Refactor mqtrigger command (#1375)

pkg/fission-cli/cmd/mqtrigger/list.go

@@ -0,0 +1,73 @@
+/*
+Copyright 2019 The Fission 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 mqtrigger
+
+import (
+	"fmt"
+	"os"
+	"text/tabwriter"
+
+	"github.com/pkg/errors"
+
+	"github.com/fission/fission/pkg/controller/client"
+	"github.com/fission/fission/pkg/fission-cli/cliwrapper/cli"
+	"github.com/fission/fission/pkg/fission-cli/cmd"
+)
+
+type ListSubCommand struct {
+	client    *client.Client
+	namespace string
+}
+
+func List(flags cli.Input) error {
+	opts := ListSubCommand{
+		client: cmd.GetServer(flags),
+	}
+	return opts.do(flags)
+}
+
+func (opts *ListSubCommand) do(flags cli.Input) error {
+	err := opts.complete(flags)
+	if err != nil {
+		return err
+	}
+	return opts.run(flags)
+}
+
+func (opts *ListSubCommand) complete(flags cli.Input) error {
+	opts.namespace = flags.String("triggerns")
+	return nil
+}
+
+func (opts *ListSubCommand) run(flags cli.Input) error {
+	mqts, err := opts.client.MessageQueueTriggerList(flags.String("mqtype"), opts.namespace)
+	if err != nil {
+		return errors.Wrap(err, "error listing message queue triggers")
+	}
+
+	w := tabwriter.NewWriter(os.Stdout, 0, 0, 1, ' ', 0)
+
+	fmt.Fprintf(w, "%v\t%v\t%v\t%v\t%v\t%v\t%v\t%v\n",
+		"NAME", "FUNCTION_NAME", "MESSAGE_QUEUE_TYPE", "TOPIC", "RESPONSE_TOPIC", "ERROR_TOPIC", "MAX_RETRIES", "PUB_MSG_CONTENT_TYPE")
+	for _, mqt := range mqts {
+		fmt.Fprintf(w, "%v\t%v\t%v\t%v\t%v\t%v\t%v\t%v\n",
+			mqt.Metadata.Name, mqt.Spec.FunctionReference.Name, mqt.Spec.MessageQueueType, mqt.Spec.Topic, mqt.Spec.ResponseTopic, mqt.Spec.ErrorTopic, mqt.Spec.MaxRetries, mqt.Spec.ContentType)
+	}
+	w.Flush()
+
+	return nil
+}