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listen.go
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listen.go
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/*
* Copyright 2018 Johannes Donath <johannesd@torchmind.com>
* and other copyright owners as documented in the project's IP log.
*
* 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 command
import (
"flag"
"fmt"
"os"
"time"
"github.com/dotStart/Stockpile/entity"
"github.com/google/subcommands"
"golang.org/x/net/context"
)
type ListenCommand struct {
ClientCommand
}
func (*ListenCommand) Name() string {
return "listen"
}
func (*ListenCommand) Synopsis() string {
return "listens for events on a Stockpile server"
}
func (*ListenCommand) Usage() string {
return `Usage: stockpile listen [options]
This command listens to all record changes processed by a given Stockpile server:
$ stockpile listen
Available command specific flags:
`
}
func (c *ListenCommand) Execute(ctx context.Context, f *flag.FlagSet, _ ...interface{}) subcommands.ExitStatus {
client, err := c.createClient()
if err != nil {
fmt.Fprintf(os.Stderr, "failed to establish a connection to server \"%s\": %s\n", c.flagServerAddress, err)
return 1
}
stream, err := client.EventChannel(func(err error) {
fmt.Fprintf(os.Stderr, "failed to poll events: %s", err)
os.Exit(1)
})
fmt.Fprintf(os.Stderr, "listening for events:\n")
for event := range stream {
var entry string
switch event.Type {
case entity.ProfileIdEvent:
profileId, _ := event.ProfileIdPayload()
entry = fmt.Sprintf("updated name association for name \"%s\" to profile %s (valid from %s until %s)", profileId.Name, profileId.Id, profileId.FirstSeenAt, profileId.ValidUntil)
case entity.NameHistoryEvent:
id, _ := event.IdKey()
entry = fmt.Sprintf("updated name history for profile %s", id)
case entity.ProfileEvent:
profile, _ := event.ProfilePayload()
entry = fmt.Sprintf("updated profile %s (display name: \"%s\")", profile.Id, profile.Name)
case entity.BlacklistEvent:
entry = fmt.Sprintf("updated blacklist")
default:
entry = "Unknown Event"
}
fmt.Fprintf(os.Stdout, "[%s] %s\n", time.Now(), entry)
}
return 0
}