHandler(options *gateway.Options, client client.Client) *handler {
+	// Do not register Gateway scheme globally. Which will cause conflict in ks-controller-manager.
+	v1alpha1.AddToScheme(client.Scheme())
+	return &handler{
+		options: options,
+		gw:      operator.NewGatewayOperator(client, options),
+	}
+}
+
+func (h *handler) Create(request *restful.Request, response *restful.Response) {
+	ns := request.PathParameter("namespace")
+	var gateway v1alpha1.Gateway
+
+	err := request.ReadEntity(&gateway)
+	if err != nil {
+		api.HandleBadRequest(response, request, err)
+		return
+	}
+
+	created, err := h.gw.CreateGateway(ns, &gateway)
+	if err != nil {
+		api.HandleError(response, request, err)
+		return
+	}
+
+	response.WriteEntity(created)
+}
+
+func (h *handler) Update(request *restful.Request, response *restful.Response) {
+	ns := request.PathParameter("namespace")
+	var gateway v1alpha1.Gateway
+	err := request.ReadEntity(&gateway)
+	if err != nil {
+		api.HandleBadRequest(response, request, err)
+		return
+	}
+
+	updated, err := h.gw.UpdateGateway(ns, &gateway)
+	if err != nil {
+		api.HandleError(response, request, err)
+		return
+	}
+
+	response.WriteEntity(updated)
+}
+
+func (h *handler) Get(request *restful.Request, response *restful.Response) {
+	ns := request.PathParameter("namespace")
+	gateway, err := h.gw.GetGateways(ns)
+	if err != nil {
+		api.HandleError(response, request, err)
+		return
+	}
+	response.WriteEntity(gateway)
+}
+
+func (h *handler) Delete(request *restful.Request, response *restful.Response) {
+	ns := request.PathParameter("namespace")
+
+	err := h.gw.DeleteGateway(ns)
+	if err != nil {
+		api.HandleError(response, request, err)
+		return
+	}
+
+	response.WriteEntity(servererr.None)
+}
+
+func (h *handler) Upgrade(request *restful.Request, response *restful.Response) {
+	ns := request.PathParameter("namespace")
+
+	g, err := h.gw.UpgradeGateway(ns)
+	if err != nil {
+		api.HandleError(response, request, err)
+		return
+	}
+
+	response.WriteEntity(g)
+}
+
+func (h *handler) List(request *restful.Request, response *restful.Response) {
+	//TODO
+}