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//
// rhctl
//
// Copyright (C) 2009-2016 Christian Pointner <equinox@helsinki.at>
//
// This file is part of rhctl.
//
// rhctl is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// rhctl is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with rhctl. If not, see <http://www.gnu.org/licenses/>.
//
package main
import (
"github.com/spreadspace/telgo"
)
type TelnetInterface struct {
server *telgo.Server
}
func telnetCmdStatus(c *telgo.Client, args []string, ctrl *SwitchControl) bool {
ctrl.Commands <- &Command{Type: CmdStatus}
// TODO: implement this
return false
}
func telnetUpdateListener(c *telgo.Client, ctrl *SwitchControl) {
ch := c.UserData.(chan interface{})
for {
data, ok := <-ch
if !ok {
return
}
switch data.(type) {
case SwitchUpdate:
update := data.(SwitchUpdate)
if !c.Sayln("audio-switch status(%v): %s", update.Type, update.Data) {
ctrl.Updates.Unsub(ch)
return
}
case ServerStatus:
status := data.(ServerStatus)
if !c.Sayln("playout-server(%s): health=%s, channel=%s", status.Name, status.Health, status.Channel) {
ctrl.Updates.Unsub(ch)
return
}
default:
if !c.Sayln("unknown update of type: %T", data) {
ctrl.Updates.Unsub(ch)
return
}
}
}
}
func telnetCmdListen(c *telgo.Client, args []string, ctrl *SwitchControl) bool {
if len(args) <= 1 {
c.Sayln("missing argument: <type>")
return false
}
var ch chan interface{}
if c.UserData == nil {
ch = ctrl.Updates.Sub()
c.UserData = ch
} else {
ch = c.UserData.(chan interface{})
}
switch args[1] {
case "status":
ctrl.Updates.AddSub(ch, "status")
case "server":
ctrl.Updates.AddSub(ch, "server:status")
case "audio":
fallthrough
case "gpi":
fallthrough
case "oc":
fallthrough
case "relay":
fallthrough
case "silence":
ctrl.Updates.AddSub(ch, "switch:"+args[1])
default:
c.Sayln("unknown message type")
return false
}
go telnetUpdateListener(c, ctrl)
return false
}
func telnetCmdServer(c *telgo.Client, args []string, ctrl *SwitchControl) bool {
ctrl.Commands <- &Command{Type: CmdServer}
// TODO: implement this
return false
}
func telnetCmdSwitch(c *telgo.Client, args []string, ctrl *SwitchControl) bool {
if len(args) < 2 {
c.Sayln("missing switch command")
return false
}
resp := make(chan interface{})
ctrl.Commands <- &Command{Type: CmdSwitch, Args: args[1:], Response: resp}
r := <-resp
switch r.(type) {
case error:
c.Sayln("%v", r)
case SwitchResponse:
if r.(SwitchResponse).Result != SwitchOK {
c.Sayln("%v: %s", r.(SwitchResponse).Result, r.(SwitchResponse).Message)
}
default:
c.Sayln("invalid response of type %T: %+v", r, r)
}
return false
}
func telnetHelp(c *telgo.Client, args []string) bool {
switch len(args) {
case 2:
switch args[1] {
case "quit":
c.Sayln("usage: quit")
c.Sayln(" terminates the client connection. You may also use Ctrl-D to do this.")
return false
case "help":
c.Sayln("usage: help [ <cmd> ]")
c.Sayln(" prints command overview or detailed info to <cmd>.")
return false
case "status":
c.Sayln("usage: status")
c.Sayln(" show the status of the switch and servers")
return false
case "listen":
c.Sayln("usage: listen <type>")
c.Sayln(" subscribe to messages of type <type>. The following types are allowed:")
c.Sayln(" - status overall status changes")
c.Sayln(" - server status/health of the playout server")
c.Sayln(" - audio audio input/output mapping changes")
c.Sayln(" - gpi general purpose input status messages")
c.Sayln(" - oc open-collector status messages")
c.Sayln(" - relay relay status messages")
c.Sayln(" - silence status of the silence detector")
return false
case "server":
c.Sayln("usage: server <name>")
c.Sayln(" switch to the server of name <name>. If the given server name does not")
c.Sayln(" exist or is dead, the switch-over will be denied")
return false
case "switch":
c.Sayln("usage: switch <cmd> [ [ <arg1> ] ... ]")
c.Sayln(" send commands to tha audio switch directley.")
return false
}
fallthrough
default:
c.Sayln("usage: <cmd> [ [ <arg1> ] ... ]")
c.Sayln(" available commands:")
c.Sayln(" quit close connection (or use Ctrl-D)")
c.Sayln(" help [ <cmd> ] print this, or help for specific command")
c.Sayln(" status show status of switch and all servers")
c.Sayln(" listen <type> add listener for messages of type <type>")
c.Sayln(" server <name> switch to server <name>")
c.Sayln(" switch <cmd> [ [ <arg1> ] ... ] send command to switch")
}
return false
}
func telnetQuit(c *telgo.Client, args []string) bool {
return true
}
func (telnet *TelnetInterface) Run() {
rhdl.Printf("Telnet: handler running...")
if err := telnet.server.Run(); err != nil {
rhl.Printf("Telnet: server returned: %s", err)
}
}
func TelnetInit(conf *Config, ctrl *SwitchControl) (telnet *TelnetInterface) {
telnet = &TelnetInterface{}
cmdlist := make(telgo.CmdList)
cmdlist["status"] = func(c *telgo.Client, args []string) bool { return telnetCmdStatus(c, args, ctrl) }
cmdlist["listen"] = func(c *telgo.Client, args []string) bool { return telnetCmdListen(c, args, ctrl) }
cmdlist["server"] = func(c *telgo.Client, args []string) bool { return telnetCmdServer(c, args, ctrl) }
cmdlist["switch"] = func(c *telgo.Client, args []string) bool { return telnetCmdSwitch(c, args, ctrl) }
cmdlist["help"] = telnetHelp
cmdlist["quit"] = telnetQuit
telnet.server = telgo.NewServer(conf.Clients.Telnet.Address, "rhctl> ", cmdlist, nil)
return
}
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